Alert archive / Wyoming / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 30, NWS Riverton, WY

June 28, 2020Big Horn County, Hot Springs County, Washakie County, Wyoming

NWS Riverton, WY issued this severe thunderstorm warning at Jun 28, 2020, 7:32 PM MDT for Big Horn County, Hot Springs County, Washakie 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
Jun 28, 2020, 7:32 PM MDT (01:32 UTC)
Expired
Jun 28, 2020, 8:15 PM MDT
In force
43 min
Issued by
NWS Riverton, WY
Area
Storm-based polygon
Tornado
Possible
Hail
0.75 in
Wind
60.0 mph

Counties Big Horn County, WY, Hot Springs County, WY, Washakie County, WY

The radar

The Riverton/Lander radar (KRIW), 115 km from the middle of the area, began a volume at 01:35 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.

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 Jun 28, 5:21 PM MDT, 2 hours 11 minutes earlier.

Area forecast discussion, Jun 28, 5:21 PM MDT, 2 hours 11 minutes before
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Hazardous weather outlook, Jun 28, 4:09 AM MDT, 15 hours 23 minutes before
Hazardous Weather Outlook
National Weather Service Riverton WY
409 AM MDT Sun Jun 28 2020

WYZ001>020-022>030-291015-
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-
409 AM MDT Sun Jun 28 2020

This Hazardous Weather Outlook is for Western and Central
Wyoming.

.DAY ONE...Today and Tonight.

Widespread showers and thunderstorms expected for western and
central WY today and tonight. Some thunderstorms could be severe,
with very gusty winds. Areas around Johnson County may also see a
threat for hail this afternoon. Persistent rainfall across
northwestern WY may lead to some localized flooding.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Showers and thunderstorms will continue into the day Monday, with
some localized gusty winds with stronger thunderstorms.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report any significant weather
conditions.

In the hours before

Special weather statement, Jun 28, 5:43 PM MDT, 1 hour 49 minutes before
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Special weather statement, Jun 28, 6:04 PM MDT, 1 hour 28 minutes before
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Special weather statement, Jun 28, 6:23 PM MDT, 1 hour 9 minutes before
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      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Special weather statement, Jun 28, 6:24 PM MDT, 1 hour 8 minutes before
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      <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.
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Special weather statement, Jun 28, 6:34 PM MDT, 58 minutes before
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      <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.
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Special weather statement, Jun 28, 7:18 PM MDT, 14 minutes before
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      <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.
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 28, 6:04 PM MDTSpecial Weather StatementRIWNatrona26 min
Jun 28, 6:23 PM MDTSpecial Weather StatementRIW37 min
Jun 28, 6:24 PM MDTSpecial Weather StatementRIWHot Springs51 min
Jun 28, 6:34 PM MDTSpecial Weather StatementRIWJohnson26 min
Jun 28, 7:18 PM MDTSpecial Weather StatementRIWHot Springs27 min
Jun 28, 9:03 PM MDTSpecial Weather StatementRIWBig Horn27 min
Jun 29, 1:31 PM MDTAreal Flood AdvisoryRIWFremont30 hr
Jun 29, 2:17 PM MDTAreal Flood AdvisoryRIWBig Horn, Park57 hr
Jun 29, 5:39 PM MDTAreal Flood WarningRIWFremont26 hr

Nearby

Severe Thunderstorm Warnings in Wyoming, 2020Every severe thunderstorm warning in 2020

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.