Alert archive / South Dakota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 8, NWS Sioux Falls, SD

June 19, 1997Brule County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 19, 1997, 11:13 PM CDT for Brule County, South Dakota. It was in force for 32 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 19, 1997, 11:13 PM CDT (04:13 UTC)
Expired
Jun 19, 1997, 11:45 PM CDT
In force
32 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County Brule County, SD

The radar

The Sioux Falls radar (KFSD), 190 km from the middle of the area, began a volume at 04:12 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.

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 4.2 hours before the alert went out and 142 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-pSkew-T log-p diagram, Aberdeen, SD at 00:00Z on 1997-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 941 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Aberdeen, SD at 00:00Z on 1997-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
941 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
1569 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
3 m²/s²
0-3 km storm-relative helicity
140 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.7

Open this sounding in Storm Lab

The text

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

665 
WUUS1 KFSD 200413 RRA
SVRFSD
SDC015-200445-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1113 PM CDT THU JUN 19 1997

* SEVERE THUNDERSTORM WARNING FOR
  NORTHERN BRULE COUNTY - IN SOUTHCENTRAL SOUTH DAKOTA

* UNTIL 1145 PM CDT
 
* THE STORM IS EXPECTED TO REMAIN IN RURAL AREAS.

* AT 1109 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A SEVERE THUNDERSTORM 19 MILES WEST OF CHAMBERLAIN  MOVING EAST AT
  30 MPH.
 
WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND BY WINDOWS.  DO NOT USE TELEPHONES OR
ELECTRICAL APPLIANCES UNTIL THE STORM HAS PASSED UNLESS IN AN
EMERGENCY.  MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.

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 Sioux Falls, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 19, 8:29 PM CDT, 2 hours 44 minutes earlier.

Area forecast discussion, Jun 19, 8:29 PM CDT, 2 hours 44 minutes before
SOUTH DAKOTA/NORTHWEST IOWA/SOUTHWEST MINNESOTA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SIOUX FALLS SD
830 PM CDT WED JUN 18 1997

SEVERE THUNDERSTORM POTENTIAL HAS NOT DEVELOPED AS WELL AS EARLIER
EXPECTED AND SOME ADJUSTMENT TO EARLIER CWA ZONES WILL BE MADE.  WILL
ADJUST ZONES IN LINE WITH SPC CHANGES TO WATCH AREA WHICH IS ANTICIPATED
AROUND 9 PM.  WILL LOWER THE POPS FOR LATER TONIGHT FOLLOWING THE
THUNDERSTORMS MOVING ALONG THE SOUTHEAST BORDER. POTENTIAL FOR SEVERE
THUNDERSTORMS YET THROUGH MIDNIGHT FROM AROUND YANKTON ON EAST INTO
NORTHWEST IOWA AS THE THUNDERSTORMS MOVE INTO THAT AREA.

.FSD...NONE
UMLAND

In the hours before

Local storm report, Jun 19, 10:55 PM CDT, 18 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  SIOUX FALLS SD
1055 PM CDT THU JUN 19 1997

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

0910 PM    CLAYTON                   SD   1.25 INCH HAIL
06/19/97   HUTCHINSON                     4 MILES SOUTH OF CLAYTON

UMLAND
Special weather statement, Jun 19, 11:04 PM CDT, 9 minutes before
NEZ013-014-SDZ060>062-065>071-200510-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1104 PM CDT THU JUN 19 1997

THE SEVERE THUNDERSTORM WATCH NUMBER 482 WHICH WAS IN EFFECT FOR
EXTREME SOUTHEAST SOUTH DAKOTA AND DAKOTA AND DIXON COUNTIES OF
EXTREME NORTHEAST NEBRASKA HAS BEEN CANCELED.  THUNDERSTORMS HAVE
MOVED OUT OF THE AREA.

ADDITIONAL THUNDERSTORMS MAY DEVELOP LATER TONIGHT.

UMLAND

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 19, 9:06 PM CDTSevere Thunderstorm WarningFSDHutchinson, Turner34 min
Jun 19, 9:39 PM CDTSevere Thunderstorm WarningFSDMcCook, Minnehaha, Turner31 min
Jun 19, 9:39 PM CDTSevere Thunderstorm WarningFSDLincoln31 min
Jun 19, 11:46 PM CDTSevere Thunderstorm WarningFSDBrule34 min
Jun 19, 11:49 PM CDTSevere Thunderstorm WarningFSDBeadle, Jerauld31 min
Jun 20, 12:25 AM CDTSevere Thunderstorm WarningFSDBeadle35 min
Jun 20, 3:05 AM CDTSevere Thunderstorm WarningFSDBrule45 min
Jun 20, 3:23 AM CDTSevere Thunderstorm WarningFSDTurner32 min
Jun 20, 3:40 AM CDTSevere Thunderstorm WarningFSDAurora50 min
Jun 20, 4:05 AM CDTSevere Thunderstorm WarningFSDBrule35 min
Jun 20, 4:13 AM CDTSevere Thunderstorm WarningFSDDavison32 min
Jun 20, 4:32 AM CDTSevere Thunderstorm WarningFSDHanson33 min
Jun 20, 4:41 AM CDTSevere Thunderstorm WarningFSDBrule19 min
Jun 20, 4:45 AM CDTSevere Thunderstorm WarningFSDAurora, Douglas30 min
Jun 20, 5:00 AM CDTSevere Thunderstorm WarningFSDMinnehaha30 min
Jun 20, 5:14 AM CDTSevere Thunderstorm WarningFSDTurner31 min
Jun 20, 5:19 AM CDTSevere Thunderstorm WarningFSDDouglas, Hutchinson36 min
Jun 20, 5:32 AM CDTSevere Thunderstorm WarningFSDLincoln, Minnehaha33 min
Jun 20, 5:59 AM CDTSevere Thunderstorm WarningFSDHutchinson, Yankton31 min
Jun 20, 6:38 AM CDTSevere Thunderstorm WarningFSDLincoln, Union32 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 1997Every 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.