Alert archive / Nebraska / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 87, NWS Cheyenne, WY

July 27, 2022Box Butte County, Dawes County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 27, 2022, 4:01 AM MDT for Box Butte County, Dawes County, Nebraska. It was in force for 26 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: Jul 27, 2022, 4:01 AM MDT (10:01 UTC)
Expired: Jul 27, 2022, 4:27 AM MDT
In force: 26 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Box Butte County, NE, Dawes County, NE

The radar

The Rapid City radar (KUDX), 185 km from the middle of the area, began a volume at 10:01 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 00:00Z, 10.0 hours before the alert went out and 256 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: 1899 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 1119 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: -125 m²/s²
0-3 km storm-relative helicity: -28 m²/s²
Significant tornado parameter: -0.4
Supercell composite: -3.7

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 Jul 27, 3:38 AM MDT, 23 minutes earlier.

Area forecast discussion, Jul 27, 3:38 AM MDT, 23 minutes before

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Hazardous weather outlook, Jul 27, 3:47 AM MDT, 14 minutes before

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In the hours before

Special weather statement, Jul 27, 3:12 AM MDT, 49 minutes before

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Special weather statement, Jul 27, 3:17 AM MDT, 44 minutes before

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Special weather statement, Jul 27, 3:38 AM MDT, 23 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
Jul 27, 3:17 AM MDT	Special Weather Statement	CYS	Niobrara	43 min
Jul 27, 4:03 AM MDT	Special Weather Statement	CYS	Niobrara	27 min
Jul 27, 6:44 AM MDT	Dense Fog Advisory	CYS	Laramie	2 hr
Jul 27, 4:26 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	19 min
Jul 27, 4:49 PM MDT	Special Weather Statement	CYS	Laramie	26 min
Jul 27, 5:04 PM MDT	Special Weather Statement	CYS	Laramie	26 min
Jul 27, 5:23 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	52 min
Jul 27, 5:42 PM MDT	Special Weather Statement	CYS	Laramie	33 min
Jul 27, 5:46 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	44 min
Jul 27, 3:12 AM MDT	Special Weather Statement	CYS	Box Butte	33 min
Jul 27, 3:38 AM MDT	Special Weather Statement	CYS	Sioux	37 min
Jul 27, 6:07 AM MDT	Special Weather Statement	CYS	Box Butte	23 min
Jul 27, 3:42 PM MDT	Special Weather Statement	CYS	Box Butte	33 min
Jul 27, 4:12 PM MDT	Special Weather Statement	CYS	Box Butte	33 min
Jul 27, 4:23 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Morrill	52 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2022 Every severe thunderstorm 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.