513 
WUUS55 KRIW 122342
SVRRIW
WYC043-130015-
/O.NEW.KRIW.SV.W.0108.250912T2342Z-250913T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Riverton WY
542 PM MDT Fri Sep 12 2025

The National Weather Service in Riverton has issued a

* Severe Thunderstorm Warning for...
  Northeastern Washakie County in central Wyoming...

* Until 615 PM MDT.

* At 541 PM MDT, a severe thunderstorm was located near Big Trails,
  which is 14 miles southeast of Ten Sleep, moving north at 35 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* This severe thunderstorm will be near...
  Tensleep Canyon around 600 PM MDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4381 10716 4378 10734 4404 10754 4411 10715
TIME...MOT...LOC 2341Z 173DEG 28KT 4386 10729 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

Gerhardt

806 
WWUS55 KRIW 122350
SVSRIW

Severe Weather Statement
National Weather Service Riverton WY
550 PM MDT Fri Sep 12 2025

WYC043-130015-
/O.CON.KRIW.SV.W.0108.000000T0000Z-250913T0015Z/
Washakie-
550 PM MDT Fri Sep 12 2025

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM MDT
FOR NORTHEASTERN WASHAKIE COUNTY...

At 549 PM MDT, a severe thunderstorm was located 8 miles south of
Tensleep Canyon, which is 9 miles southeast of Ten Sleep, moving
north at 40 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

This severe storm will be near...
  Tensleep Canyon around 555 PM MDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4388 10720 4385 10733 4404 10754 4411 10715
TIME...MOT...LOC 2349Z 170DEG 36KT 4394 10731 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Gerhardt

075 
WWUS55 KRIW 122359
SVSRIW

Severe Weather Statement
National Weather Service Riverton WY
559 PM MDT Fri Sep 12 2025

WYC043-130015-
/O.CON.KRIW.SV.W.0108.000000T0000Z-250913T0015Z/
Washakie-
559 PM MDT Fri Sep 12 2025

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM MDT
FOR NORTHEASTERN WASHAKIE COUNTY...

At 559 PM MDT, a severe thunderstorm was located near Tensleep
Canyon, which is near Ten Sleep, moving north at 30 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

This severe storm will be near...
  Tensleep Canyon around 605 PM MDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4397 10718 4394 10738 4405 10750 4411 10715
TIME...MOT...LOC 2359Z 173DEG 28KT 4402 10732 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Gerhardt

343 
WWUS55 KRIW 130012
SVSRIW

Severe Weather Statement
National Weather Service Riverton WY
612 PM MDT Fri Sep 12 2025

WYC043-130022-
/O.EXP.KRIW.SV.W.0108.000000T0000Z-250913T0015Z/
Washakie-
612 PM MDT Fri Sep 12 2025

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WASHAKIE COUNTY
WILL EXPIRE AT 615 PM MDT...

The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

&&

LAT...LON 4397 10718 4394 10738 4405 10750 4411 10715
TIME...MOT...LOC 0012Z 173DEG 28KT 4412 10734 

$$

Gerhardt