Alert archive / Wyoming / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 63, NWS Riverton, WY

August 8, 2013Natrona County, Wyoming

NWS Riverton, WY issued this severe thunderstorm warning at Aug 8, 2013, 4:43 PM MDT for Natrona County, Wyoming. It was in force for 62 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 8, 2013, 4:43 PM MDT (22:43 UTC)
Expired: Aug 8, 2013, 5:45 PM MDT
In force: 62 min
Issued by: NWS Riverton, WY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Natrona County, WY

The radar

The Riverton/Lander radar (KRIW), 137 km from the middle of the area, began a volume at 22:45 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 8, 2:38 PM MDT, 2 hours 5 minutes earlier.

Area forecast discussion, Aug 8, 2:38 PM MDT, 2 hours 5 minutes before

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Hazardous weather outlook, Aug 8, 5:00 AM MDT, 11 hours 43 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RIVERTON WY
500 AM MDT THU AUG 8 2013

WYZ001>020-022>030-091100-
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-
500 AM MDT THU AUG 8 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND CENTRAL WYOMING.

.DAY ONE...TODAY AND TONIGHT

ISOLATED TO SCATTERED STRONG THUNDERSTORMS WILL BE POSSIBLE
THIS AFTERNOON AND EVENING...MAINLY NORTHEAST OF A MAMMOTH TO
THERMOPOLIS TO CASPER LINE. THE MAIN THREAT FROM
ANY OF THESE STORMS WILL BE GUSTY WINDS TO 35 MPH...POSSIBLY SOME
PEA TO MARBLE SIZE HAIL.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

FRIDAY...FRIDAY WILL CONTINUE WITH PULSE TYPE THUNDERSTORMS WITH
HEAVY RAIN AND SMALL HAIL A POSSIBILITY ACROSS MAINLY THE NORTHERN
FORECAST AREA.

SATURDAY WILL OFFER ANOTHER DAY OF ISOLATED TO SCATTERED
THUNDERSTORMS ACROSS THE ENTIRE FORECAST AREA.

SUNDAY THROUGH WEDNESDAY...ISOLATED THUNDERSTORMS WILL BE POSSIBLE
ACROSS MAINLY THE NORTHERN REGION.

.SPOTTER INFORMATION STATEMENT...

PLEASE REPORT WINDS OVER 45 MPH AND HAIL OF ANY SIZE. THANK YOU.

TEAM RIVERTON

In the hours before

Special weather statement, Aug 8, 3:21 PM MDT, 1 hour 22 minutes before

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Special weather statement, Aug 8, 3:30 PM MDT, 1 hour 13 minutes before

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Special weather statement, Aug 8, 3:50 PM MDT, 53 minutes before

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Special weather statement, Aug 8, 3:59 PM MDT, 44 minutes before

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Special weather statement, Aug 8, 4:30 PM MDT, 13 minutes before

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Special weather statement, Aug 8, 4:40 PM MDT, 3 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 7:14 PM MDT	Special Weather Statement	RIW	Fremont	46 min
Aug 8, 12:44 PM MDT	Special Weather Statement	RIW	Johnson	46 min
Aug 8, 1:03 PM MDT	Special Weather Statement	RIW	Lincoln	42 min
Aug 8, 1:12 PM MDT	Special Weather Statement	RIW	Johnson	48 min
Aug 8, 1:14 PM MDT	Special Weather Statement	RIW	Johnson	46 min
Aug 8, 1:24 PM MDT	Special Weather Statement	RIW	Johnson	51 min
Aug 8, 1:28 PM MDT	Severe Thunderstorm Warning	RIW	Johnson	62 min
Aug 8, 2:22 PM MDT	Special Weather Statement	RIW	Hot Springs	38 min
Aug 8, 2:44 PM MDT	Special Weather Statement	RIW		46 min
Aug 8, 2:57 PM MDT	Special Weather Statement	RIW	Hot Springs	48 min
Aug 8, 3:21 PM MDT	Special Weather Statement	RIW	Natrona	39 min
Aug 8, 3:30 PM MDT	Special Weather Statement	RIW		45 min
Aug 8, 3:50 PM MDT	Special Weather Statement	RIW	Natrona	40 min
Aug 8, 3:59 PM MDT	Special Weather Statement	RIW	Washakie	46 min
Aug 8, 4:30 PM MDT	Special Weather Statement	RIW	Natrona	45 min
Aug 8, 4:40 PM MDT	Special Weather Statement	RIW	Hot Springs	50 min
Aug 8, 5:53 PM MDT	Special Weather Statement	RIW		52 min
Aug 8, 5:57 PM MDT	Special Weather Statement	RIW	Washakie	48 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 2013 Every severe thunderstorm warning in 2013

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.