Alert archive / Nebraska / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 141, NWS Cheyenne, WY

August 12, 2020Box Butte County, Dawes County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Aug 12, 2020, 4:32 PM 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: Aug 12, 2020, 4:32 PM MDT (22:32 UTC)
Expired: Aug 12, 2020, 4:58 PM MDT
In force: 26 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 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 22:34 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.

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 12, 2:35 PM MDT, 1 hour 57 minutes earlier.

Area forecast discussion, Aug 12, 2:35 PM MDT, 1 hour 57 minutes before

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Hazardous weather outlook, Aug 12, 5:58 AM MDT, 10 hours 34 minutes before

Hazardous Weather Outlook
National Weather Service Cheyenne WY
558 AM MDT Wed Aug 12 2020

WYZ101>119-131200-
Converse County Lower Elevations-Niobrara County-
North Laramie Range-Ferris/Seminoe/Shirley Mountains-
Shirley Basin-Central Laramie Range and Southwest Platte County-
East Platte County-Goshen County-Central Carbon County-
North Snowy Range Foothills-Southwest Carbon County-
Sierra Madre Range-Upper North Platte River Basin-Snowy Range-
Laramie Valley-South Laramie Range-South Laramie Range Foothills-
Central Laramie County-East Laramie County-
558 AM MDT Wed Aug 12 2020

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

.DAY ONE...TODAY AND TONIGHT

Gusty winds...hot temperatures and low humidity will create
critical fire weather conditions late this morning that will
continue through the afternoon. Red Flag Warnings are in effect
for the entire area of southeast Wyoming today.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

Widespread critical fire weather conditions expected again
Thursday. A Fire Weather Watch is in effect for the entire
southeast Wyoming area.

Critical fire weather conditions continue on a daily basis through
the weekend...particularly along and west of the Laramie Range.

.Spotter information statement...

Spotter activation will not be needed.

NEZ002-003-019>021-054-055-095-096-131200-
Dawes-Box Butte-Scotts Bluff County-Banner County-Morrill-
Kimball County-Cheyenne-North Sioux-South Sioux-
558 AM MDT Wed Aug 12 2020

This hazardous weather outlook is for portions of panhandle
Nebraska and western Nebraska.

.DAY ONE...TODAY AND TONIGHT

Isolated thunderstorms are possible across the Nebraska Panhandle
this afternoon. One or two storms could become severe with large
hail and damaging downburst winds from 4 PM through 8 PM this
afternoon.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

Widespread critical fire weather conditions expected
Thursday...mainly across the northern and central portions of the
Panhandle. A Fire Weather Watch is in effect for the this area of
the Panhandle.

.Spotter information statement...

Spotter activation may be needed for the Panhandle from 4 PM this
afternoon through 8 PM this evening.

In the hours before

Special weather statement, Aug 12, 4:02 PM MDT, 30 minutes before

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Special weather statement, Aug 12, 4:15 PM MDT, 17 minutes before

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Special weather statement, Aug 12, 4:24 PM MDT, 8 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
424 PM MDT Wed Aug 12 2020

NEZ002-003-122315-
Box Butte NE-Dawes NE-
424 PM MDT Wed Aug 12 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL BOX BUTTE AND
SOUTHEASTERN DAWES COUNTIES UNTIL 515 PM MDT...

At 423 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles southwest of White Clay to 9 miles
northeast of Flahertys Corner. Movement was east at 20 mph.

Nickel size hail and wind gusts of 50 to 55 mph will be possible with
these storms.

Strong thunderstorms will be near...
  Box Butte Campground around 450 PM MDT.
  Box Butte Dam around 500 PM MDT.
  Hemingford around 505 PM MDT.

Other locations impacted by these storms include Marsland and Chadron
St Park.

LAT...LON 4229 10299 4245 10344 4296 10280 4279 10279
      4278 10277 4244 10277
TIME...MOT...LOC 2223Z 287DEG 16KT 4294 10266 4241 10332

Rubin

Special weather statement, Aug 12, 4:29 PM MDT, 3 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
429 PM MDT Wed Aug 12 2020

NEZ020-021-054-055-122315-
Kimball NE-Cheyenne NE-Morrill NE-Banner NE-
429 PM MDT Wed Aug 12 2020

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN CHEYENNE...SOUTHEASTERN
KIMBALL...SOUTH CENTRAL MORRILL AND SOUTHEASTERN BANNER COUNTIES
UNTIL 515 PM MDT...

At 428 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 10 miles south of Redington to near Potter.
Movement was east at 20 mph.

Penny size hail and wind gusts of 50 to 55 mph will be possible with
these storms.

Strong thunderstorms will be near...
  Brownson around 510 PM MDT.

This includes Interstate 80 in Nebraska between mile markers 34 and
56.

LAT...LON 4144 10337 4146 10299 4100 10303 4100 10347
TIME...MOT...LOC 2228Z 266DEG 16KT 4144 10329 4116 10332

Rubin

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 11, 6:12 PM MDT	Special Weather Statement	CYS		93 min
Aug 12, 2:07 AM MDT	Fire Weather Watch	CYS		12 hr
Aug 12, 2:05 PM MDT	Red Flag Warning	CYS		30 hr
Aug 12, 4:02 PM MDT	Special Weather Statement	CYS	Box Butte, Dawes, Sioux	73 min
Aug 12, 4:15 PM MDT	Special Weather Statement	CYS	Morrill	45 min
Aug 12, 4:24 PM MDT	Special Weather Statement	CYS	Dawes	51 min
Aug 12, 4:29 PM MDT	Special Weather Statement	CYS	Cheyenne	46 min
Aug 12, 5:34 PM MDT	Special Weather Statement	CYS	Box Butte	41 min
Aug 12, 5:45 PM MDT	Special Weather Statement	CYS	Kimball	45 min
Aug 12, 5:51 PM MDT	Special Weather Statement	CYS	Cheyenne	39 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2020 Every 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; radar from the NEXRAD Level II archive.