Heavy Snow in Wyoming, November 23 to 24, 2002

Name: Heavy Snow in Wyoming, November 23 to 24, 2002
Start: 2002-11-23T02:00
End: 2002-11-24T10:00
Location: Wyoming

November 23 to 24, 2002 · NWS RIW · 14 events in 14 counties and zones

A storm system brought heavy snow to much of central and western Wyoming. Snowfall amounts ranged from 6 to 9 inches in the lower elevations to 10 to 18 inches in the mountains.

Where it happened

Every event with a place to put it; 14 filed by county or forecast zone are drawn at its center, in a lighter ring. 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: 2
Property damage: None recorded
Crop damage: None recorded
Events: 14

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.

What happened

The episode as NWS RIW wrote it up.

A storm system brought heavy snow to much of central and western Wyoming. Snowfall amounts ranged from 6 to 9 inches in the lower elevations to 10 to 18 inches in the mountains. Also, two people were injured when icy conditions caused a van to slide of I-25 north of Casper.

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

14 heavy snow. Local standard time, as filed.

Heavy Snow, Yellowstone National Park

When: November 23, 2:00 AM MST to November 24, 10:00 AM MST
Where: Yellowstone National Park forecast zone
Reported by: TRAINED SPOTTER
Coordinates: 44.228, -110.089 (the zone’s center; the record gives no point)

Heavy Snow, Absaroka Mountains

When: November 23, 2:00 AM MST to November 24, 10:00 AM MST
Where: Absaroka Mountains forecast zone
Reported by: TRAINED SPOTTER
Coordinates: 43.760, -108.887 (the zone’s center; the record gives no point)

Heavy Snow, Southwest Big Horn Basin

When: November 23, 2:00 AM MST to November 24, 10:00 AM MST
Where: Southwest Big Horn Basin forecast zone
Reported by: TRAINED SPOTTER
Coordinates: 43.719, -108.442 (the zone’s center; the record gives no point)

Heavy Snow, Owl Creek & Bridger Mountains

When: November 23, 2:00 AM MST to November 24, 10:00 AM MST
Where: Owl Creek & Bridger Mountains forecast zone
Reported by: TRAINED SPOTTER
Coordinates: 43.241, -107.957 (the zone’s center; the record gives no point)

Heavy Snow, Bighorn Mountains West

When: November 23, 2:00 AM MST to November 24, 10:00 AM MST
Where: Bighorn Mountains West forecast zone
Reported by: TRAINED SPOTTER
Coordinates: 43.695, -107.538 (the zone’s center; the record gives no point)

Heavy Snow, Bighorn Mountains Southeast

When: November 23, 2:00 AM MST to November 24, 10:00 AM MST
Where: Bighorn Mountains Southeast forecast zone
Reported by: TRAINED SPOTTER
Coordinates: 43.635, -107.022 (the zone’s center; the record gives no point)

Heavy Snow, Northeast Johnson County

When: November 23, 2:00 AM MST to November 24, 10:00 AM MST
Where: Northeast Johnson County forecast zone
Reported by: TRAINED SPOTTER
Coordinates: 44.039, -106.585 (the zone’s center; the record gives no point)

Heavy Snow, Teton & Gros Ventre Mountains

When: November 23, 2:00 AM MST to November 24, 10:00 AM MST
Where: Teton & Gros Ventre Mountains forecast zone
Reported by: TRAINED SPOTTER
Coordinates: 43.002, -109.948 (the zone’s center; the record gives no point)

Heavy Snow, Wind River Mountains West

When: November 23, 2:00 AM MST to November 24, 10:00 AM MST
Where: Wind River Mountains West forecast zone
Injuries: 2 direct, 0 indirect
Reported by: TRAINED SPOTTER
Coordinates: 42.904, -109.273 (the zone’s center; the record gives no point)

Heavy Snow, Wind River Mountains East

When: November 23, 2:00 AM MST to November 24, 10:00 AM MST
Where: Wind River Mountains East forecast zone
Reported by: TRAINED SPOTTER
Coordinates: 42.904, -109.273 (the zone’s center; the record gives no point)

Heavy Snow, Wind River Basin

When: November 23, 2:00 AM MST to November 24, 10:00 AM MST
Where: Wind River Basin forecast zone
Reported by: TRAINED SPOTTER
Coordinates: 43.041, -108.630 (the zone’s center; the record gives no point)

Heavy Snow, Lander Foothills

When: November 23, 2:00 AM MST to November 24, 10:00 AM MST
Where: Lander Foothills forecast zone
Reported by: TRAINED SPOTTER
Coordinates: 43.041, -108.630 (the zone’s center; the record gives no point)

Heavy Snow, Natrona County Lower Elevations

When: November 23, 2:00 AM MST to November 24, 10:00 AM MST
Where: Natrona County Lower Elevations forecast zone
Reported by: NEWSPAPER
Coordinates: 42.962, -106.798 (the zone’s center; the record gives no point)

Heavy Snow, Upper Green River Basin Foothills

When: November 23, 2:00 AM MST to November 24, 10:00 AM MST
Where: Upper Green River Basin Foothills forecast zone
Reported by: TRAINED SPOTTER
Coordinates: 42.767, -109.915 (the zone’s center; the record gives no point)

What these are

Heavy Snow: Snowfall reaching the local warning threshold without the other hazards of a winter storm.

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

The same day elsewhere

Every storm in Wyoming in 2002 Every state in 2002 This day in weather history Warnings in Wyoming, November 2002

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 2026-10-01. Each event’s entry at NCEI: 5323834, 5323835, 5323836, 5323837, 5323838, 5323839, 5323840, 5323841, 5323842, 5323843, 5323844, 5323845, 5323846, 5323847.