Alert archive / South Dakota / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 78, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 22, 1997, 7:54 PM CDT for Charles Mix County, Gregory County, South Dakota. It was in force for 31 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
- Jul 22, 1997, 7:54 PM CDT (00:54 UTC)
- Expired
- Jul 22, 1997, 8:25 PM CDT
- In force
- 31 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Charles Mix County, SD, Gregory County, SD
The radar
The Sioux Falls radar (KFSD), 180 km from the middle of the area, began a volume at 00:55 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 22, 5:00 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 0.9 hours before the alert went out and 193 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
- 39 J/kg
- Mixed-layer CIN
- -128 J/kg
- Mixed-layer LCL
- 1535 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- -6 m²/s²
- 0-3 km storm-relative helicity
- 75 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.1
The text
As transmitted, in the capitals the NWS used until 2016.
962 WUUS1 KFSD 230055 RRA SVRFSD SDC023-053-230125- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 754 PM CDT TUE JUL 22 1997 * SEVERE THUNDERSTORM WARNING FOR EXTREME SOUTHERN CHARLES MIX COUNTY IN SOUTHEASTERN SOUTH DAKOTA EXTREME SOUTHEASTERN GREGORY COUNTY IN SOUTH CENTRAL SOUTH DAKOTA * UNTIL 825 PM CDT * SOME AREAS AFFECTED FAIRFAX AROUND 757 PM CDT FT RANDALL AROUND 810 PM CDT * AT 751 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 18 MILES SOUTHWEST OF LAKE ANDES OR 9 MILES SOUTHWEST OF FT RANDALL MOVING NORTHEAST AT 25 MPH. HOLMES
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 22, 10:12 AM CDT, 9 hours 42 minutes earlier.
Area forecast discussion, Jul 22, 10:12 AM CDT, 9 hours 42 minutes before
SOUTH DAKOTA/NORTHWEST IOWA/SOUTHWEST MINNESOTA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SIOUX FALLS SD 1010 AM CDT TUE JUL 22 1997 TSRA COMPLEX OVR WRN COUNTIES IN WAA STARTING TO AFFECT WRN CWA NOTED ERLR ON MRR PROF. USELESS CLOSED LOW DRFTG ACRS NRN MN. WK LOW LVL FLOW KEEPING MSTR PLENTIFUL IN REGIONAL RAOBS...SO ANYHING BEYOND PARTLY SUNNY SHOULD BE QUITE TEMPORARY. ERLY UPDT TO TSRA IN SCNTRL...NO OTHER UPDTS ANTICIPATED. .FSD...NBONE CHAPMAN
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 3:53 AM CDT | Severe Thunderstorm Warning | FSD | McCook | 32 min |
| Jul 23, 4:33 AM CDT | Severe Thunderstorm Warning | FSD | McCook | 32 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.