Alert archive / South Dakota / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 79, NWS Rapid City, SD

June 20, 2003Custer County, Pennington County, South Dakota

NWS Rapid City, SD issued this severe thunderstorm warning at Jun 20, 2003, 6:28 PM MDT for Custer County, Pennington County, South Dakota. It was in force for 47 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 20, 2003, 6:28 PM MDT (00:28 UTC)
Expired: Jun 20, 2003, 7:15 PM MDT
In force: 47 min
Issued by: NWS Rapid City, SD
Area: Counties, with a storm outline in the text

Counties Custer County, SD, Pennington County, SD

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 20, 2:25 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Rapid City, SD (KUNR), launched 00:00Z, 0.5 hours before the alert went out and 33 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: 812 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 1538 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 155 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 Jun 20, 3:00 PM MDT, 3 hours 28 minutes earlier.

Area forecast discussion, Jun 20, 3:00 PM MDT, 3 hours 28 minutes before

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Hazardous weather outlook, Jun 20, 6:51 AM MDT, 11 hours 37 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
Jun 20, 6:41 PM MDT	Severe Thunderstorm Warning	UNR		49 min
Jun 20, 6:55 PM MDT	Severe Thunderstorm Warning	UNR	Meade	65 min
Jun 21, 1:49 PM MDT	Severe Thunderstorm Warning	UNR	Meade	56 min
Jun 21, 2:21 PM MDT	Severe Thunderstorm Warning	UNR	Butte	39 min
Jun 21, 2:34 PM MDT	Severe Thunderstorm Warning	UNR	Meade, Perkins	56 min
Jun 21, 3:22 PM MDT	Severe Thunderstorm Warning	UNR	Ziebach	53 min
Jun 21, 3:26 PM MDT	Severe Thunderstorm Warning	UNR	Meade	64 min
Jun 21, 4:08 PM MDT	Severe Thunderstorm Warning	UNR	Ziebach	67 min
Jun 21, 4:14 PM MDT	Severe Thunderstorm Warning	UNR	Butte, Lawrence	61 min
Jun 21, 5:05 PM MDT	Severe Thunderstorm Warning	UNR	Butte, Meade	55 min
Jun 21, 1:19 PM MDT	Severe Thunderstorm Warning	UNR	Campbell	56 min
Jun 21, 1:45 PM MDT	Tornado Warning	UNR	Campbell	30 min
Jun 21, 2:12 PM MDT	Severe Thunderstorm Warning	UNR	Campbell	63 min
Jun 21, 2:18 PM MDT	Tornado Warning	UNR	Campbell	57 min
Jun 21, 2:50 PM MDT	Tornado Warning	UNR	Crook	55 min
Jun 21, 3:40 PM MDT	Severe Thunderstorm Warning	UNR	Crook	65 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2003 Every severe thunderstorm warning in 2003

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.