Alert archive / Nebraska / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 243, NWS Cheyenne, WY

July 15, 2019Dawes County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 15, 2019, 7:12 PM MDT for Dawes County, Nebraska. It was in force for 33 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 15, 2019, 7:12 PM MDT (01:12 UTC)
Expired: Jul 15, 2019, 7:45 PM MDT
In force: 33 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Dawes County, NE

The radar

The Rapid City radar (KUDX), 158 km from the middle of the area, began a volume at 01:13 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 15, 2:54 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Rapid City, SD (KUNR), launched 00:00Z, 1.2 hours before the alert went out and 152 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: 925 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 1939 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 96 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.4

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 15, 7:10 PM MDT, 2 minutes earlier.

Area forecast discussion, Jul 15, 7:10 PM MDT, 2 minutes before

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Hazardous weather outlook, Jul 15, 12:51 PM MDT, 6 hours 21 minutes before

Hazardous Weather Outlook
National Weather Service Cheyenne WY
1251 PM MDT Mon Jul 15 2019

NEZ002-003-019>021-054-055-095-096-WYZ101>119-161900-
Dawes-Box Butte-Scotts Bluff-Banner-Morrill-Kimball-Cheyenne-
North Sioux-South Sioux-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-
1251 PM MDT Mon Jul 15 2019

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

There is a marginal risk of severe thunderstorms this afternoon
and evening east of a Laramie to Cheyenne line, with a slight risk
of severe thunderstorms east of a Douglas to Kimball line.

Isolated to scattered thunderstorms will develop this afternoon
and evening. Some of the thunderstorms, especially in the slight
risk area, will likely become strong to severe, producing either
large hail or damaging winds.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

A few thunderstorms may become strong to severe Tuesday afternoon
and evening north of a Lusk to Alliance line. Thunderstorms will
be possible again Wednesday, Saturday and Sunday afternoons and
evenings.

.Spotter information statement...

Spotter activation will not be needed.

Rubin

In the hours before

Special weather statement, Jul 15, 6:29 PM MDT, 43 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
629 PM MDT Mon Jul 15 2019

WYZ102-160100-
Niobrara County-
629 PM MDT Mon Jul 15 2019

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN NIOBRARA COUNTY...

At 629 PM MDT, a strong thunderstorm was located near Redbird, or 22
miles west of Edgemont, moving east at 45 mph.

Winds in excess of 30 mph and pea size hail are possible with this
storm.

Locations impacted include...
Mule Creek Junction and Redbird.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 4332 10406 4326 10405 4320 10433 4337 10441
      4349 10406
TIME...MOT...LOC 0029Z 249DEG 39KT 4331 10428

Braun

Local storm report, Jul 15, 6:39 PM MDT, 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
639 PM MDT MON JUL 15 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0628 PM     TSTM WND GST     8 N HENRY               42.11N 104.05W
07/15/2019  E55 MPH          SIOUX              NE   PUBLIC

&&

MB

Local storm report, Jul 15, 6:41 PM MDT, 31 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
641 PM MDT MON JUL 15 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0621 PM     TSTM WND GST     2 E TORRINGTON          42.06N 104.15W
07/15/2019  M54 MPH          GOSHEN             WY   ASOS

            ASOS STATION KTOR AT TORRINGTON MUNICIPAL
            AIRPORT.

&&

MB

Special weather statement, Jul 15, 6:42 PM MDT, 30 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
642 PM MDT Mon Jul 15 2019

NEZ003-019-021-096-WYZ108-160115-
Scotts Bluff NE-Box Butte NE-Morrill NE-South Sioux NE-
Goshen County WY-
642 PM MDT Mon Jul 15 2019

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN BOX BUTTE...
NORTHEASTERN SCOTTS BLUFF...NORTHWESTERN MORRILL...SOUTHERN SIOUX AND
NORTHEASTERN GOSHEN COUNTIES UNTIL 715 PM MDT...

At 641 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 11 miles northeast of Torrington to near Lake
Alice. Movement was east-northeast at 35 mph.

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

Locations impacted include...
Kilpatrick Lake and Lake Alice.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 4235 10370 4203 10313 4192 10365 4221 10416
TIME...MOT...LOC 0041Z 255DEG 32KT 4222 10408 4194 10359

Jamski

Local storm report, Jul 15, 6:51 PM MDT, 21 minutes before

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Special weather statement, Jul 15, 6:57 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
Jul 15, 6:01 PM MDT	Special Weather Statement	CYS	Goshen	29 min
Jul 15, 6:14 PM MDT	Severe Thunderstorm Warning	CYS	Goshen	31 min
Jul 15, 6:29 PM MDT	Special Weather Statement	CYS	Niobrara	31 min
Jul 16, 1:29 PM MDT	Special Weather Statement	CYS	Goshen	61 min
Jul 16, 2:08 PM MDT	Special Weather Statement	CYS	Laramie	67 min
Jul 16, 3:08 PM MDT	Special Weather Statement	CYS	Laramie	52 min
Jul 16, 3:18 PM MDT	Special Weather Statement	CYS	Niobrara	42 min
Jul 16, 3:33 PM MDT	Special Weather Statement	CYS	Goshen	42 min
Jul 16, 3:39 PM MDT	Special Weather Statement	CYS	Platte	51 min
Jul 16, 3:49 PM MDT	Special Weather Statement	CYS	Laramie	41 min
Jul 16, 4:01 PM MDT	Special Weather Statement	CYS	Platte	44 min
Jul 16, 4:19 PM MDT	Special Weather Statement	CYS	Niobrara	41 min
Jul 16, 4:29 PM MDT	Severe Thunderstorm Warning	CYS	Converse, Niobrara	31 min
Jul 16, 4:41 PM MDT	Special Weather Statement	CYS	Niobrara	34 min
Jul 16, 4:56 PM MDT	Severe Thunderstorm Warning	CYS	Converse, Niobrara	33 min
Jul 16, 4:59 PM MDT	Special Weather Statement	CYS	Converse	31 min
Jul 16, 5:02 PM MDT	Special Weather Statement	CYS	Niobrara	28 min
Jul 16, 5:21 PM MDT	Special Weather Statement	CYS	Niobrara	24 min
Jul 16, 5:25 PM MDT	Severe Thunderstorm Warning	CYS	Niobrara	35 min
Jul 16, 5:45 PM MDT	Special Weather Statement	CYS	Niobrara	30 min
Jul 15, 6:16 PM MDT	Severe Thunderstorm Warning	CYS	Scotts Bluff	29 min
Jul 15, 6:25 PM MDT	Special Weather Statement	CYS	Sioux	35 min
Jul 15, 6:42 PM MDT	Special Weather Statement	CYS	Scotts Bluff	33 min
Jul 15, 6:43 PM MDT	Severe Thunderstorm Warning	CYS	Morrill, Scotts Bluff	19 min
Jul 15, 6:57 PM MDT	Special Weather Statement	CYS	Dawes	33 min
Jul 15, 7:44 PM MDT	Special Weather Statement	CYS	Dawes	31 min
Jul 15, 7:45 PM MDT	Special Weather Statement	CYS	Box Butte	30 min
Jul 15, 9:37 PM MDT	Special Weather Statement	CYS	Cheyenne	38 min
Jul 15, 9:52 PM MDT	Special Weather Statement	CYS	Box Butte	38 min
Jul 15, 9:54 PM MDT	Special Weather Statement	CYS	Morrill	21 min
Jul 15, 9:57 PM MDT	Special Weather Statement	CYS	Cheyenne	33 min
Jul 15, 10:10 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne	21 min
Jul 16, 3:12 PM MDT	Special Weather Statement	CYS	Scotts Bluff	48 min
Jul 16, 4:14 PM MDT	Special Weather Statement	CYS	Scotts Bluff	46 min
Jul 16, 4:15 PM MDT	Special Weather Statement	CYS	Kimball	45 min
Jul 16, 4:58 PM MDT	Severe Thunderstorm Warning	CYS	Banner, Box Butte, Morrill, Scotts Bluff	32 min
Jul 16, 5:28 PM MDT	Severe Thunderstorm Warning	CYS	Morrill	32 min
Jul 16, 5:56 PM MDT	Special Weather Statement	CYS	Morrill	49 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2019 Every severe thunderstorm warning in 2019

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.