Alert archive / Wyoming / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 122, NWS Cheyenne, WY

June 26, 2019Goshen County, Wyoming; Scotts Bluff County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 26, 2019, 5:42 PM MDT for Goshen County, Wyoming; Scotts Bluff 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
Jun 26, 2019, 5:42 PM MDT (23:42 UTC)
Expired
Jun 26, 2019, 6:15 PM MDT
In force
33 min
Issued by
NWS Cheyenne, WY
Area
Storm-based polygon
Hail
1.25 in
Wind
60.0 mph

Counties Scotts Bluff County, NE, Goshen County, WY

The radar

The Cheyenne radar (KCYS), 111 km from the middle of the area, began a volume at 23:42 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.

IssuedProductOfficeLasted
Jun 26, 4:37 PM MDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 11.7 hours before the alert went out and 252 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, Rapid City, SD at 12:00Z on 2019-06-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 44 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, Rapid City, SD at 12:00Z on 2019-06-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 26 square meters per square second.193958Sfc1 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
44 J/kg
Mixed-layer CIN
-616 J/kg
Mixed-layer LCL
1129 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
26 m²/s²
0-3 km storm-relative helicity
67 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 Jun 26, 5:35 PM MDT, 7 minutes earlier.

Area forecast discussion, Jun 26, 5:35 PM MDT, 7 minutes before
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Hazardous weather outlook, Jun 26, 4:59 PM MDT, 43 minutes before
Hazardous Weather Outlook
National Weather Service Cheyenne WY
459 PM MDT Wed Jun 26 2019

WYZ101-103>107-109>118-272300-
Converse County Lower Elevations-North Laramie Range-
Ferris/Seminoe/Shirley Mountains-Shirley Basin-
Central Laramie Range and Southwest Platte County-
East Platte 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-
459 PM MDT Wed Jun 26 2019

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

.DAY ONE...TONIGHT

Isolated thunderstorms may develop late this afternoon and early
evening. Severe weather is not expected.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

Warm temperatures and snow melt will continue with increased
river flows over the next few days, however the probability for
widespread hazardous weather is low.

.Spotter information statement...

Spotter activation will not be required.

NEZ002-003-019>021-054-055-095-096-WYZ102-108-119-272300-
Dawes-Box Butte-Scotts Bluff-Banner-Morrill-Kimball-Cheyenne-
North Sioux-South Sioux-Niobrara County-Goshen County-
East Laramie County-
459 PM MDT Wed Jun 26 2019

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

.DAY ONE...TONIGHT

Scattered strong to severe thunderstorms will develop late this
afternoon and continue through late evening east of Interstate
25. Strong instability and wind shear will favor supercells
capable of very large hail, damaging winds and possibly a tornado
or two across the western Nebraska Panhandle and far eastern
Wyoming. A Severe Thunderstorm Watch is in effect until 11 PM MDT.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

The probability for widespread hazardous weather is low.

.Spotter information statement...

Spotter activation may be required through this evening east of a
line from Lusk to Pine Bluffs.

In the hours before

Special weather statement, Jun 26, 4:16 PM MDT, 1 hour 26 minutes before
Special Weather Statement
National Weather Service Cheyenne WY
416 PM MDT Wed Jun 26 2019

NEZ019-020-096-WYZ108-262300-
Scotts Bluff NE-South Sioux NE-Banner NE-Goshen County WY-
416 PM MDT Wed Jun 26 2019

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN SCOTTS BLUFF...
NORTHWESTERN BANNER...SOUTHWESTERN SIOUX AND SOUTHERN GOSHEN COUNTIES
UNTIL 500 PM MDT...

At 416 PM MDT, Doppler radar was tracking a strong thunderstorm near
Hawk Springs, or 16 miles south of Torrington, moving northeast at 30
mph.

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

Locations impacted include...
Torrington, Mitchell, Morrill, La Grange, Lyman, Yoder, Huntley,
Stegall, Hawk Springs, Hawk Springs Campground, Hubbard Hill, Hawk
Springs Recreation Area, Veteran and Henry.

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.

&&

LAT...LON 4159 10415 4168 10437 4180 10458 4220 10419
      4194 10363
TIME...MOT...LOC 2216Z 231DEG 25KT 4183 10419

Lyons
Special weather statement, Jun 26, 4:18 PM MDT, 1 hour 24 minutes before
Special Weather Statement
National Weather Service Cheyenne WY
418 PM MDT Wed Jun 26 2019

NEZ054-WYZ119-262300-
Kimball NE-East Laramie County WY-
418 PM MDT Wed Jun 26 2019

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL KIMBALL AND
SOUTHEASTERN LARAMIE COUNTIES UNTIL 500 PM MDT...

At 418 PM MDT, Doppler radar was tracking a strong thunderstorm near
Carpenter, or 28 miles east of Cheyenne, moving northeast at 15 mph.

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

Locations impacted include...
Pine Bluffs and Carpenter.

This includes the following highways...
 Interstate 80 in Wyoming between mile markers 389 and 402.
 Interstate 80 in Nebraska between mile markers 1 and 8.

LAT...LON 4104 10440 4135 10417 4120 10388 4100 10413
      4100 10434
TIME...MOT...LOC 2218Z 216DEG 15KT 4105 10426

Lyons
Special weather statement, Jun 26, 4:54 PM MDT, 48 minutes before
Special Weather Statement
National Weather Service Cheyenne WY
454 PM MDT Wed Jun 26 2019

NEZ020-054-WYZ108-119-262345-
Kimball NE-Banner NE-Goshen County WY-East Laramie County WY-
454 PM MDT Wed Jun 26 2019

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN KIMBALL...
SOUTHWESTERN BANNER...SOUTHEASTERN GOSHEN AND EAST CENTRAL LARAMIE
COUNTIES UNTIL 545 PM MDT...

At 453 PM MDT, Doppler radar was tracking a strong thunderstorm 8
miles northwest of Pine Bluffs, or 27 miles west of Kimball, moving
north at 20 mph.

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

Locations impacted include...
Albin.

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 1100 PM MDT for
the Panhandle of Nebraska...and southeastern Wyoming.

LAT...LON 4115 10412 4122 10434 4161 10419 4151 10386
TIME...MOT...LOC 2253Z 202DEG 19KT 4126 10419

Lyons
Special weather statement, Jun 26, 5:03 PM MDT, 39 minutes before
Special Weather Statement
National Weather Service Cheyenne WY
503 PM MDT Wed Jun 26 2019

NEZ019-096-262345-
Scotts Bluff NE-South Sioux NE-
503 PM MDT Wed Jun 26 2019

...SIGNIFICANT WEATHER ADVISORY FOR SCOTTS BLUFF AND SOUTH CENTRAL
SIOUX COUNTIES UNTIL 545 PM MDT...

At 502 PM MDT, Doppler radar was tracking a strong thunderstorm over
Stegall, or 15 miles southeast of Torrington, moving east at 25 mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Scottsbluff, Gering, Mitchell, Terrytown, Morrill, Minatare, Lyman,
Lake Minatare Campground, Stegall, Scotts Bluff National Monument,
Hubbard Hill, Scottsbluff Airport, Lake Minatare, Lake Alice, Melbeta
and Henry.

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 1100 PM MDT for
the Panhandle of Nebraska.

LAT...LON 4171 10405 4200 10405 4215 10353 4179 10337
TIME...MOT...LOC 2302Z 251DEG 24KT 4190 10398

Lyons
Local storm report, Jun 26, 5:29 PM MDT, 13 minutes before
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Special weather statement, Jun 26, 5:40 PM MDT, 2 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 25, 6:04 PM MDTSpecial Weather StatementCYSConverse41 min
Jun 25, 6:29 PM MDTSpecial Weather StatementCYSNiobrara46 min
Jun 25, 6:35 PM MDTSevere Thunderstorm WarningCYSConverse, Niobrara28 min
Jun 25, 6:37 PM MDTSpecial Weather StatementCYSConverse38 min
Jun 25, 6:40 PM MDTSpecial Weather StatementCYSGoshen35 min
Jun 25, 9:02 PM MDTSpecial Weather StatementCYSCarbon43 min
Jun 26, 3:37 PM MDTSpecial Weather StatementCYSGoshen38 min
Jun 26, 3:58 PM MDTSpecial Weather StatementCYSPlatte47 min
Jun 26, 4:16 PM MDTSpecial Weather StatementCYSGoshen44 min
Jun 26, 4:28 PM MDTSevere Thunderstorm WarningCYSGoshen33 min
Jun 26, 5:46 PM MDTSpecial Weather StatementCYSNiobrara44 min
Jun 26, 5:58 PM MDTSevere Thunderstorm WarningCYSConverse, Niobrara34 min
Jun 25, 6:01 PM MDTSpecial Weather StatementCYSKimball29 min
Jun 25, 6:43 PM MDTSpecial Weather StatementCYSDawes32 min
Jun 25, 7:16 PM MDTSpecial Weather StatementCYSSioux44 min
Jun 25, 7:20 PM MDTSpecial Weather StatementCYSDawes40 min
Jun 25, 8:53 PM MDTSpecial Weather StatementCYSBox Butte37 min
Jun 26, 4:18 PM MDTSpecial Weather StatementCYSKimball42 min
Jun 26, 4:54 PM MDTSpecial Weather StatementCYSBanner51 min
Jun 26, 5:03 PM MDTSpecial Weather StatementCYSScotts Bluff42 min
Jun 26, 5:17 PM MDTSevere Thunderstorm WarningCYSScotts Bluff, Sioux28 min
Jun 26, 5:40 PM MDTSpecial Weather StatementCYSSioux35 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 2019Severe Thunderstorm Warnings in Nebraska, 2019Every 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.