Alert archive / Wyoming / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 1, NWS Riverton, WY

May 17, 2022Big Horn County, Wyoming

NWS Riverton, WY issued this severe thunderstorm warning at May 17, 2022, 4:47 PM MDT for Big Horn County, Wyoming. It was in force for 43 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 17, 2022, 4:47 PM MDT (22:47 UTC)
Expired
May 17, 2022, 5:30 PM MDT
In force
43 min
Issued by
NWS Riverton, WY
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Big Horn County, WY

The radar

The Billings radar (KBLX), 155 km from the middle of the area, began a volume at 22:50 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, 10.8 hours before the alert went out and 410 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 2022-05-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2022-05-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -75 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1596 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
-75 m²/s²
0-3 km storm-relative helicity
131 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 Riverton, WY wrote its last area forecast discussion before this severe thunderstorm warning went out at May 17, 2:19 PM MDT, 2 hours 28 minutes earlier.

Area forecast discussion, May 17, 2:19 PM MDT, 2 hours 28 minutes before
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Hazardous weather outlook, May 17, 3:50 AM MDT, 12 hours 57 minutes before
Hazardous Weather Outlook
National Weather Service Riverton WY
350 AM MDT Tue May 17 2022

WYZ001>020-022>030-181100-
Yellowstone National Park-Absaroka Mountains-Cody Foothills-
North Big Horn Basin-Southwest Big Horn Basin-
Southeast Big Horn Basin-Owl Creek and Bridger Mountains-
Bighorn Mountains West-Bighorn Mountains Southeast-
Northeast Johnson County-Southeast Johnson County-
Teton and Gros Ventre Mountains-Jackson Hole-
Wind River Mountains West-Wind River Mountains East-
Upper Wind River Basin-Wind River Basin-Lander Foothills-
Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-Casper Mountain-Star Valley-
Salt River and Wyoming Ranges-Upper Green River Basin Foothills-
Upper Green River Basin-South Lincoln County-
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
350 AM MDT Tue May 17 2022

This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...Today and Tonight.

Isolated to scattered afternoon and evening thunderstorms. Strong
wind gusts are the main threat.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Wednesday...Elevated fire weather conditions for portions of the
area due to warm temperatures, windy conditions, and low
afternoon humidity.

Thursday...Strong wind is possible in the central and south.
Isolated thunderstorms in the north and central.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

In the hours before

Special weather statement, May 17, 1:38 PM MDT, 3 hours 9 minutes before
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Special weather statement, May 17, 1:41 PM MDT, 3 hours 6 minutes before
Special Weather Statement
National Weather Service Riverton WY
141 PM MDT Tue May 17 2022

WYZ017-172015-
Wind River Basin-
141 PM MDT Tue May 17 2022

...A strong thunderstorm will impact portions of northeastern Fremont
County through 215 PM MDT...

At 140 PM MDT, Doppler radar was tracking a strong thunderstorm near
Pavillion, moving east at 15 mph.

HAZARD...Winds in excess of 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could blow around unsecured objects. Minor
         damage to outdoor objects is possible.

This storm will remain over mainly rural areas of northeastern
Fremont County, including the following locations... Midvale.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
office in Riverton.

&&

LAT...LON 4323 10875 4341 10870 4338 10823 4312 10831
TIME...MOT...LOC 1940Z 282DEG 14KT 4331 10863

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

TL
Special weather statement, May 17, 2:11 PM MDT, 2 hours 36 minutes before
Special Weather Statement
National Weather Service Riverton WY
211 PM MDT Tue May 17 2022

WYZ017-172045-
Wind River Basin-
211 PM MDT Tue May 17 2022

...A strong thunderstorm will impact portions of central Fremont
County through 245 PM MDT...

At 210 PM MDT, Doppler radar was tracking a strong thunderstorm 7
miles northeast of Ocean Lake, or 8 miles east of Pavillion, moving
east at 15 mph.

HAZARD...Winds in excess of 30 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could blow around unsecured objects. Minor
         damage to outdoor objects is possible.

This storm will remain over mainly rural areas of central Fremont
County, including the following locations... Midvale.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
office in Riverton.

&&

LAT...LON 4321 10865 4338 10857 4334 10820 4308 10832
TIME...MOT...LOC 2010Z 288DEG 12KT 4328 10852

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...30 MPH

TL
Special weather statement, May 17, 2:30 PM MDT, 2 hours 17 minutes before
Special Weather Statement
National Weather Service Riverton WY
230 PM MDT Tue May 17 2022

WYZ017-172100-
Wind River Basin-
230 PM MDT Tue May 17 2022

...A strong thunderstorm will impact portions of east central Fremont
County through 300 PM MDT...

At 229 PM MDT, Doppler radar was tracking a strong thunderstorm 9
miles northwest of Hidden Valley, or 12 miles north of Riverton,
moving east at 15 mph.

HAZARD...Winds in excess of 40 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Small hail may cover the ground. Gusty winds could blow
         around unsecured objects. Minor damage to outdoor objects
         is possible.

Locations impacted include...
  Hidden Valley and Boysen State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
office in Riverton.

&&

LAT...LON 4316 10853 4333 10844 4326 10805 4301 10818
TIME...MOT...LOC 2029Z 291DEG 14KT 4322 10839

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

TL
Special weather statement, May 17, 2:44 PM MDT, 2 hours 3 minutes before
Special Weather Statement
National Weather Service Riverton WY
244 PM MDT Tue May 17 2022

WYZ020-172115-
Natrona County Lower Elevations-
244 PM MDT Tue May 17 2022

...A strong thunderstorm will impact portions of northeastern Natrona
County through 315 PM MDT...

At 244 PM MDT, Doppler radar was tracking a strong thunderstorm 7
miles northwest of Teapot Rock, or 31 miles north of Casper, moving
east at 15 mph.

HAZARD...Winds in excess of 40 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could blow around unsecured objects. Minor
         damage to outdoor objects is possible.

Locations impacted include...
  Teapot Rock.

This includes Interstate 25 between mile markers 207 and 224.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
office in Riverton.

&&

LAT...LON 4322 10659 4339 10651 4333 10610 4307 10623
TIME...MOT...LOC 2044Z 289DEG 15KT 4328 10645

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

TL
Special weather statement, May 17, 4:36 PM MDT, 11 minutes before
Special Weather Statement
National Weather Service Riverton WY
436 PM MDT Tue May 17 2022

WYZ004-172300-
North Big Horn Basin-
436 PM MDT Tue May 17 2022

...A strong thunderstorm will impact portions of southwestern Big
Horn County through 500 PM MDT...

At 435 PM MDT, Doppler radar was tracking a strong thunderstorm just
west southwest of Otto, or 15 miles west of Basin, moving east at 25
mph.

HAZARD...Winds in excess of 40 mph and half inch hail. The hail
         could cover the ground and possibly roadways.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

This strong thunderstorm will be near...
  Otto around 445 PM MDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4424 10852 4441 10855 4448 10812 4423 10806
TIME...MOT...LOC 2235Z 259DEG 23KT 4433 10835

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

21

The office that day

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

IssuedProductOfficeCountiesLasted
May 16, 6:42 PM MDTSpecial Weather StatementRIW33 min
May 16, 6:49 PM MDTSpecial Weather StatementRIWNatrona26 min
May 16, 7:22 PM MDTSpecial Weather StatementRIWLincoln23 min
May 16, 7:45 PM MDTSpecial Weather StatementRIWLincoln30 min
May 16, 7:46 PM MDTSpecial Weather StatementRIWLincoln29 min
May 16, 8:29 PM MDTSpecial Weather StatementRIWSublette31 min
May 16, 8:55 PM MDTSpecial Weather StatementRIWSublette35 min
May 16, 9:16 PM MDTSpecial Weather StatementRIWSublette29 min
May 16, 10:10 PM MDTSpecial Weather StatementRIWFremont20 min
May 17, 12:13 PM MDTSpecial Weather StatementRIWHot Springs32 min
May 17, 12:55 PM MDTSpecial Weather StatementRIWHot Springs35 min
May 17, 12:55 PM MDTSpecial Weather StatementRIWHot Springs35 min
May 17, 1:23 PM MDTSpecial Weather StatementRIWHot Springs37 min
May 17, 1:38 PM MDTSpecial Weather StatementRIWHot Springs22 min
May 17, 1:41 PM MDTSpecial Weather StatementRIWFremont34 min
May 17, 2:11 PM MDTSpecial Weather StatementRIWFremont34 min
May 17, 2:30 PM MDTSpecial Weather StatementRIWFremont30 min
May 17, 2:44 PM MDTSpecial Weather StatementRIWNatrona31 min
May 17, 4:36 PM MDTSpecial Weather StatementRIWBig Horn24 min
May 17, 5:12 PM MDTSpecial Weather StatementRIWNatrona33 min
May 17, 5:28 PM MDTSevere Thunderstorm WarningRIWBig Horn47 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 2022Every severe thunderstorm warning in 2022

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.