Strong winds reported in the North Snowy Range Foothills along Interstate 80 near Arlington on 22 April.
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The episode as NWS CYS wrote it up.
Strong winds reported in the North Snowy Range Foothills along Interstate 80 near Arlington on 22 April.
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 Apr 22, 10:30 AM MST, 2 hours 8 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Cheyenne WY 1130 AM MDT Mon Apr 22 2024 .KEY MESSAGES... - Elevated to high winds possible for areas west of the Laramie Range Monday afternoon. Low relative humidities will also lead to fire weather conditions in certain areas. - Relatively mild temperatures are expected for Wednesday and Thursday along with a chance of late day showers and thunderstorms. - Cooler and unsettled weather is likely for Friday and the weekend. && .SHORT TERM /THROUGH TUESDAY NIGHT/... Issued at 430 AM MDT Mon Apr 22 2024 An approaching cold front with jet energy aloft will lead to a windy day for areas west of the Laramie Range. Current observations show gusts between 30 and 40 MPH, but this will steadily increase through the morning hours, with the strongest winds expected this afternoon. Low-level MSLP and height gradients remain unremarkable with the progressive nature of this front. Even the GFS has backed off on 700 mb wind speeds from previous runs, only maxing out at about 45 kts. NBM continues to show strong winds gusts this afternoon at 45 to 50 MPH. The NBM also shows a roughly 70 percent chance around the Arlington/Elk Mountain area for 48 kt wind gusts. This is likely due to the potential for mountain wave activity as indicated by the omega field. Although the NBM might suggest high winds, in-house guidance for high winds only gives the usual wind prones a 20 percent chance of high winds. Given that this event is outside of the typical high wind season, it will likely be difficult to see widespread and frequent gusts over 58 MPH. However, it will still be very windy for areas out west with gusts of 40 to 55 MPH. Cannot rule out an occasional gust to 60 MPH, especially between Laramie and Rawlins along Interstate 80. With the approaching cold front from the north, the northern zones of the CWA will be a few degrees colder than Sunday. The southern portion of the CWA will be warmer as the FROPA doesn't occur until late Monday night/early Tuesday morning. Warmest temperatures will generally be along the Interstate 80 corridor. With the mild and windy conditions out west, fire weather conditions are also expected. Relative humidities will likely drop below 15 percent for areas out west. However, increased cloud cover from both mountain wave activity and the cold front may limit relative humidities from dropping below critical threshold. With the front through the CWA by Tuesday morning, expect a cooler but seasonable day across area. Highs will be in the 50s to low 60s. Increasing clouds are expected throughout the day with a weak disturbance approaching from the west. This will increase low-level moisture and may lead to some scattered showers and a few rumbles of thunder Tuesday evening into Tuesday night. && .LONG TERM /WEDNESDAY THROUGH SUNDAY/... Issued at 300 AM MDT Mon Apr 22 2024 CWA on the east side of a broad flat ridge located over western Wyoming Wednesday. Southerly low level winds east of the Laramie Range Wednesday morning transporting low level moisture into the Panhandle and eastern high plains. Ridge amplifies Wednesday afternoon...forcing the low level moisture eastward into central Nebraska through the afternoon. ECMWF and GFS showing some low QPF over the Laramie Range and west Wednesday afternoon...so can not rule out some scattered showers and isolated thunderstorms Wednesday. Overall...a pretty nice day with afternoon highs in the mid 70s across the Panhandle and upper 60s to low 70s in southeast Wyoming. Upper ridge axis shifts east Wednesday night into Thursday with the approach of next in series of upper shortwaves from the desert southwest. This system expected to bring increasing chances for showers and storms Thursday afternoon. This vort max shifts east Friday morning...but on it's heels is another vort max moving in from the west and southwest Friday afternoon. This system looks a bit more organized with a surface cold front and upper level jet support. Front looks to stall out near the Colorado/Wyoming state line Friday evening. Good chances for showers and storms (70-80 percent) coverage. Still a pretty warm system...with 700mb temperatures of +2C...so snow levels looking to be pretty high (8500 to 8800 feet). Right now...snow does not look to be an issue...but if system comes in colder...we may be dealing with heavy snow at some locations. Colder air arrives Sunday as a vertically stacked low tracks across southeast and east central Colorado. This may be the system that brings heavy snow to our CWA as 700mb temperatures fall to -4C to -6C. Stay tuned to later updates in the forecast. && .AVIATION /18Z TAFS THROUGH 18Z TUESDAY/... Issued at 1125 AM MDT Mon Apr 22 2024 Strong northwest flow aloft will continue as a cold front moves across the terminals, along with surface high pressure building across the area tonight. Scattered to broken clouds near 15000 feet will occur. Winds will gust up to 40 knots at Rawlins and Laramie until 02Z, and up to 25 knots at Cheyenne, Alliance and Sidney until 01Z. && .CYS WATCHES/WARNINGS/ADVISORIES... WY...Red Flag Warning until 7 PM MDT this evening for WYZ428. NE...None. && SHORT TERM...SF LONG TERM...GCC AVIATION...RUBIN
Hazardous Weather Outlook National Weather Service Cheyenne WY 224 AM MDT Mon Apr 22 2024 NEZ002-003-019>021-054-055-095-096-WYZ101>119-230830- Dawes County-Box Butte County-Scotts Bluff County-Banner County- Morrill County-Kimball County-Cheyenne County- Northern Sioux County-Southern Sioux County- 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- 224 AM MDT Mon Apr 22 2024 This hazardous weather outlook is for portions of panhandle Nebraska...east central Wyoming...south central Wyoming and southeast Wyoming. .DAY ONE...TODAY Strong, gusty winds expected for areas west of the Laramie Range. Wind gusts over 50 MPH possible. Cannot rule out an occasional gust to 60 MPH in the wind prone areas. A Red Flag Warning is in effect for the Laramie Valley for low relative humidities and strong winds. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SATURDAY Unsettled weather expected through the week with multiple chances for precipitation. .Spotter information statement... Spotter activation will not be needed.
Special Weather Statement National Weather Service Cheyenne WY 118 PM MDT Mon Apr 22 2024 WYZ110-116-230100- North Snowy Range Foothills-South Laramie Range- Including the cities of Arlington, Elk Mountain, Buford, Pumpkin Vine, and Vedauwoo 118 PM MDT Mon Apr 22 2024 ...LOCALLY STRONG GUSTY WINDS EXPECTED THIS AFTERNOON AND EARLY THIS EVENING ACROSS PORTIONS OF SOUTHEAST WYOMING... * WHAT...West winds of 25 to 35 MPH with occasional gusts up to 55 MPH. * WHERE...Mainly the wind prone locations of southeast Wyoming, including the Arlington area and the Interstate 80 Summit. * WHEN...Monday afternoon. * IMPACTS...If traveling, please be aware of localized and brief strong wind gusts along Interstate 80 between Elk Mountain and Cheyenne. Extra caution may be needed if traveling light-weight high profile vehicles, including campers. TT
The national radar mosaic for the moment the first event began.
1 high wind. Local standard time, as filed.
WYDOT sensor Halleck Ridge, located 7 miles northwest of Elk Mountain reported this peak wind gust.
After NWS Directive 10-1605, the rules offices file Storm Data by.
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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: 1164908.