September 18
20 entries from the federal record fall on September 18, across every year it covers.
Tropical cyclones
Storms at their strongest near the U.S. on this date.
- 1854Unnamed storm, category 2 near Galveston County, TX
- 1863Unnamed storm, tropical storm near Onslow County, NC
- 1877Unnamed storm, category 1 near Plaquemines Parish, LA
- 1926Unnamed storm, category 4 near Miami-Dade County, FL
- 1936Unnamed storm, category 2 near Dare County, NC
- 1957Esther, tropical storm near Terrebonne Parish, LA
- 2003Isabel, category 2 near Dare County, NC
Tornadoes
Tornadoes rated F3/EF3 or stronger, or that killed, on this date.
- 1954F3, 0.1 mile path, 2 killed St. Lucie, FL
- 1997F3, 17 mile path, 1 killed Morrison, MN; Mille Lacs, MN
- 1986F3, 7 mile path Jewell, KS; Republic, KS; Nuckolls, NE
Deadly and costly storms
- 2003Hurricane (Typhoon), 4 deaths, $18.0 million Charles City; Greensville; New Kent; Prince George
- 2003Tropical Storm, 3 deaths, $45.1 million Amelia; Brunswick; Caroline; Chesterfield
- 2003Hurricane (Typhoon), 2 deaths, $639 million Accomack; Essex; Gloucester; Isle of Wight
- 2003Tropical Storm, 1 deaths, $1.1 billion Anne Arundel; Baltimore; Calvert; Charles
- 2003Tropical Storm, $125 million District of Columbia
- 2003Storm Surge/Tide, $98.0 million Caroline; Cecil; Kent; Queen Anne's
- 2004Flash Flood, $100 million Luzerne
Earthquakes
Magnitude 5 or more in the lower 48 and Hawaii, 6.5 or more in Alaska, on this date (local time).
- 1945M5.1, near Crescent Valley, Nevada Eureka County, NV
- 2004M5.4, near Benton, California Mono County, CA
- 2004M5.3, near Benton, California Mono County, CA