Alert archive / Nebraska / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 249, NWS Cheyenne, WY

July 16, 2019Morrill County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 16, 2019, 5:28 PM MDT for Morrill County, Nebraska. It was in force for 32 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 16, 2019, 5:28 PM MDT (23:28 UTC)
Expired: Jul 16, 2019, 6:00 PM MDT
In force: 32 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Morrill County, NE

The radar

The Cheyenne radar (KCYS), 162 km from the middle of the area, began a volume at 23:31 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

Rapid City, SD (KUNR), launched 12:00Z, 11.5 hours before the alert went out and 262 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: 20 J/kg
Mixed-layer CIN: -411 J/kg
Mixed-layer LCL: 1520 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 100 m²/s²
0-3 km storm-relative helicity: 106 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 16, 5:26 PM MDT, 2 minutes earlier.

Area forecast discussion, Jul 16, 5:26 PM MDT, 2 minutes before

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Hazardous weather outlook, Jul 16, 3:05 PM MDT, 2 hours 23 minutes before

Hazardous Weather Outlook
National Weather Service Cheyenne WY
305 PM MDT Tue Jul 16 2019

NEZ020-021-054-055-WYZ103>105-109>119-172115-
Banner-Morrill-Kimball-Cheyenne-North Laramie Range-
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-
South Laramie Range-South Laramie Range Foothills-
Central Laramie County-East Laramie County-
305 PM MDT Tue Jul 16 2019

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

Strong to severe storms are possible through 9 PM tonight. Severe
threat is low, but it cannot be ruled out. The main concerns are
small hail and gusty winds.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

Afternoon thunderstorm chances continue over the next couple of
days then a drier and warmer pattern takes over towards the
weekend.

.Spotter information statement...

Spotter activation is needed today.

NEZ002-003-019-095-096-WYZ101-102-106>108-172115-
Dawes-Box Butte-Scotts Bluff-North Sioux-South Sioux-
Converse County Lower Elevations-Niobrara County-
Central Laramie Range and Southwest Platte County-
East Platte County-Goshen County-
305 PM MDT Tue Jul 16 2019

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

A Severe Thunderstorm Watch is in effect until 12 AM tonight. Hail
up to tennis ball size and wind gusts to 70 MPH will be possible.
A tornado or two cannot be ruled out, but confidence is low.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

Afternoon thunderstorm chances will continue through the next
couple of days and then a drier and warmer pattern takes over
towards the weekend.

.Spotter information statement...

Spotter activation is needed today.

Worley

In the hours before

Special weather statement, Jul 16, 4:19 PM MDT, 1 hour 9 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
419 PM MDT Tue Jul 16 2019

NEZ095-WYZ102-162300-
North Sioux NE-Niobrara County WY-
419 PM MDT Tue Jul 16 2019

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN SIOUX AND CENTRAL
NIOBRARA COUNTIES UNTIL 500 PM MDT...

At 419 PM MDT, Doppler radar was tracking a strong thunderstorm over
Lance Creek, or 19 miles northwest of Lusk, moving northeast at 30
mph.

Penny size hail and wind gusts up to 50 mph will be possible with
this storm.

Locations impacted include...
Redbird and Lance Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

This storm 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.

&&

A Severe Thunderstorm Watch remains in effect until midnight MDT for
the Panhandle of Nebraska...and east central Wyoming.

LAT...LON 4307 10405 4301 10405 4300 10404 4291 10471
      4304 10479 4337 10426
TIME...MOT...LOC 2219Z 234DEG 27KT 4301 10464

Lyons

Special weather statement, Jul 16, 4:41 PM MDT, 47 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
441 PM MDT Tue Jul 16 2019

WYZ102-162315-
Niobrara County WY-
441 PM MDT Tue Jul 16 2019

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN NIOBRARA AND
NORTHEASTERN CONVERSE COUNTIES UNTIL 515 PM MDT...

At 441 PM MDT, Doppler radar was tracking a strong thunderstorm 16
miles north of Lance Creek, or 36 miles north of Lusk, moving
northeast at 30 mph.

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

Locations impacted include...
Mule Creek Junction.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

A Severe Thunderstorm Watch remains in effect until midnight MDT for
east central Wyoming.

LAT...LON 4336 10417 4310 10469 4322 10490 4324 10490
      4350 10460 4351 10441
TIME...MOT...LOC 2241Z 232DEG 24KT 4325 10469

Brothers

Special weather statement, Jul 16, 4:59 PM MDT, 29 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
459 PM MDT Tue Jul 16 2019

WYZ101-162330-
Converse County Lower Elevations WY-
459 PM MDT Tue Jul 16 2019

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL CONVERSE COUNTY
UNTIL 530 PM MDT...

At 458 PM MDT, Doppler radar was tracking a strong thunderstorm 19
miles west of Bill, or 29 miles northwest of Douglas, moving
northeast at 30 mph.

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

This storm will remain over mainly rural areas of north central
Converse County.

A Severe Thunderstorm Watch remains in effect until midnight MDT for
east central Wyoming.

LAT...LON 4304 10570 4317 10577 4334 10537 4313 10524
TIME...MOT...LOC 2258Z 246DEG 27KT 4314 10563

Brothers

Special weather statement, Jul 16, 5:02 PM MDT, 26 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
502 PM MDT Tue Jul 16 2019

WYZ102-162330-
Niobrara County WY-
502 PM MDT Tue Jul 16 2019

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN NIOBRARA COUNTY
UNTIL 530 PM MDT...

At 502 PM MDT, Doppler radar was tracking a strong thunderstorm near
Manville, or 11 miles west of Lusk, moving northeast at 15 mph.

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

Locations impacted include...
Lusk, Manville and Keeline.

A Severe Thunderstorm Watch remains in effect until midnight MDT for
east central Wyoming.

LAT...LON 4270 10474 4283 10483 4304 10446 4276 10422
TIME...MOT...LOC 2302Z 241DEG 11KT 4281 10468

Brothers

Local storm report, Jul 16, 5:08 PM MDT, 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
508 PM MDT TUE JUL 16 2019

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

0502 PM     HAIL             2 W MCGREW              41.75N 103.46W
07/16/2019  M1.00 INCH       SCOTTS BLUFF       NE   STORM CHASER

            STATE HIGHWAY 92.

&&

MJAMSKI

Special weather statement, Jul 16, 5:21 PM MDT, 7 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
521 PM MDT Tue Jul 16 2019

NEZ095-WYZ102-162345-
North Sioux NE-Niobrara County WY-
521 PM MDT Tue Jul 16 2019

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN SIOUX AND EAST
CENTRAL NIOBRARA COUNTIES UNTIL 545 PM MDT...

At 520 PM MDT, Doppler radar was tracking a strong thunderstorm 16
miles south of Redbird, or 23 miles northeast of Lusk, moving
northeast at 15 mph.

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

This storm will remain over mainly rural areas of northwestern Sioux
and east central Niobrara Counties.

A Severe Thunderstorm Watch remains in effect until midnight MDT for
the Panhandle of Nebraska...and east central Wyoming.

LAT...LON 4320 10411 4315 10405 4300 10405 4300 10392
      4289 10413 4302 10428
TIME...MOT...LOC 2320Z 223DEG 14KT 4301 10415

Brothers

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, 7:12 PM MDT	Severe Thunderstorm Warning	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, 5:56 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.