Alert archive / South Dakota / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 116, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 13, 1997, 9:18 PM CDT for Gregory County, South Dakota. It was in force for 47 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 13, 1997, 9:18 PM CDT (02:18 UTC)
- Expired
- Aug 13, 1997, 10:05 PM CDT
- In force
- 47 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County Gregory County, SD
The radar
The North Platte radar (KLNX), 178 km from the middle of the area, began a volume at 02:17 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, 2.3 hours before the alert went out and 200 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1312 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 80 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
927 WUUS1 KFSD 140219 RRA SVRFSD SDC053-140305- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 918 PM CDT WED AUG 13 1997 * SEVERE THUNDERSTORM WARNING FOR NORTHERN GREGORY COUNTY IN SOUTHCENTRAL SOUTH DAKOTA * UNTIL 1005 PM CDT * SOME AREAS AFFECTED DIXON AROUND 925 PM CDT LUCAS AROUND 955 PM CDT * AT 915 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 15 MILES NORTHEAST OF WINNER OR 7 MILES NORTHWEST OF DIXON MOVING EAST AT 30 MPH. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH... DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. RUBY
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 Aug 13, 9:00 PM CDT, 18 minutes earlier.
Area forecast discussion, Aug 13, 9:00 PM CDT, 18 minutes before
SOUTH DAKOTA/NORTHWEST IOWA/SOUTHWEST MINNESOTA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SIOUX FALLS SD 900 PM CDT WED AUG 13 1997 LOW LVL JET SHOWING UP WELL ON NLG PROFILER WITH 30KTS IN LOWER GATES. 8MA ALSO SHOWING JET ACROSS SW TO NE NEB...WITH WDL BEGINNING TO BACK FM W TO SWLY DIRECTION. SFC ANALYSIS SHOWS WK SFC LOW CNTRD N OF VTN WITH TSTMS AHD OF THIS FEATURE ALONG AXIS OF BEST SFC MOIST CONVG. CURRENT ZFP HANDLING SITUATION WELL. ANTICIPATE ONLY MINOR WORDING CHANGES TO REFLECT CURRENT ACTIVITY. .FSD...NONE MC MAHON
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.