Wyoming, 1999

Blizzard in Wyoming, March 5, 1999

March 5, 1999 · NWS BYZ · 2 events in 2 counties and zones

An upper low pressure system intensified as it crossed the Rockies during the evening of March 4 and hit some unstable air which was in place over South Central Montana and North Central Wyoming. This system produced heavy snowfall across portions of North Central Wyoming.

The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
2

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 BYZ wrote it up.

An upper low pressure system intensified as it crossed the Rockies during the evening of March 4 and hit some unstable air which was in place over South Central Montana and North Central Wyoming. This system produced heavy snowfall across portions of North Central Wyoming. This system also produced strong northwest winds as high as 40 mph across portions of Sheridan County which produced blizzard conditions. The Ranger Creek Ranger Station in the Big Horn Mountains received 18 inches of snowfall while Burgess Junction picked up 6 inches. Across the Sheridan Foothills, Big Horn and Story both received 9 inches of snowfall while Sheridan and Dayton received 5 inches.

Event by event

2 blizzard. Local standard time, as filed.

Blizzard, Northeast Big Horn Mountains

When
March 5, 3:00 AM MST to 2:00 PM MST
Where
Northeast Big Horn Mountains forecast zone
Reported by
TRAINED SPOTTER

Blizzard, Sheridan Foothills

When
March 5, 3:00 AM MST to 2:00 PM MST
Where
Sheridan Foothills forecast zone
Reported by
TRAINED SPOTTER

What these are

Blizzard
Sustained winds or frequent gusts of 35 mph or more with falling or blowing snow that cuts visibility below a quarter mile for three hours or longer.

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

The same day elsewhere

More

Every storm in Wyoming in 1999Every state in 1999This day in weather historyWarnings in Wyoming, March 1999

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: 5684024, 5684025.