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Reference

August 20

20 entries from the federal record fall on August 20, across every year it covers.

Tropical cyclones

Storms at their strongest near the U.S. on this date.

  1. 1886Unnamed storm, category 4 near Calhoun County, TX
  2. 1887Unnamed storm, category 3 near Dare County, NC
  3. 1976Dottie, tropical storm near St. Johns County, FL
  4. 1981Dennis, tropical storm near Virginia Beach city, VA

Tornadoes

Tornadoes rated F3/EF3 or stronger, or that killed, on this date.

  1. 1968F3, 1 mile path Hillsborough, NH
  2. 2019EF3, 5.4 mile path Warren, IA
  3. 1962F2, 0.5 mile path, 4 killed Cuyahoga, OH

Deadly and costly storms

  1. 2019Excessive Heat, 11 deaths Gila; La Paz; Maricopa; Pinal
  2. 2025Excessive Heat, 9 deaths Graham; Greenlee; Pima
  3. 2019Excessive Heat, 4 deaths Graham; Greenlee; Pima; Pinal

Earthquakes

Magnitude 5 or more in the lower 48 and Hawaii, 6.5 or more in Alaska, on this date (local time).

  1. 1924M5.0, near P?hala, Hawaii Hawaii County, HI
  2. 1927M5.3, near Trinidad, California Humboldt County, CA
  3. 1927M5.6, near Burnt Ranch, California Humboldt County, CA
  4. 1959M5.0, near Hebgen Lake Estates, Montana Beaverhead County, MT
  5. 1993M5.0, near Joshua Tree, California Riverside County, CA
  6. 1999M5.1, near Lima, Montana Beaverhead County, MT
  7. 2023M5.1, near Ojai, CA Ventura County, CA

Wildfires

Fires of 50,000 acres or more that began on this date.

  1. 1988Huck Fire, 123,340 acres WY
  2. 2012Cache Creek Fire, 75,463 acres ID, OR, WA
  3. 1992Fountain Fire, 62,301 acres CA