Alert archive / Wyoming / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 201, NWS Rapid City, SD

July 21, 2000Campbell County, Crook County, Wyoming

NWS Rapid City, SD issued this severe thunderstorm warning at Jul 21, 2000, 4:09 PM MDT for Campbell County, Crook County, Wyoming. It was in force for 51 min. 2 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: Jul 21, 2000, 4:09 PM MDT (22:09 UTC)
Expired: Jul 21, 2000, 5:00 PM MDT
In force: 51 min
Issued by: NWS Rapid City, SD
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Campbell County, WY, Crook County, WY

What was reported inside it

Time	Report	Where	Remark
Jul 21, 4:24 PM MDT	Hail 0.75	Rozet, WY
Jul 21, 4:37 PM MDT	Hail 0.75	Moorcroft, 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

Rapid City, SD (KUNR), launched 12:00Z, 10.2 hours before the alert went out and 178 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: 131 J/kg
Mixed-layer CIN: -210 J/kg
Mixed-layer LCL: 1456 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 124 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 Rapid City, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 21, 3:00 PM MDT, 1 hour 9 minutes earlier.

Area forecast discussion, Jul 21, 3:00 PM MDT, 1 hour 9 minutes before

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In the hours before

Local storm report, Jul 21, 1:49 PM MDT, 2 hours 20 minutes before

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Local storm report, Jul 21, 4:05 PM MDT, 4 minutes before

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The office that day

Everything else NWS Rapid City, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 21, 11:37 AM MDT	Severe Thunderstorm Warning	UNR	Mellette	53 min
Jul 21, 12:25 PM MDT	Tornado Warning	UNR	Mellette	35 min
Jul 21, 12:26 PM MDT	Severe Thunderstorm Warning	UNR	Custer	19 min
Jul 21, 12:38 PM MDT	Severe Thunderstorm Warning	UNR	Bennett	52 min
Jul 21, 12:45 PM MDT	Severe Thunderstorm Warning	UNR	Custer	15 min
Jul 21, 12:51 PM MDT	Severe Thunderstorm Warning	UNR	Todd, Tripp	54 min
Jul 21, 1:00 PM MDT	Severe Thunderstorm Warning	UNR	Mellette	30 min
Jul 21, 1:29 PM MDT	Severe Thunderstorm Warning	UNR	Bennett	61 min
Jul 21, 1:42 PM MDT	Severe Thunderstorm Warning	UNR	Todd	63 min
Jul 21, 2:28 PM MDT	Severe Thunderstorm Warning	UNR	Bennett	62 min
Jul 21, 2:44 PM MDT	Severe Thunderstorm Warning	UNR	Todd	31 min
Jul 21, 3:20 PM MDT	Severe Thunderstorm Warning	UNR	Mellette	40 min
Jul 21, 3:25 PM MDT	Severe Thunderstorm Warning	UNR	Jackson	50 min
Jul 21, 3:57 PM MDT	Severe Thunderstorm Warning	UNR	Butte	48 min
Jul 21, 4:27 PM MDT	Severe Thunderstorm Warning	UNR	Meade	63 min
Jul 21, 5:00 PM MDT	Severe Thunderstorm Warning	UNR	Fall River	45 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 2000 Every severe thunderstorm warning in 2000

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.