Strong winds aloft and a tight surface pressure gradient produced a brief period of high winds across portions of the north Snowy range foothills and central Laramie Range, with occasional gusts to 60 mph.
Every event with a place to put it; 5 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.
Strong winds aloft and a tight surface pressure gradient produced a brief period of high winds across portions of the north Snowy range foothills and central Laramie Range, with occasional gusts to 60 mph.
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 Dec 1, 10:07 PM MST, 1 hour 29 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHEYENNE WY 1007 PM MST MON DEC 1 2014 .UPDATE... ISSUED AT 1001 PM MST MON DEC 1 2014 WYDOT SITE AT COLEMAN IN NORTHEASTERN PLATTE COUNTY JUST HIT 60MPH GUSTS. WITH THE STRONGEST CRAIG TO CASPER 850/700MB GRADIENTS STILL AHEAD...DECIDED TO GO AHEAD AND ADD EASTERN PLATTE COUNTY INTO THE HIGH WIND WARNING AS WELL. UPDATES HAVE BEEN SENT. && .SHORT TERM...(THIS EVENING THROUGH WEDNESDAY) ISSUED AT 324 PM MST MON DEC 1 2014 FINALLY A QUIET DAY TODAY AS CLOUDS HAVE DECREASED AND TEMPS HAVE WARMED WELL INTO THE 30S AND 40S. ANOTHER POTENTIAL ROUND OF STRONG WINDS GARNERED MUCH OF THE FORECAST ATTENTION TODAY WITH PROGD KCAG-KCPR GRADIENTS ONCE AGAIN TICKING UP TO THE CRITICAL 60 METER THRESHOLD LATE THIS EVENING THROUGH MIDDAY SUNDAY. CROSS SECTIONS BOTH FROM THE GFS/NAM SHOW A BROAD AREA OF SUBSIDENCE DEVELOPING ACROSS THAT SAME AREA...FROM ARLINGTON THRU SOUTHWEST PLATTE COUNTY AT THE SAME TIME. ALTHOUGH NO REAL INVERSION SETS UP OVERNIGHT...THE THERMAL PROFILE DOES BECOME NEARLY ISOTHERMAL FOR A TIME JUST ABOVE MOUNTAIN-TOP LEVEL. ALTHOUGH GRADIENTS APPEAR FAIRLY MARGINAL...THINK THAT THIS LAYER WILL BE SUFFICIENT TO SURFACE SOME OF THESE STRONGER WINDS ALOFT. SO...HAVE ISSUED A HIGH WIND WARNING FROM 9 PM THIS EVENING THROUGH MIDDAY TUESDAY FOR THE ARLINGTON ZONE BETWEEN RAWLINS AND LARAMIE AS WELL AS IN AREAS ACROSS SOUTHWEST PLATTE COUNTY... SPECIFICALLY BETWEEN WHEATLAND AND CHUGWATER. SFC PRESSURE GRADIENT WILL BREAK UP TUESDAY AFTERNOON AS A WEAK BOUNDARY ASSOCIATED WITH A SHORTWAVE MOVING ACROSS THE DAKOTAS DROPS SOUTH THRU THE ERN PLAINS. IT LOOKS LIKE THIS FRONT WILL BE MOSTLY DRY...BUT DID INTRODUCE SMALL RAIN/SNOW CHANCES TO AREAS NR THE PINE RIDGE ON TUESDAY AFTERNOON. OTHERWISE...EXPECT A MILD DAY ON TUESDAY AS PREFRONTAL DOWNSLOPE WINDS AID HIGH TEMPERATURES THAT WILL REACH THE 40S AND 50S. FLOW TURNS MORE ZONAL FOR WEDNESDAY AS THE NEXT SHORTWAVE BEGINS TO APPROACH THE REGION FROM THE SOUTHWEST. MOUNTAIN SNOWS LOOK TO BE A GOOD BET TO RETURN WEDNESDAY AFTERNOON AS ISENTROPIC LIFT AND MOISTURE RETURN TO THE REGION. CAA BEHIND TUESDAYS COLD FRONT WILL RESULT IN A COOLER DAY ON WEDNESDAY WITH HIGH TEMPERATURES ONLY REACHING THE 40S AT LOWER ELEVATIONS. .LONG TERM...(WEDNESDAY NIGHT THROUGH MONDAY) ISSUED AT 324 PM MST MON DEC 1 2014 MEDIUM RANGE MODELS CONTINUE TO SHOW QUASI-ZONAL FLOW ALOFT IN PLACE OVER THE WESTERN CONUS THROUGH THE PERIOD. SHOULD BE A QUIET STRETCH OF WEATHER OVERALL WITH NO MAJOR STORMS EXPECTED. ANY SNOW SHOULD BE CONFINED TO THE MOUNTAINS ON WED NIGHT AND THU WITH INCREASING MID- LEVEL MOISTURE AND OROGRAPHIC EFFECTS WITH WESTERLY LLVL FLOW. SOME UNCERTAINTY LATER IN THE PERIOD WITH A SPLIT FLOW PATTERN SETTING UP OVER THE CENTRAL ROCKIES. GFS AND ECMWF BOTH SHOW THE CWA IN BETWEEN TWO DISTINCT SHORTWAVE TROUGHS. A NORTHERN STREAM WAVE MOVING ACROSS EASTERN MT AND THE WESTERN DAKOTAS...AND A SOUTHERN STREAM WAVE OVER THE FOUR CORNERS REGION. PVA AND LARGER SCALE JET FORCING MAY BE TOO FAR REMOVED TO GENERATE PCPN...SO LEFT THE FCST DRY FOR NOW BEYOND FRI. THINK THE BEST CHANCE FOR SNOW SHOWERS WOULD COME ON SUN AS THE ASSOCIATED SFC COLD FRONT MOVES ACROSS THE AREA. TEMPERATURES SHOULD BE NEAR TO ABOVE NORMAL WITH H7 TEMPS AROUND 0 DEG C. THE WARMEST DAYS SHOULD BE THU AND FRI WITH DOWNSLOPE FLOW. && .AVIATION...(FOR THE 06Z TAFS THROUGH 06Z TUESDAY NIGHT) ISSUED AT 1001 PM MST MON DEC 1 2014 VFR THROUGH MOST OF THE NEXT 24 HOURS FOR OUR SOUTHEAST WYOMING AND NEBRASKA PANHANDLE AIRPORTS. DO HAVE A COLD FRONT DROPPING SOUTH TUESDAY AFTERNOON AND LATEST SREF AVIATION FLIGHT CONDITIONS FORECAST DOES SHOW LOWERING CEILINGS IN THE PANHANDLE LATE AFTERNOON FOR THE PANHANDLE AIRPORTS. FOR NOW...WENT WITH MVFR CEILINGS...BUT MAY NEED TO GO LOWER IF SUFFICIENT LOW LEVEL MOISTURE DEVELOPS IN THE UPSLOPING NORTHEAST WINDS. && .FIRE WEATHER... ISSUED AT 324 PM MST MON DEC 1 2014 FIRE WEATHER CONCERNS WILL BE MINIMAL THROUGH THE WEEK. ANOTHER ROUND OF STRONG WINDS WILL OCCUR TONIGHT AND EARLY TUESDAY ACROSS PORTIONS OF SOUTHEAST WYOMING. AFTER A MILD DAY TUESDAY...A COLD FRONT WILL DROP SOUTH THROUGH EASTERN PLAINS TUESDAY AFTERNOON... USHERING IN A SLIGHTLY COOLER DAY FOR WEDNESDAY. PRECIPITATION CHANCES WILL RETURN TO THE AREA LATER WEDNESDAY AFTERNOON AND WEDNESDAY NIGHT. DAILY MINIMUM RELATIVE HUMIDITIES WILL HOLD ABOVE 30 PERCENT. && .CYS WATCHES/WARNINGS/ADVISORIES... WY...HIGH WIND WARNING UNTIL NOON MST TUESDAY FOR WYZ106-107-110. NE...NONE. && UPDATE...GCC SHORT TERM...CAH LONG TERM...CLH AVIATION...GCC FIRE WEATHER...CAH
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 330 PM MST MON DEC 1 2014 NEZ002-003-019>021-054-055-095-096-WYZ101-102-108-111>115-118-119- 022230- DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-KIMBALL-CHEYENNE- NORTH SIOUX-SOUTH SIOUX-CONVERSE COUNTY LOWER ELEVATIONS- NIOBRARA COUNTY-GOSHEN COUNTY-SOUTHWEST CARBON COUNTY- SIERRA MADRE RANGE-UPPER NORTH PLATTE RIVER BASIN-SNOWY RANGE- LARAMIE VALLEY-CENTRAL LARAMIE COUNTY-EAST LARAMIE COUNTY- 330 PM MST MON DEC 1 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST WYOMING AND THE WESTERN NEBRASKA PANHANDLE. .DAY ONE...THIS AFTERNOON AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TONIGHT. WYZ103>107-109-110-116-117-022230- NORTH LARAMIE RANGE-FERRIS/SEMINOE/SHIRLEY MOUNTAINS- SHIRLEY BASIN-CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY- EAST PLATTE COUNTY-CENTRAL CARBON COUNTY- NORTH SNOWY RANGE FOOTHILLS-SOUTH LARAMIE RANGE- SOUTH LARAMIE RANGE FOOTHILLS- 330 PM MST MON DEC 1 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST WYOMING. .DAY ONE...THIS AFTERNOON AND TONIGHT GUSTY WEST TO SOUTHWEST WILL STRENGTHEN TONIGHT AND EARLY TUESDAY ESPECIALLY IN THE TYPICALLY WIND PRONE AREAS AROUND ARLINGTON AND BORDEAUX. SOME GUSTS IN EXCESS OF 60 MPH ARE EXPECTED. HIGH WIND WARNINGS ARE IN EFFECT FOR AREAS BETWEEN RAWLINS AND LARAMIE AS WELL AS SOUTHWEST PLATTE COUNTY. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY WINDY CONDITIONS WILL PERSIST OVER PARTS OF THE AREA ON TUESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TONIGHT.
The national radar mosaic for the moment the first event began.
5 high wind. Local standard time, as filed.
The WYDOT sensor at Halleck Ridge measured sustained winds of 40 mph or higher, with a peak gust of 60 mph at 02/0001 MST.
The WYDOT sensor at Coleman measured sustained winds of 40 mph or higher, with a peak gust of 60 mph at 02/0316 MST.
The WYDOT sensor at Elk Mountain measured peak wind gusts of 58 mph.
The WYDOT sensor at Bordeaux measured peak wind gusts of 58 mph.
The WYDOT sensor at Strouss Hill measured peak wind gusts of 58 mph.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2014Every state in 2014This day in weather historyWarnings in Wyoming, December 2014
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: 549956, 549954, 549955, 549953, 549957.