Alert archive / South Dakota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 210, NWS Aberdeen, SD

August 29, 1997Clark County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Aug 29, 1997, 7:31 PM CDT for Clark County, South Dakota. It was in force for 64 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: Aug 29, 1997, 7:31 PM CDT (00:31 UTC)
Expired: Aug 29, 1997, 8:35 PM CDT
In force: 64 min
Issued by: NWS Aberdeen, SD
Area: Whole counties

County Clark County, SD

The radar

The Aberdeen radar (KABR), 85 km from the middle of the area, began a volume at 00:31 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

Aberdeen, SD (KABR), launched 00:00Z, 0.5 hours before the alert went out and 53 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: 259 J/kg
Mixed-layer CIN: -129 J/kg
Mixed-layer LCL: 929 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: -109 m²/s²
0-3 km storm-relative helicity: -107 m²/s²
Significant tornado parameter: -0.1
Supercell composite: -2.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KABR 300031 RRA
SVRABR
SDC025-300135-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ABERDEEN SD
731 PM CDT FRI AUG 29 1997

* SEVERE THUNDERSTORM WARNING FOR
  CLARK COUNTY - NORTHEASTERN SOUTH DAKOTA

* UNTIL 835 PM CDT
 
* SOME LOCATIONS AFFECTED
  CROCKER                             AROUND 730 PM CDT
  BRADLEY                             AROUND 745 PM CDT
  CLARK                               AROUND 750 PM CDT
  GARDEN CITY                         AROUND 800 PM CDT
  NAPLES                              AROUND 820 PM CDT

* AT 728 PM CDT...ABERDEEN DOPPLER RADAR INDICATED A SEVERE
  THUNDERSTORM WITH DAMAGING WINDS 38 MILES WEST OF WATERTOWN OR 6
  MILES SOU8THWEST OF CROCKER  MOVING SOUTHEAST AT 30 MPH.

THIS IS A DANGEROUS STORM! STAY INDOORS AWAY FROM WINDOWS.

HG/TK

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 Aberdeen, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 29, 10:50 AM CDT, 8 hours 41 minutes earlier.

Area forecast discussion, Aug 29, 10:50 AM CDT, 8 hours 41 minutes before

AREA FORECAST DISCUSSION FOR CENTRAL/NORTH CENTRAL/NORTHEAST SD
AND FOR TRAVERSE/BIG STONE COUNTIES OF MN
NATIONAL WEATHER SERVICE ABERDEEN SD
1050 AM CDT FRI AUG 29 1997

88D AND SAT LOOP SHOW SCT TSTMS POPPING OVER WRN SD AS FRONT AND
SHORT WAVE MOVE SLOWLY EAST. HAVE UPDATED TO INCREASE POPS OVER CENTRAL
SD AND INTRODUCE SLIGHT CHC OF TSTMS AS FAR EAST AS ABR AND REDFIELD.
ALSO REMOVED POPS IN WC MN ZONES AND LOWER HIGHS A BIT AS LOW CLDS ARE
SLOW TO DISSIPATE.

.ABR...NONE.

MGM

In the hours before

Local storm report, Aug 29, 6:57 PM CDT, 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  ABERDEEN SD
657 PM CDT FRI AUG 29 1997

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

0645 PM    GROTON                    SD   60 MPH WIND GUST
08/29/97   BROWN

END

Local storm report, Aug 29, 7:20 PM CDT, 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  ABERDEEN SD
720 PM CDT FRI AUG 29 1997

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

0720 PM    1 S PIERPONT              SD   1.00 INCH HAIL
08/29/97   DAY

END

Local storm report, Aug 29, 7:21 PM CDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  ABERDEEN SD
720 PM CDT FRI AUG 29 1997

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

0720 PM    1 S PIERPONT              SD   1.00 INCH HAIL
08/29/97   DAY

END

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 29, 7:44 PM CDT	Severe Thunderstorm Warning	ABR	Campbell	66 min
Aug 29, 7:50 PM CDT	Severe Thunderstorm Warning	ABR	Codington, Day	65 min
Aug 29, 8:06 PM CDT	Severe Thunderstorm Warning	ABR	Grant, Roberts	64 min
Aug 29, 8:27 PM CDT	Severe Thunderstorm Warning	ABR	Corson, Dewey, Walworth	63 min
Aug 29, 9:38 PM CDT	Severe Thunderstorm Warning	ABR	Brown, Edmunds	62 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 1997 Every severe thunderstorm warning in 1997

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.