Alert archive / Wyoming / Winter Weather Advisories in 2021
Winter Weather Advisory 22, NWS Cheyenne, WY
NWS Cheyenne, WY issued this winter weather advisory at Mar 9, 2021, 1:25 AM MST for 6 counties in Wyoming; 5 counties in Nebraska. It took effect at Mar 9, 2021, 8:00 PM MST. It was in force for 21 hr.
The area
The counties it named.
The facts
- Issued
- Mar 9, 2021, 1:25 AM MST (08:25 UTC)
- In effect from
- Mar 9, 2021, 8:00 PM MST
- Expired
- Mar 10, 2021, 5:00 PM MST
- In force
- 21 hr
- Issued by
- NWS Cheyenne, WY
Counties Banner County, NE, Box Butte County, NE, Dawes County, NE, Scotts Bluff County, NE, Sioux County, NE, Albany County, WY, Carbon County, WY, Converse County, WY, Goshen County, WY, Laramie County, WY, Platte County, WY
The radar
The Cheyenne radar (KCYS), 104 km from the middle of the area, began a volume at 08:26 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 00:00Z, 8.4 hours before the alert went out and 259 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
- 2782 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 156 m²/s²
- 0-3 km storm-relative helicity
- 137 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this winter weather advisory went out, 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 this winter weather advisory went out at Mar 8, 10:30 PM MST, 2 hours 55 minutes earlier.
Area forecast discussion, Mar 8, 10:30 PM MST, 2 hours 55 minutes before
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<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
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The site you requested is temporarily down for maintenance or an unexpected outage.
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</html>The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 9, 1:25 AM MST | Winter Storm Warning | CYS | Albany, Carbon, Converse, Niobrara | 40 hr |
Nearby
Winter Weather Advisories in Wyoming, 2021Winter Weather Advisories in Nebraska, 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.