Winter Storm in Wyoming, November 20 to 21, 2019

Name: Winter Storm in Wyoming, November 20 to 21, 2019
Start: 2019-11-20T15:00
End: 2019-11-21T23:00
Location: Wyoming

November 20 to 21, 2019 · NWS RIW · 1 event in 1 county or zone

A strong cold front moved across western and central Wyoming. Snow accompanied the cold front and amounts generally remained light to moderate.

Where it happened

Every event with a place to put it; 1 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

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 1

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 strong cold front moved across western and central Wyoming. Snow accompanied the cold front and amounts generally remained light to moderate. However, a combination of blowing snow and strong winds caused numerous accidents along Interstate 80 to the east of Rock Springs that resulted in the closure of the road.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Riverton, WY wrote its last area forecast discussion before the first event at Nov 19, 3:38 PM MST, 23 hours 22 minutes earlier.

Area forecast discussion, Nov 19, 3:38 PM MST, 23 hours 22 minutes before

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The radar

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

Open the radar archive at this moment

Event by event

1 winter storm. Local standard time, as filed.

Winter Storm, East Sweetwater County

When: November 20, 3:00 PM MST to November 21, 11:00 PM MST
Where: East Sweetwater County forecast zone
Reported by: Department of Highways
Coordinates: 41.660, -108.879 (the zone’s center; the record gives no point)

What these are

Winter Storm: A storm that brought snow, sleet or freezing rain at warning levels, usually over several hours or days.

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

The same day elsewhere

Every storm in Wyoming in 2019 Every state in 2019 This day in weather history Warnings in Wyoming, November 2019

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: 861684.