A low pressure system moved from Montana across the Dakotas and tightened the pressure gradient across southeast Wyoming. Consequently, very strong west to southwest winds developed, with gusts of 60 to 80 mph.
Every event with a place to put it; 23 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 low pressure system moved from Montana across the Dakotas and tightened the pressure gradient across southeast Wyoming. Consequently, very strong west to southwest winds developed, with gusts of 60 to 80 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 Nov 28, 4:43 AM MST, 3 hours 47 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHEYENNE WY
443 AM MST FRI NOV 28 2014
.SHORT TERM...(TODAY AND TONIGHT)
ISSUED AT 355 AM MST FRI NOV 28 2014
PREDAWN WATER VAPOR LOOP SHOWED A BROAD UPPER RIDGE CENTERED OVER
THE INTERMOUNTAIN WEST WITH A FAIRLY STRONG WEST-NORTHWEST FLOW
ALOFT. A UPPER TROUGH WAS DIGGING SOUTHEAST ACROSS BRITISH COLUMBIA
TOWARD THE PACIFIC NORTHWEST. A TIGHT 700-850MB GRADIENT WITH 40-55
KT WINDS WAS GENERATING STRONG WEST-SOUTHWEST SURFACE WINDS BETWEEN
CHEYENNE AND THE I-80 SUMMIT AND NORTH AND SOUTH OF CHEYENNE ALONG
I-25. THESE STRONG WINDS WILL PERSIST THROUGH THE EARLY MORNING.
DOWNSLOPE FLOW KEPT TEMPERATURES QUITE MILD FOR THIS TIME OF NIGHT
WITH 40S AND 50S.
MAIN FORECAST CHALLENGES DURING THE SHORT TERM WILL FOCUS ON HIGH
WINDS AND TIMING/IMPACTS FROM ARCTIC COLD FRONTAL PASSAGE SUNDAY.
THE LATEST NUMERICAL MODEL GUIDANCE HAS A GOOD HANDLE ON THE LARGE
SCALE PATTERN...WITH THE FLATTENING OF THE WESTERN CONUS UPPER
RIDGE AS THE UPPER TROUGH TO THE NORTHWEST PROGRESSES SOUTHEAST
INTO THE NORTH CENTRAL CONUS SUNDAY. UNTIL THEN...DOWNSLOPE FLOW
AND 700MB TEMPERATURES AS WARM AS 6C EAST OF THE LARAMIE RANGE WILL
MAINTAIN UNSEASONABLY MILD AND DRY PATTERN TODAY AND SATURDAY.
AFTERNOON HIGH TEMPERATURES TODAY AND SATURDAY WILL RANGE FROM 60
TO 65 DEGREES FOR THE PLAINS...WITH 40S AND 50S ALONG AND WEST OF
THE LARAMIE RANGE. BOTH THE GFS AND NAM PROG 700MB WINDS IN THE
45-55 KT RANGE TODAY...INCREASING TO 55-65 KT TONIGHT AND
MAINTAINING THAT INTENSITY THROUGH SATURDAY. THE 00Z MESOETA
CRAIG-CASPER 700-850MB HEIGHT GRADIENTS LIKEWISE INCREASE FROM
55-60M TODAY TO 60-70M TONIGHT AND SATURDAY. MITIGATING FACTORS
FOR THE DEVELOPMENT OF HIGH WINDS HAS BEEN CLOUD COVER...STOUT LOW
LEVEL INVERSION AND WEAK LAPSE RATES. TODAY AND SATURDAY WILL SEE
LESS CLOUD COVER. INVERSION WAS PRESENT EARLY THIS MORNING...AND
PER BUFKIT FORECAST SOUNDINGS...WILL WEAKEN ENOUGH THIS AFTERNOON
TO ALLOW STRONGER WINDS ALOFT TO MIX DOWN TO THE SURFACE. HIGH
WINDS LOOK MORE FAVORABLE LATER TONIGHT AS CROSS MOUNTAIN FLOW
APPROACHES 60 KT...AND DURING DAYLIGHT HOURS SATURDAY WITH
FORECAST STEEPER LOW-MID LEVEL LAPSE RATES. THAT SAID...HAVE
ISSUED A HIGH WIND WATCH FOR WIND PRONE AREAS INCLUDING
FERRIS/SEMINOE/SHIRLEY MOUNTAIN RANGE BEGINNING LATE THIS
AFTERNOON AND CONTINUING THROUGH SATURDAY AFTERNOON.
WINDS DECREASE SATURDAY NIGHT AS THE ARCTIC COLD FRONT PUSHES
THROUGH SOUTHEAST WY AND WESTERN NE. THE SHALLOW COLD AIR MASS
WILL SPREAD SOUTH AND WEST TOWARD THE FRONT RANGE WITH BRISK
NORTHERLY SURFACE WINDS. ALONG AND BEHIND THE FRONT...LIGHT RAIN
WILL QUICKLY CHANGE TO SNOW WITH THE ARRIVAL OF THE COLD AIR MASS.
MODELS PROG MOST OF THE SNOWFALL TO BE LIGHT...EXCEPT OVER THE
HIGHER TERRAIN WHERE IT WILL BE MODERATE AT TIMES. ACCUMULATIONS
SATURDAY NIGHT AND SUNDAY WILL VARY FROM 1/2 INCH FOR THE EASTERN
WY PLAINS AND NORTHERN NE PANHANDLE TO 1 TO 3 INCHES FOR THE NORTH
LARAMIE RANGE. PRECIPITATION WILL MIX WITH OR CHANGE BRIEFLY TO
RAIN FOR THE LOWER VALLEYS WEST OF THE LARAMIE RANGE WHERE
TEMPERATURES WILL HOVER BETWEEN 35 AND 40 DEGREES. HIGH TEMPERATURES
SUNDAY WILL BE AS MUCH AS 35 DEGREES COLDER FOR THE PLAINS. BRISK
NORTH WINDS WILL MAKE IT FEEL LIKE SINGLE DIGITS AND TEENS.
.LONG TERM...(SUNDAY NIGHT THROUGH THURSDAY)
ISSUED AT 330 AM MST FRI NOV 28 2014
COLD AIR MASS WILL BE IN PLACE ON SUNDAY NIGHT IN THE WAKE OF THE
FRONTAL PASSAGE. KEPT CHANCE POPS IN PLACE FOR AREAS NEAR THE
COLORADO BORDER EARLY IN THE NIGHT WITH LOW LEVEL UPSLOPE IN
PLACE. SINCE DEEP LAYER FORCING FOR ASCENT IS LARGELY
ABSENT...SNOW ACCUMULATIONS WILL LARGELY BE LESS THAN 1-2 INCHES.
MONDAY WILL BE ON THE COOL SIDE WITH WINDS TURNING TO THE SOUTH AS
THE SFC HIGH SLIDES EASTWARD TOWARD IOWA. FOCUS THEN TURNS TO THE
PROGRESSIVE SHORTWAVE THAT IS PROGGED TO MOVE QUICKLY EASTWARD
ALONG THE CANADIAN BORDER ON MONDAY NIGHT. THE LOW LEVEL GRADIENT
WILL INCREASE ACROSS SOUTHEAST WY WITH THE 850MB CAG-CPR GRADIENT
AROUND 60 METERS BY 12Z TUESDAY. COULD SEE HIGH WINDS COMING BACK
TO PLACES LIKE ARLINGTON AND BORDEAUX...HOWEVER IT WOULD BE A
QUICK EVENT WITH WINDS BEGINNING TO SUBSIDE BY THE AFTN. TEMPS
WILL WARM TO ABOVE AVERAGE ON TUESDAY WITH THE WARM ADVECTION AND
DOWNSLOPE IN PLACE. CUTOFF LOW OFF THE CALIFORNIA COAST ON TUESDAY
WILL WEAKEN AND SHIFT EASTWARD INTO THE GREAT BASIN BY WED. WITH
INCREASING PACIFIC MOISTURE AND MOIST WESTERLY FLOW AIDING
OROGRAPHICS...HAVE A CHANCE OF SNOW IN THE SIERRA MADRE AND SNOWY
RANGES FOR WED AND WED NIGHT. OVERALL THE TEMPS ON WED AND THURS
WILL BE SEASONAL AND WINDS NOT TOO STRONG.
&&
.AVIATION...(FOR THE 12Z TAFS THROUGH 12Z SATURDAY MORNING)
ISSUED AT 439 AM MST FRI NOV 28 2014
WINDY CONDITIONS ACROSS SOUTHEAST WY WILL BE THE MAIN AVIATION
CONCERN. WINDS WILL GENERALLY INCREASE BY LATE MORNING WITH GUSTS
TO 25-35 KTS THROUGH THE AFTERNOON FROM RWL TO CYS. WHILE WINDS
WILL BE WEAKER ACROSS THE NEBRASKA PANHANDLE...IT STILL WILL BE
BREEZY FROM TIME TO TIME DURING THE AFTERNOON. CLOUD COVER WILL BE
LIMITED TO A SCT-TO-BKN LAYER OF HIGH CLOUDS.
&&
.FIRE WEATHER...
ISSUED AT 300 AM MST FRI NOV 28 2014
MINIMAL FIRE WEATHER ISSUES ANTICIPATED THIS HOLIDAY WEEKEND.
UNSEASONABLY MILD TEMPERATURES WILL CONTINUE TODAY AND SATURDAY.
LOWEST RELATIVE HUMIDITIES WILL RANGE FROM 15 TO 20 PERCENT
IMMEDIATELY EAST OF THE LARAMIE RANGE. STRONG AND GUSTY WEST TO
SOUTHWEST WINDS WILL PREVAIL ACROSS MUCH OF SOUTHEAST WYOMING...
MAINLY DURING THE DAYLIGHT HOURS TODAY AND SATURDAY. A ARCTIC
COLD FRONT WILL PUSH SOUTH ACROSS THE PLAINS AND STALL NEAR THE
FRONT RANGE SUNDAY...BRINGING MUCH COLDER TEMPERATURES AND CHANCES
FOR LIGHT RAIN AND SNOW.
&&
.CYS WATCHES/WARNINGS/ADVISORIES...
WY...HIGH WIND WATCH FROM THIS AFTERNOON THROUGH SATURDAY AFTERNOON
FOR WYZ104-106-110-116-117.
NE...NONE.
&&
SHORT TERM...MJ
LONG TERM...ZF
AVIATION...ZF
FIRE WEATHER...MJHAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 450 AM MST FRI NOV 28 2014 WYZ101>119-291200- CONVERSE COUNTY LOWER ELEVATIONS-NIOBRARA COUNTY- NORTH LARAMIE RANGE-FERRIS/SEMINOE/SHIRLEY MOUNTAINS- SHIRLEY BASIN-CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY- EAST PLATTE COUNTY-GOSHEN 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-EAST LARAMIE COUNTY- 450 AM MST FRI NOV 28 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST CENTRAL WYOMING...SOUTH CENTRAL WYOMING AND SOUTHEAST WYOMING. .DAY ONE...TODAY AND TONIGHT STRONG WEST TO SOUTHWEST WINDS WILL CONTINUE THROUGH TONIGHT ACROSS SOUTHEAST WYOMING...ESPECIALLY FOR THE WIND PRONE AREAS OF BORDEAUX...VEDAUWOO AND ARLINGTON...WHERE GUSTS TO 50 MPH ARE POSSIBLE. THE WINDS WILL INCREASE BY TONIGHT AND A HIGH WIND WATCH IS IN EFFECT FOR THESE AREAS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY STRONG WINDS WILL CONTINUE FOR THE WIND PRONE AREAS THROUGH EARLY SATURDAY NIGHT. LIGHT ACCUMULATING SNOW IS POSSIBLE SUNDAY EVENING INTO MONDAY MORNING BEHIND A COLD FRONT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE REQUIRED THROUGH TONIGHT. NEZ002-003-019>021-054-055-095-096-291200- DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-KIMBALL-CHEYENNE- NORTH SIOUX-SOUTH SIOUX- 450 AM MST FRI NOV 28 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WESTERN NEBRASKA. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE REQUIRED THROUGH TONIGHT.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 303 AM MST FRI NOV 28 2014 WYZ106-117-281215- CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY- SOUTH LARAMIE RANGE FOOTHILLS- INCLUDING THE CITIES OF...BORDEAUX...HORSE CREEK...HARRIMAN... WHITAKER 303 AM MST FRI NOV 28 2014 ...STRONG WINDS OVERNIGHT AFFECTING PORTIONS OF INTERSTATES 25 AND 80... SUSTAINED WEST TO SOUTHWEST WINDS OF 30 TO 40 MPH WITH GUSTS TO AROUND 55 MPH WILL IMPACT TRAVEL ON INTERSTATE 25 NORTH AND SOUTH OF CHEYENNE...AND INTERSTATE 80 BETWEEN CHEYENNE AND THE SUMMIT OVERNIGHT. THE WYOMING DEPARTMENT OF TRANSPORTATION ADVISES NO LIGHT TRAILER TRAFFIC DUE TO WIND SPEEDS ABOVE 50 MPH. THESE WINDS MAY CAUSE LOSS OF VEHICLE CONTROL OR A BLOW OVER TO HIGH PROFILE VEHICLES TRAVELING EMPTY OR WITH A LIGHT LOAD. DRIVERS OF SUCH VEHICLES ARE ADVISED TO DELAY TRAVEL. FOR ROAD CONDITIONS IN WYOMING...DIAL 5 1 1. JAMSKI
The national radar mosaic for the moment the first event began.
23 high wind. Local standard time, as filed.
The UPR sensor at Emkay measured wind gusts of 58 mph or higher, with a peak gust of 81 mph at 28/1245 MST.
The WYDOT sensor at Coleman measured peak wind gusts of 63 mph.
The WYDOT sensor at Bordeaux measured sustained winds of 40 mph or higher.
The UPR sensor at Lynch measured sustained winds of 40 mph or higher, with a peak gust of 67 mph at 29/1155 MST.
The WYDOT sensor at Foote Creek measured sustained winds of 40 mph or higher.
The WYDOT sensor at Lone Tree measured sustained winds of 40 mph or higher, with a peak gust of 58 mph at 29/0941 MST.
The WYDOT sensor at Vedauwoo measured sustained winds of 40 mph or higher, with a peak gust of 60 mph at 29/1017 MST.
The UPR sensor at Buford measured sustained winds of 40 mph or higher.
The WYDOT sensor at Buford East measured sustained winds of 40 mph or higher.
The WYDOT sensor at Halleck Ridge measured sustained winds of 40 mph or higher, with a peak gust of 61 mph at 29/1211 MST.
The WYDOT sensor at Dana Ridge measured sustained winds of 40 mph or higher.
The WYDOT sensor at Bordeaux measured sustained winds of 40 mph or higher, with a peak gust of 62 mph at 29/1056 MST.
The WYDOT sensor at Coleman measured sustained winds of 40 mph or higher, with a peak gust of 65 mph at 29/1301 MST.
The WYDOT sensor at Interstate 80 MM 249 measured sustained winds of 40 mph or higher.
The UPR sensor at Emkay measured wind gusts of 58 mph or higher, with a peak gust of 71 mph at 29/1145 MST.
The WYDOT sensor at Otto measured sustained winds of 40 mph or higher, with a peak gust of 67 mph at 29/1240 MST.
The WYDOT sensor at Deer Creek measured sustained winds of 40 mph or higher.
The WYDOT sensor at Whitaker measured sustained winds of 40 mph or higher.
The WYDOT sensor at Bear Creek measured sustained winds of 40 mph or higher.
A AWOS sensor near Muddy Gap measured a peak wind gust of 58 mph.
The UPR sensor at Rock River measured a peak wind gust of 58 mph.
A peak wind gust of 58 mph was measured at Bill.
The sensor at the Cheyenne Airport measured a peak wind gust of 61 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, November 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: 549078, 549066, 549064, 549076, 549069, 549075, 549077, 549074, 549073, 549070, 549068, 549065, 549067, 549071, 549079, 549080, 549061, 549081, 549082, 549063, 549072, 549062, 549083.