Alert archive / Wyoming / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 334, NWS Cheyenne, WY

August 2, 2023Laramie County, Wyoming

NWS Cheyenne, WY issued this severe thunderstorm warning at Aug 2, 2023, 4:50 PM MDT for Laramie County, Wyoming. It was in force for 40 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 2, 2023, 4:50 PM MDT (22:50 UTC)
Expired: Aug 2, 2023, 5:30 PM MDT
In force: 40 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Laramie County, WY

The radar

The Cheyenne radar (KCYS), 20 km from the middle of the area, began a volume at 22:49 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, 10.8 hours before the alert went out and 343 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: 5 J/kg
Mixed-layer CIN: -264 J/kg
Mixed-layer LCL: 1628 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -20 m²/s²
0-3 km storm-relative helicity: -9 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 2, 3:32 PM MDT, 1 hour 18 minutes earlier.

Area forecast discussion, Aug 2, 3:32 PM MDT, 1 hour 18 minutes before

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Hazardous weather outlook, Aug 2, 3:10 AM MDT, 13 hours 40 minutes before

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In the hours before

Special weather statement, Aug 2, 1:16 PM MDT, 3 hours 34 minutes before

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Special weather statement, Aug 2, 3:19 PM MDT, 1 hour 31 minutes before

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Special weather statement, Aug 2, 4:05 PM MDT, 45 minutes before

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Special weather statement, Aug 2, 4:14 PM MDT, 36 minutes before

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Special weather statement, Aug 2, 4:35 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 1, 7:01 PM MDT	Special Weather Statement	CYS	Platte	44 min
Aug 1, 7:21 PM MDT	Special Weather Statement	CYS	Platte	24 min
Aug 2, 2:28 AM MDT	Flood Watch	CYS	Albany, Carbon, Laramie, Platte	19 hr
Aug 2, 1:16 PM MDT	Special Weather Statement	CYS	Goshen	29 min
Aug 2, 2:00 PM MDT	Areal Flood Advisory	CYS	Platte	3 hr
Aug 2, 4:04 PM MDT	Areal Flood Advisory	CYS	Carbon	3 hr
Aug 2, 4:35 PM MDT	Special Weather Statement	CYS	Laramie	40 min
Aug 2, 5:20 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	40 min
Aug 2, 3:19 PM MDT	Special Weather Statement	CYS	Cheyenne	56 min
Aug 2, 3:57 PM MDT	Areal Flood Advisory	CYS	Cheyenne	3 hr
Aug 2, 4:05 PM MDT	Special Weather Statement	CYS	Banner	40 min
Aug 2, 4:14 PM MDT	Special Weather Statement	CYS	Cheyenne	46 min
Aug 2, 5:11 PM MDT	Special Weather Statement	CYS	Morrill	49 min
Aug 2, 5:38 PM MDT	Special Weather Statement	CYS	Dawes	37 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 2023 Every severe thunderstorm warning in 2023

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.