1 heavy snow, as filed by the National Weather Service.
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.
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.
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 Mar 13, 3:45 AM MST, 8 hours 15 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RIVERTON WY
345 AM MST WED MAR 13 2002
SNOW WINDING DOWN IN THE WEST AND DEVELOPING EAST OF THE CONTINENTAL
DIVIDE EARLY THIS MORNING. WILL SHIFT WINTER WEATHER ADVISORY FROM
WEST MOUNTAINS TO MOST OF THE CWFA EAST OF THE DIVIDE. SNOW IN FAR
NORTH TAPERED OFF QUICKLY SO WILL LET HEAVY SNOW WARNING CODY
FOOTHILLS AND NORTHERN BIGHORN BASIN EXPIRE. EXPECT 3 TO 6 INCHES
LOWER ELEVATIONS AND AROUND 8 INCHES IN MOUNTAIN AREAS THROUGH
TONIGHT. COORDINATION WITH BIL AND CYS INDICATE FORECAST AND
ADVISORY MESHES WELL. IN SHORT TERM MESOETA PICKED UP ON HEAVY
SNOW BAND EARLY AND ALSO HIT TREND FOR BAND TO QUICKLY FALL APART AS
PRECIP REDEVELOPED S WITH AREA OF STRONG FRONTOGENISIS. SNOW
DEVELOPED ACROSS NATRONA COUNTY AND THEN IN FREMONT AND SWEETWATER
COUNTIES. CUTTING TEMPS ABOUT 5 DEG F TODAY EAST AND CENTRAL WITH
SNOWFALL AND DENSE CLOUD COVER. REST OF FORECAST TREND LOOKS OK
WITH NOT MUCH ATTENTION TO LATER PERIODS WITH SHORT TERM SNOW EVENT
MAIN FOCUS. AVN AND MRF INTERESTING IN LATER PERIODS INDICATING
A COUPLE MORE WIDESPREAD SNOW EVENTS FOR WY NEXT 10 DAYS.
.RIW...WINTER WEATHER ADVISORY TODAY AND TONIGHT WY ZNS 08>15..
22>28.
C.BAKERThe national radar mosaic for the moment the first event began.
1 heavy snow. Local standard time, as filed.
Cold frontal passage and northeasterly upslope flow brought 5 to 7 inches of snow to Lander.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2002Every state in 2002This day in weather historyWarnings in Wyoming, March 2002
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: 5281372.