Alert archive / Minnesota / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 89, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 24, 1997, 11:50 PM CDT for Lincoln County, Minnesota. It was in force for 35 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 24, 1997, 11:50 PM CDT (04:50 UTC)
- Expired
- Jul 25, 1997, 12:25 AM CDT
- In force
- 35 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County Lincoln County, MN
The radar
The Sioux Falls radar (KFSD), 99 km from the middle of the area, began a volume at 04:49 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 24, 10:00 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 4.8 hours before the alert went out and 177 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
- 2516 J/kg
- Mixed-layer CIN
- -57 J/kg
- Mixed-layer LCL
- 877 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 50 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 2.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFSD 250451 RRA SVRFSD MNC081-250525- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 1150 PM CDT THU JUL 24 1997 * SEVERE THUNDERSTORM WARNING FOR NORTHERN LINCOLN COUNTY IN SOUTHWESTERN MINNESOTA * UNTIL 1225 AM CDT * THIS STORM IS EXPECTED TO REMAIN IN RURAL AREAS. * AT 1148 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED DAMAGING WINDS 25 MILES NORTHEAST OF BROOKINGS OR 10 MILES NORTHWEST OF IVANHOE MOVING NORTHEAST AT 35 MPH. STRONG GUSTY WINDS...FREQUENT LIGHTNING...VERY HEAVY RAINFALL AND SMALL HAIL MAY ACCOMPANY THE STRONGER STORMS. UMLAND
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 24, 8:32 PM CDT, 3 hours 18 minutes earlier.
Area forecast discussion, Jul 24, 8:32 PM CDT, 3 hours 18 minutes before
SOUTH DAKOTA/NORTHWEST IOWA/SOUTHWEST MINNESOTA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SIOUX FALLS SD 832 PM CDT THU JUL 24 1997 NEXRAD RADAR AT SIOUX FALLS SHOWS SMALL CLUSTERS OF THUNDERSTORMS DVLPG JUST S OF LAKE ANDES...JUST N OF HURON AND AROUND THE SIOUX FALLS AREA. NEXRAD RADAR AT SIOUX FALLS HAS SHOWN SEVERE SIGNATURES WITH SOME OF THESE THUNDERSTORMS. FORECASTS ATTM LOOK REASONABLY GOOD SO UPDATES... IF ANY...SHOULD BE FOR MINOR CHANGES ONLY. NO TSTMS VCNTY FLASH FLOOD WATCH IN NORTHWEST IOWA ATTM BUT POTENTIAL STILL THERE FOR HEAVY RAIN TOWARD MIDNIGHT AND AFTER. .FSD...NONE BLOOM
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 12:57 AM CDT | Severe Thunderstorm Warning | FSD | Lyon | 48 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 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.