1977
852 tornadoes, 1 tropical cyclone near the U.S., 5 notable earthquakes. 60 tornadoes were rated F3/EF3 or stronger and tornadoes killed 43.
Tornadoes
852 recorded; 60 rated F3/EF3 or stronger.
Outbreak days
- May 4, 197730 tornadoes, 3 killed
Strongest and deadliest first
| Apr 4, 1977 | F5 | Jefferson | 14.7 | 22 |
| Feb 23, 1977 | F4 | Winston | 15.0 | 2 |
| Apr 2, 1977 | F4 | Eaton | 16.6 | 1 |
| May 4, 1977 | F4 | Ray, Carroll, Chariton | 48.6 | 0 |
| May 18, 1977 | F4 | Cimarron, Baca | 38.6 | 0 |
| Aug 31, 1977 | F4 | Marathon | 31.8 | 0 |
| Jul 7, 1977 | F4 | Thurston, Burt | 22.6 | 0 |
| Jul 30, 1977 | F4 | Chippewa | 19.0 | 0 |
| Apr 2, 1977 | F4 | Kalamazoo | 12.4 | 0 |
| May 4, 1977 | F4 | Jackson, Clay, Ray | 12.0 | 0 |
| May 5, 1977 | F4 | Logan, De Witt | 7.3 | 0 |
| May 4, 1977 | F4 | Webster | 2.0 | 0 |
| Aug 21, 1977 | F3 | Shelby, Cumberland | 26.9 | 6 |
| May 4, 1977 | F3 | Bates, Cass | 29.8 | 2 |
| May 4, 1977 | F3 | Lafayette | 26.2 | 1 |
| Dec 13, 1977 | F3 | Harris, Liberty | 25.1 | 1 |
| Apr 4, 1977 | F3 | Floyd | 8.8 | 1 |
| Apr 4, 1977 | F3 | St. Clair | 7.3 | 1 |
| Apr 21, 1977 | F3 | St. Martin | 3.8 | 1 |
| May 15, 1977 | F3 | Stephens | 0.8 | 1 |
| Jun 5, 1977 | F3 | Fond du Lac, Dodge, Washington | 69.5 | 0 |
| May 16, 1977 | F3 | Adams, Hall, Hamilton | 47.3 | 0 |
| May 4, 1977 | F3 | Douglas, Johnson | 31.6 | 0 |
| Aug 26, 1977 | F3 | Cass, Crow Wing | 26.3 | 0 |
| Mar 28, 1977 | F3 | Sharkey | 24.5 | 0 |
| Dec 13, 1977 | F3 | Amite, Pike | 20.4 | 0 |
| May 18, 1977 | F3 | Cherry | 18.8 | 0 |
| May 16, 1977 | F3 | Beckham, Roger Mills | 18.2 | 0 |
| May 4, 1977 | F3 | Tama | 17.8 | 0 |
| Jul 6, 1977 | F3 | Renville, Bottineau | 17.2 | 0 |
| May 16, 1977 | F3 | Collingsworth | 16.7 | 0 |
| Jun 10, 1977 | F3 | Palo Alto, Kossuth | 14.9 | 0 |
| May 16, 1977 | F3 | Collingsworth, Wheeler | 12.1 | 0 |
| Apr 4, 1977 | F3 | Neshoba, Kemper | 11.7 | 0 |
| Jul 7, 1977 | F3 | Howard | 11.6 | 0 |
| Feb 23, 1977 | F3 | Leake | 11.4 | 0 |
| May 4, 1977 | F3 | Pettis | 11.2 | 0 |
| Feb 23, 1977 | F3 | Attala | 10.5 | 0 |
| May 20, 1977 | F3 | Jackson | 10.4 | 0 |
| May 20, 1977 | F3 | Oklahoma, Logan | 9.9 | 0 |
| Mar 30, 1977 | F3 | DeKalb | 9.2 | 0 |
| Apr 4, 1977 | F3 | Calhoun | 9.1 | 0 |
| Jul 30, 1977 | F3 | St. Croix, Polk, Barron | 9.1 | 0 |
| Dec 24, 1977 | F3 | Copiah | 8.0 | 0 |
| Jul 10, 1977 | F3 | Arthur, McPherson | 7.8 | 0 |
| May 4, 1977 | F3 | Colfax | 7.6 | 0 |
| Sep 11, 1977 | F3 | Adams, Clay | 6.6 | 0 |
| May 16, 1977 | F3 | Beckham | 6.5 | 0 |
| Jun 30, 1977 | F3 | LaSalle | 6.1 | 0 |
| Nov 1, 1977 | F3 | Bowie | 5.9 | 0 |
| Jul 9, 1977 | F3 | Goochland | 5.9 | 0 |
| Sep 26, 1977 | F3 | Somerset | 5.9 | 0 |
| Mar 4, 1977 | F3 | Greene | 4.9 | 0 |
| Jun 13, 1977 | F3 | El Paso | 4.9 | 0 |
| Mar 2, 1977 | F3 | Stephens | 4.3 | 0 |
| Apr 19, 1977 | F3 | Ward | 4.3 | 0 |
| Aug 6, 1977 | F3 | Sangamon | 4.1 | 0 |
| May 20, 1977 | F3 | Tillman | 1.5 | 0 |
| Oct 1, 1977 | F3 | Hamilton | 0.7 | 0 |
| May 14, 1977 | F3 | Harding | 0.1 | 0 |
| Jul 30, 1977 | F2 | Chippewa, Taylor, Rusk | 34.5 | 1 |
| Dec 5, 1977 | F2 | Putnam | 9.4 | 1 |
| Sep 14, 1977 | F2 | Lawrence | 2.0 | 1 |
| May 18, 1977 | F2 | Finney, Morton, Stevens | 117.2 | 0 |
| Aug 26, 1977 | F2 | Otter Tail, Wadena, Cass | 110.4 | 0 |
| Apr 14, 1977 | F2 | Travis, Williamson | 41.0 | 0 |
| May 19, 1977 | F2 | Hall | 20.8 | 0 |
| Mar 29, 1977 | F2 | Autauga, Elmore | 20.5 | 0 |
| May 18, 1977 | F2 | Cherry | 19.7 | 0 |
| Sep 23, 1977 | F2 | Marion, Adams | 19.5 | 0 |
| Jul 31, 1977 | F2 | Antrim, Charlevoix | 19.4 | 0 |
| May 21, 1977 | F2 | Le Sueur, Scott | 19.3 | 0 |
| May 2, 1977 | F2 | Travis, Bastrop | 17.7 | 0 |
| May 18, 1977 | F2 | Cimarron | 16.1 | 0 |
| Jul 10, 1977 | F2 | Cherry, Bennett | 15.9 | 0 |
| Mar 11, 1977 | F2 | Harrison | 14.9 | 0 |
| May 20, 1977 | F2 | Oklahoma | 14.9 | 0 |
| Feb 23, 1977 | F2 | Greene | 13.9 | 0 |
| May 20, 1977 | F2 | Caddo | 13.3 | 0 |
| Oct 1, 1977 | F2 | Owsley | 12.8 | 0 |
| Mar 28, 1977 | F2 | Lafayette | 12.0 | 0 |
| May 4, 1977 | F2 | Miami | 11.9 | 0 |
| Mar 30, 1977 | F2 | Gordon | 11.0 | 0 |
| May 27, 1977 | F2 | Nobles | 10.3 | 0 |
| Apr 20, 1977 | F2 | Callahan | 9.7 | 0 |
| Oct 1, 1977 | F2 | Randolph | 9.4 | 0 |
| Apr 2, 1977 | F2 | Waukesha, Milwaukee | 9.3 | 0 |
| May 21, 1977 | F2 | Pottawatomie | 9.2 | 0 |
| Jul 14, 1977 | F2 | Fillmore | 9.2 | 0 |
| Mar 2, 1977 | F2 | Carter | 8.8 | 0 |
| Jun 20, 1977 | F2 | Preston, Garrett | 8.5 | 0 |
| Sep 6, 1977 | F2 | Tuscaloosa | 8.3 | 0 |
| Jun 14, 1977 | F2 | Bowman | 8.2 | 0 |
| Aug 2, 1977 | F2 | Dewey | 8.0 | 0 |
| May 20, 1977 | F2 | Caddo | 7.8 | 0 |
| May 4, 1977 | F2 | Johnson | 7.8 | 0 |
| Mar 2, 1977 | F2 | Custer | 7.4 | 0 |
| May 20, 1977 | F2 | Wilbarger | 7.3 | 0 |
| Apr 4, 1977 | F2 | Jackson | 6.9 | 0 |
| Jun 30, 1977 | F2 | Lake | 6.8 | 0 |
| Mar 28, 1977 | F2 | Winn | 6.1 | 0 |
| Apr 4, 1977 | F2 | Cullman | 5.9 | 0 |
| Apr 2, 1977 | F2 | Livingston | 5.6 | 0 |
| Aug 9, 1977 | F2 | Watonwan | 5.6 | 0 |
| May 2, 1977 | F2 | Hancock | 5.4 | 0 |
| Mar 28, 1977 | F2 | Issaquena | 5.2 | 0 |
| May 2, 1977 | F2 | Jackson | 5.2 | 0 |
| Apr 13, 1977 | F2 | Crowley | 5.1 | 0 |
| Mar 2, 1977 | F2 | Grady | 4.9 | 0 |
| Apr 4, 1977 | F2 | Etowah | 4.7 | 0 |
| Jul 18, 1977 | F2 | Hillsdale | 4.7 | 0 |
| Jul 25, 1977 | F2 | Muskogee | 4.5 | 0 |
| Sep 18, 1977 | F2 | Erie | 4.5 | 0 |
| Mar 3, 1977 | F2 | Madison | 4.1 | 0 |
| May 20, 1977 | F2 | Kiowa | 3.6 | 0 |
| Jun 25, 1977 | F2 | Pittsylvania | 3.6 | 0 |
| Sep 8, 1977 | F2 | Aitkin | 3.6 | 0 |
| Feb 23, 1977 | F2 | McCurtain | 3.3 | 0 |
| Apr 2, 1977 | F2 | Clinton | 3.3 | 0 |
| Apr 4, 1977 | F2 | St. Clair | 3.3 | 0 |
| May 19, 1977 | F2 | Garvin | 3.3 | 0 |
| May 1, 1977 | F2 | Beaver | 2.7 | 0 |
| Mar 30, 1977 | F2 | DeKalb | 2.5 | 0 |
| Jul 4, 1977 | F2 | Arenac | 2.5 | 0 |
| Sep 12, 1977 | F2 | Collin | 2.5 | 0 |
| Jun 9, 1977 | F2 | Scotts Bluff, Morrill | 2.3 | 0 |
| Jul 13, 1977 | F2 | Polk | 2.3 | 0 |
| Aug 3, 1977 | F2 | Estill | 2.3 | 0 |
| Aug 6, 1977 | F2 | Sangamon | 2.3 | 0 |
| Oct 1, 1977 | F2 | Laurel | 2.0 | 0 |
| Oct 1, 1977 | F2 | Hardin | 2.0 | 0 |
| Mar 28, 1977 | F2 | Clinton | 2.0 | 0 |
| Mar 30, 1977 | F2 | Gilmer | 2.0 | 0 |
| Apr 2, 1977 | F2 | Lowndes | 2.0 | 0 |
| Apr 5, 1977 | F2 | Dauphin | 2.0 | 0 |
| May 4, 1977 | F2 | Lee | 2.0 | 0 |
| May 4, 1977 | F2 | Des Moines | 2.0 | 0 |
| Jun 30, 1977 | F2 | Bollinger | 2.0 | 0 |
| Jul 13, 1977 | F2 | Polk | 2.0 | 0 |
| Sep 17, 1977 | F2 | Genesee | 2.0 | 0 |
| Sep 18, 1977 | F2 | Madison | 2.0 | 0 |
| May 20, 1977 | F2 | Logan | 1.9 | 0 |
| May 30, 1977 | F2 | Frontier | 1.9 | 0 |
| Jun 14, 1977 | F2 | Scotts Bluff | 1.9 | 0 |
| Jul 16, 1977 | F2 | Bremer | 1.9 | 0 |
| Sep 5, 1977 | F2 | Tangipahoa | 1.7 | 0 |
| Mar 18, 1977 | F2 | Lincoln | 1.5 | 0 |
| Mar 18, 1977 | F2 | Lincoln | 1.5 | 0 |
| Apr 20, 1977 | F2 | Dallas | 1.5 | 0 |
| Apr 2, 1977 | F2 | Ingham | 1.5 | 0 |
| Jun 22, 1977 | F2 | Etowah | 1.2 | 0 |
| Nov 29, 1977 | F2 | Livingston | 1.0 | 0 |
| Nov 8, 1977 | F2 | Vermilion | 1.0 | 0 |
| Dec 13, 1977 | F2 | Jones | 1.0 | 0 |
| Jan 9, 1977 | F2 | Smith | 1.0 | 0 |
| Mar 2, 1977 | F2 | Carter | 1.0 | 0 |
| Apr 11, 1977 | F2 | El Paso | 1.0 | 0 |
| May 4, 1977 | F2 | Webster | 1.0 | 0 |
| Jun 13, 1977 | F2 | El Paso | 1.0 | 0 |
| Jun 13, 1977 | F2 | El Paso | 1.0 | 0 |
| Jun 13, 1977 | F2 | El Paso | 1.0 | 0 |
| Jul 13, 1977 | F2 | Polk | 1.0 | 0 |
| Aug 21, 1977 | F2 | Carroll | 1.0 | 0 |
| Apr 19, 1977 | F2 | Tillman | 0.8 | 0 |
| Jun 17, 1977 | F2 | Benton | 0.7 | 0 |
| Jun 30, 1977 | F2 | Huron | 0.7 | 0 |
| Jul 27, 1977 | F2 | Hood | 0.7 | 0 |
| Jun 16, 1977 | F2 | Smith | 0.6 | 0 |
| Nov 15, 1977 | F2 | Polk | 0.5 | 0 |
| Apr 4, 1977 | F2 | St. Clair | 0.5 | 0 |
| May 17, 1977 | F2 | Hale | 0.5 | 0 |
| Jun 30, 1977 | F2 | Richland | 0.5 | 0 |
| Jun 30, 1977 | F2 | Pecos | 0.5 | 0 |
| Jun 30, 1977 | F2 | Stark | 0.5 | 0 |
| Jun 7, 1977 | F2 | Itasca | 0.5 | 0 |
| Jul 8, 1977 | F2 | Jefferson | 0.5 | 0 |
| Mar 28, 1977 | F2 | Macon | 0.3 | 0 |
| Feb 23, 1977 | F2 | Greene | 0.2 | 0 |
| Apr 20, 1977 | F2 | East Baton Rouge | 0.2 | 0 |
| Jun 9, 1977 | F2 | Kent | 0.2 | 0 |
| Jul 17, 1977 | F2 | Madison | 0.2 | 0 |
| Aug 22, 1977 | F2 | Navarro | 0.2 | 0 |
| Sep 14, 1977 | F2 | Iberia | 0.2 | 0 |
| Mar 27, 1977 | F2 | Collin | 0.1 | 0 |
| Mar 28, 1977 | F2 | Forrest | 0.1 | 0 |
| Mar 28, 1977 | F2 | Forrest | 0.1 | 0 |
| Apr 18, 1977 | F2 | Delta | 0.1 | 0 |
| May 4, 1977 | F2 | Henry | 0.1 | 0 |
| May 4, 1977 | F2 | Martin | 0.1 | 0 |
| Jun 16, 1977 | F2 | Mobile | 0.1 | 0 |
| Jun 29, 1977 | F2 | Kimball, Cheyenne | 0.1 | 0 |
| Jul 27, 1977 | F2 | Meeker | 0.1 | 0 |
| Jul 9, 1977 | F2 | Phillips | 0.1 | 0 |
| Sep 15, 1977 | F2 | Coryell | 0.1 | 0 |
| Sep 24, 1977 | F2 | Lawrence | 0.1 | 0 |
| Sep 5, 1977 | F2 | Harrison | 0.1 | 0 |
| Oct 1, 1977 | F1 | Harrison | 0.5 | 1 |
| Mar 3, 1977 | F1 | Morehouse, West Carroll, East Carroll | 38.0 | 0 |
| Mar 3, 1977 | F1 | Lincoln, Union | 34.1 | 0 |
| Mar 3, 1977 | F1 | Union, Morehouse | 31.6 | 0 |
| Jun 6, 1977 | F1 | Madison, Buncombe | 28.5 | 0 |
| Dec 5, 1977 | F1 | Rockcastle | 25.0 | 0 |
| Jun 6, 1977 | F1 | Lafayette, Vermilion | 23.1 | 0 |
| Sep 24, 1977 | F1 | Kingsbury | 21.3 | 0 |
| Jul 4, 1977 | F1 | Cass | 20.7 | 0 |
| Nov 8, 1977 | F1 | Wharton | 20.5 | 0 |
| Mar 4, 1977 | F1 | Greene | 18.2 | 0 |
| Jun 6, 1977 | F1 | Madison, Buncombe, Yancey | 18.1 | 0 |
| Oct 25, 1977 | F1 | Baldwin | 16.2 | 0 |
| Oct 1, 1977 | F1 | Sullivan | 16.2 | 0 |
| Jul 10, 1977 | F1 | Ziebach | 16.0 | 0 |
| Jun 30, 1977 | F1 | Vanderburgh | 15.3 | 0 |
| Oct 8, 1977 | F1 | Wilkinson | 15.0 | 0 |
| May 5, 1977 | F1 | Des Moines | 14.1 | 0 |
| Jun 28, 1977 | F1 | Berrien, Van Buren | 13.8 | 0 |
| Apr 2, 1977 | F1 | Shiawassee | 12.0 | 0 |
| Jul 30, 1977 | F1 | Brown | 11.8 | 0 |
| Sep 18, 1977 | F1 | Cattaraugus | 11.7 | 0 |
| Apr 2, 1977 | F1 | Boone, Kenton | 11.6 | 0 |
| Jun 30, 1977 | F1 | Crawford, Richland | 11.6 | 0 |
| Mar 4, 1977 | F1 | Robeson | 11.5 | 0 |
| Aug 17, 1977 | F1 | Henderson, Polk | 11.5 | 0 |
| Feb 27, 1977 | F1 | Craven | 11.4 | 0 |
| Jul 4, 1977 | F1 | Isabella, Montcalm | 11.2 | 0 |
| Mar 16, 1977 | F1 | Orange | 10.9 | 0 |
| Dec 5, 1977 | F1 | Orangeburg | 9.8 | 0 |
| May 28, 1977 | F1 | Blue Earth, Nicollet | 9.4 | 0 |
| Oct 1, 1977 | F1 | Fayette | 9.2 | 0 |
| May 17, 1977 | F1 | Williams, Mountrail | 8.5 | 0 |
| Jul 31, 1977 | F1 | Leelanau | 8.4 | 0 |
| Jun 15, 1977 | F1 | Barnes | 8.3 | 0 |
| Jun 5, 1977 | F1 | Dodge | 8.2 | 0 |
| May 5, 1977 | F1 | Wichita | 7.8 | 0 |
| Aug 6, 1977 | F1 | Sangamon | 7.8 | 0 |
| Apr 2, 1977 | F1 | Richland, Ashland | 7.6 | 0 |
| Dec 24, 1977 | F1 | Lee | 7.4 | 0 |
| Mar 11, 1977 | F1 | Ozark | 7.3 | 0 |
| Jul 10, 1977 | F1 | Haakon | 7.3 | 0 |
| Jul 4, 1977 | F1 | Genesee, Lapeer | 6.9 | 0 |
| Mar 3, 1977 | F1 | Caldwell | 6.8 | 0 |
| Jul 30, 1977 | F1 | Barron | 6.6 | 0 |
| Apr 4, 1977 | F1 | Wilkes | 6.4 | 0 |
| May 17, 1977 | F1 | Armstrong | 6.4 | 0 |
| Jun 12, 1977 | F1 | Washita | 6.4 | 0 |
| Jun 12, 1977 | F1 | Washita | 6.4 | 0 |
| Jun 21, 1977 | F1 | Alachua | 6.4 | 0 |
| Mar 11, 1977 | F1 | Morehouse | 6.2 | 0 |
| May 5, 1977 | F1 | Wichita | 6.2 | 0 |
| Aug 6, 1977 | F1 | Sangamon | 6.2 | 0 |
| Aug 6, 1977 | F1 | Sangamon | 6.1 | 0 |
| Aug 6, 1977 | F1 | Sangamon | 5.9 | 0 |
| Mar 2, 1977 | F1 | Grady, McClain | 5.7 | 0 |
| Apr 4, 1977 | F1 | Bartow | 5.7 | 0 |
| Jul 4, 1977 | F1 | Monroe | 5.7 | 0 |
| Apr 5, 1977 | F1 | Cook | 5.4 | 0 |
| May 18, 1977 | F1 | McLean, Ward | 5.4 | 0 |
| Apr 4, 1977 | F1 | Lumpkin | 5.2 | 0 |
| Sep 17, 1977 | F1 | St. Clair | 5.2 | 0 |
| Nov 8, 1977 | F1 | Waller | 5.1 | 0 |
| Dec 5, 1977 | F1 | McMinn | 5.1 | 0 |
| Mar 17, 1977 | F1 | Pawnee | 5.1 | 0 |
| Apr 19, 1977 | F1 | Lea | 5.1 | 0 |
| May 20, 1977 | F1 | Major | 5.1 | 0 |
| Oct 1, 1977 | F1 | Marion | 4.7 | 0 |
| Mar 10, 1977 | F1 | Cleveland | 4.7 | 0 |
| Jul 29, 1977 | F1 | Jefferson, Orleans | 4.6 | 0 |
| May 9, 1977 | F1 | Johnson | 4.5 | 0 |
| Oct 1, 1977 | F1 | Union | 4.3 | 0 |
| May 4, 1977 | F1 | Davis | 4.3 | 0 |
| May 20, 1977 | F1 | Garfield | 4.1 | 0 |
| Jun 30, 1977 | F1 | Paulding | 4.1 | 0 |
| Mar 2, 1977 | F1 | Dewey | 3.8 | 0 |
| May 21, 1977 | F1 | Grundy | 3.8 | 0 |
| Jun 24, 1977 | F1 | Greene | 3.8 | 0 |
| Aug 6, 1977 | F1 | Sangamon | 3.6 | 0 |
| Mar 28, 1977 | F1 | Attala | 3.3 | 0 |
| May 17, 1977 | F1 | Montgomery | 3.3 | 0 |
| May 17, 1977 | F1 | Barry | 3.3 | 0 |
| May 1, 1977 | F1 | Evangeline | 3.3 | 0 |
| Jun 30, 1977 | F1 | Sandusky | 3.3 | 0 |
| Aug 5, 1977 | F1 | Iosco | 3.3 | 0 |
| Aug 6, 1977 | F1 | Sangamon | 3.3 | 0 |
| Apr 18, 1977 | F1 | Fannin | 3.0 | 0 |
| Jul 18, 1977 | F1 | McLean | 3.0 | 0 |
| Aug 6, 1977 | F1 | Christian | 2.8 | 0 |
| May 20, 1977 | F1 | Garvin | 2.7 | 0 |
| May 31, 1977 | F1 | Monroe | 2.7 | 0 |
| Jun 6, 1977 | F1 | Madison | 2.7 | 0 |
| Jul 28, 1977 | F1 | Pawnee | 2.7 | 0 |
| Jun 17, 1977 | F1 | York, Saline | 2.6 | 0 |
| Jun 20, 1977 | F1 | Duval | 2.6 | 0 |
| Jul 12, 1977 | F1 | Union | 2.6 | 0 |
| May 20, 1977 | F1 | Grady | 2.5 | 0 |
| Jun 20, 1977 | F1 | Stafford | 2.5 | 0 |
| Sep 5, 1977 | F1 | Washington | 2.5 | 0 |
| Jun 30, 1977 | F1 | Will | 2.3 | 0 |
| Aug 6, 1977 | F1 | Sangamon | 2.2 | 0 |
| Feb 23, 1977 | F1 | Logan | 2.0 | 0 |
| Feb 23, 1977 | F1 | St. Louis | 2.0 | 0 |
| Mar 4, 1977 | F1 | Moore | 2.0 | 0 |
| Apr 16, 1977 | F1 | Wichita | 2.0 | 0 |
| Apr 18, 1977 | F1 | Stephens | 2.0 | 0 |
| Apr 18, 1977 | F1 | Custer | 2.0 | 0 |
| Apr 23, 1977 | F1 | Sullivan | 2.0 | 0 |
| Apr 4, 1977 | F1 | Murray | 2.0 | 0 |
| Apr 5, 1977 | F1 | Accomack | 2.0 | 0 |
| May 18, 1977 | F1 | Dickens | 2.0 | 0 |
| May 19, 1977 | F1 | Hall | 2.0 | 0 |
| May 20, 1977 | F1 | Terry | 2.0 | 0 |
| May 20, 1977 | F1 | Briscoe | 2.0 | 0 |
| May 20, 1977 | F1 | Donley | 2.0 | 0 |
| May 22, 1977 | F1 | Lipscomb | 2.0 | 0 |
| May 29, 1977 | F1 | Tom Green | 2.0 | 0 |
| May 31, 1977 | F1 | Dodge | 2.0 | 0 |
| May 4, 1977 | F1 | Swift | 2.0 | 0 |
| Jun 12, 1977 | F1 | Washita | 2.0 | 0 |
| Jun 20, 1977 | F1 | Fremont | 2.0 | 0 |
| Jun 20, 1977 | F1 | Jeff Davis | 2.0 | 0 |
| Jun 22, 1977 | F1 | Knox | 2.0 | 0 |
| Jun 30, 1977 | F1 | Medina | 2.0 | 0 |
| Jun 1, 1977 | F1 | Colfax | 2.0 | 0 |
| Jun 1, 1977 | F1 | El Paso | 2.0 | 0 |
| Jul 19, 1977 | F1 | Washtenaw | 2.0 | 0 |
| Jul 6, 1977 | F1 | Bradford | 2.0 | 0 |
| Aug 15, 1977 | F1 | Johnson | 2.0 | 0 |
| Sep 26, 1977 | F1 | Westchester | 2.0 | 0 |
| May 20, 1977 | F1 | Logan | 1.9 | 0 |
| May 5, 1977 | F1 | Shawnee | 1.9 | 0 |
| Jun 10, 1977 | F1 | Kossuth | 1.9 | 0 |
| Aug 31, 1977 | F1 | Iosco | 1.9 | 0 |
| Apr 2, 1977 | F1 | Greene | 1.8 | 0 |
| Jun 30, 1977 | F1 | DeKalb | 1.6 | 0 |
| Dec 5, 1977 | F1 | York | 1.5 | 0 |
| Mar 30, 1977 | F1 | Oceana | 1.5 | 0 |
| Apr 14, 1977 | F1 | Atascosa | 1.5 | 0 |
| Apr 16, 1977 | F1 | Dodge | 1.5 | 0 |
| Apr 2, 1977 | F1 | Cuyahoga | 1.5 | 0 |
| May 20, 1977 | F1 | Hockley | 1.5 | 0 |
| May 22, 1977 | F1 | Washtenaw | 1.5 | 0 |
| May 26, 1977 | F1 | Polk | 1.5 | 0 |
| May 1, 1977 | F1 | Columbia | 1.5 | 0 |
| May 1, 1977 | F1 | Bienville | 1.5 | 0 |
| May 5, 1977 | F1 | Edgecombe | 1.5 | 0 |
| May 8, 1977 | F1 | Laurens | 1.5 | 0 |
| Jul 6, 1977 | F1 | Sanilac | 1.5 | 0 |
| Jul 8, 1977 | F1 | Arenac | 1.5 | 0 |
| Jul 9, 1977 | F1 | Lincoln | 1.5 | 0 |
| Aug 22, 1977 | F1 | Luce | 1.5 | 0 |
| Aug 8, 1977 | F1 | Osceola | 1.5 | 0 |
| Mar 28, 1977 | F1 | Chicot | 1.3 | 0 |
| May 15, 1977 | F1 | McHenry | 1.3 | 0 |
| May 3, 1977 | F1 | Cheyenne | 1.3 | 0 |
| Jun 30, 1977 | F1 | Lake | 1.3 | 0 |
| Jun 9, 1977 | F1 | Carteret | 1.3 | 0 |
| Aug 6, 1977 | F1 | Sangamon | 1.3 | 0 |
| Mar 4, 1977 | F1 | Lancaster | 1.1 | 0 |
| Oct 1, 1977 | F1 | Wayne | 1.0 | 0 |
| Dec 5, 1977 | F1 | Pickens | 1.0 | 0 |
| Mar 13, 1977 | F1 | Kent | 1.0 | 0 |
| Mar 17, 1977 | F1 | Payne | 1.0 | 0 |
| Mar 25, 1977 | F1 | Maricopa | 1.0 | 0 |
| Mar 30, 1977 | F1 | Westmoreland | 1.0 | 0 |
| Mar 2, 1977 | F1 | Ellis | 1.0 | 0 |
| Apr 19, 1977 | F1 | Rapides | 1.0 | 0 |
| May 14, 1977 | F1 | Dallam | 1.0 | 0 |
| May 14, 1977 | F1 | Carson | 1.0 | 0 |
| May 17, 1977 | F1 | Hutchinson | 1.0 | 0 |
| May 17, 1977 | F1 | Carson | 1.0 | 0 |
| May 17, 1977 | F1 | Hale | 1.0 | 0 |
| May 17, 1977 | F1 | Armstrong | 1.0 | 0 |
| May 18, 1977 | F1 | Calhoun | 1.0 | 0 |
| May 19, 1977 | F1 | Garvin | 1.0 | 0 |
| May 20, 1977 | F1 | Hale | 1.0 | 0 |
| May 21, 1977 | F1 | Harrison | 1.0 | 0 |
| May 3, 1977 | F1 | Crosby | 1.0 | 0 |
| May 4, 1977 | F1 | Pocahontas | 1.0 | 0 |
| May 4, 1977 | F1 | Guthrie | 1.0 | 0 |
| May 4, 1977 | F1 | Tama | 1.0 | 0 |
| May 4, 1977 | F1 | Carroll | 1.0 | 0 |
| Jun 16, 1977 | F1 | Woodbury | 1.0 | 0 |
| Jun 16, 1977 | F1 | Woodbury | 1.0 | 0 |
| Jun 18, 1977 | F1 | Cherokee | 1.0 | 0 |
| Jun 19, 1977 | F1 | Williamsburg | 1.0 | 0 |
| Jun 19, 1977 | F1 | Tattnall | 1.0 | 0 |
| Jun 23, 1977 | F1 | Lowndes | 1.0 | 0 |
| Jun 30, 1977 | F1 | Cook | 1.0 | 0 |
| Jun 30, 1977 | F1 | Henry | 1.0 | 0 |
| Jun 30, 1977 | F1 | Anderson | 1.0 | 0 |
| Jun 1, 1977 | F1 | Northampton | 1.0 | 0 |
| Jun 6, 1977 | F1 | Phillips | 1.0 | 0 |
| Jul 12, 1977 | F1 | Cumberland | 1.0 | 0 |
| Jul 13, 1977 | F1 | Laurens | 1.0 | 0 |
| Jul 15, 1977 | F1 | Manatee | 1.0 | 0 |
| Jul 1, 1977 | F1 | Gilmer | 1.0 | 0 |
| Jul 6, 1977 | F1 | Bradford | 1.0 | 0 |
| Jul 7, 1977 | F1 | Plymouth | 1.0 | 0 |
| Aug 10, 1977 | F1 | Bradford | 1.0 | 0 |
| Aug 10, 1977 | F1 | El Paso | 1.0 | 0 |
| Aug 10, 1977 | F1 | New Castle | 1.0 | 0 |
| Aug 14, 1977 | F1 | Adams | 1.0 | 0 |
| Aug 14, 1977 | F1 | Adams | 1.0 | 0 |
| Aug 14, 1977 | F1 | Adams | 1.0 | 0 |
| Aug 23, 1977 | F1 | Garfield | 1.0 | 0 |
| Aug 2, 1977 | F1 | Henry | 1.0 | 0 |
| Aug 6, 1977 | F1 | Sangamon | 1.0 | 0 |
| Sep 23, 1977 | F1 | Audubon | 1.0 | 0 |
| Sep 24, 1977 | F1 | Hinds | 1.0 | 0 |
| Sep 7, 1977 | F1 | Lumpkin | 1.0 | 0 |
| Sep 7, 1977 | F1 | Stephens | 1.0 | 0 |
| Apr 19, 1977 | F1 | Union | 0.8 | 0 |
| Apr 4, 1977 | F1 | Todd | 0.8 | 0 |
| Jun 18, 1977 | F1 | Tompkins | 0.8 | 0 |
| Jun 30, 1977 | F1 | Erie | 0.8 | 0 |
| Dec 5, 1977 | F1 | Dinwiddie | 0.7 | 0 |
| Oct 1, 1977 | F1 | Hamilton | 0.5 | 0 |
| Oct 1, 1977 | F1 | Adams | 0.5 | 0 |
| Dec 13, 1977 | F1 | Wharton | 0.5 | 0 |
| Dec 13, 1977 | F1 | Washington | 0.5 | 0 |
| Feb 23, 1977 | F1 | Hinds | 0.5 | 0 |
| Feb 24, 1977 | F1 | Marion | 0.5 | 0 |
| Mar 11, 1977 | F1 | Allen | 0.5 | 0 |
| Mar 30, 1977 | F1 | Geauga | 0.5 | 0 |
| Mar 4, 1977 | F1 | Johnston | 0.5 | 0 |
| Apr 11, 1977 | F1 | Keith | 0.5 | 0 |
| Apr 13, 1977 | F1 | Comal | 0.5 | 0 |
| Apr 16, 1977 | F1 | Cameron | 0.5 | 0 |
| Apr 18, 1977 | F1 | Stephens | 0.5 | 0 |
| Apr 19, 1977 | F1 | Hall | 0.5 | 0 |
| Apr 4, 1977 | F1 | Madison | 0.5 | 0 |
| May 18, 1977 | F1 | Arthur | 0.5 | 0 |
| May 18, 1977 | F1 | Dickens | 0.5 | 0 |
| May 18, 1977 | F1 | Antelope | 0.5 | 0 |
| May 19, 1977 | F1 | Hall | 0.5 | 0 |
| May 20, 1977 | F1 | Howard | 0.5 | 0 |
| May 2, 1977 | F1 | Phelps | 0.5 | 0 |
| May 3, 1977 | F1 | Bailey | 0.5 | 0 |
| May 4, 1977 | F1 | Saunders | 0.5 | 0 |
| May 4, 1977 | F1 | Jasper | 0.5 | 0 |
| May 5, 1977 | F1 | Person | 0.5 | 0 |
| May 5, 1977 | F1 | Stephens | 0.5 | 0 |
| Jun 11, 1977 | F1 | Finney | 0.5 | 0 |
| Jun 14, 1977 | F1 | Scotts Bluff | 0.5 | 0 |
| Jun 30, 1977 | F1 | Huron | 0.5 | 0 |
| Jun 30, 1977 | F1 | Coshocton | 0.5 | 0 |
| Jul 10, 1977 | F1 | Plymouth | 0.5 | 0 |
| Jul 13, 1977 | F1 | Panola | 0.5 | 0 |
| Jul 13, 1977 | F1 | Kittson | 0.5 | 0 |
| Jul 26, 1977 | F1 | Pontotoc | 0.5 | 0 |
| Jul 4, 1977 | F1 | Clay | 0.5 | 0 |
| Jul 6, 1977 | F1 | Grundy | 0.5 | 0 |
| Aug 15, 1977 | F1 | Johnson | 0.5 | 0 |
| Aug 16, 1977 | F1 | Muscatine | 0.5 | 0 |
| Aug 16, 1977 | F1 | Christian | 0.5 | 0 |
| Aug 1, 1977 | F1 | Louisa | 0.5 | 0 |
| Sep 17, 1977 | F1 | Clinton | 0.5 | 0 |
| Sep 1, 1977 | F1 | Franklin | 0.5 | 0 |
| Sep 1, 1977 | F1 | Hall | 0.5 | 0 |
| Jun 30, 1977 | F1 | Will | 0.4 | 0 |
| Oct 2, 1977 | F1 | Virginia Beach city | 0.3 | 0 |
| Nov 5, 1977 | F1 | Stephens | 0.3 | 0 |
| Feb 23, 1977 | F1 | Okaloosa | 0.3 | 0 |
| May 14, 1977 | F1 | Box Butte | 0.3 | 0 |
| May 18, 1977 | F1 | Grant | 0.3 | 0 |
| May 4, 1977 | F1 | Allen | 0.3 | 0 |
| Jun 19, 1977 | F1 | Richland | 0.3 | 0 |
| Jun 6, 1977 | F1 | Norfolk city | 0.3 | 0 |
| Aug 14, 1977 | F1 | Hancock | 0.3 | 0 |
| Sep 7, 1977 | F1 | Spartanburg | 0.3 | 0 |
| Oct 8, 1977 | F1 | Jackson | 0.2 | 0 |
| Nov 21, 1977 | F1 | Gibson | 0.2 | 0 |
| Nov 30, 1977 | F1 | Mobile | 0.2 | 0 |
| Dec 5, 1977 | F1 | Spartanburg | 0.2 | 0 |
| Dec 5, 1977 | F1 | Cherokee | 0.2 | 0 |
| Jan 10, 1977 | F1 | Osceola | 0.2 | 0 |
| Mar 4, 1977 | F1 | Wayne | 0.2 | 0 |
| Mar 4, 1977 | F1 | Wayne | 0.2 | 0 |
| May 14, 1977 | F1 | Kimball | 0.2 | 0 |
| May 18, 1977 | F1 | Lincoln | 0.2 | 0 |
| May 18, 1977 | F1 | Dawson | 0.2 | 0 |
| May 26, 1977 | F1 | Saunders | 0.2 | 0 |
| Jun 27, 1977 | F1 | Houston | 0.2 | 0 |
| Jun 30, 1977 | F1 | Montgomery | 0.2 | 0 |
| Jul 19, 1977 | F1 | Wilkin | 0.2 | 0 |
| Jul 19, 1977 | F1 | Orange | 0.2 | 0 |
| Jul 8, 1977 | F1 | Caroline | 0.2 | 0 |
| Aug 15, 1977 | F1 | Iowa | 0.2 | 0 |
| Aug 17, 1977 | F1 | Cecil | 0.2 | 0 |
| Aug 22, 1977 | F1 | Navarro | 0.2 | 0 |
| Aug 8, 1977 | F1 | Pueblo | 0.2 | 0 |
| Sep 16, 1977 | F1 | Mecklenburg | 0.2 | 0 |
| Sep 5, 1977 | F1 | Livingston | 0.2 | 0 |
| Sep 6, 1977 | F1 | Tuscaloosa | 0.2 | 0 |
| Sep 7, 1977 | F1 | Tazewell | 0.2 | 0 |
| Nov 29, 1977 | F1 | Cameron | 0.1 | 0 |
| Nov 1, 1977 | F1 | Bexar | 0.1 | 0 |
| Nov 1, 1977 | F1 | Terrebonne | 0.1 | 0 |
| Nov 8, 1977 | F1 | Waller | 0.1 | 0 |
| Nov 8, 1977 | F1 | Terrebonne | 0.1 | 0 |
| Dec 16, 1977 | F1 | Upshur | 0.1 | 0 |
| Dec 16, 1977 | F1 | Cleburne | 0.1 | 0 |
| Dec 4, 1977 | F1 | Carroll | 0.1 | 0 |
| Jan 3, 1977 | F1 | Santa Barbara | 0.1 | 0 |
| Jan 9, 1977 | F1 | Madison | 0.1 | 0 |
| Feb 23, 1977 | F1 | Cerro Gordo | 0.1 | 0 |
| Feb 24, 1977 | F1 | Clarendon | 0.1 | 0 |
| Feb 24, 1977 | F1 | Aiken | 0.1 | 0 |
| Mar 11, 1977 | F1 | Ouachita | 0.1 | 0 |
| Mar 18, 1977 | F1 | Washington | 0.1 | 0 |
| Mar 28, 1977 | F1 | St. Martin | 0.1 | 0 |
| Mar 28, 1977 | F1 | St. Landry | 0.1 | 0 |
| Mar 28, 1977 | F1 | Wapello | 0.1 | 0 |
| Mar 3, 1977 | F1 | Henderson | 0.1 | 0 |
| Apr 18, 1977 | F1 | Hunt | 0.1 | 0 |
| Apr 18, 1977 | F1 | Hunt | 0.1 | 0 |
| Apr 18, 1977 | F1 | Hunt | 0.1 | 0 |
| Apr 18, 1977 | F1 | Hunt | 0.1 | 0 |
| Apr 19, 1977 | F1 | Midland | 0.1 | 0 |
| Apr 19, 1977 | F1 | Yoakum | 0.1 | 0 |
| Apr 19, 1977 | F1 | Yoakum | 0.1 | 0 |
| Apr 21, 1977 | F1 | Cameron | 0.1 | 0 |
| Apr 2, 1977 | F1 | Hinds | 0.1 | 0 |
| Apr 4, 1977 | F1 | Rankin | 0.1 | 0 |
| May 10, 1977 | F1 | Judith Basin | 0.1 | 0 |
| May 10, 1977 | F1 | Judith Basin | 0.1 | 0 |
| May 11, 1977 | F1 | Bandera | 0.1 | 0 |
| May 16, 1977 | F1 | Bennett | 0.1 | 0 |
| May 18, 1977 | F1 | Furnas | 0.1 | 0 |
| May 18, 1977 | F1 | Dewey | 0.1 | 0 |
| May 19, 1977 | F1 | Garvin | 0.1 | 0 |
| May 19, 1977 | F1 | Muskogee | 0.1 | 0 |
| May 20, 1977 | F1 | Hitchcock | 0.1 | 0 |
| May 20, 1977 | F1 | Grant | 0.1 | 0 |
| May 20, 1977 | F1 | Wichita | 0.1 | 0 |
| May 20, 1977 | F1 | Taylor | 0.1 | 0 |
| May 21, 1977 | F1 | Deuel | 0.1 | 0 |
| May 21, 1977 | F1 | Grant | 0.1 | 0 |
| May 22, 1977 | F1 | Webb | 0.1 | 0 |
| May 22, 1977 | F1 | Webb | 0.1 | 0 |
| May 23, 1977 | F1 | McLeod | 0.1 | 0 |
| May 24, 1977 | F1 | Liberty | 0.1 | 0 |
| May 26, 1977 | F1 | Custer | 0.1 | 0 |
| May 26, 1977 | F1 | Geneva | 0.1 | 0 |
| May 28, 1977 | F1 | Major | 0.1 | 0 |
| May 29, 1977 | F1 | Marion | 0.1 | 0 |
| May 30, 1977 | F1 | Cheyenne | 0.1 | 0 |
| May 30, 1977 | F1 | Cheyenne | 0.1 | 0 |
| May 30, 1977 | F1 | Kandiyohi | 0.1 | 0 |
| May 31, 1977 | F1 | Columbia | 0.1 | 0 |
| May 1, 1977 | F1 | Weld | 0.1 | 0 |
| May 1, 1977 | F1 | Prowers | 0.1 | 0 |
| May 1, 1977 | F1 | Prowers | 0.1 | 0 |
| May 1, 1977 | F1 | Prowers | 0.1 | 0 |
| May 2, 1977 | F1 | Coryell | 0.1 | 0 |
| May 4, 1977 | F1 | Saline | 0.1 | 0 |
| May 4, 1977 | F1 | Henry, Louisa | 0.1 | 0 |
| May 4, 1977 | F1 | Boone | 0.1 | 0 |
| May 5, 1977 | F1 | Hardeman | 0.1 | 0 |
| May 5, 1977 | F1 | Hardeman | 0.1 | 0 |
| May 8, 1977 | F1 | Los Angeles | 0.1 | 0 |
| May 8, 1977 | F1 | Gregg | 0.1 | 0 |
| May 9, 1977 | F1 | Hood | 0.1 | 0 |
| May 9, 1977 | F1 | Converse | 0.1 | 0 |
| Jun 11, 1977 | F1 | Elko | 0.1 | 0 |
| Jun 12, 1977 | F1 | Hopkins | 0.1 | 0 |
| Jun 14, 1977 | F1 | Fallon | 0.1 | 0 |
| Jun 14, 1977 | F1 | Curry | 0.1 | 0 |
| Jun 17, 1977 | F1 | Putnam | 0.1 | 0 |
| Jun 18, 1977 | F1 | Laramie | 0.1 | 0 |
| Jun 20, 1977 | F1 | Johnson | 0.1 | 0 |
| Jun 20, 1977 | F1 | Platte | 0.1 | 0 |
| Jun 20, 1977 | F1 | Platte | 0.1 | 0 |
| Jun 20, 1977 | F1 | Converse | 0.1 | 0 |
| Jun 20, 1977 | F1 | Goshen | 0.1 | 0 |
| Jun 22, 1977 | F1 | Laramie | 0.1 | 0 |
| Jun 25, 1977 | F1 | Campbell | 0.1 | 0 |
| Jun 26, 1977 | F1 | Foster | 0.1 | 0 |
| Jun 27, 1977 | F1 | Nelson | 0.1 | 0 |
| Jun 27, 1977 | F1 | Cass | 0.1 | 0 |
| Jun 29, 1977 | F1 | Hampden | 0.1 | 0 |
| Jun 30, 1977 | F1 | Gibson | 0.1 | 0 |
| Jun 1, 1977 | F1 | Glacier | 0.1 | 0 |
| Jun 1, 1977 | F1 | Cascade | 0.1 | 0 |
| Jun 5, 1977 | F1 | Albany | 0.1 | 0 |
| Jul 10, 1977 | F1 | McPherson | 0.1 | 0 |
| Jul 10, 1977 | F1 | Clark | 0.1 | 0 |
| Jul 13, 1977 | F1 | Polk | 0.1 | 0 |
| Jul 21, 1977 | F1 | Alamance | 0.1 | 0 |
| Jul 23, 1977 | F1 | Cherry | 0.1 | 0 |
| Jul 24, 1977 | F1 | Dodge | 0.1 | 0 |
| Jul 26, 1977 | F1 | Butte | 0.1 | 0 |
| Jul 27, 1977 | F1 | Chatham | 0.1 | 0 |
| Jul 30, 1977 | F1 | Thurston | 0.1 | 0 |
| Aug 12, 1977 | F1 | Caroline | 0.1 | 0 |
| Aug 15, 1977 | F1 | Lancaster | 0.1 | 0 |
| Aug 20, 1977 | F1 | Washington | 0.1 | 0 |
| Aug 22, 1977 | F1 | Barnstable | 0.1 | 0 |
| Aug 24, 1977 | F1 | Morrill | 0.1 | 0 |
| Aug 26, 1977 | F1 | Richland | 0.1 | 0 |
| Aug 1, 1977 | F1 | Hancock | 0.1 | 0 |
| Aug 3, 1977 | F1 | Thayer | 0.1 | 0 |
| Aug 5, 1977 | F1 | Chippewa | 0.1 | 0 |
| Aug 6, 1977 | F1 | Chippewa | 0.1 | 0 |
| Sep 10, 1977 | F1 | Concho | 0.1 | 0 |
| Sep 13, 1977 | F1 | Johnson | 0.1 | 0 |
| Sep 13, 1977 | F1 | Bosque | 0.1 | 0 |
| Sep 13, 1977 | F1 | Perry | 0.1 | 0 |
| Sep 24, 1977 | F1 | Erie | 0.1 | 0 |
| Sep 24, 1977 | F1 | Mercer | 0.1 | 0 |
| Sep 24, 1977 | F1 | Venango | 0.1 | 0 |
| Sep 5, 1977 | F1 | Tangipahoa | 0.1 | 0 |
| Sep 5, 1977 | F1 | Tangipahoa | 0.1 | 0 |
| Sep 6, 1977 | F1 | Clarke | 0.1 | 0 |
| Sep 6, 1977 | F1 | Wilcox | 0.1 | 0 |
| Sep 7, 1977 | F1 | Cook | 0.1 | 0 |
| Sep 7, 1977 | F1 | Collin | 0.1 | 0 |
| Sep 7, 1977 | F1 | Bee | 0.1 | 0 |
| May 17, 1977 | F0 | Stevens, Grant | 10.3 | 0 |
| Jun 6, 1977 | F0 | Lincoln | 9.2 | 0 |
| Oct 1, 1977 | F0 | Overton | 7.2 | 0 |
| Sep 12, 1977 | F0 | Wichita | 5.1 | 0 |
| Sep 25, 1977 | F0 | Cumberland | 5.1 | 0 |
| Jul 10, 1977 | F0 | Bennett | 4.1 | 0 |
| Jun 30, 1977 | F0 | LaSalle | 3.6 | 0 |
| Jun 30, 1977 | F0 | Kendall | 3.0 | 0 |
| May 19, 1977 | F0 | Cavalier | 2.7 | 0 |
| Oct 1, 1977 | F0 | Grainger | 2.0 | 0 |
| Mar 11, 1977 | F0 | Garland | 2.0 | 0 |
| Jun 30, 1977 | F0 | Jefferson | 2.0 | 0 |
| Jul 10, 1977 | F0 | Bennett | 1.9 | 0 |
| Aug 6, 1977 | F0 | Sangamon | 1.9 | 0 |
| Jun 30, 1977 | F0 | Kendall | 1.7 | 0 |
| Aug 6, 1977 | F0 | Christian | 1.1 | 0 |
| Nov 8, 1977 | F0 | Jackson | 1.0 | 0 |
| Apr 2, 1977 | F0 | Highland | 1.0 | 0 |
| Apr 2, 1977 | F0 | Brown | 1.0 | 0 |
| May 15, 1977 | F0 | Garvin | 1.0 | 0 |
| May 15, 1977 | F0 | Garvin | 1.0 | 0 |
| May 18, 1977 | F0 | Crosby | 1.0 | 0 |
| May 18, 1977 | F0 | Crosby | 1.0 | 0 |
| May 18, 1977 | F0 | Crosby | 1.0 | 0 |
| May 20, 1977 | F0 | Wheeler | 1.0 | 0 |
| May 25, 1977 | F0 | Hansford | 1.0 | 0 |
| May 25, 1977 | F0 | Lamb | 1.0 | 0 |
| May 4, 1977 | F0 | Guthrie | 1.0 | 0 |
| May 7, 1977 | F0 | Wake | 1.0 | 0 |
| Jun 7, 1977 | F0 | Bremer | 1.0 | 0 |
| Aug 6, 1977 | F0 | Sangamon | 0.8 | 0 |
| Aug 6, 1977 | F0 | Sangamon | 0.8 | 0 |
| Jun 22, 1977 | F0 | Brown | 0.6 | 0 |
| Aug 6, 1977 | F0 | Sangamon | 0.6 | 0 |
| Nov 17, 1977 | F0 | Martin | 0.5 | 0 |
| Mar 11, 1977 | F0 | Conway | 0.5 | 0 |
| Mar 11, 1977 | F0 | Prairie | 0.5 | 0 |
| Mar 4, 1977 | F0 | Robeson | 0.5 | 0 |
| Apr 20, 1977 | F0 | Pender | 0.5 | 0 |
| May 17, 1977 | F0 | Gray | 0.5 | 0 |
| May 18, 1977 | F0 | Crosby | 0.5 | 0 |
| May 26, 1977 | F0 | Midland | 0.5 | 0 |
| Jun 10, 1977 | F0 | Corson | 0.5 | 0 |
| Jun 13, 1977 | F0 | El Paso | 0.5 | 0 |
| Jun 19, 1977 | F0 | Sherman | 0.5 | 0 |
| Jun 27, 1977 | F0 | Onslow | 0.5 | 0 |
| Jun 30, 1977 | F0 | Ashland | 0.5 | 0 |
| Jul 10, 1977 | F0 | Cherry | 0.5 | 0 |
| Jul 11, 1977 | F0 | Collier | 0.5 | 0 |
| Jul 12, 1977 | F0 | Collier | 0.5 | 0 |
| Jul 19, 1977 | F0 | Yavapai | 0.5 | 0 |
| Jul 21, 1977 | F0 | DeSoto | 0.5 | 0 |
| Jul 24, 1977 | F0 | Ohio, Brooke | 0.5 | 0 |
| Jul 25, 1977 | F0 | Sherman | 0.5 | 0 |
| Jul 7, 1977 | F0 | Prowers | 0.5 | 0 |
| Jul 7, 1977 | F0 | Logan | 0.5 | 0 |
| Jul 9, 1977 | F0 | Caldwell | 0.5 | 0 |
| Aug 2, 1977 | F0 | Hansford | 0.5 | 0 |
| Sep 23, 1977 | F0 | Cherokee | 0.5 | 0 |
| Sep 29, 1977 | F0 | Hayes | 0.5 | 0 |
| Sep 1, 1977 | F0 | Berrien | 0.5 | 0 |
| Oct 8, 1977 | F0 | Wood | 0.4 | 0 |
| Oct 1, 1977 | F0 | Warren | 0.3 | 0 |
| Nov 4, 1977 | F0 | Stanly | 0.3 | 0 |
| Feb 24, 1977 | F0 | Osceola | 0.3 | 0 |
| May 21, 1977 | F0 | Posey | 0.3 | 0 |
| Aug 23, 1977 | F0 | Castro | 0.3 | 0 |
| Aug 24, 1977 | F0 | Ward | 0.3 | 0 |
| Oct 1, 1977 | F0 | Roane | 0.2 | 0 |
| Nov 30, 1977 | F0 | Cameron | 0.2 | 0 |
| Nov 1, 1977 | F0 | Columbia | 0.2 | 0 |
| Apr 12, 1977 | F0 | Wheeler | 0.2 | 0 |
| Apr 4, 1977 | F0 | Marion | 0.2 | 0 |
| May 16, 1977 | F0 | Buffalo | 0.2 | 0 |
| May 17, 1977 | F0 | Armstrong | 0.2 | 0 |
| May 18, 1977 | F0 | Hayes | 0.2 | 0 |
| May 18, 1977 | F0 | Buffalo | 0.2 | 0 |
| May 19, 1977 | F0 | Adams | 0.2 | 0 |
| May 19, 1977 | F0 | Hall | 0.2 | 0 |
| May 19, 1977 | F0 | Hall | 0.2 | 0 |
| May 21, 1977 | F0 | Boyd | 0.2 | 0 |
| May 29, 1977 | F0 | Kosciusko | 0.2 | 0 |
| May 4, 1977 | F0 | Stanton | 0.2 | 0 |
| May 5, 1977 | F0 | Starke | 0.2 | 0 |
| May 8, 1977 | F0 | Phillips | 0.2 | 0 |
| Jun 22, 1977 | F0 | Antelope | 0.2 | 0 |
| Jun 2, 1977 | F0 | Elbert | 0.2 | 0 |
| Jun 2, 1977 | F0 | Lincoln | 0.2 | 0 |
| Aug 15, 1977 | F0 | Monona | 0.2 | 0 |
| Aug 15, 1977 | F0 | Polk | 0.2 | 0 |
| Aug 18, 1977 | F0 | Lake | 0.2 | 0 |
| Aug 6, 1977 | F0 | Sangamon | 0.2 | 0 |
| Aug 6, 1977 | F0 | Sangamon | 0.2 | 0 |
| Oct 25, 1977 | F0 | Escambia | 0.1 | 0 |
| Oct 25, 1977 | F0 | Okaloosa | 0.1 | 0 |
| Oct 30, 1977 | F0 | Brevard | 0.1 | 0 |
| Nov 20, 1977 | F0 | Jackson | 0.1 | 0 |
| Nov 21, 1977 | F0 | Hardeman | 0.1 | 0 |
| Nov 21, 1977 | F0 | St. Mary | 0.1 | 0 |
| Nov 27, 1977 | F0 | Vermilion | 0.1 | 0 |
| Nov 8, 1977 | F0 | Harris | 0.1 | 0 |
| Dec 13, 1977 | F0 | Harris | 0.1 | 0 |
| Dec 25, 1977 | F0 | Okaloosa | 0.1 | 0 |
| Dec 4, 1977 | F0 | Weakley | 0.1 | 0 |
| Dec 6, 1977 | F0 | Lee | 0.1 | 0 |
| Jan 6, 1977 | F0 | Okaloosa | 0.1 | 0 |
| Feb 24, 1977 | F0 | Orange | 0.1 | 0 |
| Mar 3, 1977 | F0 | Lincoln | 0.1 | 0 |
| Mar 4, 1977 | F0 | Hamilton | 0.1 | 0 |
| Apr 14, 1977 | F0 | Reeves | 0.1 | 0 |
| Apr 14, 1977 | F0 | Ward | 0.1 | 0 |
| Apr 16, 1977 | F0 | Matagorda | 0.1 | 0 |
| Apr 16, 1977 | F0 | Waller | 0.1 | 0 |
| Apr 17, 1977 | F0 | Custer | 0.1 | 0 |
| Apr 18, 1977 | F0 | Grayson | 0.1 | 0 |
| Apr 18, 1977 | F0 | Fannin | 0.1 | 0 |
| Apr 19, 1977 | F0 | Ward | 0.1 | 0 |
| Apr 19, 1977 | F0 | Ward | 0.1 | 0 |
| Apr 19, 1977 | F0 | Yoakum | 0.1 | 0 |
| Apr 19, 1977 | F0 | Ector | 0.1 | 0 |
| Apr 19, 1977 | F0 | Donley | 0.1 | 0 |
| Apr 19, 1977 | F0 | Gaines | 0.1 | 0 |
| Apr 19, 1977 | F0 | Swisher | 0.1 | 0 |
| Apr 19, 1977 | F0 | Wichita | 0.1 | 0 |
| Apr 20, 1977 | F0 | Coleman | 0.1 | 0 |
| Apr 22, 1977 | F0 | Lonoke | 0.1 | 0 |
| May 13, 1977 | F0 | Mercer | 0.1 | 0 |
| May 13, 1977 | F0 | Williams | 0.1 | 0 |
| May 13, 1977 | F0 | Williams | 0.1 | 0 |
| May 16, 1977 | F0 | Delaware | 0.1 | 0 |
| May 16, 1977 | F0 | Miller | 0.1 | 0 |
| May 16, 1977 | F0 | Roger Mills | 0.1 | 0 |
| May 16, 1977 | F0 | Clinton | 0.1 | 0 |
| May 16, 1977 | F0 | Webster | 0.1 | 0 |
| May 16, 1977 | F0 | York | 0.1 | 0 |
| May 17, 1977 | F0 | McKenzie | 0.1 | 0 |
| May 18, 1977 | F0 | Ward | 0.1 | 0 |
| May 18, 1977 | F0 | Cavalier | 0.1 | 0 |
| May 18, 1977 | F0 | Corson | 0.1 | 0 |
| May 20, 1977 | F0 | Jackson | 0.1 | 0 |
| May 21, 1977 | F0 | Cleveland | 0.1 | 0 |
| May 21, 1977 | F0 | Buffalo | 0.1 | 0 |
| May 21, 1977 | F0 | Deuel | 0.1 | 0 |
| May 21, 1977 | F0 | Deuel | 0.1 | 0 |
| May 21, 1977 | F0 | Deuel | 0.1 | 0 |
| May 21, 1977 | F0 | Deuel | 0.1 | 0 |
| May 21, 1977 | F0 | Codington | 0.1 | 0 |
| May 21, 1977 | F0 | Codington | 0.1 | 0 |
| May 23, 1977 | F0 | Curry | 0.1 | 0 |
| May 23, 1977 | F0 | Curry | 0.1 | 0 |
| May 24, 1977 | F0 | Highlands | 0.1 | 0 |
| May 25, 1977 | F0 | Calcasieu | 0.1 | 0 |
| May 25, 1977 | F0 | Buffalo | 0.1 | 0 |
| May 25, 1977 | F0 | Custer | 0.1 | 0 |
| May 25, 1977 | F0 | Custer | 0.1 | 0 |
| May 27, 1977 | F0 | Brevard | 0.1 | 0 |
| May 27, 1977 | F0 | Brule | 0.1 | 0 |
| May 30, 1977 | F0 | Brookings | 0.1 | 0 |
| May 30, 1977 | F0 | Jackson | 0.1 | 0 |
| May 31, 1977 | F0 | Washington | 0.1 | 0 |
| May 2, 1977 | F0 | Washington | 0.1 | 0 |
| May 2, 1977 | F0 | Harris | 0.1 | 0 |
| May 5, 1977 | F0 | Martin | 0.1 | 0 |
| May 5, 1977 | F0 | Dickens | 0.1 | 0 |
| May 5, 1977 | F0 | Stonewall | 0.1 | 0 |
| May 8, 1977 | F0 | Monroe | 0.1 | 0 |
| Jun 12, 1977 | F0 | Johnson | 0.1 | 0 |
| Jun 12, 1977 | F0 | Benton | 0.1 | 0 |
| Jun 12, 1977 | F0 | Webster | 0.1 | 0 |
| Jun 15, 1977 | F0 | Putnam | 0.1 | 0 |
| Jun 16, 1977 | F0 | Pasco | 0.1 | 0 |
| Jun 18, 1977 | F0 | Miami-Dade | 0.1 | 0 |
| Jun 19, 1977 | F0 | Weld | 0.1 | 0 |
| Jun 20, 1977 | F0 | Washington | 0.1 | 0 |
| Jun 22, 1977 | F0 | Nassau | 0.1 | 0 |
| Jun 22, 1977 | F0 | McLean | 0.1 | 0 |
| Jun 25, 1977 | F0 | Pierce | 0.1 | 0 |
| Jun 26, 1977 | F0 | LaMoure | 0.1 | 0 |
| Jun 26, 1977 | F0 | Richland | 0.1 | 0 |
| Jun 27, 1977 | F0 | Barnes | 0.1 | 0 |
| Jun 29, 1977 | F0 | Renville | 0.1 | 0 |
| Jun 1, 1977 | F0 | Jackson | 0.1 | 0 |
| Jun 5, 1977 | F0 | Polk | 0.1 | 0 |
| Jun 6, 1977 | F0 | Highlands | 0.1 | 0 |
| Jun 6, 1977 | F0 | Acadia | 0.1 | 0 |
| Jul 10, 1977 | F0 | Ziebach | 0.1 | 0 |
| Jul 10, 1977 | F0 | Bennett | 0.1 | 0 |
| Jul 10, 1977 | F0 | Burke | 0.1 | 0 |
| Jul 10, 1977 | F0 | Brown | 0.1 | 0 |
| Jul 13, 1977 | F0 | Burke | 0.1 | 0 |
| Jul 13, 1977 | F0 | Cass | 0.1 | 0 |
| Jul 14, 1977 | F0 | Galveston | 0.1 | 0 |
| Jul 15, 1977 | F0 | Jackson | 0.1 | 0 |
| Jul 19, 1977 | F0 | Columbia | 0.1 | 0 |
| Jul 20, 1977 | F0 | Assumption | 0.1 | 0 |
| Jul 23, 1977 | F0 | Foster | 0.1 | 0 |
| Jul 25, 1977 | F0 | Arapahoe | 0.1 | 0 |
| Jul 25, 1977 | F0 | Monroe | 0.1 | 0 |
| Jul 27, 1977 | F0 | Panola | 0.1 | 0 |
| Jul 28, 1977 | F0 | LaMoure | 0.1 | 0 |
| Jul 28, 1977 | F0 | Wise | 0.1 | 0 |
| Jul 29, 1977 | F0 | Morton | 0.1 | 0 |
| Jul 1, 1977 | F0 | Lee | 0.1 | 0 |
| Jul 4, 1977 | F0 | Sioux | 0.1 | 0 |
| Jul 6, 1977 | F0 | Martin | 0.1 | 0 |
| Jul 7, 1977 | F0 | Pasco | 0.1 | 0 |
| Jul 7, 1977 | F0 | Allegheny | 0.1 | 0 |
| Aug 10, 1977 | F0 | Cumberland | 0.1 | 0 |
| Aug 12, 1977 | F0 | Hamilton | 0.1 | 0 |
| Aug 13, 1977 | F0 | Dodge | 0.1 | 0 |
| Aug 15, 1977 | F0 | Tate | 0.1 | 0 |
| Aug 19, 1977 | F0 | White Pine | 0.1 | 0 |
| Aug 19, 1977 | F0 | Yuma | 0.1 | 0 |
| Aug 30, 1977 | F0 | Buffalo | 0.1 | 0 |
| Aug 30, 1977 | F0 | Adams | 0.1 | 0 |
| Aug 1, 1977 | F0 | Brevard | 0.1 | 0 |
| Aug 4, 1977 | F0 | Milwaukee | 0.1 | 0 |
| Aug 5, 1977 | F0 | Hamilton | 0.1 | 0 |
| Aug 5, 1977 | F0 | Stevens | 0.1 | 0 |
| Aug 7, 1977 | F0 | Morrill | 0.1 | 0 |
| Aug 7, 1977 | F0 | Cheyenne | 0.1 | 0 |
| Aug 8, 1977 | F0 | Mercer | 0.1 | 0 |
| Sep 10, 1977 | F0 | Matagorda | 0.1 | 0 |
| Sep 11, 1977 | F0 | Harris | 0.1 | 0 |
| Sep 11, 1977 | F0 | Milam | 0.1 | 0 |
| Sep 13, 1977 | F0 | Lea | 0.1 | 0 |
| Sep 14, 1977 | F0 | St. Francis | 0.1 | 0 |
| Sep 14, 1977 | F0 | Craighead | 0.1 | 0 |
| Sep 19, 1977 | F0 | Calcasieu | 0.1 | 0 |
| Sep 21, 1977 | F0 | Seminole | 0.1 | 0 |
| Sep 21, 1977 | F0 | Niobrara | 0.1 | 0 |
| Sep 26, 1977 | F0 | Henderson | 0.1 | 0 |
| Sep 29, 1977 | F0 | Hayes | 0.1 | 0 |
| Sep 5, 1977 | F0 | East Baton Rouge | 0.1 | 0 |
| Sep 8, 1977 | F0 | Tangipahoa | 0.1 | 0 |
| Sep 9, 1977 | F0 | Douglas | 0.1 | 0 |
Tropical cyclones
Storms whose tracks came within 100 miles of a U.S. county.
| Babe | Category 1 | 9 |
Earthquakes
Magnitude 5 or more in the lower 48 and Hawaii, 6.5 or more in Alaska, strongest first.
| Nov 3, 1977 | 6.7 | near Adak, Alaska Aleutians West AK |
| Sep 4, 1977 | 6.6 | Rat Islands, Aleutian Islands, Alaska Aleutians West AK |
| Jun 5, 1977 | 5.3 | near Fern Forest, Hawaii Hawaii HI |
| Mar 11, 1977 | 5.2 | near Hebgen Lake Estates, Montana Madison MT |
| Sep 30, 1977 | 5.0 | near Altamont, Utah Duchesne UT |
Drought
On average 15% of lower-48 counties were in severe drought in 1977. The worst month was February 1977, with 23%.
Storm Prediction Center, National Hurricane Center HURDAT2, Monitoring Trends in Burn Severity, NOAA Storm Events Database, USGS Comprehensive Earthquake Catalog, NOAA nClimDiv Palmer Drought Severity Index. Damage is as reported at the time, not adjusted for inflation.