Alert archive / South Dakota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 64, NWS Rapid City, SD

July 19, 2002Pennington County, South Dakota

NWS Rapid City, SD issued this severe thunderstorm warning at Jul 19, 2002, 10:12 PM MDT for Pennington County, South Dakota. It was in force for 48 min. 1 report 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 19, 2002, 10:12 PM MDT (04:12 UTC)
Expired: Jul 19, 2002, 11:00 PM MDT
In force: 48 min
Issued by: NWS Rapid City, SD
Area: Counties, with a storm outline in the text

County Pennington County, SD

What was reported inside it

Time	Report	Where	Remark
Jul 19, 10:37 PM MDT	Hail 0.75	Rapid City, SD

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

Bismarck Municip, ND (KBIS), launched 00:00Z, 4.2 hours before the alert went out and 349 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: 1846 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 1601 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 57 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 Rapid City, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 19, 8:00 PM MDT, 2 hours 12 minutes earlier.

Area forecast discussion, Jul 19, 8:00 PM MDT, 2 hours 12 minutes before

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In the hours before

Local storm report, Jul 19, 5:42 PM MDT, 4 hours 30 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 19, 9:23 PM MDT	Severe Thunderstorm Warning	UNR	Pennington	52 min
Jul 19, 10:46 PM MDT	Severe Thunderstorm Warning	UNR	Meade	44 min
Jul 20, 12:37 AM MDT	Severe Thunderstorm Warning	UNR	Perkins	53 min
Jul 20, 1:09 AM MDT	Severe Thunderstorm Warning	UNR	Ziebach	51 min
Jul 20, 2:58 PM MDT	Severe Thunderstorm Warning	UNR	Lawrence, Pennington	47 min
Jul 20, 4:12 PM MDT	Severe Thunderstorm Warning	UNR	Pennington	18 min
Jul 20, 4:17 PM MDT	Severe Thunderstorm Warning	UNR	Butte	58 min
Jul 20, 5:04 PM MDT	Severe Thunderstorm Warning	UNR	Meade	41 min
Jul 20, 5:38 PM MDT	Severe Thunderstorm Warning	UNR	Lawrence	37 min
Jul 19, 7:46 PM MDT	Severe Thunderstorm Warning	UNR	Campbell	59 min
Jul 19, 9:18 PM MDT	Severe Thunderstorm Warning	UNR	Crook	27 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 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.