Alert archive / Wyoming / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 21, NWS Riverton, WY

August 6, 2022Natrona County, Wyoming

NWS Riverton, WY issued this severe thunderstorm warning at Aug 6, 2022, 3:02 PM MDT for Natrona County, Wyoming. It was in force for 43 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: Aug 6, 2022, 3:02 PM MDT (21:02 UTC)
Expired: Aug 6, 2022, 3:45 PM MDT
In force: 43 min
Issued by: NWS Riverton, WY
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

County Natrona County, WY

The radar

The Riverton/Lander radar (KRIW), 157 km from the middle of the area, began a volume at 21:06 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, 9.0 hours before the alert went out and 151 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: 1 J/kg
Mixed-layer CIN: -221 J/kg
Mixed-layer LCL: 803 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 115 m²/s²
0-3 km storm-relative helicity: 184 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

978 
WUUS55 KRIW 062102
SVRRIW
WYC025-062145-
/O.NEW.KRIW.SV.W.0021.220806T2102Z-220806T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Riverton WY
302 PM MDT Sat Aug 6 2022

The National Weather Service in Riverton has issued a

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

* Until 345 PM MDT.

* At 302 PM MDT, a severe thunderstorm was located 9 miles northeast
  of Goldeneye Reservoir, or 24 miles northwest of Casper, moving
  east 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.

* Locations impacted include...
  Antelope Hills and Teapot Rock.

This includes Interstate 25 between mile markers 200 and 217.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4303 10674 4318 10676 4329 10625 4301 10622
TIME...MOT...LOC 2102Z 260DEG 27KT 4312 10660 

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

$$

Hattings

3 follow-up statements

342 
WWUS55 KRIW 062116
SVSRIW

Severe Weather Statement
National Weather Service Riverton WY
316 PM MDT Sat Aug 6 2022

WYC025-062145-
/O.CON.KRIW.SV.W.0021.000000T0000Z-220806T2145Z/
Natrona-
316 PM MDT Sat Aug 6 2022

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM MDT
FOR NORTHEASTERN NATRONA COUNTY...

At 316 PM MDT, a severe thunderstorm was located 8 miles northwest of
Antelope Hills, or 21 miles north of Casper, moving east 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.

Locations impacted include...
Antelope Hills and Teapot Rock. 

This includes Interstate 25 between mile markers 200 and 217.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4303 10666 4320 10667 4329 10625 4301 10622
TIME...MOT...LOC 2116Z 260DEG 27KT 4314 10646 

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

$$

Hattings

015 
WWUS55 KRIW 062130
SVSRIW

Severe Weather Statement
National Weather Service Riverton WY
330 PM MDT Sat Aug 6 2022

WYC025-062145-
/O.CON.KRIW.SV.W.0021.000000T0000Z-220806T2145Z/
Natrona-
330 PM MDT Sat Aug 6 2022

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM MDT
FOR EAST CENTRAL NATRONA COUNTY...

At 330 PM MDT, a severe thunderstorm was located near Teapot Rock, or
22 miles north of Casper, moving east at 30 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Teapot Rock.

This includes Interstate 25 between mile markers 206 and 216.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4311 10644 4323 10646 4328 10625 4326 10625
      4308 10623
TIME...MOT...LOC 2130Z 260DEG 27KT 4316 10631 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Hattings

477 
WWUS55 KRIW 062139
SVSRIW

Severe Weather Statement
National Weather Service Riverton WY
339 PM MDT Sat Aug 6 2022

WYC025-062149-
/O.EXP.KRIW.SV.W.0021.000000T0000Z-220806T2145Z/
Natrona-
339 PM MDT Sat Aug 6 2022

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL NATRONA COUNTY
WILL EXPIRE AT 345 PM MDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

LAT...LON 4311 10644 4323 10646 4328 10625 4326 10625
      4308 10623
TIME...MOT...LOC 2139Z 260DEG 27KT 4316 10628 

$$

Hattings

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 2:07 AM MDT	Special Weather Statement	RIW		23 min
Aug 6, 1:14 PM MDT	Special Weather Statement	RIW		46 min
Aug 6, 1:52 PM MDT	Special Weather Statement	RIW	Natrona	38 min
Aug 6, 2:19 PM MDT	Severe Thunderstorm Warning	RIW	Natrona	41 min
Aug 6, 3:38 PM MDT	Severe Thunderstorm Warning	RIW	Natrona	21 min
Aug 6, 4:11 PM MDT	Special Weather Statement	RIW	Natrona	49 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 2022 Every severe thunderstorm warning in 2022

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.