1 high wind, 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 18, 5:54 PM MST, 4 hours 6 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE RIVERTON WY 554 PM MST THU MAR 18 2004 .TONIGHT THROUGH SUNDAY... UPDATED TO CANCEL HIGH WIND WATCH FOR CODY FOOTHILLS AND ABSAROKA MOUNTAINS TONIGHT. LEE TROF SETTING UP THIS AFTERNOON ACROSS EASTERN WYOMING IN RESPONSE TO SHORTWAVE TROF APPROACHING FROM OVER SOUTHERN BRITISH COLUMBIA. THIS WAVE TO CONTINUE AN EASTWARD TRACK ACROSS SOUTHERN CANADA OVER THE 24 HOURS OR SO...THEN DIGGING INTO THE FAR NORTHERN PLAINS SATURDAY. ONLY CONCERN WITH THIS WILL BE HIGH WIND POTENTIAL AND WHAT TO DO WITH HIGH WIND WATCH FOR THE WIND CORRIDOR AND CODY FOOTHILLS/ABSAROKAS. TIGHT GRADIENT TO EXIST OVER THESE AREAS...ALL OTHER AREAS AS WELL FOR THAT MATTER. MESOETA HAS 50 KT WINDS TONIGHT AND TOMORROW MORNING OVER THE WIND CORRIDOR...WHILE AROUND 40KTS ACROSS THE NORTH. WILL ISSUE HIGH WIND WARNING FOR GREEN MTNS...NATRONA COUNTY AND CASPER MOUNTAIN ZONES. HOWEVER... FEEL THAT SHORTWAVE TOO FAR NORTH AND NOT DIGGING TOWARDS THE AREAS TO GIVE THE CODY FOOTHILLS HIGH WINDS. ALSO...NO EVIDENCE OF MTN TOP INVERSION THERE. HIGH WINDS MAY OCCUR AROUND CLARK...THOUGH NOT WIND SPREAD ENOUGH TO WARRANT A WARNING. AS FOR THE ABSAROKAS... ONLY EXPECT THE PEAKS TO BLOW HIGH WIND WITH THE REMAINDER BELOW HIGH WIND...AGAIN NOT WIDESPREAD ENOUGH FOR A WARNING. OTHERWISE H7 TEMPS WARMING TO AROUND +4C TONIGHT AND TOMORROW...SO WILL KEEP GOING FORECAST OF AROUND 70 CENTRAL...SLIGHTLY COOLER NORTH WHERE MORE CLOUDS WILL BE AS WILL A LATE INCOMING COLD FRONT. THIS COLD FRONT TO MOVE INTO THE NORTH FRIDAY NIGHT AND INTO THE CENTRAL BY SUNRISE SATURDAY MORNING. GFS SLOWER WITH THE FRONT...THOUGH THIS TIME OF YEAR A COLD FRONT USUALLY HAS NO PROBLEMS SLIDING IN. AT THIS POINT ONLY ANTICIPATE ONLY LOW CLOUDS MOVING INTO AREA AS 1040MB HIGH SLIDES INTO THE PLAINS STATES. H7 FLOW TOO STRONG FROM THE WEST FOR PRECIP TO FORM. LOW LEVEL NORTHEAST TO EAST SURFACE CONTINUES SUNDAY NIGHT AND PUSHES WEST OF THE DIVIDE INTO SWEETWATER AND THE GREEN RIVER BASIN. FLOW BACKS TO THE SOUTHWEST DURING THE DAY SUNDAY AS LEE TROF BEGINS TO BUILD IN. .SUNDAY NIGHT THROUGH THURSDAY... SAME CONCERN FOR SUNDAY WITH RESPECT TO CLOUDS AND ANY CHANCE OF LINGERING PCPN IN E ZONES SUN AM. DRY FORECAST FOR NOW. HAVE COOLED SOME HIGHS IN THE N AND E ZONES BUT THESE MAY NEED TO BE LOWERED MORE IF CLOUDS HOLD ALL DAY. UPPER RIDGE AXIS TO MOVE OVER WY MONDAY WITH DRY WX AND WARMER HIGHS. ANOTHER FRONT NEARS N WY BY 12Z TUE. SOME MOISTURE SHOWN NEAR BOUNDARY AND HAVE ADDED SOME LOW POPS IN NW MTNS FOR MON NT. W FLOW ALOFT WITH BOUNDARY ALONG N WY. AGAIN OPTED TO ADD LOW POPS NW MTNS. HAVE MESHED GRIDS FOR TUE NT IN THE FAR W ZONES AS UPPER LOW MOVES TOWARD PAC NW BY 12Z WED. WILL SEE HOW THIS LOOKS TONIGHT IN CASE MORE POPS ARE NEEDED. THEN GFS IDEA IS TO BRING THIS SYSTEM CLOSER WED AND INTO THE W U.S. THURS. HAVE TRENDED POPS UPWARD IN THE FAR WEST WED/WED NT AND THEN SPREAD POPS E ON THU AND THU NT. MADE SOME MINOR TEMP CHANGES TUE AND WED THEN COOLER HIGHS THURS. && .RIW WATCHES/WARNINGS/ADVISORIES...HIGH WIND WARNING TONIGHT THROUGH NOON FRIDAY ZONES 19..20..22. && TWB/AR/AEM
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE RIVERTON WY 600 PM MST THU MAR 18 2004 WYZ001>020-022>030-191200- ABSAROKA MOUNTAINS-BIGHORN MOUNTAINS SOUTHEAST- BIGHORN MOUNTAINS WEST-CASPER MOUNTAIN-CODY FOOTHILLS- EAST SWEETWATER COUNTY-FLAMING GORGE- GREEN MOUNTAINS AND RATTLESNAKE RANGE-JACKSON HOLE-LANDER FOOTHILLS- NATRONA COUNTY LOWER ELEVATIONS-NORTH BIG HORN BASIN- NORTHEAST JOHNSON COUNTY-OWL CREEK AND BRIDGER MOUNTAINS- ROCK SPRINGS AND GREEN RIVER-SALT RIVER AND WYOMING RANGES- SOUTH LINCOLN COUNTY-SOUTHEAST BIG HORN BASIN- SOUTHEAST JOHNSON COUNTY-SOUTHWEST BIG HORN BASIN-STAR VALLEY- TETON AND GROS VENTRE MOUNTAINS-UPPER GREEN RIVER BASIN- UPPER GREEN RIVER BASIN FOOTHILLS-UPPER WIND RIVER BASIN- WIND RIVER BASIN-WIND RIVER MOUNTAINS EAST-WIND RIVER MOUNTAINS WEST- YELLOWSTONE NATIONAL PARK- 600 PM MST THU MAR 18 2004 ...HIGH WIND WARNING 6 PM TONIGHT THROUGH NOON FRIDAY FOR PORTIONS OF CENTRAL WYOMING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND CENTRAL WYOMING. .DAY ONE...TONIGHT A STRONG STORM SYSTEM MOVING ACROSS SOUTHERN CANADA WILL BRING WINDY CONDITIONS TO WYOMING THROUGH FRIDAY. STRONG WINDS OF 35 TO 45 MPH WITH GUSTS NEAR 60 MPH ARE EXPECTED ACROSS PORTIONS OF CENTRAL WYOMING. THOSE TRAVELING IN CENTRAL WYOMING SHOULD ANTICIPATE HAZARDOUS CROSS WINDS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THE POTENTIAL FOR THESE HIGH WINDS WILL CONTINUE FROM SWEETWATER STATION EAST TO CASPER AND CASPER MOUNTAIN DURING THE DAY FRIDAY BEFORE A COLD FRONT MOVES IN AND TURNS THE WINDS LIGHT FROM THE NORTH. SOUTHWEST WINDS MAY CONTINUE AT 40 TO 60 MPH EXCEPT 50 TO 75 MPH AROUND CASPER MOUNTAIN. WINDS WILL DIMINISH RAPIDLY FRIDAY EVENING. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO REPORT SUSTAINED WINDS OF 40 MPH OR GREATER OR GUSTS OVER 60 MPH ACROSS THE LOWER ELEVATIONS OF NATRONA COUNTY AND SOUTHEAST FREMONT COUNTY TONIGHT OR 50 MPH WITH GUSTS TO 75 MPH ON CASPER MOUNTAIN. TWB/AEM
The national radar mosaic for the moment the first event began.
1 high wind. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2004Every state in 2004This day in weather historyWarnings in Wyoming, March 2004
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: 5383738.