Alert archive / South Dakota / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 85, NWS Rapid City, SD

June 30, 2001Butte County, Lawrence County, South Dakota

NWS Rapid City, SD issued this severe thunderstorm warning at Jun 30, 2001, 2:27 AM MDT for Butte County, Lawrence County, South Dakota. It was in force for 58 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 30, 2001, 2:27 AM MDT (08:27 UTC)
Expired: Jun 30, 2001, 3:25 AM MDT
In force: 58 min
Issued by: NWS Rapid City, SD
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Butte County, SD, Lawrence County, SD

The radar

The Rapid City radar (KUDX), 86 km from the middle of the area, began a volume at 08:29 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Rapid City, SD (KUNR), launched 00:00Z, 8.5 hours before the alert went out and 88 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: 917 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 2203 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: -7 m²/s²
0-3 km storm-relative helicity: 109 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

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 Jun 29, 8:12 PM MDT, 6 hours 15 minutes earlier.

Area forecast discussion, Jun 29, 8:12 PM MDT, 6 hours 15 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 30, 3:30 PM MDT	Severe Thunderstorm Warning	UNR	Pennington	60 min
Jun 30, 4:29 PM MDT	Severe Thunderstorm Warning	UNR	Custer, Pennington	61 min
Jun 30, 5:28 PM MDT	Severe Thunderstorm Warning	UNR	Custer	62 min
Jun 30, 12:57 AM MDT	Severe Thunderstorm Warning	UNR	Crook	63 min
Jun 30, 1:58 AM MDT	Severe Thunderstorm Warning	UNR	Crook	62 min
Jun 30, 2:11 AM MDT	Severe Thunderstorm Warning	UNR	Campbell	64 min
Jun 30, 2:45 AM MDT	Severe Thunderstorm Warning	UNR	Crook	60 min
Jun 30, 3:36 AM MDT	Severe Thunderstorm Warning	UNR	Campbell	54 min
Jun 30, 3:40 AM MDT	Flash Flood Warning	UNR	Crook	5 hr
Jun 30, 3:46 AM MDT	Severe Thunderstorm Warning	UNR	Crook	44 min
Jun 30, 5:04 AM MDT	Severe Thunderstorm Warning	UNR	Crook	41 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2001 Every severe thunderstorm warning in 2001

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; radar from the NEXRAD Level II archive.