Wind gusting to 78 mph blew down trees, tore off roof shingles, toppled a billboard, and dislodged a roof in the Lander Foothills. e.
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 episode as NWS RIW wrote it up.
Wind gusting to 78 mph blew down trees, tore off roof shingles, toppled a billboard, and dislodged a roof in the Lander Foothills. The high winds were generated by a strong low pressure and intense mountain-top inversion (i.e. mountain wave).
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 Apr 14, 1:13 AM MST, 1 hour 47 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE RIVERTON WY 213 AM MDT THU APR 14 2005 .SHORT TERM...TODAY THROUGH SATURDAY NIGHT... ETA AND THE GFS INITIALIZED THE VIGOROUS VORT MAX FAIRLY WELL OVER SOUTH CENTRAL IDAHO. THIS SHORTWAVE WILL TRACK RAPIDLY NORTHEAST ACROSS MONTANA CLIPPING NORTHWEST WY BY 12Z THIS MORNING. AN ASSOCIATED SHRINKING SWATH OF SNOWFALL WAS NOTED OVER EASTERN IDAHO WITH THE LEADING EDGE NOW PUNCHING INTO THE TETONS. THIS AREA OF SNOWFALL APPEARS TO MATCH UP WITH A STRONG BULLS EYE OF Q VECTOR FORCING WHICH IS PROGGED TO EXIT TO THE NORTH ACROSS MT BEFORE 12Z THIS MORNING. BECAUSE OF THIS EXPECT MOST OF THE SIGNIFICANT SNOWFALL TO BE OVER-WITH BY 15Z THIS MORNING...IF NOT EARLIER. THE TETONS SHOULD WITNESS THE MOST SNOWFALL FROM THIS SYSTEM AS ONLY THE EXTREME WESTERN SLIVER OF WYOMING WILL BE IN THE SIGNIFICANT Q VECTOR FIELD. UP TO 4 INCHES OF SNOWFALL IS LIKELY IN THE TETONS EARLY THIS MORNING WITH LESS ELSEWHERE. SNOWFALL WILL TAPER OFF THIS AFTERNOON IN THE NORTHWEST AS STRONG NVA KICKS IN AND FLOW GRADUALLY BECOMES MORE DIFFLUENT. HOWEVER KEPT A SMALL CHANCE OF SNOW SHOWERS IN NORTHWEST WY THROUGH THIS AFTERNOON WITH NEGATIVE LIFTED INDICES RESPONDING TO THE COLD POOL ALOFT. THE BIG HORN MTS WILL SEE SOME LIGHT SNOW AS WELL TODAY AS THIS WEATHER SYSTEM TRACKS NORTHEAST. A FLAT RIDGE WILL BUILD INTO THE AREA FRIDAY ALONG WITH WARMING AIR ADVECTING BACK INTO THE REGION FROM THE SOUTHWEST AS JET SHIFTS NORTH OF THE AREA. TEMPS WILL CONTINUE TO WARM THROUGH SATURDAY WITH HIGH TEMPS RECOVERING BACK UP INTO THE 70S EAST OF THE DIVIDE. && .LONG TERM...SUNDAY THROUGH THURSDAY... MEDIUM RANGE GUIDANCE IN GENERAL AGREEMENT THIS FORECAST PERIOD. NEXT TROUGH BEGINS TO DIG INTO THE PACIFIC NORTHWEST SUNDAY WITH WARM AND MOSTLY DRY CONDITIONS PERSISTING INTO WY AHEAD OF SYSTEM. LATE SUNDAY INTO SUNDAY NIGHT....CONTINUED TREND WITH INCREASING PRECIP CHANCES IN THE FAR WEST. MODELS ADVERTISING A SECONDARY IMPULSE DROPPING INTO BASE OF TROUGH TO OUR SOUTHWEST LATE MONDAY INTO TUESDAY. THIS WOULD HELP TO ENHANCE UPSLOPE AND PRECIP EAST OF DIVIDE AS FRONT DROPS THROUGH AREA. HAVENT JUMPED ON THIS SCENARIO TOO MUCH THIS FAR OUT. HAVE CONTINUED THE LOW CHANCES FOR PRECIP ALL AREAS AT THIS TIME. DRY CONDITIONS BEST BET FOR WED AND THURS WITH RIDGING ADVERTISED BEHIND THIS SYSTEM. AS FOR TEMPS...ONLY MINOR ADJUSTMENTS TO CURRENT FORECAST. WARMEST DAY SUNDAY...WITH GOOD COOL DOWN BEHIND FRONT FOR MONDAY INTO TUESDAY. && .RIW WATCHES/WARNINGS/ADVISORIES...NONE. && SHORT TERM...LIPSON LONG TERM...FRIEDERS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE RIVERTON WY 248 AM MDT THU APR 14 2005 WYZ001>020-022>030-151200- 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- 248 AM MDT THU APR 14 2005 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND CENTRAL WYOMING. .DAY ONE...TODAY AND TONIGHT A FAST MOVING WEATHER SYSTEM WILL BRING SOME ACCUMULATING SNOWS TO EXTREME WESTERN WYOMING EARLY THIS MORNING WITH UP TO 4 INCHES OF SNOWFALL EXPECTED OVER THE HIGHER TETON MOUNTAINS WITH LESSER AMOUNTS OVER SURROUNDING AREAS OF NORTHWEST WYOMING. TETON PASS WILL LIKELY SEE 1 TO 2 INCHES OF SNOWFALL THIS MORNING. IN THE WAKE OF THIS STORM MANY AREAS WILL EXPERIENCE WEST WINDS OF 20 TO 30 MPH WITH GUSTS OF UP TO 40 MPH COMMON. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THE NEXT WEATHER SYSTEM IS FORECAST TO MOVE INTO THE AREA MONDAY AND LAST THROUGH TUESDAY. THIS SYSTEM MAY BRING SHOWERS AND THUNDERSTORMS AS WELL AS MOUNTAIN RAIN AND SNOW. SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO REPORT WIND GUSTS IN EXCESS OF 40 MPH AS WELL AS ANY SNOW ACCUMULATIONS TO THE NATIONAL WEATHER SERVICE. TRIW
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 2005Every state in 2005This day in weather historyWarnings in Wyoming, April 2005
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: 5448484.