Alert archive / Wyoming / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 44, NWS Riverton, WY

August 21, 2006Johnson County, Natrona County, Wyoming

NWS Riverton, WY issued this severe thunderstorm warning at Aug 21, 2006, 2:29 PM MDT for Johnson County, Natrona County, Wyoming. It was in force for 44 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
Aug 21, 2006, 2:29 PM MDT (20:29 UTC)
Expired
Aug 21, 2006, 3:13 PM MDT
In force
44 min
Issued by
NWS Riverton, WY
Area
Counties, with a storm outline in the text

Counties Johnson County, WY, Natrona County, WY

The radar

The Riverton/Lander radar (KRIW), 152 km from the middle of the area, began a volume at 20:32 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 Aug 21, 2:06 PM MDT, 23 minutes earlier.

Area forecast discussion, Aug 21, 2:06 PM MDT, 23 minutes before
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Hazardous weather outlook, Aug 21, 1:58 PM MDT, 31 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RIVERTON WY
158 PM MDT MON AUG 21 2006

WYZ001>020-022>030-221300-
ABSAROKA MOUNTAINS-BIGHORN MOUNTAINS SOUTHEAST-
BIGHORN MOUNTAINS WEST-CASPER MOUNTAIN-CODY FOOTHILLS-
EAST SWEETWATER COUNTY-FLAMING GORGE-
GREEN MOUNTAINS AND RATTLESNAKE RANGE-JACKSON HOLE-LANDER FOOTHILLS-
NATRONA COUNTY LOWER ELEVATIONS-NORTH BIG HORN BASIN-
NORTHEAST JOHNSON COUNTY-OWL CREEK AND BRIDGER MOUNTAINS-
ROCK SPRINGS AND GREEN RIVER-SALT RIVER AND WYOMING RANGES-
SOUTH LINCOLN COUNTY-SOUTHEAST BIG HORN BASIN-
SOUTHEAST JOHNSON COUNTY-SOUTHWEST BIG HORN BASIN-STAR VALLEY-
TETON AND GROS VENTRE MOUNTAINS-UPPER GREEN RIVER BASIN-
UPPER GREEN RIVER BASIN FOOTHILLS-UPPER WIND RIVER BASIN-
WIND RIVER BASIN-WIND RIVER MOUNTAINS EAST-WIND RIVER MOUNTAINS WEST-
YELLOWSTONE NATIONAL PARK-
158 PM MDT MON AUG 21 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND CENTRAL WYOMING.

.DAY ONE...THIS AFTERNOON AND TONIGHT

ISOLATED SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE OVER MUCH OF
WESTERN AND CENTRAL WYOMING THROUGH THIS EVENING.  THE STRONGEST
STORMS WILL OCCUR IN JOHNSON AND NATRONA COUNTIES.  ATMOSPHERIC
INSTABILITY AND AVAILABLE MOISTURE ARE THE GREATEST IN THIS AREA
ALONG WITH FAVORABLE LOWER AND MID LEVEL WINDS. SOME SEVERE
THUNDERSTORMS WILL BE POSSIBLE SOUTH AND EAST OF THE BIGHORN
MOUNTAINS. THE MAIN THREAT WITH OTHER STORMS ACROSS THE REGION WILL
BE WIND GUSTS TO 40 MPH ALONG WITH DANGEROUS CLOUD TO GROUND
LIGHTNING.  NEW FIRES WILL BE POSSIBLE AS FUEL CONDITIONS REMAIN RIPE
FOR FIRE STARTS FROM LIGHTNING STRIKES.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY
THE CHANCE OF THUNDERSTORMS CONTINUES TUESDAY AND WEDNESDAY
ACROSS THE NORTHERN PART OF THE STATE...ALONG WITH ISOLATED
THUNDERSTORM ACTIVITY ACROSS THE EXTREME SOUTHERN PORTIONS OF
OUR AREA. THESE THUNDERSTORMS WILL BE CAPABLE OF PRODUCING DANGEROUS
CLOUD TO GROUND LIGHTNING AND GUSTY WINDS. ISOLATED THUNDERSTORM
ACTIVITY WILL REMAIN POSSIBLE ACROSS THE AREA THURSDAY AND FRIDAY...
PRODUCING SIMILAR THREATS.

SPOTTER INFORMATION STATEMENT...

SPOTTERS IN JOHNSON AND NATRONA COUNTIES ARE ASKED TO PLEASE RELAY
ANY REPORTS OF LARGE HAIL OR SEVERE WIND GUSTS TO THE NATIONAL
WEATHER SERVICE.  SPOTTERS ACROSS THE REMAINDER OF WESTERN AND
CENTRAL WYOMING ARE ASKED TO REPORT WIND GUSTS IN EXCESS OF 40 MPH
TODAY.  THANK YOU.

TRIW

In the hours before

Local storm report, Aug 21, 2:15 PM MDT, 14 minutes before
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<body>
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    <section class="card" role="status" aria-live="polite">
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      <h1 id="headline">This service is currently unavailable.</h1>
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 21, 1:48 PM MDTSevere Thunderstorm WarningRIWJohnson, Natrona42 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 2006Every severe thunderstorm warning in 2006

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.