Alert archive / Wyoming / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 12, NWS Riverton, WY

June 22, 1998Hot Springs County, Wyoming

NWS Riverton, WY issued this severe thunderstorm warning at Jun 22, 1998, 1:50 PM MDT for Hot Springs County, Wyoming. It was in force for 35 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 22, 1998, 1:50 PM MDT (19:50 UTC)
Expired: Jun 22, 1998, 2:25 PM MDT
In force: 35 min
Issued by: NWS Riverton, WY
Area: Whole counties

County Hot Springs County, WY

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 12:00Z, 7.8 hours before the alert went out and 433 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: 63 J/kg
Mixed-layer CIN: -333 J/kg
Mixed-layer LCL: 2053 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 111 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 22, 1:50 PM MDT, 0 minutes earlier.

Area forecast discussion, Jun 22, 1:50 PM MDT, 0 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RIVERTON WY
150 PM MDT MON JUN 22 1998

UPR TROF RMNS OVER THE WRN U.S. THIS AFTN WITH SHT/WVS EMBD IN SW FLOW
E OF TROF. ONE WK WV OVER NW WY ATTM WITH ANOTHER OVER CNTRL ID. WILL
GO WITH THE CONCENSUS OF THE ETA/AVN ON THE TUES AFTN POS OF A SHT/WV
ARRIVING FM THE SW WHICH LEAVES CWFA BETWEEN WVS TUE AFTN. SW JET MOVG
INTO THE SW U.S. RMNS SOUTH OF CWA THRU TUES...BUT UPR DIVERGENCE
STILL PROGGED OVER CWFA TODAY WITH LESS ON TUES. TOR WATCH WILL BE
ISSUED FOR XTRM ERN CWA...HAVE SVR STMS DLVPG...HAVE TO GO. RWM

In the hours before

Special weather statement, Jun 22, 10:20 AM MDT, 3 hours 30 minutes before

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Special weather statement, Jun 22, 10:20 AM MDT, 3 hours 30 minutes before

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Special weather statement, Jun 22, 10:20 AM MDT, 3 hours 30 minutes before

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Special weather statement, Jun 22, 1:35 PM MDT, 15 minutes before

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Special weather statement, Jun 22, 1:35 PM MDT, 15 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 22, 4:42 PM MDT	Severe Thunderstorm Warning	RIW	Fremont	23 min
Jun 22, 5:09 PM MDT	Severe Thunderstorm Warning	RIW	Johnson	26 min
Jun 22, 5:23 PM MDT	Tornado Warning	RIW	Johnson	12 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 1998 Every severe thunderstorm warning in 1998

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.