1940

5 tropical cyclones near the U.S., 19 notable earthquakes.

Tropical cyclones

Storms whose tracks came within 100 miles of a U.S. county.

Tropical cyclones near the U.S. in 1940
UnnamedCategory 236LA, TX
UnnamedCategory 251GA, SC
UnnamedCategory 21ME
UnnamedCategory 20—
UnnamedTropical storm16LA, TX

Earthquakes

Magnitude 5 or more in the lower 48 and Hawaii, 6.5 or more in Alaska, strongest first.

Notable earthquakes of 1940
Apr 15, 19407.0near Attu Station, Alaska Aleutians West AK18.6
Apr 15, 19407.0near Attu Station, Alaska Aleutians West AK18.6
May 18, 19406.9Imperial Valley, California Imperial CA3.7
Mar 27, 19406.6near Adak, Alaska Aleutians West AK31.1
Jun 16, 19406.4near Honomu, Hawaii Hawaii HI9.3
Dec 20, 19406.0near Shelter Cove, California Humboldt CA9.3
Jul 15, 19405.6near Laup?hoehoe, Hawaii Hawaii HI—
Sep 1, 19405.6near Hana, Hawaii Maui HI—
Dec 24, 19405.6near Tamworth, New Hampshire Carroll NH5.0
May 18, 19405.4near Imperial, CA Imperial CA3.7
May 17, 19405.3near Joshua Tree, CA San Bernardino CA3.7
Dec 20, 19405.3near Tamworth, New Hampshire Carroll NH6.2
May 17, 19405.2near Joshua Tree, CA San Bernardino CA3.7
May 18, 19405.2near Imperial, CA Imperial CA3.7
May 18, 19405.2near Imperial, CA Imperial CA3.7
May 18, 19405.2near Imperial, CA Imperial CA3.7
Oct 27, 19405.1Olympic Peninsula, Washington Mason WA—
Mar 10, 19405.0near Alamo, Nevada Lincoln NV9.9
Jun 4, 19405.0near Pine Valley, CA San Diego CA3.7

Drought

On average 19% of lower-48 counties were in severe drought in 1940. The worst month was January 1940, with 38%.

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.

Drought · 1940

How the 1940 drought spread

Every county’s Palmer reading, month by month, from July 1939 to December 1940.

About this replay
Month—Historical replay — monthly readings
Severe or worse—of counties
Extreme—of counties
Hardest-hit state—