A stationary front along the Laramie Range produced some isolated high winds.
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 CYS wrote it up.
A stationary front along the Laramie Range produced some isolated high winds.
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 Cheyenne, WY wrote its last area forecast discussion before the first event at Feb 26, 3:01 PM MST, 1 hour 25 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHEYENNE WY 301 PM MST SAT FEB 26 2011 .SHORT TERM...THE MAIN CONCERN WITH THIS FORECAST PACKAGE IS THE SNOW CHANCES TOMORROW AFTERNOON AND TOMORROW EVENING. TONIGHT: LATEST WATER VAPOR LOOP WAS SHOWING A FAIRLY POTENT POTENTIAL VORTICITY ANOMALY DIVING SOUTH INTO SOUTHERN CALIFORNIA. THIS FEATURE IS BRINGING DRIER AIR INTO THE AREA THIS AFTERNOON WITH A LIMITED AMOUNT OF SNOWFALL COVERAGE. THE ONLY EXCEPTION IS IN THE SNOWY AND SIERRA MADRE RANGES WHERE THE WEB CAMS ARE SHOWING SOME OROGRAPHIC EFFECTS. LATEST WATER VAPOR LOOP WAS ALSO SHOWING A POCKET OF DRIER AIR MOVING THROUGH THE AREA WHICH WILL CONTINUE TO PROVIDE GOOD SUBSIDENCE AND COULD CAUSE WIND SPEEDS TO EXCEED HIGH WIND WARNING CRITERIA IN BORDEAUX. AS A RESULT...WE WILL KEEP THE HIGH WIND WARNING POSTED UNTIL 5 PM. THE WIND HAS ALSO BEEN CRANKING AT ARLINGTON WHERE THE WEB CAMS ARE SHOWING BLOWING SNOW. AFTER SUNSET...WE WOULD ANTICIPATE THINGS TO SETTLE DOWN AS THE INVERSION SETS UP. AS THE EVENING WEARS ON...WE WOULD EXPECT THE MID AND UPPER LEVEL FLOW TO BECOME MORE WESTERLY WHICH IS ALREADY EVIDENT ON THE MDCRS PROFILERS IN THE WESTERN WYOMING IN IDAHO. THIS WILL CONTINUE TRIGGER SOME OROGRAPHIC SNOWS IN THE SIERRA MADRE AND SNOWY RANGES...BUT SNOWFALL AMOUNTS SHOULD GENERALLY RANGE 1 TO 2 INCHES. SUNDAY-MONDAY: THE MAIN CONCERN DURING THIS PERIOD WILL BE THE IMPACT OF THE POTENTIAL VORTICITY ANOMALY MOVING THROUGH ARIZONA AND NEW MEXICO. THIS FEATURE WILL HELP ENHANCE CYCLOGENISIS ACROSS SOUTHERN COLORADO TOMORROW AFTERNOON AND TOMORROW NIGHT WHICH MAY CAUSE THE BOUNDARY LAYER FLOW TO TURN NORTH/NORTHEAST ACROSS EXTREME EASTERN WYOMING AND THE NEBRASKA PANHANDLE. THIS WILL BRIEFLY PROVIDE SOME UPSLOPE COMPONENT SUNDAY AFTERNOON AND SUNDAY EVENING. THIS COMBINED WITH SOME LINGERING MID LEVEL MOISTURE MAY SUPPORT SOME LIGHT SNOW ACROSS PORTIONS OF WYOMING AND NEBRASKA PANHANDLE ESPECIALLY IN THE MORE FAVORED UPSLOPE AREAS OF THE LARAMIE PEAK AND LARAMIE RANGE. WE HAVE BUMPED UP POPS A BIT ACROSS THIS REGION...BUT SNOWFALL AMOUNTS SHOULD GENERALLY BE A HALF INCH OR LESS. OTHERWISE...TEMPERATURES WILL CONTINUE TO MODERATE AS DOWNSLOPE FLOW DOMINATES THE AREA. .LONG TERM... .LONG TERM...MONDAY NIGHT THROUGH SATURDAY... MEDIUM RANGE MODELS ARE IN GENERAL AGREEMENT EARLY IN THE LONG TERM FORECAST THAT THE UPPER LEVEL PATTERN WILL FEATURE A NEARLY ZONAL FLOW...WITH JUST A HINT OF ANTI-CYCLONIC CURVATURE...ACROSS THE CONTINENTAL UNITED STATES. TWO AREAS OF UPPER LEVEL LOW PRESSURE THAT WILL IMPACT THE CONTINENTAL UNITED STATES LATER IN THE LONG TERM WILL BE LOCATED OVER THE WESTERN CANADIAN COAST AND ACROSS THE HUDSON BAY ON SUNDAY NIGHT. THE EASTERN FEATURE WILL BRING TWO SYSTEMS ACROSS THE EASTERN UNITED STATES THROUGH THE WEEK...BUT THE WESTERN SYSTEM WILL REMAIN STATIONARY AND EJECT SOME WEAK ENERGY WITHIN SOUTHWEST FLOW ACROSS THE NORTHERN ROCKIES WITH THE BEST CHANCES FOR PRECIPITATION WEDNESDAY NIGHT THROUGH THURSDAY NIGHT. WITH THE NEARLY ZONAL FLOW...EXPECT PERIODS OF STRONG WINDS WITH THE DEVELOPMENT OF SURFACE TROUGHS IN THE LEE OF THE ROCKIES. THE PERIODS OF STRONGER WINDS WILL LIKELY BE MONDAY NIGHT...WEDNESDAY NIGHT AND SATURDAY NIGHT ACROSS THE AREA. TUESDAY THROUGH THURSDAY THE AREA WILL HAVE GENERALLY ABOVE NORMAL TEMPERATURES...BEFORE SLIGHTLY COOLER THAN NORMAL TO NEAR NORMAL CONDITIONS ARRIVE FOR LATE IN THE WEEK. .FIRE WEATHER... AN INVERTED SURFACE TROUGH IS EXPECTED TO EXTEND NORTH FROM THE SURFACE LOW PRESSURE ACROSS EASTERN COLORADO TONIGHT AND SUNDAY CREATING A FAVORABLE GRADIENT FOR GUSTY SOUTHWEST WINDS IN THE FAVORED HIGHER WIND AREAS IN THE FOOTHILLS OF THE SNOWY RANGE AND LARAMIE RANGE. GUSTIEST WINDS SHOULD OCCUR THROUGH THE EARLY EVENING HOURS TONIGHT...WITH ONLY MODERATE WINDS EXPECTED TONIGHT AND SUNDAY. NEAR NORMAL TEMPERATURES ARE EXPECTED ON SUNDAY BEFORE A WARMING TREND TO ABOVE NORMAL TEMPERATURES THROUGH MUCH OF NEXT WEEK OCCURS. MID-LEVELS OF THE ATMOSPHERE WILL DRY SIGNIFICANTLY MONDAY AND TUESDAY EAST OF THE LARAMIE RANGE...BUT RELATIVE HUMIDITY MINIMUMS WILL ONLY FALL TO AROUND 25 TO 45 PERCENT IN THESE AREAS. SLIGHTLY HIGHER HUMIDITY MINIMUMS WILL BE PRESENT WEST OF THE LARAMIE RANGE EARLY NEXT WEEK. && .AVIATION...18Z TAF ISSUANCE THE MAIN CONCERN WITH THIS TAF ISSUANCE IS WHETHER THE LOW CLOUDS WILL RETROGRADE BACK TO THE WEST TONIGHT ACROSS THE PANHANDLE SITES. MVFR CEILINGS WILL ALSO BE POSSIBLE AT THE RWL TAF SITE DUE TO UPSLOPE EFFECTS. THIS TREND MAY CONTINUE THROUGH MUCH OF THE EVENING...AND POSSIBLY INTO TOMORROW. ELSEWHERE...VFR CONDITIONS WILL BE THE RULE...DUE TO MAINLY DRIER ALOFT AND DOWNSLOPE FLOW. COX && .CYS WATCHES/WARNINGS/ADVISORIES... WY...HIGH WIND WARNING UNTIL 5 PM SATURDAY FOR WYZ106. NE...NONE. && SHORT TERM/AVIATION...REC LONG TERM...CARPENTER
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 314 PM MST SAT FEB 26 2011 WYZ103>105-107-109>118-271930- NORTH LARAMIE RANGE-FERRIS/SEMINOE/SHIRLEY MOUNTAINS- SHIRLEY BASIN-EAST PLATTE COUNTY-CENTRAL CARBON COUNTY- NORTH SNOWY RANGE FOOTHILLS-SOUTHWEST CARBON COUNTY- SIERRA MADRE RANGE-UPPER NORTH PLATTE RIVER BASIN-SNOWY RANGE- LARAMIE VALLEY-SOUTH LARAMIE RANGE-SOUTH LARAMIE RANGE FOOTHILLS- CENTRAL LARAMIE COUNTY- 314 PM MST SAT FEB 26 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL WYOMING... SOUTH CENTRAL WYOMING AND SOUTHEAST WYOMING. SCATTERED TO NUMEROUS SNOW SHOWERS ARE EXPECTED TO CONTINUE MAINLY IN THE SNOWY AND SIERRA MADRE RANGES THIS AFTERNOON. ADDITIONAL SNOW ACCUMULATIONS UP TO 1 INCH IS POSSIBLE ABOVE 7500 FEET. GUSTY WINDS TO 50 MPH WILL CAUSE BLOWING SNOW AND SOME HAZARDOUS DRIVING CONDITIONS ESPECIALLY AROUND ARLINGTON. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY SOUTHWEST WINDS ARE EXPECTED TO INCREASE SUNDAY AND BECOME BY EARLY MONDAY MORNING...ESPECIALLY IN THE WIND PRONE AREAS ALONG INTERSTATE 80 AND INTERSTATE 25. STRONG WINDS WILL LIKELY CONTINUE THROUGH WEDNESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE NEZ002-003-021-055-WYZ101-102-271930- DAWES-BOX BUTTE-MORRILL-CHEYENNE-CONVERSE COUNTY LOWER ELEVATIONS- NIOBRARA COUNTY- 314 PM MST SAT FEB 26 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA PANHANDLE AND EAST CENTRAL WYOMING. .DAY ONE...THIS AFTERNOON AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE NEZ019-020-054-095-096-WYZ108-119-271930- SCOTTS BLUFF-BANNER-KIMBALL-NORTH SIOUX-SOUTH SIOUX-GOSHEN COUNTY- EAST LARAMIE COUNTY- 314 PM MST SAT FEB 26 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA PANHANDLE...SOUTHEAST WYOMING. .DAY ONE...THIS AFTERNOON AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THERE IS A CHANCE OF SNOW ON SUNDAY AFTERNOON AND SUNDAY NIGHT...BUT SNOW ACCUMULATION WILL BE LITTLE IF ANY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE WYZ106-271930- CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY- 314 PM MST SAT FEB 26 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL WYOMING. .DAY ONE...THIS AFTERNOON AND TONIGHT SEE THE LATEST HIGH WIND WARNING FOR FURTHER DETAILS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THERE IS A CHANCE OF SNOW ON SUNDAY AFTERNOON AND SUNDAY NIGHT...BUT SNOW ACCUMULATION WILL BE LITTLE IF ANY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE COX
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 403 PM MST SAT FEB 26 2011 WYZ101-103>106-110-116-117-270200- CONVERSE COUNTY LOWER ELEVATIONS-NORTH LARAMIE RANGE- FERRIS/SEMINOE/SHIRLEY MOUNTAINS-SHIRLEY BASIN- CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY- NORTH SNOWY RANGE FOOTHILLS-SOUTH LARAMIE RANGE- SOUTH LARAMIE RANGE FOOTHILLS- INCLUDING THE CITIES OF...DOUGLAS...GLENROCK...MUDDY GAP... MEDICINE BOW...BORDEAUX...ARLINGTON...ELK MOUNTAIN...VEDAUWOO... BUFORD...PUMPKIN VINE...HORSE CREEK...HARRIMAN...WHITAKER 403 PM MST SAT FEB 26 2011 ...STRONG WINDS WILL CONTINUE IN SOME AREAS ALONG AND WEST OF THE LARAMIE RANGE THROUGH 7 PM... WESTERLY WINDS HAVE BEEN SUSTAINED AT 30 TO 35 MPH IN SOME AREAS ALONG AND WEST OF THE LARAMIE RANGE THIS AFTERNOON WITH GUSTS BETWEEN 40 AND 50 MPH. THE HIGHEST WIND GUSTS OF AROUND 50 MPH WERE NOTED AT 345 PM BETWEEN WHEATLAND AND GLENDO AS WELL AS NEAR GLENROCK. THE STRONG WINDS WILL CONTINUE OVER THAT AREA THROUGH 7 PM AND THEN WILL DIMINISH FAIRLY QUICKLY. A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM FOR THE AREA BETWEEN CHUGWATER AND WHEATLAND. MOTORISTS TRAVELING IN AREAS ALONG AND WEST OF THE LARAMIE RANGE THROUGH THE EARLY EVENING SHOULD BE PREPARED FOR THE STRONG' WINDS AND SUDDEN GUSTS. BLOWING SNOW WILL CONTINUE IN SOME AREAS WEST OF THE LARAMIE RANGE THROUGH THE EARLY EVENING. THE BLOWING SNOW WILL REDUCE VISIBILITIES AND CREATE SLICK ROADS IN SOME PLACES. WEILAND
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
426 PM MST SAT FEB 26 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0406 PM TSTM WND GST 13 S GLENDO 42.32N 105.03W
02/26/2011 M54 MPH PLATTE WY DEPT OF HIGHWAYS
WINDS WERE SUSTAINED AT 37 MPH.
0405 PM NON-TSTM WND GST DEER CREEK 42.83N 105.78W
02/26/2011 M52 MPH CONVERSE WY DEPT OF HIGHWAYS
WINDS WERE SUSTAINED AT 38 MPH.
&&
MWEILANDPRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE CHEYENNE WY
426 PM MST SAT FEB 26 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0406 PM NON-STM WND GST 13 S GLENDO 42.32N 105.03W
02/26/2011 M54 MPH PLATTE WY DEPT OF HIGHWAYS
WINDS WERE SUSTAINED AT 37 MPH.
0405 PM NON-TSTM WND GST DEER CREEK 42.83N 105.78W
02/26/2011 M52 MPH CONVERSE WY DEPT OF HIGHWAYS
WINDS WERE SUSTAINED AT 38 MPH.
&&
MWEILANDThe national radar mosaic for the moment the first event began.
1 high wind. Local standard time, as filed.
WYDOT sensor at Coleman recorded a gust of 59 mph.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2011Every state in 2011This day in weather historyWarnings in Wyoming, February 2011
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: 276888.