Alert archive / Wyoming / Snow Squall Warnings in 2022

Snow Squall Warning 9, NWS Cheyenne, WY

December 21, 2022Goshen County, Laramie County, Platte County, Wyoming

NWS Cheyenne, WY issued this snow squall warning at Dec 21, 2022, 3:11 PM MST for Goshen County, Laramie County, Platte County, Wyoming. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Dec 21, 2022, 3:11 PM MST (22:11 UTC)
Expired: Dec 21, 2022, 4:00 PM MST
In force: 49 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon

Counties Goshen County, WY, Laramie County, WY, Platte County, WY

The radar

The Cheyenne radar (KCYS), 78 km from the middle of the area, began a volume at 22:13 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

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 10.2 hours before the alert went out and 348 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 831 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 298 m²/s²
0-3 km storm-relative helicity: 302 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this snow squall warning 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 snow squall warning went out at Dec 21, 3:00 PM MST, 11 minutes earlier.

Area forecast discussion, Dec 21, 3:00 PM MST, 11 minutes before

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Hazardous weather outlook, Dec 21, 8:09 AM MST, 7 hours 2 minutes before

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In the hours before

Local storm report, Dec 21, 12:40 PM MST, 2 hours 31 minutes before

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Special weather statement, Dec 21, 12:55 PM MST, 2 hours 16 minutes before

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Local storm report, Dec 21, 1:40 PM MST, 1 hour 31 minutes before

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Local storm report, Dec 21, 2:19 PM MST, 52 minutes before

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Local storm report, Dec 21, 3:08 PM MST, 3 minutes before

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Special weather statement, Dec 21, 3:08 PM MST, 3 minutes before

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The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 21, 12:55 PM MST	Special Weather Statement	CYS	Platte	50 min
Dec 21, 1:53 PM MST	Snow Squall Warning	CYS	Carbon	52 min
Dec 21, 2:37 PM MST	Snow Squall Warning Significant damage threat	CYS	Albany, Carbon	38 min
Dec 21, 3:08 PM MST	Special Weather Statement	CYS	Laramie	37 min
Dec 21, 3:21 PM MST	Snow Squall Warning	CYS	Goshen	24 min
Dec 21, 3:42 PM MST	Snow Squall Warning	CYS	Goshen, Laramie	63 min

Nearby

Snow Squall Warnings in Wyoming, 2022 Every snow squall warning in 2022

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.