Alert archive / Minnesota / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 41, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 22, 1997, 5:02 PM CDT for Lincoln County, Minnesota; Brookings County, South Dakota. It was in force for 48 min. 6 reports 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
- Jun 22, 1997, 5:02 PM CDT (22:02 UTC)
- Expired
- Jun 22, 1997, 5:50 PM CDT
- In force
- 48 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Lincoln County, MN, Brookings County, SD
The radar
The Sioux Falls radar (KFSD), 91 km from the middle of the area, began a volume at 22:04 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 22, 5:10 PM CDT | Hail 1.75 | Bruce, SD | Large hail devastated thousands of acres of corn and soybean crops, broke windows, and damaged siding. The hail fell over most of the northern half of Brookings County. |
| Jun 22, 5:30 PM CDT | Tornado F0 | Brookings, SD | A brief tornado observed by spotters caused no damage. |
| Jun 22, 5:39 PM CDT | Tornado F0 | Aurora, SD | A brief tornado observed by a National Weather Service employee and other spotters caused no damage. |
| Jun 22, 5:45 PM CDT | Hail 1.75 | Lake Benton, MN | Large hail devastated crops in most of Lincoln County. An estimated 180 thousand acres of crops were affected, with 80 thousand acres totally destroyed. |
| Jun 22, 5:45 PM CDT | Thunderstorm Wind 52 | Lake Benton, MN | Thunderstorm winds caused tree damage and other minor property damage in much of Lincoln County. |
| Jun 22, 5:50 PM CDT | Thunderstorm Wind 52 | White, SD | Thunderstorm winds uprooted a few trees, caused other tree damage, and blew shingles off of roofs. |
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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 22, 5:00 PM CDT | Tornado Watch | SPC | 5 hr |
| Jun 22, 12:00 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 12:00Z, 10.0 hours before the alert went out and 158 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
- 1357 J/kg
- Mixed-layer CIN
- -46 J/kg
- Mixed-layer LCL
- 762 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 79 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.9
The text
As transmitted, in the capitals the NWS used until 2016.
847 WUUS1 KFSD 222202 RRA SVRFSD MNC081-SDC011-222250- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 502 PM CDT SUN JUN 22 1997 * SEVERE THUNDERSTORM WARNING FOR NORTHERN BROOKINGS COUNTY - IN EASTCENTRAL SOUTH DAKOTA NORTHERN LINCON COUNTY - IN SOUTHWESTERN MINNESOTA * UNTIL 550 PM CDT * SOME AREAS AFFECTED WHITE AROUND 520 PM CDT IVANHOE AROUND 530 PM CDT * AT 458 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 20 MILES NORTH OF BROOKINGS OR 15 MILES NORTHWEST OF WHITE MOVING SOUTHEAST AT 30 MPH. A TORNADO WATCH IS ALSO IN EFFECT. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES...SO GO TO YOUR DESIGNATED SHELTER. RSR
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 22, 10:08 AM CDT, 6 hours 54 minutes earlier.
Area forecast discussion, Jun 22, 10:08 AM CDT, 6 hours 54 minutes before
SOUTH DAKOTA/NORTHWEST IOWA/SOUTHWEST MINNESOTA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SIOUX FALLS SD 1005 AM CDT SUN JUN 22 1997 MADE SOME CHGS TO PREV FCST. MAIN LIFT AND DYNAMICS SHUD BE NRN PART@ OF CWA THIS AFTN WITH BEST HEATING S. WL UP POPS TO 60 UP N AND RAISE TEMPS TO LWR TO MID 90S S. WL ALSO ADJUST FCST FOR TNGT AND MON AS SHUD BE CAPPING OFF TO SOME EXTENT AND WIND SHIFT NOT LIKELY. .FSD...NONE RYRHOLM
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 22, 5:26 PM CDT | Tornado Warning | FSD | Lincoln | 29 min |
| Jun 22, 5:45 PM CDT | Severe Thunderstorm Warning | FSD | Lyon | 45 min |
| Jun 22, 5:56 PM CDT | Tornado Warning | FSD | Lincoln | 29 min |
| Jun 22, 6:19 PM CDT | Severe Thunderstorm Warning | FSD | Murray, Pipestone | 46 min |
| Jun 22, 6:30 PM CDT | Severe Thunderstorm Warning | FSD | Lyon | 30 min |
| Jun 22, 6:58 PM CDT | Severe Thunderstorm Warning | FSD | Cottonwood, Murray | 47 min |
| Jun 22, 4:25 AM CDT | Severe Thunderstorm Warning | FSD | Gregory | 30 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 1997Severe 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; radar from the NEXRAD Level II archive.