Alert archive / Wyoming / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 1, NWS Riverton, WY

May 10, 2023Fremont County, Wyoming

NWS Riverton, WY issued this severe thunderstorm warning at May 10, 2023, 3:01 PM MDT for Fremont County, Wyoming. It was in force for 29 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 10, 2023, 3:01 PM MDT (21:01 UTC)
Expired
May 10, 2023, 3:30 PM MDT
In force
29 min
Issued by
NWS Riverton, WY
Area
Storm-based polygon
Tornado
Possible
Hail
1.0 in
Wind
60.0 mph

County Fremont County, WY

The radar

The Riverton/Lander radar (KRIW), 13 km from the middle of the area, began a volume at 21:04 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

Grand Junction, CO (KGJT), launched 12:00Z, 9.0 hours before the alert went out and 435 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-pSkew-T log-p diagram, Grand Junction, CO at 12:00Z on 2023-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Grand Junction, CO at 12:00Z on 2023-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 101 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
3468 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
101 m²/s²
0-3 km storm-relative helicity
112 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
May 10, 1:47 PM MDTSpecial Weather StatementRIW28 min
May 10, 2:17 PM MDTSpecial Weather StatementRIW28 min
May 10, 2:24 PM MDTSpecial Weather StatementRIWFremont36 min
May 10, 2:38 PM MDTSpecial Weather StatementRIWFremont22 min
May 10, 2:47 PM MDTSpecial Weather StatementRIW28 min
May 10, 3:17 PM MDTSpecial Weather StatementRIW58 min
May 10, 3:20 PM MDTSpecial Weather StatementRIW25 min
May 10, 3:26 PM MDTSpecial Weather StatementRIWFremont34 min
May 10, 3:37 PM MDTSpecial Weather StatementRIWNatrona23 min
May 10, 4:34 PM MDTSpecial Weather StatementRIWNatrona26 min
May 10, 4:41 PM MDTSpecial Weather StatementRIWWashakie49 min
May 10, 5:28 PM MDTSpecial Weather StatementRIWJohnson47 min
May 10, 5:48 PM MDTSpecial Weather StatementRIWNatrona42 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 2023Every severe thunderstorm warning in 2023

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.