A tight pressure gradient produced a brief period of high gap winds through Arlington and Bordeaux.
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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 produced a brief period of high gap winds through Arlington and Bordeaux.
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 12, 11:48 PM MST, 2 hours 17 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHEYENNE WY 1148 PM MST THU NOV 12 2015 .UPDATE... ISSUED AT 1144 PM MST THU NOV 12 2015 A HIGH WIND WARNING HAS BEEN ISSUED FOR ARLINGTON. WIND GUSTS ARE APPROACHING 60 MPH DESPITE A VERY MODEST CAG-CPR GRADIENT AROUND 40 METERS. FLOW ALOFT SHOULD STRENGTHEN SLIGHTLY DURING THE NIGHT AS THE GRADIENT TIGHTENS FURTHER. THIS SHOULD HELP KEEP SUSTAINED WINDS NEAR 40 MPH WITH FREQUENT GUSTS IN THE 55-60 MPH RANGE. && .SHORT TERM...(THIS EVENING THROUGH FRIDAY) ISSUED AT 114 PM MST THU NOV 12 2015 TONIGHT...LOOKS LIKE A DECENT CHANCE FOR A HIGH WIND EVENT LATE TONIGHT AND EARLY FRIDAY ACROSS WESTERN PLATTE COUNTY NEAR BORDEAUX...AND WE HAVE DECIDED TO UPGRADE OUR INHERITED HIGH WIND WATCH TO A WARNING. SURFACE PRESSURE PATTERN STRENGTHENS CONSIDERABLY BY 12Z WITH THE GFS SOUNDING SHOWING 45 KNOTS JUST OFF THE SURFACE. EVEN AT MID AFTERNOON...BORDEAUX IS GUSTING TO NEAR 40 MPH. ELSEWHERE...A RELATIVELY QUIET NIGHT UNDER NORTHWEST FLOW ALOFT WITH SOME PASSING MIDDLE AND HIGH CLOUDS. FRIDAY...FLOW ALOFT BACKS TO WEST AND WEAKENS...THUS IT SHOULD BE LESS WINDY THAN TODAY. DESPITE SOME MIDDLE AND HIGH CLOUDS...RELATIVELY MILD TEMPERATURES ON TAP PER PROGGED THICKNESSES AND 700 MB TEMPERATURES. FRIDAY NIGHT/SATURDAY...CONTINUED TRANQUIL WITH THE FLOW ALOFT REMAINING RELATIVELY WEAK AND BECOMING WEST SOUTHWEST. WARMING TREND CONTINUES AS THE AIRMASS MODERATES WITH RISING THICKNESSES AND 700 MB TEMPERATURES. SATURDAY NIGHT/SUNDAY...FLOW ALOFT BACKS EVEN FURTHER TO SOUTHWEST AND STRENGTHENS IN ADVANCE OF APPROACHING SHORTWAVE TROUGHS ALOFT. THUS...BREEZY TO WINDY WITH INCREASING MIDDLE AND HIGH CLOUDS. CONTINUED MILD PER PROGGED THICKNESSES. .LONG TERM...(SUNDAY NIGHT THROUGH THURSDAY) ISSUED AT 114 PM MST THU NOV 12 2015 BY SUNDAY NIGHT AN UPPER LEVEL TROUGH BEGINS TO MOVE IN FROM THE PACIFIC ACROSS THE WESTERN UNITED STATES. THE GFS AND ECMWF ARE IN CLOSE AGREEMENT WITH UPPER LEVEL FLOW SHIFTING TO THE SOUTHWEST WITH THE SYSTEM DEEPENING DOWN INTO SOUTHERN CALIFORNIA AND ARIZONA. THE MOVEMENT OF THE LOW PRESSURE SYSTEM WILL PUSH INTO THE ROCKY MOUNTAIN REGION BY MID DAY MONDAY. THIS WILL BRING A STRONG COLD FRONT ACROSS EASTERN WYOMING...AND SHOULD BRING CHANCES FOR SNOW FOR MOST AREAS WEST OF THE LARAMIE RANGE MONDAY. THE FRONT WILL PUSH EAST BY MONDAY EVENING. AREAS EAST OF THE LARAMIE RANGE INTO THE NEBRASKA PANHANDLE WILL SEE THE BEST CHANCE FOR SNOW INTO MONDAY NIGHT AND TUESDAY MORNING. THIS SYSTEM WILL QUICKLY PROGRESS EASTWARD BY TUESDAY WHICH WILL DROP POP CHANCES SIGNIFICANTLY. CURRENT MODEL RUNS ARE SHOWING THE LOW PRESSURE DROPPING FURTHER SOUTH WHICH SHOULD KEEP SNOW ACCUMULATION LOW...ONLY ABOUT 1 TO 2 INCHES FOR AREAS WEST OF THE LARAMIE RANGE. BEHIND THE FRONTAL BOUNDARY THE PLACEMENT OF THE UPPER LEVEL JET OVER EASTERN WYOMING...WINDS WILL BE THE PRIMARY ISSUE TUESDAY AND WEDNESDAY. THE GFS IS SHOWING 800 MB WINDS AT 40 TO 50 KTS ALONG AND EAST OF THE LARAMIE RANGE. ON THURSDAY AS THE LOW PRESSURE SYSTEM PUSHES FURTHER TO THE EAST FLOW WILL SHIFT TO THE WEST AND A SHORTWAVE TROUGH PUSHES DOWN FROM CANADA WINDS WILL CONTINUE TO BE STRONG INTO THURSDAY FOR AREAS ALONG AND WEST OF THE LARAMIE RANGE. && .AVIATION...(FOR THE 06Z TAFS THROUGH 06Z FRIDAY NIGHT) ISSUED AT 1011 PM MST THU NOV 12 2015 VFR CONDITIONS NEXT 24 HOURS AS HIGH PRESSURE REMAINS IN CONTROL OF THE WEATHER ACROSS SOUTHEAST WYOMING. WESTERLY WINDS WILL BECOME GUSTY AGAIN AFTER SUNRISE AND PERSIST THROUGH THE DAY. && .FIRE WEATHER... ISSUED AT 114 PM MST THU NOV 12 2015 MINIMAL ISSUES...ALTHOUGH HUMIDITIES WILL FALL TO 15 TO 25 PERCENT ALONG AND EAST OF INTERSTATE 25 ON SATURDAY AND SUNDAY. COLDER AND MORE UNSETTLED WEATHER WILL BRING HIGHER HUMIDITIES MONDAY THROUGH WEDNESDAY. && .CYS WATCHES/WARNINGS/ADVISORIES... WY...HIGH WIND WARNING UNTIL 8 AM MST FRIDAY FOR WYZ106-110. NE...NONE. && UPDATE...CLH SHORT TERM...RUBIN LONG TERM...SML/KC AVIATION...GCC FIRE WEATHER...RUBIN
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 425 PM MST THU NOV 12 2015 WYZ101>119-131100- 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- 425 PM MST THU NOV 12 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST CENTRAL WYOMING...SOUTH CENTRAL WYOMING AND SOUTHEAST WYOMING. .DAY ONE...TONIGHT A HIGH WIND WARNING IS IN EFFECT FOR SOUTHWEST PLATTE COUNTY INCLUDING BORDEAUX FROM 2 AM TONIGHT TO 8 AM FRIDAY. EXPECT WEST WINDS OF 35 TO 45 MPH WITH GUSTS TO 60 MPH. ELSEWHERE...NO SIGNIFICANT WEATHER IS EXPECTED. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THE NEXT CHANCE OF SNOWFALL ACROSS THE REGION IS SHAPING UP TO BE ON MONDAY AS A STRONG COLD FRONT MOVES ACROSS WYOMING...AND LOW PRESSURE SYSTEM DEVELOPS ACROSS EASTERN COLORADO AND KANSAS. AT THIS TIME ALL INDICATIONS ARE THAT ANY SIGNIFICANT SNOWFALL WILL BE TO THE EAST AND SOUTHEAST OF OUR REGION WITH LIGHTER AMOUNTS FALLING OVER SOUTHEASTERN WYOMING AND THE WESTERN NEBRASKA PANHANDLE. STAY TUNED FOR FURTHER FORECASTS OF THIS EARLY WEEK STORM SYSTEM PROJECTED TO DEVELOP OVER THE GREAT PLAINS. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. NEZ002-003-019>021-054-055-095-096-131100- DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-KIMBALL-CHEYENNE- NORTH SIOUX-SOUTH SIOUX- 425 PM MST THU NOV 12 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WESTERN NEBRASKA. .DAY ONE...TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THE NEXT CHANCE OF SNOWFALL ACROSS THE REGION IS SHAPING UP TO BE MONDAY NIGHT INTO TUESDAY AS A STRONG COLD FRONT MOVES ACROSS WESTERN NEBRASKA...AND LOW PRESSURE SYSTEM DEVELOPS ACROSS EASTERN COLORADO AND KANSAS. AT THIS TIME ALL INDICATIONS ARE THAT ANY SIGNIFICANT SNOWFALL WILL BE TO THE EAST AND SOUTHEAST OF THE WESTERN NEBRASKA PANHANDLE. STAY TUNED FOR FURTHER FORECAST UPDATES ON THE EARLY WEEK STORM SYSTEM PROJECTED TO DEVELOP OVER THE GREAT PLAINS. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 1050 PM MST THU NOV 12 2015 WYZ110-131000- NORTH SNOWY RANGE FOOTHILLS- INCLUDING THE CITIES OF...ARLINGTON...ELK MOUNTAIN 1050 PM MST THU NOV 12 2015 ...STRONG WINDS AROUND THE ARLINGTON AREA THROUGH 3 AM FRIDAY MORNING... LATEST WYOMING DEPARTMENT OF TRANSPORTATION WEATHER SENSORS ALONG INTERSTATE 80 NEAR ARLINGTON ARE REPORTING SOUTHWEST WINDS OF 20 TO 25 MPH WITH GUSTS TO 50 MPH. EXPECT THESE WINDS TO REMAIN STRONG OUT NEAR ARLINGTON THROUGH THE EARLY MORNING HOURS. RECENT SNOW ALONG WITH THESE STRONG WINDS WILL CREATE HAZARDOUS DRIVING CONDITIONS BETWEEN MILE MARKERS 255 AND 290. IF TRAVELING THROUGH SOUTH CENTRAL WYOMING THIS EVENING AND EARLY MORNING ON INTERSTATE 80...BE PREPARED FOR SUDDEN WINDS GUSTS AND SLICK ROADS FROM BLOWING AND DRIFTING SNOW FOR THIS STRETCH OF INTERSTATE 80.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
1224 AM MST FRI NOV 13 2015
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1206 AM HIGH SUST WINDS 1 NNW ARLINGTON 41.60N 106.21W
11/13/2015 M41 MPH CARBON WY DEPT OF HIGHWAYS
ARLINGTON WYDOT SENSOR. AVERAGE SUSTAINED WIND FOR PAST
HOUR ENDING AT 1206 AM MST. PEAK GUST 59 MPH.
&&
HAMMERThe national radar mosaic for the moment the first event began.
2 high wind. Local standard time, as filed.
The WYDOT sensor at Arlington measured peak wind gusts of 58 mph.
The WYDOT sensor at Bordeaux measured sustained winds of 40 mph or higher.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2015Every state in 2015This day in weather historyWarnings in Wyoming, November 2015
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: 602601, 602600.