Alert archive / Wyoming / Wind Chill Warnings in 2018
Wind Chill Warning 2, NWS Cheyenne, WY
NWS Cheyenne, WY issued this wind chill warning at Feb 20, 2018, 2:40 AM MST for Albany County, Carbon County, Laramie County, Wyoming. It was in force for 5 hr. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Feb 20, 2018, 2:40 AM MST (09:40 UTC)
- Expired
- Feb 20, 2018, 8:00 AM MST
- In force
- 5 hr
- Issued by
- NWS Cheyenne, WY
Counties Albany County, WY, Carbon County, WY, Laramie County, WY
The radar
The Cheyenne radar (KCYS), 93 km from the middle of the area, began a volume at 09:39 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Feb 20, 6:00 AM MST | HEAVY SNOW 9 | N Sinclair, WY | SNOW TOTAL FOR YESTERDAYS STORM |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Riverton, WY (KRIW), launched 00:00Z, 9.7 hours before the alert went out and 274 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 923 m above ground
- 0-6 km bulk shear
- 76 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- -41 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
577 WWUS45 KCYS 200940 WSWCYS URGENT - WINTER WEATHER MESSAGE National Weather Service Cheyenne WY 240 AM MST Tue Feb 20 2018 ...HEAVY SNOWFALL ENDING ACROSS THE NORTHERN NEBRASKA PANHANDLE THIS MORNING... ...DANGEROUS WIND CHILL VALUES WITH INCREASED FROSTBITE POTENTIAL ACROSS PARTS OF SOUTHERN WYOMING THROUGH MID MORNING... NEZ002-003-095-096-201045- /O.CAN.KCYS.WS.W.0008.000000T0000Z-180220T1200Z/ Dawes-Box Butte-North Sioux-South Sioux- Including the cities of Chadron, Chadron St Park, Alliance, Harrison, and Agate 240 AM MST Tue Feb 20 2018 ...WINTER STORM WARNING IS CANCELLED... Heavier snow is moving east as the low pressure system that broughtthe snow continues to move into central Nebraska. Light snow will continue, but significant snow accumulations are no longer expected. $$ WYZ110-115>117-201500- /O.UPG.KCYS.WC.Y.0004.000000T0000Z-180220T1300Z/ /O.NEW.KCYS.WC.W.0002.180220T0940Z-180220T1500Z/ North Snowy Range Foothills-Laramie Valley-South Laramie Range- South Laramie Range Foothills- Including the cities of Arlington, Elk Mountain, Bosler, Laramie, Buford, Pumpkin Vine, Vedauwoo, Whitaker, Federal, and Horse Creek 240 AM MST Tue Feb 20 2018 ...WIND CHILL WARNING IN EFFECT UNTIL 8 AM MST THIS MORNING... * WHAT...Dangerously cold wind chills occurring. The dangerously cold wind chills will cause frostbite in as little as 10 minutes to exposed skin. Expect wind chills to range from 30 below zero to 40 below zero. * WHERE...Interstate 80 Summit west of Cheyenne through Arlington. * WHEN...Now to 8 AM this morning. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Wind Chill Warning means the combination of very cold air and the wind will create dangerously low wind chill values. Frost bite can occur quickly and even hypothermia or death if precautions are not taken. $$ WYZ101-102-107-108-201500- /O.EXB.KCYS.WC.Y.0004.000000T0000Z-180220T1500Z/ Converse County Lower Elevations-Niobrara County- East Platte County-Goshen County- Including the cities of Bill, Douglas, Deer Creek, Glenrock, Lusk, Redbird, Wheatland, Guernsey, and Torrington 240 AM MST Tue Feb 20 2018 ...WIND CHILL ADVISORY IN EFFECT UNTIL 8 AM MST THIS MORNING... * WHAT...Very cold wind chills expected. The cold wind chills will cause frostbite in as little as 30 minutes to exposed skin. Expect wind chills to range from 15 below zero to 25 below zero. * WHERE...Bill, Douglas, Wheatland, Lusk and Torrington. * WHEN...Now to 8 AM this morning. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Wind Chill Advisory means that cold air and the wind will combine to create low wind chills. Frost bite and hypothermia can occur if precautions are not taken. Make sure you wear a hat and gloves. $$ WYZ106-109-111>114-118-119-201500- /O.EXT.KCYS.WC.Y.0004.000000T0000Z-180220T1500Z/ Central Laramie Range and Southwest Platte County- Central Carbon County-Southwest Carbon County-Sierra Madre Range- Upper North Platte River Basin-Snowy Range-Central Laramie County- East Laramie County- Including the cities of Bordeaux, Rawlins, Baggs, Saratoga, Encampment, Centennial, Albany, Cheyenne, and Pine Bluffs 240 AM MST Tue Feb 20 2018 ...WIND CHILL ADVISORY NOW IN EFFECT UNTIL 8 AM MST THIS MORNING... * WHAT...Very cold wind chills expected. The cold wind chills will cause frostbite in as little as 30 minutes to exposed skin. Expect wind chills to range from 10 below zero to 25 below zero. * WHERE...South Central and Southeast Wyoming. * WHEN...Now to 8 AM this morning. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Wind Chill Advisory means that cold air and the wind will combine to create low wind chills. Frost bite and hypothermia can occur if precautions are not taken. Make sure you wear a hat and gloves. $$ NEZ019>021-054-055-201300- /O.CON.KCYS.WW.Y.0015.000000T0000Z-180220T1300Z/ Scotts Bluff-Banner-Morrill-Kimball-Cheyenne- Including the cities of Scottsbluff, Gering, Harrisburg, Angora, Bridgeport, Bayard, Redington, Kimball, Brownson, and Sidney 240 AM MST Tue Feb 20 2018 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MST EARLY THIS MORNING... * WHAT...Snow occurring. Plan on slippery road conditions. Additional snow accumulations of up to one inch are expected. * WHERE...Southern Nebraska Panhandle including Kimball and Sidney. * WHEN...Until 6 AM today. * ADDITIONAL DETAILS...Be prepared for reduced visibilities at times. Cold wind chills as low as 20 below zero will cause frostbite in as little as 30 minutes to exposed skin. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory for snow means periods of snow will cause primarily travel difficulties. Be prepared for snow covered roads and limited visibilities, and use caution while driving. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. $$
2 follow-up statements
286 WWUS45 KCYS 201240 WSWCYS URGENT - WINTER WEATHER MESSAGE National Weather Service Cheyenne WY 540 AM MST Tue Feb 20 2018 ...DANGEROUS WIND CHILL VALUES WITH INCREASED FROSTBITE POTENTIAL ACROSS PARTS OF SOUTHERN WYOMING THROUGH MID MORNING... NEZ019>021-054-055-201345- /O.EXP.KCYS.WW.Y.0015.000000T0000Z-180220T1300Z/ Scotts Bluff-Banner-Morrill-Kimball-Cheyenne- Including the cities of Scottsbluff, Gering, Harrisburg, Angora, Bridgeport, Bayard, Redington, Kimball, Brownson, and Sidney 540 AM MST Tue Feb 20 2018 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 6 AM MST EARLY THIS MORNING... Snow has ended for the most part across the southern Nebraska Panhandle and accumulating snow is no longer expected. Therefore, the Winter Weather Advisory will be allowed to expire on time at 6 AM this morning. $$ WYZ110-115>117-201500- /O.CON.KCYS.WC.W.0002.000000T0000Z-180220T1500Z/ North Snowy Range Foothills-Laramie Valley-South Laramie Range- South Laramie Range Foothills- Including the cities of Arlington, Elk Mountain, Bosler, Laramie, Buford, Pumpkin Vine, Vedauwoo, Whitaker, Federal, and Horse Creek 540 AM MST Tue Feb 20 2018 ...WIND CHILL WARNING REMAINS IN EFFECT UNTIL 8 AM MST THIS MORNING... * WHAT...Dangerously cold wind chills expected. The dangerously cold wind chills will cause frostbite in as little as 10 minutes to exposed skin. Expect wind chills to range from 15 below zero to 30 below zero. * WHERE...Interstate 80 Summit west of Cheyenne through Arlington. * WHEN...Now to 8 AM this morning. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Wind Chill Warning means the combination of very cold air and the wind will create dangerously low wind chill values. Frost bite can occur quickly and even hypothermia or death if precautions are not taken. $$ WYZ101-102-106>109-111>114-118-119-201500- /O.CON.KCYS.WC.Y.0004.000000T0000Z-180220T1500Z/ Converse County Lower Elevations-Niobrara County- Central Laramie Range and Southwest Platte County- East Platte County-Goshen County-Central Carbon County- Southwest Carbon County-Sierra Madre Range- Upper North Platte River Basin-Snowy Range-Central Laramie County- East Laramie County- Including the cities of Bill, Douglas, Deer Creek, Glenrock, Lusk, Redbird, Bordeaux, Wheatland, Guernsey, Torrington, Rawlins, Baggs, Saratoga, Encampment, Centennial, Albany, Cheyenne, and Pine Bluffs 540 AM MST Tue Feb 20 2018 ...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 8 AM MST THIS MORNING... * WHAT...Very cold wind chills expected. The cold wind chills will cause frostbite in as little as 30 minutes to exposed skin. Expect wind chills to range from 15 below zero to 24 below zero. * WHERE...Bill, Douglas, Wheatland, Lusk and Torrington. * WHEN...Now to 8 AM this morning. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Wind Chill Advisory means that cold air and the wind will combine to create low wind chills. Frost bite and hypothermia can occur if precautions are not taken. Make sure you wear a hat and gloves. $$
843 WWUS45 KCYS 201501 WSWCYS URGENT - WINTER WEATHER MESSAGE National Weather Service Cheyenne WY 801 AM MST Tue Feb 20 2018 WYZ110-115>117-201615- /O.EXP.KCYS.WC.W.0002.000000T0000Z-180220T1500Z/ North Snowy Range Foothills-Laramie Valley-South Laramie Range- South Laramie Range Foothills- Including the cities of Arlington, Elk Mountain, Bosler, Laramie, Buford, Pumpkin Vine, Vedauwoo, Whitaker, Federal, and Horse Creek 801 AM MST Tue Feb 20 2018 ...WIND CHILL WARNING WILL EXPIRE AT 8 AM MST THIS MORNING... Temperatures are warming slowly this morning and wind chills are rising as well. A few locations will still have very low wind chills for another hour or so, especially in the Laramie Valley. $$ WYZ101-102-106>109-111>114-118-119-201615- /O.EXP.KCYS.WC.Y.0004.000000T0000Z-180220T1500Z/ Converse County Lower Elevations-Niobrara County- Central Laramie Range and Southwest Platte County- East Platte County-Goshen County-Central Carbon County- Southwest Carbon County-Sierra Madre Range- Upper North Platte River Basin-Snowy Range-Central Laramie County- East Laramie County- Including the cities of Bill, Douglas, Deer Creek, Glenrock, Lusk, Redbird, Bordeaux, Wheatland, Guernsey, Torrington, Rawlins, Baggs, Saratoga, Encampment, Centennial, Albany, Cheyenne, and Pine Bluffs 801 AM MST Tue Feb 20 2018 ...WIND CHILL ADVISORY WILL EXPIRE AT 8 AM MST THIS MORNING... Temperatures are warming slowly this morning and wind chills are rising as well. $$
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 19, 10:17 PM MST | Wind Chill Advisory | CYS | Albany, Carbon, Converse, Goshen, Laramie, Niobrara and 1 more | 10 hr |
| Feb 20, 12:45 PM MST | Wind Chill Advisory | CYS | Albany, Carbon, Converse, Goshen, Niobrara, Platte | 20 hr |
Nearby
Wind Chill Warnings in Wyoming, 2018Every wind chill warning in 2018
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.