Alert archive / Wyoming / Special Weather Statements in 2021

Special Weather Statement, NWS Riverton, WY

May 16, 2021Sweetwater County, Wyoming

NWS Riverton, WY issued this special weather statement at May 16, 2021, 2:39 PM MDT for Sweetwater County, Wyoming. It was in force for 36 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
May 16, 2021, 2:39 PM MDT (20:39 UTC)
Expired
May 16, 2021, 3:15 PM MDT
In force
36 min
Issued by
NWS Riverton, WY

County Sweetwater County, WY

The radar

The Riverton/Lander radar (KRIW), 189 km from the middle of the area, began a volume at 20:39 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 text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at May 16, 2:13 PM MDT, 26 minutes earlier.

Area forecast discussion, May 16, 2:13 PM MDT, 26 minutes before
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Hazardous weather outlook, May 16, 3:52 AM MDT, 10 hours 47 minutes before
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In the hours before

Special weather statement, May 16, 1:49 PM MDT, 50 minutes before
Special Weather Statement
National Weather Service Riverton WY
149 PM MDT Sun May 16 2021

WYZ028-029-162015-
Flaming Gorge-Rock Springs and Green River-
149 PM MDT Sun May 16 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN SWEETWATER COUNTY
UNTIL 215 PM MDT...

At 147 PM MDT, Doppler radar was tracking a strong thunderstorm 16
miles southeast of Green River, moving northwest at 25 mph.

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

This storm will remain over mainly rural areas of southwestern
Sweetwater County, including the following locations...Extreme
northeast Flaming Gorge National Recreation Area.

This thunderstorm could impact the Green River area between 215 and
230 PM.

This includes Interstate 80 between mile markers 82 and 102.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4121 10931 4157 10963 4170 10932 4146 10919
      4144 10924 4140 10923 4127 10917
TIME...MOT...LOC 1947Z 151DEG 20KT 4133 10926

21
Special weather statement, May 16, 2:11 PM MDT, 28 minutes before
Special Weather Statement
National Weather Service Riverton WY
211 PM MDT Sun May 16 2021

WYZ028-029-162045-
Flaming Gorge-Rock Springs and Green River-
211 PM MDT Sun May 16 2021

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL SWEETWATER COUNTY UNTIL
245 PM MDT...

At 210 PM MDT, Doppler radar was tracking a strong thunderstorm 12
miles southeast of Green River, moving north at 15 mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

This storm will move northward along highway 191 south of Green
River and Rock Springs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

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 4152 10938 4156 10917 4149 10917 4146 10918
      4144 10924 4140 10923 4133 10920 4132 10939
TIME...MOT...LOC 2010Z 176DEG 12KT 4141 10929

21
Special weather statement, May 16, 2:18 PM MDT, 21 minutes before
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Special weather statement, May 16, 2:39 PM MDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
May 15, 6:26 PM MDTSpecial Weather StatementRIW34 min
May 15, 6:30 PM MDTSpecial Weather StatementRIW30 min
May 15, 6:59 PM MDTSpecial Weather StatementRIW31 min
May 16, 1:49 PM MDTSpecial Weather StatementRIWSweetwater26 min
May 16, 2:11 PM MDTSpecial Weather StatementRIWSweetwater34 min
May 16, 2:18 PM MDTSpecial Weather StatementRIWSweetwater27 min
May 16, 2:41 PM MDTSpecial Weather StatementRIWSweetwater34 min
May 16, 2:55 PM MDTAreal Flood AdvisoryRIWSweetwater3 hr
May 16, 3:14 PM MDTSpecial Weather StatementRIWSweetwater31 min
May 16, 3:44 PM MDTSpecial Weather StatementRIWSweetwater31 min
May 16, 4:15 PM MDTSpecial Weather StatementRIW30 min
May 16, 5:24 PM MDTAreal Flood AdvisoryRIWSweetwater3 hr
May 16, 5:39 PM MDTSpecial Weather StatementRIW36 min

Nearby

Special Weather Statements in Wyoming, 2021Every special weather statement in 2021

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.