Alert archive / South Dakota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 124, NWS Rapid City, SD

August 9, 2002Tripp County, South Dakota

NWS Rapid City, SD issued this severe thunderstorm warning at Aug 9, 2002, 5:09 PM CDT for Tripp County, South Dakota. It was in force for 36 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: Aug 9, 2002, 5:09 PM CDT (22:09 UTC)
Expired: Aug 9, 2002, 5:45 PM CDT
In force: 36 min
Issued by: NWS Rapid City, SD
Area: Counties, with a storm outline in the text

County Tripp County, SD

The radar

The North Platte radar (KLNX), 164 km from the middle of the area, began a volume at 22:12 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.

What was reported inside it

Time	Report	Where	Remark
Aug 9, 5:45 PM CDT	Hail 0.88	Millboro, 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

Aberdeen, SD (KABR), launched 12:00Z, 10.2 hours before the alert went out and 209 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: 20 J/kg
Mixed-layer CIN: -386 J/kg
Mixed-layer LCL: 1144 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 50 m²/s²
0-3 km storm-relative helicity: -1 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 Aug 9, 4:00 PM CDT, 1 hour 9 minutes earlier.

Area forecast discussion, Aug 9, 4:00 PM CDT, 1 hour 9 minutes before

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In the hours before

Local storm report, Aug 9, 2:45 PM CDT, 2 hours 24 minutes before

PRELIMINARY LOCAL STORM REPORT NATIONAL WEATHER SERVICE RAPID CITY SD
145 PM MDT FRI AUG 09 2002

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

0222 PM    13E OLSONVILLE            SD   60 MPH TSTM GUST
08/08/02   TODD                           REPORTED BY PUBLIC.

0230 PM    13WNW UPTON               SD   WIND DAMAGE. 5TH WHEEL
08/08/02   WESTON                         CAMPER TRAILER BLOWN
                                          OVER.

0300 PM    13S SUNDANCE              SD   65 MPH TSTM GUST
08/08/02   CROOK                          REPORTED BY PUBLIC.

WFO UNR STAFF

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 8, 7:41 PM CDT	Severe Thunderstorm Warning	UNR	Todd	34 min
Aug 8, 8:42 PM CDT	Severe Thunderstorm Warning	UNR	Mellette	48 min
Aug 8, 9:28 PM CDT	Severe Thunderstorm Warning	UNR	Mellette	32 min
Aug 8, 10:22 PM CDT	Severe Thunderstorm Warning	UNR	Tripp	53 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; radar from the NEXRAD Level II archive.