Alert archive / Wyoming / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 280, NWS Cheyenne, WY

August 22, 2026Laramie County, Wyoming; Kimball County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Aug 22, 2026, 6:10 PM MDT for Laramie County, Wyoming; Kimball County, Nebraska. It was in force for 50 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: Aug 22, 2026, 6:10 PM MDT (00:10 UTC)
Expired: Aug 22, 2026, 7:00 PM MDT
In force: 50 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Kimball County, NE, Laramie County, WY

The radar

The Cheyenne radar (KCYS), 52 km from the middle of the area, began a volume at 00:14 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

Riverton, WY (KRIW), launched 00:00Z, 0.2 hours before the alert went out and 401 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: 103 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 2708 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 89 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 severe thunderstorm 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 severe thunderstorm warning went out at Aug 22, 5:30 PM MDT, 40 minutes earlier.

Area forecast discussion, Aug 22, 5:30 PM MDT, 40 minutes before

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In the hours before

Special weather statement, Aug 22, 5:02 PM MDT, 1 hour 8 minutes before

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Local storm report, Aug 22, 5:03 PM MDT, 1 hour 7 minutes before

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Local storm report, Aug 22, 5:22 PM MDT, 48 minutes before

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Special weather statement, Aug 22, 5:33 PM MDT, 37 minutes before

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Local storm report, Aug 22, 5:44 PM MDT, 26 minutes before

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Special weather statement, Aug 22, 5:55 PM MDT, 15 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
Aug 22, 6:02 PM MDT	Special Weather Statement	CYS	Converse	43 min
Aug 22, 6:05 PM MDT	Areal Flood Advisory	CYS	Albany, Converse	115 min
Aug 22, 6:13 PM MDT	Severe Thunderstorm Warning	CYS	Converse, Niobrara	47 min
Aug 22, 7:25 PM MDT	Severe Thunderstorm Warning	CYS	Converse	38 min
Aug 22, 9:18 PM MDT	Special Weather Statement	CYS	Converse	42 min
Aug 22, 9:39 PM MDT	Severe Thunderstorm Warning	CYS	Converse	51 min
Aug 22, 9:45 PM MDT	Special Weather Statement	CYS	Laramie	45 min
Aug 23, 5:19 PM MDT	Special Weather Statement	CYS	Carbon	26 min
Aug 22, 6:32 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne, Kimball	43 min
Aug 22, 6:45 PM MDT	Severe Thunderstorm Warning	CYS	Banner, Kimball	30 min
Aug 22, 7:08 PM MDT	Severe Thunderstorm Warning	CYS	Banner, Cheyenne, Kimball, Morrill	52 min
Aug 23, 1:38 PM MDT	Special Weather Statement	CYS	Dawes	52 min
Aug 23, 1:52 PM MDT	Severe Thunderstorm Warning	CYS	Dawes	38 min
Aug 23, 2:25 PM MDT	Severe Thunderstorm Warning	CYS	Dawes	50 min
Aug 23, 3:01 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Dawes	41 min
Aug 23, 3:39 PM MDT	Special Weather Statement	CYS	Box Butte	36 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 2026 Severe Thunderstorm Warnings in Nebraska, 2026 Every severe thunderstorm warning in 2026

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.