Alert archive / Wyoming / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 120, NWS Cheyenne, WY

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

NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 26, 2019, 4:28 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, 4:28 PM MDT (22:28 UTC)
Expired
Jun 26, 2019, 5:01 PM MDT
In force
33 min
Issued by
NWS Cheyenne, WY
Area
Storm-based polygon
Hail
1.0 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 22:31 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, 10.5 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, 3:00 PM MDT, 1 hour 28 minutes earlier.

Area forecast discussion, Jun 26, 3:00 PM MDT, 1 hour 28 minutes before
<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>
Hazardous weather outlook, Jun 26, 3:15 PM MDT, 1 hour 13 minutes before
<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

In the hours before

Special weather statement, Jun 26, 3:37 PM MDT, 51 minutes before
Special Weather Statement
National Weather Service Cheyenne WY
337 PM MDT Wed Jun 26 2019

NEZ019-WYZ108-262215-
Scotts Bluff NE-Goshen County WY-
337 PM MDT Wed Jun 26 2019

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL SCOTTS BLUFF AND
SOUTHERN GOSHEN COUNTIES UNTIL 415 PM MDT...

At 336 PM MDT, Doppler radar was tracking a strong thunderstorm 7
miles southwest of Hawk Springs, or 25 miles southwest of Torrington,
moving northeast at 15 mph.

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

Locations impacted include...
Yoder, Huntley, Veteran and Hawk Springs.

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 4163 10437 4166 10454 4173 10458 4187 10459
      4210 10437 4186 10400
TIME...MOT...LOC 2136Z 217DEG 15KT 4173 10438

Lyons
Special weather statement, Jun 26, 3:58 PM MDT, 30 minutes before
Special Weather Statement
National Weather Service Cheyenne WY
358 PM MDT Wed Jun 26 2019

WYZ106>108-262245-
East Platte County WY-
Central Laramie Range and Southwest Platte County WY-
Goshen County WY-
358 PM MDT Wed Jun 26 2019

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL GOSHEN AND SOUTHERN
PLATTE COUNTIES UNTIL 445 PM MDT...

At 357 PM MDT, Doppler radar was tracking a strong thunderstorm near
Slater, or 11 miles south of Wheatland, moving northeast at 20 mph.

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

Locations impacted include...
Wheatland, Chugcreek, Lakeview North, Bordeaux, Westview Circle, Y-O
Ranch, Grayrocks Reservoir and Slater.

This includes Interstate 25 in Wyoming between mile markers 58 and
90.

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 4177 10468 4181 10502 4190 10515 4229 10497
      4210 10436
TIME...MOT...LOC 2157Z 208DEG 18KT 4189 10487

Lyons
Special weather statement, Jun 26, 4:16 PM MDT, 12 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, 10 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

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, 5:42 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.