Alert archive / Minnesota / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 74, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 13, 1997, 6:29 PM CDT for Cottonwood County, Jackson County, Minnesota. It was in force for 31 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 13, 1997, 6:29 PM CDT (23:29 UTC)
- Expired
- Jul 13, 1997, 7:00 PM CDT
- In force
- 31 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Cottonwood County, MN, Jackson County, MN
The radar
The Sioux Falls radar (KFSD), 129 km from the middle of the area, began a volume at 23:31 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 |
|---|---|---|---|
| Jul 13, 6:41 PM CDT | Thunderstorm Wind 52 | Windom, MN |
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 |
|---|---|---|---|
| Jul 13, 4:00 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 12:00Z, 11.5 hours before the alert went out and 283 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
- 825 J/kg
- Mixed-layer CIN
- -98 J/kg
- Mixed-layer LCL
- 1060 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 68 m²/s²
- 0-3 km storm-relative helicity
- 87 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFSD 132331 RRA SVRFSD MNC033-063-140000- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 629 PM CDT SUN JUL 13 1997 * SEVERE THUNDERSTORM WARNING FOR SOUTHERN COTTONWOOD COUNTY IN SOUTHWESTERN MINNESOTA NORTHERN JACKSON COUNTY IN SOUTHWESTERN MINNESOTA * UNTIL 700 PM CDT * SOME AREAS AFFECTED HERON LAKE AROUND 635 PM CDT * AT 625 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 14 MILES NORTHEAST OF WORTHINGTON OR 4 MILES NORTHWEST OF HERON LAKE MOVING EAST AT 30 MPH. AT SIGNS OF AN IMPENDING STORM...TOWERING THUNDERHEADS...DARKENING SKIES...LIGHTNING AND INCREASING WINDS...MOVE TO A PLACE OF SAFETY. TUNE TO NOAA WEATHER RADIO OR YOUR LOCAL MEDIA OUTLET FOR THE LATEST WEATHER INFORMATION. HARMON
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 13, 9:57 AM CDT, 8 hours 32 minutes earlier.
Area forecast discussion, Jul 13, 9:57 AM CDT, 8 hours 32 minutes before
SOUTH DAKOTA/NORTHWEST IOWA/SOUTHWEST MINNESOTA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SIOUX FALLS SD 955 AM CDT SUN JUL 13 1997 SOME ISOLATED SHOWERS REMAINED BETWEEN THE MISSOURI AND JAMES RIVERS OF SD AT 1445Z WILE THE THUNDERSTORMS HAD MOVED BEYOND OUR CWA IN NORTHWEST IA AND SOUTHWEST MN. UPPER LOW IS FORECAST TO TRACK EAST ALONG THE ND/SD BORDER THIS AFTERNOON AND EVENING. THIS SHOULD KEEP THE BEST CONVERGENCE AND LIFT TO THE NORTH OF OUR CWA. BUT COOLING ALOFT AND H5 AND DIURNAL HEATING IS EXPECTED TO CREATE SCATTERED THUNDERSTORMS ACROSS THE CWA AS IN EARLIER FORECAST. WILL UPDATE THE ZONES TO CHANGE SOME WORDING AND TO SLOW DOWN THE FORECAST WIND SHIFT. .FSD...NONE UML(AND
In the hours before
Local storm report, Jul 13, 6:18 PM CDT, 11 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
618 PM CDT SUN JUL 13 1997
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0345 PM HARTFORD SD 1.00 INCH HAIL
07/13/97 MINNEHAHA 4 SOUTHEAST OF HARTOFRD
NWSLocal storm report, Jul 13, 6:20 PM CDT, 9 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
618 PM CDT SUN JUL 13 1997
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0345t PM HARTFORD SD 1.00 INCH HAIL
07/13/97 MINNEHAHA 4 SOUTHEAST OF HARTOFRD
NWSLocal storm report, Jul 13, 6:23 PM CDT, 6 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
623 PM CDT SUN JUL 13 1997
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0357 PM CROOKS SD 0.75 INCH HAIL
07/13/97 MINNEHAHA
0418 PM BALTIC SD 3.00 INCH HAIL
07/13/97 MINNEHAHA BROKE WINDOWS AT EROS
DATA CENTER
0355 PM ELLIS MN 0.75 INCH HAIL
07/13/97 MINNEHAHA CROP DAMAGE
0445 PM JASPER MN 1.00 INCH HAIL
07/13/97 ROCK 5 MILES WEST
0345 PM HARTFORD SD 3.00 INCH HAIL
07/13/97 MINNEHAHA 5 SOUTHEAST OF HARTFORD
NWSLocal storm report, Jul 13, 6:25 PM CDT, 4 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
623 PM CDT SUN JUL 13 1997
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0357 PM CROOKS SD 0.75 INCH HAIL
07/13/97 MINNEHAHA
0418 PM BALTIC SD 3.00 INCH HAIL
07/13/97 MINNEHAHA BROKE WINDOWS AT EROS
DATA CENTER
0355 PM ELLIS MN 0.75 INCH HAIL
07/13/97 MINNEHAHA CROP DAMAGE
0445 PM JASPER MN 1.00 INCH HAIL
07/13/97 ROCK 5 MILES WEST
0345 PM HARTFORD SD 3.00 INCH HAIL
07/13/97 MINNEHAHA 5 SOUTHEAST OF HARTFORD
NWSLocal storm report, Jul 13, 6:28 PM CDT, 1 minute before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
628 PM CDT SUN JUL 13 1997
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0440 PM GARRETSON SD 1.00 INCH HAIL
07/13/97 MINNEHAHA 5 MILES NORTH
0510 PM JASPER MN 0.75 INCH HAIL
07/13/97 ROCK 5SE OF JASPER
0515 PM HARDWICK MN 1.75 INCH HAIL
07/13/97 ROCK
0525 PM HARDWICK MN 0.75 INCH HAIL
07/13/97 ROCK 4 NORTHEAST OF HARDWICK
0345 PM HARTFORD SD 1.00 INCH HAIL
07/13/97 MINNEHAHA 5 SOUTHEAST OF HARTFORD
0357 PM CROOKS SD 0.75 INCH HAIL
07/13/97 MINNEHAHA
0418 PM BALTIC SD 2.75 INCH HAIL
07/13/97 MINNEHAHA 3 EAST OF BALTIC
0355 PM ELLIS MN 0.75 INCH HAIL
07/13/97 MINNEHAHA CROP DAMAGE
0445 PM JASPER MN 1.00 INCH HAIL
07/13/97 ROCK 5 MILES WEST OF JASPER
0345 PM HARTFORD SD 3.00 INCH HAIL
07/13/97 MINNEHAHA 5 SOUTHEAST OF HARTFORD
0445 PM GARRETSON SD 1.00 INCH HAIL
07/13/97 MINNEHAHA 5 MILES NORTH
0510 PM JASPER MN 0.75 INCH HAIL
07/13/97 ROCK 5 MLES SOUTHEAST OF JASPER
0515 PM HARDWICK MN 1.75 INCH HAIL
07/13/97 ROCK
0525 PM HARDWICK MN 0.75 INCH HAIL
07/13/97 ROCK 3 NORTHEAST OF HARDWICK
NWSThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 4:36 PM CDT | Severe Thunderstorm Warning | FSD | Pipestone | 34 min |
| Jul 13, 5:04 PM CDT | Severe Thunderstorm Warning | FSD | Rock | 31 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.