Alert archive / Wyoming / Tornado Warnings in 2021

Tornado Warning 1, NWS Riverton, WY

May 26, 2021Washakie County, Wyoming

NWS Riverton, WY issued this tornado warning at May 26, 2021, 2:54 PM MDT for Washakie County, Wyoming. It was in force for 23 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, 2:54 PM MDT (20:54 UTC)
Expired: May 26, 2021, 3:17 PM MDT
In force: 23 min
Issued by: NWS Riverton, WY
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Washakie County, WY

The radar

The Riverton/Lander radar (KRIW), 102 km from the middle of the area, began a volume at 20:57 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, 8.9 hours before the alert went out and 99 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.

228 
WFUS55 KRIW 262054
TORRIW
WYC043-262130-
/O.NEW.KRIW.TO.W.0001.210526T2054Z-210526T2130Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Riverton WY
254 PM MDT Wed May 26 2021

The National Weather Service in Riverton has issued a

* Tornado Warning for...
  Central Washakie County in central Wyoming...

* Until 330 PM MDT.

* At 254 PM MDT, a severe thunderstorm capable of producing a tornado
  was located near Worland Municipal Airport, or 9 miles south of
  Worland, moving east at 20 mph.

  HAZARD...Tornado and quarter size hail.

  SOURCE...Weather spotters reported funnel cloud.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This tornadic thunderstorm will remain over mainly rural areas of
  central Washakie County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4384 10797 4391 10798 4397 10776 4383 10771
TIME...MOT...LOC 2054Z 262DEG 16KT 4388 10794 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

McDonald

2 follow-up statements

748 
WWUS55 KRIW 262105
SVSRIW

Severe Weather Statement
National Weather Service Riverton WY
305 PM MDT Wed May 26 2021

WYC043-262130-
/O.CON.KRIW.TO.W.0001.000000T0000Z-210526T2130Z/
Washakie-
305 PM MDT Wed May 26 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 330 PM MDT FOR CENTRAL
WASHAKIE COUNTY...
        
At 304 PM MDT, a severe thunderstorm capable of producing a tornado
was located 7 miles southeast of Worland Municipal Airport, or 10
miles southeast of Worland, moving east at 25 mph.

HAZARD...Tornado and quarter size hail.

SOURCE...Weather spotters reported a funnel cloud.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This tornadic thunderstorm will remain over mainly rural areas of
central Washakie County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

Brief heavy rainfall is occurring with this storm, and may lead to 
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4385 10788 4393 10791 4397 10776 4383 10771
TIME...MOT...LOC 2104Z 271DEG 23KT 4388 10785 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

McDonald

067 
WWUS55 KRIW 262117
SVSRIW

Severe Weather Statement
National Weather Service Riverton WY
317 PM MDT Wed May 26 2021

WYC043-262126-
/O.CAN.KRIW.TO.W.0001.000000T0000Z-210526T2130Z/
Washakie-
317 PM MDT Wed May 26 2021

...THE TORNADO WARNING FOR CENTRAL WASHAKIE COUNTY IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled.  However hail and gusty 
winds are still possible with this thunderstorm.

LAT...LON 4385 10788 4393 10791 4397 10776 4383 10771
TIME...MOT...LOC 2115Z 262DEG 16KT 4388 10783 

$$

VandenBoogart

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, 2:41 PM MDT	Special Weather Statement	RIW	Washakie	34 min
May 26, 2:48 PM MDT	Special Weather Statement	RIW	Washakie	27 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

Tornado Warnings in Wyoming, 2021 Every tornado warning in 2021 Tornadoes 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.