Alert archive / Wyoming / Special Weather Statements in 2021

Special Weather Statement, NWS Riverton, WY

May 26, 2021Washakie County, Wyoming

NWS Riverton, WY issued this special weather statement at May 26, 2021, 2:41 PM MDT for Washakie County, Wyoming. It was in force for 34 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 26, 2021, 2:41 PM MDT (20:41 UTC)
Expired: May 26, 2021, 3:15 PM MDT
In force: 34 min
Issued by: NWS Riverton, WY

County Washakie County, WY

The radar

The Riverton/Lander radar (KRIW), 103 km from the middle of the area, began a volume at 20:42 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

Riverton, WY (KRIW), launched 12:00Z, 8.7 hours before the alert went out and 101 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1309 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: 277 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 26, 11:38 AM MDT, 3 hours 3 minutes earlier.

Area forecast discussion, May 26, 11:38 AM MDT, 3 hours 3 minutes before

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Hazardous weather outlook, May 26, 2:40 AM MDT, 12 hours 1 minute before

Hazardous Weather Outlook
National Weather Service Riverton WY
240 AM MDT Wed May 26 2021

WYZ001>020-022>030-270845-
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-
240 AM MDT Wed May 26 2021

This Hazardous Weather Outlook is for Western and Central
Wyoming.

.DAY ONE...This Afternoon and Tonight.

Scattered thunderstorms possible across much of the
area. Some storms could be strong with hail and strong winds,
especially in northern and eastern areas.

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

Friday...Showers and isolated thunderstorms are possible through the
afternoon and evening across far northern Wyoming.

Sunday and Monday...Widespread showers and thunderstorms are
possible across central and western Wyoming.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions.

In the hours before

Special weather statement, May 26, 12:46 PM MDT, 1 hour 55 minutes before

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Special weather statement, May 26, 1:24 PM MDT, 1 hour 17 minutes before

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Special weather statement, May 26, 1:53 PM MDT, 48 minutes before

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Special weather statement, May 26, 2:30 PM MDT, 11 minutes before

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Special weather statement, May 26, 2:33 PM MDT, 8 minutes before

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Special weather statement, May 26, 2:41 PM MDT, 0 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
May 26, 9:54 AM MDT	Special Weather Statement	RIW	Fremont	36 min
May 26, 10:22 AM MDT	Special Weather Statement	RIW	Hot Springs	23 min
May 26, 11:03 AM MDT	Special Weather Statement	RIW	Fremont	27 min
May 26, 11:21 AM MDT	Special Weather Statement	RIW	Fremont	24 min
May 26, 11:46 AM MDT	Special Weather Statement	RIW	Fremont	29 min
May 26, 12:30 PM MDT	Special Weather Statement	RIW		30 min
May 26, 12:46 PM MDT	Special Weather Statement	RIW	Johnson	29 min
May 26, 1:24 PM MDT	Special Weather Statement	RIW		21 min
May 26, 1:53 PM MDT	Special Weather Statement	RIW	Johnson	37 min
May 26, 2:30 PM MDT	Special Weather Statement	RIW	Johnson	30 min
May 26, 2:33 PM MDT	Special Weather Statement	RIW	Natrona	27 min
May 26, 2:48 PM MDT	Special Weather Statement	RIW	Washakie	27 min
May 26, 2:54 PM MDT	Tornado Warning	RIW	Washakie	23 min
May 26, 3:18 PM MDT	Special Weather Statement	RIW	Washakie	27 min
May 26, 3:47 PM MDT	Special Weather Statement	RIW	Washakie	28 min
May 26, 4:11 PM MDT	Special Weather Statement	RIW	Johnson	34 min
May 26, 4:21 PM MDT	Special Weather Statement	RIW	Teton	24 min

Nearby

Special Weather Statements in Wyoming, 2021 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.