Tornadoes and Hail in Wyoming, July 21, 1973

Name: Tornadoes and Hail in Wyoming, July 21, 1973
Start: 1973-07-21T18:00
End: 1973-07-21T18:30
Location: Wyoming

July 21, 1973 · 5 events in 4 counties and zones

3 hail, 2 tornado, as filed by the National Weather Service.

Where it happened

Every event with a place to put it. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

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The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 5

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

Event by event

3 hail, 2 tornado. Local standard time, as filed.

Tornado, Campbell

When: July 21, 6:00 PM CST
Where: Campbell County
Rating: F1
Path width: 33 yd
Coordinates: 44.220, -105.330

Tornado, Campbell

When: July 21, 6:00 PM CST
Where: Campbell County
Rating: F1
Path width: 33 yd
Coordinates: 44.300, -105.630

Hail, Natrona

When: July 21, 6:10 PM CST
Where: Natrona County
Measured: 0.75 in hail
Coordinates: 42.500, -106.700

Hail, Weston

When: July 21, 6:30 PM CST
Where: Weston County
Measured: 0.75 in hail
Coordinates: 43.700, -104.700

Hail, Niobrara

When: July 21, 6:30 PM CST
Where: Niobrara County
Measured: 0.75 in hail
Coordinates: 43.200, -104.400

What these are

Tornado: A violently rotating column of air in contact with the ground and extending from a thunderstorm, filed with its path, width and Fujita or Enhanced Fujita rating from the damage survey.
Hail: Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in Wyoming in 1973 Every state in 1973 This day in weather history The tornado archive for Wyoming, 1973

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 10162888, 10162889, 10162890, 10162891, 10162892.