A tight pressure gradient setup over the Arlington and Interstate 80 Summit areas. This lead to strong winds developing over the areas.
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.
A tight pressure gradient setup over the Arlington and Interstate 80 Summit areas. This lead to strong winds developing over the areas.
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 25, 10:40 PM MST, 4 hours 12 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHEYENNE WY 1040 PM MST THU NOV 25 2010 .UPDATE... && .AVIATION...06Z TAFS VFR CONDITIONS EXPECTED AS HIGH PRESSURE REMAINS OVER THE AREA. GUSTY WEST TO NORTHWEST WINDS EXPECTED TO RETURN FOR MOST OF THE TAF PERIOD. WINDS WILL DIE OFF FINALLY AFTER 23Z OR SO AND BECOME LIGHT. CLAYCOMB && .PREV DISCUSSION... /ISSUED 805 PM MST THU NOV 25 2010/ UPDATE... WINDS HAVE BEGUN TO DECREASE AROSS MUCH OF THE LARAMIE RANGE EARLY THIS EVENING EXCEPT IN OUR WIND PRONE AREAS AT BORDEAUX AND ARLINGTON. HAVE GONE AHEAD AND CANCELLED THE HIGH WIND WARNINGS THAT WERE OUT FOR THE OTHER ZONES THAT WERE IN THE WARNING...BUT KEPT BORDEAUX AND ARLINGTON ZONES GOING UNTIL 8 AM FRIDAY. UPDATES SENT. CLAYCOMB PREV DISCUSSION... /ISSUED 202 PM MST THU NOV 25 2010/ SHORT TERM...LATE THIS AFTERNOON THROUGH SATURDAY...CURRENT VISIBLE SATELLITE LOOP SHOWS MOSTLY CLEAR SKIES OVER SOUTHEAST WYOMING AND WESTERN NEBRASKA AS THE INTENSE STORM SYSTEM WHICH BROUGHT SNOW TO PORTIONS OF THE AREA EARLIER THIS WEEK HAS MOVED INTO THE GREAT LAKES REGION AND EASTERN UNITED STATES. THE MAIN FORECAST CONCERN FOR THE NEXT 12 TO 24 HOURS IS THE VERY STRONG WINDS OVER WYOMING WITH RECENT GUSTS OVER 70 MPH THIS AFTERNOON. ALTHOUGH THE MAIN STORM SYSTEM IS WELL EAST OF THE AREA...A STRONG PRESSURE GRADIENT REMAINS OVER SOUTHEAST WYOMING WITH SOME DOWNSLOPE COMPONENT AND GAP FLOW IN BETWEEN MOUNTAIN RANGES. WILL KEEP THE HIGH WIND WARNING THROUGH THIS EVENING WITH THE MORE WIND PRONE AREAS SEEING VERY STRONG WINDS INTO EARLY TOMORROW MORNING. BY FRIDAY...EXPECT THE SURFACE PRESSURE GRADIENT TO WEAKEN A BIT. ALTHOUGH WINDY CONDITIONS ARE STILL EXPECTED...DO NOT ANTICIPATE HIGH WIND CRITERIA AT THIS TIME INTO TOMORROW EVENING. FOR FRIDAY NIGHT AND SATURDAY...A WEAK RIDGE OF HIGH PRESSURE ALOFT WILL MOVE INTO THE ROCKIES AND GREAT PLAINS. ALONG WITH A CONTINUATION OF DRY WEATHER...EXPECT TEMPS TO WARM BACK TO NEAR NORMAL BY SATURDAY AFTERNOON WITH HIGHS IN THE 40S TO LOW 50S EAST OF THE LARAMIE RANGE. TEMPS WILL STAY ON THE COOL SIDE WEST OF THE LARAMIE RANGE DUE TO VALLEY TEMPERATURE INVERSIONS. LOW TEMPERATURES WILL REMAIN ON THE COOL SIDE...AND GENERALLY IN THE SINGLE DIGITS AND TEENS. LONG TERM...SATURDAY NIGHT THROUGH THURSDAY...UPPER FLOW BACKS TO SW OVER THE AREA SAT NIGHT AHEAD OF NEXT UPPER TROF THAT WILL MOVE INTO THE WESTERN CONUS. THIS SYSTEM WILL MOVE SLOWLY EASTWARD AND IS EXPECTED TO PASS ACROSS THE CWA SUNDAY NIGHT AND MONDAY BRINGING SCTD SNOW SHOWERS...MOST NUMEROUS OVER THE MTNS. ASSOCIATED COLD FRONT WILL PASS ACROSS THE CWA SUNDAY AFTERNOON AND EVENING WITH RATHER BLUSTERY AND COLD WEATHER ON MONDAY. CLEARING OUT MONDAY NIGHT AS UPPER TROF AXIS MOVES INTO THE PLAINS WITH COOL AND BREEZY WEATHER FOR TUESDAY. TEMPS MODERATING SOME WEDS AND THURSDAY AS UPPER FLOW TURNS MORE WESTERLY THEN APPROACH OF NEXT UPPER SYSTEM MAY SPREAD SOME SNOW SHOWERS OVER THE FAR WESTERN PARTS OF THE CWA ON THURSDAY. AVIATION...00Z TAFS... VFR CONDITIONS EXPECTED THROUGH FRIDAY. STRONG AND GUSTY WINDS VCTY MTNS WILL DIMINISH SOME OVERNIGHT BUT STILL REMAIN GUSTY THROUGH SATURDAY. FIRE WEATHER...STRONG WINDS WILL CONTINUE THROUGH TONIGHT ACROSS MOST OF SOUTHEAST WYOMING WITH WIND SPEEDS SLOWLY DIMINISHING ON FRIDAY. DRY WEATHER IS EXPECTED INTO EARLY THIS WEEKEND WITH TEMPERATURES RETURNING TO NEAR NORMAL BY SATURDAY AFTERNOON. MINIMUM HUMIDITIES WILL BE RELATIVELY LOW DURING THE AFTERNOON THROUGH SATURDAY...MAINLY ALONG INTERSTATE 80 FROM LARAMIE TO SIDNEY NEBRASKA. MORE SNOW AND COLDER TEMPERATURES ARE EXPECTED BY SUNDAY NIGHT AND MONDAY EARLY NEXT WEEK. && .CYS WATCHES/WARNINGS/ADVISORIES... WY...HIGH WIND WARNING UNTIL 8 AM FRIDAY FOR WYZ106-WYZ110. NE...NONE. && SHORT TERM/AVIATION...TJT LONG TERM...RE
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 801 PM MST THU NOV 25 2010 WYZ106-110-270315- CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY- NORTH SNOWY RANGE FOOTHILLS- 801 PM MST THU NOV 25 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL WYOMING. .DAY ONE...TONIGHT STRONG AND GUSTY WESTERLY WINDS WILL OCCUR ACROSS THE AREA TODAY AND MAINLY IN WIND PRONE AREAS TONIGHT. HIGH WIND WARNINGS REMAIN IN EFFECT FOR THESE AREAS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY HIGH WIND WARNINGS WILL REMAIN IN EFFECT THROUGH 8 AM FOR OUR WIND PRONE AREAS OF BORDEAUX AND ARLINGTON...WHERE WIND GUSTS TO 65 MPH WILL BE POSSIBLE. A STORM SYSTEM IS EXPECTED TO BRING SOME SNOW ON MONDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TONIGHT. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE NEZ002-003-019>021-054-055-095-096-WYZ102-108-119-270315- DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-KIMBALL-CHEYENNE- NORTH SIOUX-SOUTH SIOUX-NIOBRARA COUNTY-GOSHEN COUNTY- EAST LARAMIE COUNTY- 801 PM MST THU NOV 25 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA PANHANDLE...SOUTHEAST WYOMING. .DAY ONE...TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TONIGHT. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE WYZ101-103>105-107-109-111>118-270315- CONVERSE COUNTY LOWER ELEVATIONS-NORTH LARAMIE RANGE- FERRIS/SEMINOE/SHIRLEY MOUNTAINS-SHIRLEY BASIN-EAST PLATTE COUNTY- CENTRAL CARBON COUNTY-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- 801 PM MST THU NOV 25 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL WYOMING... SOUTH CENTRAL WYOMING AND SOUTHEAST WYOMING. .DAY ONE...TONIGHT GUSTY WESTERLY WINDS AREA EXPECTED OVER THE AREA TONIGHT. GUSTS IN EXCESS OF 45 MPH ARE LIKELY...ESPECIALLY OVER AND NEAR THE MOUNTAINS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY A STORM SYSTEM IS EXPECTED TO BRING SOME SNOW ON MONDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TONIGHT. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
938 PM MST THU NOV 25 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0916 PM NON-TSTM WND GST BORDEAUX 41.95N 104.95W
11/25/2010 M73 MPH PLATTE WY DEPT OF HIGHWAYS
SUSTAINED WIND 57 MPH.
0916 PM HIGH SUST WINDS ARLINGTON 41.59N 106.21W
11/25/2010 M44 MPH CARBON WY DEPT OF HIGHWAYS
&&
DDEALPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
951 PM MST THU NOV 25 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0930 PM NON-TSTM WND GST BORDEAUX 41.95N 104.95W
11/25/2010 M78 MPH PLATTE WY DEPT OF HIGHWAYS
SUSTAINED WIND 58 MPH.
0931 PM NON-TSTM WND GST ARLINGTON 41.59N 106.21W
11/25/2010 M65 MPH CARBON WY DEPT OF HIGHWAYS
SUSTAINED WIND 52 MPH.
&&
DDEALPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
1053 PM MST THU NOV 25 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1030 PM NON-TSTM WND GST ARLINGTON 41.59N 106.21W
11/25/2010 M60.00 MPH CARBON WY DEPT OF HIGHWAYS
SUSTAINED WIND 45 MPH.
1031 PM NON-TSTM WND GST BORDEAUX 41.95N 104.95W
11/25/2010 M65.00 MPH PLATTE WY DEPT OF HIGHWAYS
SUSTAINED WIND 45 MPH.
&&
MJAMSKIPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
1147 PM MST THU NOV 25 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1110 PM NON-TSTM WND GST BORDEAUX 41.95N 104.95W
11/25/2010 M60.00 MPH PLATTE WY DEPT OF HIGHWAYS
SUSTAINED WIND 47 MPH.
&&
MJAMSKIPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
205 AM MST FRI NOV 26 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0140 AM NON-TSTM WND GST BORDEAUX 41.95N 104.95W
11/26/2010 M60.00 MPH PLATTE WY DEPT OF HIGHWAYS
SUSTAINED WIND 49 MPH.
&&
MJAMSKIPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
244 AM MST FRI NOV 26 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0205 AM NON-TSTM WND GST BORDEAUX 41.95N 104.95W
11/26/2010 M63.00 MPH PLATTE WY DEPT OF HIGHWAYS
SUSTAINED WIND 45 MPH.
&&
MJAMSKIThe national radar mosaic for the moment the first event began.
5 high wind. Local standard time, as filed.
The sensor at Vedauwoo reported sustained winds at or above 40 mph during this time frame. A peak gust of 60 mph occurred at 0642LST.
The Union Pacific Railroad sensor at Emkay reported sustained winds at or above 40 mph from 355LST to 1055LST and from 1430LST to 1545LST. A peak gust of 63 mph occurred at 530LST.
The sensor at Arlington reported sustained winds in excess of 40 mph from 426LST to 1056LST and 1241LST to 1341LST. A peak gust of 61 mph occurred at 601LST.
The sensor at Buford reported sustained winds at or above 40 mph during this time frame.
The Union Pacific Railroad sensor at Lynch recorded sustained winds at or above 40 mph from 1130LST to 1445LST. A peak gust of 55 mph occurred at 1130LST.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2010Every state in 2010This day in weather historyWarnings in Wyoming, November 2010
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: 263922, 263926, 263924, 263923, 263925.