Alert archive / Wyoming / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 24, NWS Riverton, WY

June 4, 2014Hot Springs County, Washakie County, Wyoming

NWS Riverton, WY issued this severe thunderstorm warning at Jun 4, 2014, 5:12 PM MDT for Hot Springs County, 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 counties it named.

The facts

Issued: Jun 4, 2014, 5:12 PM MDT (23:12 UTC)
Expired: Jun 4, 2014, 5:35 PM MDT
In force: 23 min
Issued by: NWS Riverton, WY
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Hot Springs County, WY, Washakie County, WY

The radar

The Riverton/Lander radar (KRIW), 89 km from the middle of the area, began a volume at 23:12 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, 11.2 hours before the alert went out and 87 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: 4 J/kg
Mixed-layer CIN: -194 J/kg
Mixed-layer LCL: 2025 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 93 m²/s²
0-3 km storm-relative helicity: 84 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Jun 4, 3:30 PM MDT, 1 hour 42 minutes earlier.

Area forecast discussion, Jun 4, 3:30 PM MDT, 1 hour 42 minutes before

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Hazardous weather outlook, Jun 4, 3:47 PM MDT, 1 hour 25 minutes before

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In the hours before

Special weather statement, Jun 4, 3:01 PM MDT, 2 hours 11 minutes before

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Special weather statement, Jun 4, 3:20 PM MDT, 1 hour 52 minutes before

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Special weather statement, Jun 4, 3:30 PM MDT, 1 hour 42 minutes before

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Special weather statement, Jun 4, 3:49 PM MDT, 1 hour 23 minutes before

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Local storm report, Jun 4, 3:54 PM MDT, 1 hour 18 minutes before

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Special weather statement, Jun 4, 4:32 PM MDT, 40 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
Jun 3, 8:43 PM MDT	Special Weather Statement	RIW	Washakie	47 min
Jun 4, 10:02 AM MDT	Special Weather Statement	RIW	Park	58 min
Jun 4, 11:30 AM MDT	Special Weather Statement	RIW	Big Horn	60 min
Jun 4, 12:12 PM MDT	Special Weather Statement	RIW	Johnson	48 min
Jun 4, 12:32 PM MDT	Special Weather Statement	RIW	Natrona	43 min
Jun 4, 1:12 PM MDT	Special Weather Statement	RIW	Natrona	63 min
Jun 4, 1:31 PM MDT	Special Weather Statement	RIW	Big Horn	44 min
Jun 4, 1:51 PM MDT	Special Weather Statement	RIW		24 min
Jun 4, 1:56 PM MDT	Special Weather Statement	RIW	Johnson	19 min
Jun 4, 2:05 PM MDT	Special Weather Statement	RIW	Johnson	40 min
Jun 4, 2:17 PM MDT	Special Weather Statement	RIW	Big Horn	43 min
Jun 4, 2:20 PM MDT	Severe Thunderstorm Warning	RIW	Fremont	40 min
Jun 4, 2:27 PM MDT	Special Weather Statement	RIW	Johnson	63 min
Jun 4, 2:36 PM MDT	Severe Thunderstorm Warning	RIW	Johnson	54 min
Jun 4, 2:50 PM MDT	Special Weather Statement	RIW	Teton	55 min
Jun 4, 3:01 PM MDT	Special Weather Statement	RIW	Big Horn	44 min
Jun 4, 3:20 PM MDT	Special Weather Statement	RIW	Big Horn	40 min
Jun 4, 3:28 PM MDT	Severe Thunderstorm Warning	RIW	Johnson	33 min
Jun 4, 3:30 PM MDT	Special Weather Statement	RIW		45 min
Jun 4, 3:49 PM MDT	Special Weather Statement	RIW	Teton	41 min
Jun 4, 4:32 PM MDT	Special Weather Statement	RIW	Hot Springs	43 min
Jun 4, 4:45 PM MDT	Tornado Warning	RIW	Hot Springs	30 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 2014 Every severe thunderstorm warning in 2014

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.