Alert archive / Nebraska / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 131, NWS Cheyenne, WY

August 6, 2020Kimball County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Aug 6, 2020, 2:35 PM MDT for Kimball County, Nebraska. 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 6, 2020, 2:35 PM MDT (20:35 UTC)
Expired
Aug 6, 2020, 3:15 PM MDT
In force
40 min
Issued by
NWS Cheyenne, WY
Area
Storm-based polygon
Hail
1.25 in
Wind
60.0 mph

County Kimball County, NE

The radar

The Cheyenne radar (KCYS), 91 km from the middle of the area, began a volume at 20:34 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

Denver, CO (KDNR), launched 12:00Z, 8.6 hours before the alert went out and 153 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-pSkew-T log-p diagram, Denver, CO at 12:00Z on 2020-08-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 116 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 12:00Z on 2020-08-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
116 J/kg
Mixed-layer CIN
-360 J/kg
Mixed-layer LCL
2239 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
3 m²/s²
0-3 km storm-relative helicity
53 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 6, 11:35 AM MDT, 3 hours earlier.

Area forecast discussion, Aug 6, 11:35 AM MDT, 3 hours before
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Hazardous weather outlook, Aug 6, 4:09 AM MDT, 10 hours 26 minutes before
Hazardous Weather Outlook
National Weather Service Cheyenne WY
409 AM MDT Thu Aug 6 2020

WYZ104-105-109>115-071015-
Ferris/Seminoe/Shirley Mountains-Shirley Basin-
Central Carbon County-North Snowy Range Foothills-
Southwest Carbon County-Sierra Madre Range-
Upper North Platte River Basin-Snowy Range-Laramie Valley-
409 AM MDT Thu Aug 6 2020

This hazardous weather outlook is for portions of south central
Wyoming and southeast Wyoming.

.DAY ONE...TODAY AND TONIGHT

Dry and breezy conditions expected with fire weather conditions
the primary concern. A Red Flag Warning is in place today.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

Red Flag Warning is in place Friday, with more warnings likely
over the course of the next week.

.Spotter information statement...

Spotter activation will not be required.

NEZ002-003-019>021-054-055-095-096-WYZ101>103-106>108-116>119-
071015-
Dawes-Box Butte-Scotts Bluff County-Banner County-Morrill-
Kimball County-Cheyenne-North Sioux-South Sioux-
Converse County Lower Elevations-Niobrara County-
North Laramie Range-
Central Laramie Range and Southwest Platte County-
East Platte County-Goshen County-South Laramie Range-
South Laramie Range Foothills-Central Laramie County-
East Laramie County-
409 AM MDT Thu Aug 6 2020

This hazardous weather outlook is for portions of panhandle
Nebraska...western Nebraska...east central Wyoming and southeast
Wyoming.

.DAY ONE...TODAY AND TONIGHT

Scattered afternoon and evening thunderstorms will develop
Thursday; some may be strong to severe. Strong winds will be the
primary threat, with large hail possible over east-central
Wyoming and the western Nebraska Panhandle.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

Storms become isolated and confined to the mountains Friday and
Saturday. Fire weather concerns beginning Friday for areas along
and near the Laramie Range.

.Spotter information statement...

Spotter activation will not be required.

In the hours before

Special weather statement, Aug 6, 1:28 PM MDT, 1 hour 7 minutes before
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Special weather statement, Aug 6, 2:26 PM MDT, 9 minutes before
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Special weather statement, Aug 6, 2:31 PM MDT, 4 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 5, 7:09 PM MDTSpecial Weather StatementCYSNiobrara51 min
Aug 5, 7:55 PM MDTSpecial Weather StatementCYSNiobrara50 min
Aug 5, 8:30 PM MDTSevere Thunderstorm WarningCYSNiobrara45 min
Aug 6, 3:08 AM MDTRed Flag WarningCYS41 hr
Aug 6, 1:28 PM MDTSpecial Weather StatementCYSLaramie47 min
Aug 6, 2:31 PM MDTSpecial Weather StatementCYSLaramie44 min
Aug 6, 2:42 PM MDTSpecial Weather StatementCYSNiobrara48 min
Aug 6, 3:30 PM MDTSpecial Weather StatementCYSNiobrara45 min
Aug 6, 4:19 PM MDTSpecial Weather StatementCYSGoshen41 min
Aug 6, 4:29 PM MDTSevere Thunderstorm WarningCYSGoshen, Platte26 min
Aug 6, 5:42 PM MDTSevere Thunderstorm WarningCYSGoshen, Niobrara33 min
Aug 5, 6:11 PM MDTSpecial Weather StatementCYSMorrill49 min
Aug 5, 6:13 PM MDTSevere Thunderstorm WarningCYSMorrill18 min
Aug 5, 6:18 PM MDTSpecial Weather StatementCYSDawes42 min
Aug 5, 6:50 PM MDTSpecial Weather StatementCYSScotts Bluff40 min
Aug 5, 7:37 PM MDTSpecial Weather StatementCYSCheyenne38 min
Aug 5, 7:52 PM MDTSevere Thunderstorm WarningCYSCheyenne27 min
Aug 5, 7:57 PM MDTSpecial Weather StatementCYSSioux48 min
Aug 5, 9:00 PM MDTSpecial Weather StatementCYSDawes45 min
Aug 5, 9:39 PM MDTSpecial Weather StatementCYSDawes51 min
Aug 5, 10:16 PM MDTSpecial Weather StatementCYSBox Butte59 min
Aug 5, 10:19 PM MDTSpecial Weather StatementCYSDawes56 min
Aug 5, 11:15 PM MDTSpecial Weather StatementCYSMorrill45 min
Aug 6, 2:26 PM MDTSpecial Weather StatementCYSKimball49 min
Aug 6, 3:10 PM MDTSpecial Weather StatementCYSBanner50 min
Aug 6, 3:16 PM MDTSpecial Weather StatementCYSKimball44 min
Aug 6, 3:36 PM MDTSpecial Weather StatementCYSSioux39 min
Aug 6, 3:51 PM MDTSpecial Weather StatementCYSBanner39 min
Aug 6, 4:33 PM MDTSpecial Weather StatementCYSSioux42 min
Aug 6, 5:14 PM MDTSpecial Weather StatementCYSCheyenne46 min
Aug 6, 5:30 PM MDTSpecial Weather StatementCYSSioux45 min
Aug 6, 5:46 PM MDTSpecial Weather StatementCYSCheyenne44 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2020Every severe thunderstorm warning in 2020

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.