Alert archive / Wyoming / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 177, NWS Rapid City, SD

August 26, 2002Campbell County, Wyoming

NWS Rapid City, SD issued this severe thunderstorm warning at Aug 26, 2002, 8:49 PM MDT for Campbell County, Wyoming. It was in force for 56 min. 3 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Aug 26, 2002, 8:49 PM MDT (02:49 UTC)
Expired: Aug 26, 2002, 9:45 PM MDT
In force: 56 min
Issued by: NWS Rapid City, SD
Area: Counties, with a storm outline in the text

County Campbell County, WY

What was reported inside it

Time	Report	Where
Aug 26, 8:52 PM MDT	Hail 0.75	Gillette, WY
Aug 26, 8:55 PM MDT	Hail 1.75	Gillette, WY
Aug 26, 9:20 PM MDT	Hail 0.75	Gillette, WY

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Riverton, WY (KRIW), launched 00:00Z, 2.8 hours before the alert went out and 264 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: 172 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 3663 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 165 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

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 Rapid City, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 26, 5:30 PM MDT, 3 hours 19 minutes earlier.

Area forecast discussion, Aug 26, 5:30 PM MDT, 3 hours 19 minutes before

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In the hours before

Local storm report, Aug 26, 3:23 PM MDT, 5 hours 26 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
323 PM MDT MON AUG 26 2002

TIME(MDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0245 PM    BOXELDER                  SD   1 INCH HAIL
08/26/02   PENNINGTON                     HAIL REPORTED AT I-90
                                          EXIT AT BOXELDER

Local storm report, Aug 26, 3:45 PM MDT, 5 hours 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
345 PM MDT MON AUG 26 2002

TIME(MDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0344 PM    3 SW CUSTER               SD   1 INCH HAIL
08/26/02   CUSTER                         HAIL REPORTED AT BEAVER
                                          LAKE CAMPGROUND

Local storm report, Aug 26, 4:24 PM MDT, 4 hours 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
424 PM MDT MON AUG 26 2002

TIME(MDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0344 PM    3 SW CUSTER               SD   1.75 INCH HAIL
08/26/02   CUSTER                         REPORTED BY LAW
                                          ENFORCEMENT OFFICIAL.

0351 PM    2 S MYSTIC                SD   .75 INCH HAIL
08/26/02   PENNINGTON                     REPORTED BY STORM
                                          SPOTTER.

0412 PM    PRINGLE                   SD   1.75 INCH HAIL
08/26/02   CUSTER                         REPORTED BY STORM
                                          SPOTTER.

Special weather statement, Aug 26, 5:19 PM MDT, 3 hours 30 minutes before

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Local storm report, Aug 26, 5:33 PM MDT, 3 hours 16 minutes before

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Nearby

Severe Thunderstorm Warnings in Wyoming, 2002 Every severe thunderstorm warning in 2002

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.