Alert archive / South Dakota / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 82, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 24, 1997, 1:22 AM CDT for Beadle County, South Dakota. It was in force for 63 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
- Jul 24, 1997, 1:22 AM CDT (06:22 UTC)
- Expired
- Jul 24, 1997, 2:25 AM CDT
- In force
- 63 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County Beadle County, SD
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 24, 1:30 AM CDT | Thunderstorm Wind 52 | Wolsey, 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 00:00Z, 6.4 hours before the alert went out and 55 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.
- Mixed-layer CAPE
- 2898 J/kg
- Mixed-layer CIN
- -60 J/kg
- Mixed-layer LCL
- 870 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 67 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 2.5
The text
As transmitted, in the capitals the NWS used until 2016.
128 WUUS1 KFSD 240623 RRA SVRFSD SDC005-240725- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 122 AM CDT THU JUL 24 1997 * SEVERE THUNDERSTORM WARNING FOR BEADLE COUNTY IN EASTCENTRAL SOUTH DAKOTA * UNTIL 225 AM CDT * SOME AREAS AFFECTED WOLSEY AROUND 130 AM CDT BONILLA AROUND 140 AM CDT BROADLAND AROUND 150 AM CDT HITCHCOCK AROUND 155 AM CDT HURON AROUND 200 AM CDT * AT 120 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 19 MILES WEST OF HURON OR 6 MILES WEST OF WOLSEY MOVING NORTHEAST AT 25 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 Jul 23, 8:43 PM CDT, 4 hours 39 minutes earlier.
Area forecast discussion, Jul 23, 8:43 PM CDT, 4 hours 39 minutes before
SOUTH DAKOTA/NORTHWEST IOWA/SOUTHWEST MINNESOTA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SIOUX FALLS SD 830 PM CDT WED JUL 23 1997 SFC WRMFNT EXTENDS FROM NR RAP SE TO 9V9 AND INTO NE NEB. TSTMS DVLPG N OF FNT AS MOIST SLY FLOW CONTS TO INTERSECT BNDRY. BEGINNING TO SEE THE FIRST INKLINGS OF INCRSG SLY FLO THAT MDLS ADVERTISE FOR LATER TNGT. MRR PROFILER SHOWS SLY WINDS HAVE INCRSD IN DEPTH AND NLG PROFILER SHOWG SIGNS OF BACKING WINDS WITH TIME. BOTH PROFILERS SHOW VEERING WINDS WITH HEIGHT WHICH SUPPORTS MDLS IDEA OF WAA SPREADING EWRD TNGT. BLV SLY LOW LEVEL WINDS WILL INCRS TO BECOME LOW LVL JET AFT 06Z WHICH NOSES UP INTO SERN SD. THIS ADVECTS HIER 850 DEWPOINTS WITH A NW TO SE ORIENTED BAND OF +14 TO +16 C DEWPOINTS BY 12Z OVR CWA. MEANWHILE UPPER LVL MSTR HAS INCRSD ACRS ST AS EVE RAOBS SHOW NR SATURATED FROM 500 MB UP AT RAP. THIS ALSO SEEN ON WTR VAPOR IMAGERY. EXPECT THIS MID AND UPPR LVL MSTR TO ADVECT INTO CWA LATE$R TNGT. IN ALL CURRNT FCST LOOKS GOOD WITH TSTMS DVLPG IN OUR CWA AFT MIDNIGHT. HAVE ALREADY UPDATED SUX THO TO TAKE OUT MENTION OF EVE TSTMS AS NOT MATERIALIZING. .FSD...NONE HOLMES
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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.