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Analysis

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Reference

August 21

14 entries from the federal record fall on August 21, across every year it covers.

Tropical cyclones

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

  1. 1936Unnamed storm, tropical storm near Brevard County, FL

Tornadoes

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

  1. 1977F3, 26.9 mile path, 6 killed Shelby, IL; Cumberland, IL
  2. 1951F3, 0.1 mile path Middlesex, CT
  3. 1952F2, 1.3 mile path, 1 killed Pettis, MO

Deadly and costly storms

  1. 2021Flash Flood, 20 deaths, $101 million Dickson; Hickman; Houston; Humphreys
  2. 2008Tropical Storm, 6 deaths Alachua; Baker; Clay; Columbia

Earthquakes

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

  1. 1951M6.3, near Honaunau-Napoopoo, Hawaii Hawaii County, HI

Wildfires

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

  1. 2010Long Butte Fire, 302,474 acres ID
  2. 2024House Draw Fire, 167,888 acres WY
  3. 2006Columbia Complex, 118,790 acres WA
  4. 2020East Fork Fire, 106,356 acres UT
  5. 2008Dunn Mtn. Assist Fire, 105,537 acres MT
  6. 2006Pueblo Fire, 67,830 acres OR
  7. 2016Henrys Creek Fire, 52,960 acres ID