Alert archive / Nebraska / Winter Weather Advisories in 2021
Winter Weather Advisory 21, NWS Cheyenne, WY
NWS Cheyenne, WY issued this winter weather advisory at Feb 27, 2021, 1:00 PM MST for Dawes County, Sioux County, Nebraska; Albany County, Carbon County, Wyoming. It took effect at Feb 27, 2021, 4:32 PM MST. It was in force for 12 hr.
The area
The counties it named.
The facts
- Issued
- Feb 27, 2021, 1:00 PM MST (20:00 UTC)
- In effect from
- Feb 27, 2021, 4:32 PM MST
- Expired
- Feb 28, 2021, 5:00 AM MST
- In force
- 12 hr
- Issued by
- NWS Cheyenne, WY
Counties Dawes County, NE, Sioux County, NE, Albany County, WY, Carbon County, WY
The radar
The Cheyenne radar (KCYS), 110 km from the middle of the area, began a volume at 19:57 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.
The nearest sounding before it
Rapid City, SD (KUNR), launched 12:00Z, 8.0 hours before the alert went out and 269 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
- 2432 m above ground
- 0-6 km bulk shear
- 67 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 81 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
709 WWUS45 KCYS 272000 WSWCYS URGENT - WINTER WEATHER MESSAGE National Weather Service Cheyenne WY 100 PM MST Sat Feb 27 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 AM MST SUNDAY... NEZ002-095-281200- /O.NEW.KCYS.WW.Y.0021.210228T0000Z-210228T1200Z/ Dawes-North Sioux- Including the cities of Chadron, Chadron St Park, and Harrison 100 PM MST Sat Feb 27 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 AM MST SUNDAY... * WHAT...Snow and blowing snow expected. Total snow accumulations of 1 to 4 inches, heaviest along the Pine Ridge. * WHERE...North Sioux County and Dawes County including Chadron and Harrison. * WHEN...From 5 PM this afternoon to 5 AM MST Sunday. * IMPACTS...Plan on slippery road conditions. Patchy blowing snow will reduce visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$
3 follow-up statements
980 WWUS45 KCYS 272031 WSWCYS URGENT - WINTER WEATHER MESSAGE National Weather Service Cheyenne WY 131 PM MST Sat Feb 27 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 AM MST SUNDAY... NEZ002-095-281200- /O.CON.KCYS.WW.Y.0021.210228T0000Z-210228T1200Z/ Dawes-North Sioux- Including the cities of Chadron, Chadron St Park, and Harrison 131 PM MST Sat Feb 27 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 AM MST SUNDAY... * WHAT...Snow and blowing snow expected. Total snow accumulations of 1 to 4 inches, heaviest along the Pine Ridge. Winds gusting to 25 mph. * WHERE...North Sioux County and Dawes County including Chadron and Harrison. * WHEN...From 5 PM this afternoon to 5 AM MST Sunday. * IMPACTS...Plan on slippery road conditions. Patchy blowing snow will reduce visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$
343 WWUS45 KCYS 272332 WSWCYS URGENT - WINTER WEATHER MESSAGE National Weather Service Cheyenne WY 432 PM MST Sat Feb 27 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 AM MST SUNDAY... WYZ110-281200- /O.EXB.KCYS.WW.Y.0021.210227T2332Z-210228T1200Z/ North Snowy Range Foothills- Including the cities of Arlington and Elk Mountain 432 PM MST Sat Feb 27 2021 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 5 AM MST SUNDAY... * WHAT...Snow and blowing snow. Additional snow accumulations of up to one inch. Winds gusting as high as 45 mph. * WHERE...The I-80 corridor Arlington to Elk Mountain, between Rawlins and Laramie. * WHEN...Until 5 AM MST Sunday. * IMPACTS...Plan on slippery road conditions. Patchy blowing snow could significantly reduce visibility, down to a quarter mile at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ NEZ002-095-281200- /O.CON.KCYS.WW.Y.0021.210228T0000Z-210228T1200Z/ Dawes-North Sioux- Including the cities of Chadron, Chadron St Park, and Harrison 432 PM MST Sat Feb 27 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST SUNDAY... * WHAT...Snow and blowing snow expected. Total snow accumulations of 1 to 4 inches, heaviest along the Pine Ridge. Winds gusting to 25 mph. * WHERE...North Sioux County and Dawes County including Chadron and Harrison. * WHEN...From 5 PM this afternoon to 5 AM MST Sunday. * IMPACTS...Plan on slippery road conditions. Patchy blowing snow will reduce visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ Braun
797 WWUS45 KCYS 281157 WSWCYS URGENT - WINTER WEATHER MESSAGE National Weather Service Cheyenne WY 457 AM MST Sun Feb 28 2021 NEZ002-095-281300- /O.EXP.KCYS.WW.Y.0021.000000T0000Z-210228T1200Z/ Dawes-North Sioux- Including the cities of Chadron, Chadron St Park, and Harrison 457 AM MST Sun Feb 28 2021 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 5 AM MST EARLY THIS MORNING... Periods of snow will continue this morning. However, any additional accumulations are expected to be light. Travel will remain hazardous due to icy and snow covered roads. $$ WYZ110-281300- /O.EXP.KCYS.WW.Y.0021.000000T0000Z-210228T1200Z/ North Snowy Range Foothills- Including the cities of Arlington and Elk Mountain 457 AM MST Sun Feb 28 2021 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 5 AM MST EARLY THIS MORNING... Blowing snow has ended. However, travel may remain hazardous due to slick spots on roadways. $$ CLH
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 27, 3:06 AM MST | High Wind Watch | CYS | Albany, Carbon, Laramie, Platte | 24 hr |
Nearby
Winter Weather Advisories in Nebraska, 2021Winter Weather Advisories in Wyoming, 2021Every winter weather advisory in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.