Alert archive / Nebraska / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 20, NWS Cheyenne, WY

May 14, 2019Sioux County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at May 14, 2019, 5:59 PM MDT for Sioux County, Nebraska. It was in force for 46 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: May 14, 2019, 5:59 PM MDT (23:59 UTC)
Expired: May 14, 2019, 6:45 PM MDT
In force: 46 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

County Sioux County, NE

The radar

The Cheyenne radar (KCYS), 172 km from the middle of the area, began a volume at 00:00 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 (KDEN), launched 12:00Z, 12.0 hours before the alert went out and 294 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2846 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 93 m²/s²
0-3 km storm-relative helicity: 85 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 May 14, 5:53 PM MDT, 6 minutes earlier.

Area forecast discussion, May 14, 5:53 PM MDT, 6 minutes before

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Hazardous weather outlook, May 14, 3:05 PM MDT, 2 hours 54 minutes before

Hazardous Weather Outlook
National Weather Service Cheyenne WY
305 PM MDT Tue May 14 2019

NEZ002-003-019>021-054-055-095-096-WYZ101>103-106>108-116>119-
152115-
Dawes-Box Butte-Scotts Bluff-Banner-Morrill-Kimball-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-
305 PM MDT Tue May 14 2019

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

Isolated to widely scattered showers and thunderstorms are
expected this afternoon and evening. Severe weather is not
expected. However, a few storms may produce gusty winds in excess
of 50 MPH.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

Cooler temperatures will return late in the week and snow
potential for the high mountains will increase.

.Spotter information statement...

Spotter activation will not be needed.

WYZ104-105-109>115-152115-
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-
305 PM MDT Tue May 14 2019

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

Isolated to widely scattered showers and thunderstorms are
expected this afternoon and evening. Severe weather is not
expected. However, a few storms may produce gusty winds in excess
of 50 MPH.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

Strong to severe thunderstorms are possible across the high plains
of southeast Wyoming and the western Nebraska Panhandle on
Thursday afternoon and evening.

.Spotter information statement...

Spotter activation could be needed Thursday evening.

In the hours before

Special weather statement, May 14, 3:04 PM MDT, 2 hours 55 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
304 PM MDT Tue May 14 2019

NEZ002-142130-
Dawes NE-
304 PM MDT Tue May 14 2019

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL DAWES COUNTY UNTIL 330 PM
MDT...

At 303 PM MDT, Doppler radar was tracking a strong thunderstorm near
Whitney Lake, or 15 miles southwest of Chadron, moving east at 20
mph.

Penny size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Red Cloud Campground, Chadron Campground and Chadron St Park.

LAT...LON 4264 10336 4276 10335 4281 10291 4257 10291
TIME...MOT...LOC 2103Z 269DEG 18KT 4269 10325

Brothers

Special weather statement, May 14, 3:32 PM MDT, 2 hours 27 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
332 PM MDT Tue May 14 2019

NEZ002-142200-
Dawes-
332 PM MDT Tue May 14 2019

...A STRONG THUNDERSTORM WILL CONTINUE TO AFFECT EAST CENTRAL DAWES
COUNTY...

At 331 PM MDT, a strong thunderstorm was located near Chadron
Campground, or 10 miles southwest of Chadron, moving east at 15 mph.

Winds in excess of 40 mph and half inch hail are possible with this
storm.

Locations impacted include...
Chadron, Red Cloud Campground, Chadron Campground and Chadron St
Park.

LAT...LON 4261 10321 4279 10324 4290 10280 4279 10279
      4278 10277 4264 10278
TIME...MOT...LOC 2131Z 262DEG 14KT 4272 10313

Braun

Special weather statement, May 14, 4:13 PM MDT, 1 hour 46 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
413 PM MDT Tue May 14 2019

WYZ102-142300-
Niobrara County-
413 PM MDT Tue May 14 2019

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

At 412 PM MDT, a strong thunderstorm was located 7 miles southwest of
Morrisey, or 31 miles southwest of Newcastle, moving southeast at 25
mph.

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

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

LAT...LON 4341 10406 4311 10405 4339 10461 4350 10452
      4351 10435
TIME...MOT...LOC 2212Z 300DEG 21KT 4344 10446

Braun

Special weather statement, May 14, 4:16 PM MDT, 1 hour 43 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
416 PM MDT Tue May 14 2019

NEZ021-142245-
Morrill-
416 PM MDT Tue May 14 2019

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

At 416 PM MDT, a strong thunderstorm was located 15 miles northeast
of The Intersection Of Highway 385 And 92, or 22 miles south of
Alliance, moving east at 20 mph.

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

This storm will remain over mainly rural areas of northeastern
Morrill County.

LAT...LON 4176 10297 4189 10286 4183 10268 4176 10267
      4174 10264 4164 10263 4156 10264
TIME...MOT...LOC 2216Z 288DEG 16KT 4178 10281

Braun

Special weather statement, May 14, 4:18 PM MDT, 1 hour 41 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
418 PM MDT Tue May 14 2019

NEZ002-142245-
Dawes NE-
418 PM MDT Tue May 14 2019

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN DAWES COUNTY UNTIL
445 PM MDT...

At 418 PM MDT, Doppler radar was tracking a strong thunderstorm 8
miles southeast of Red Cloud Campground, or 10 miles southwest of Hay
Springs, moving east at 20 mph.

Penny size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Chadron St Park.

LAT...LON 4256 10304 4269 10300 4270 10278 4260 10277
      4250 10277 4249 10278
TIME...MOT...LOC 2218Z 277DEG 18KT 4261 10287

Brothers

Local storm report, May 14, 5:40 PM MDT, 19 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
May 14, 4:13 PM MDT	Special Weather Statement	CYS	Niobrara	47 min
May 14, 4:30 PM MDT	Severe Thunderstorm Warning	CYS	Niobrara	45 min
May 14, 5:18 PM MDT	Severe Thunderstorm Warning	CYS	Niobrara	42 min
May 13, 6:16 PM MDT	Special Weather Statement	CYS	Scotts Bluff	29 min
May 14, 3:04 PM MDT	Special Weather Statement	CYS	Dawes	26 min
May 14, 3:32 PM MDT	Special Weather Statement	CYS	Dawes	28 min
May 14, 4:16 PM MDT	Special Weather Statement	CYS	Morrill	29 min
May 14, 4:18 PM MDT	Special Weather Statement	CYS	Dawes	27 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.