Alert archive / Minnesota / Severe Thunderstorm Watches in 1997
Severe Thunderstorm Watch 657
The Storm Prediction Center issued this severe thunderstorm watch at Jul 26, 1997, 11:00 AM CDT for 18 counties in Iowa; 20 counties in Minnesota; 9 counties in Wisconsin. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 26, 1997, 11:00 AM CDT (16:00 UTC)
- Expired
- Jul 26, 1997, 5:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 47 counties
Allamakee County, IA, Bremer County, IA, Butler County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Clayton County, IA, Fayette County, IA, Floyd County, IA, Franklin County, IA, Hancock County, IA, Howard County, IA, Humboldt County, IA, Kossuth County, IA, Mitchell County, IA, Winnebago County, IA, Winneshiek County, IA, Worth County, IA, Wright County, IA, Blue Earth County, MN, Dodge County, MN, Faribault County, MN, Fillmore County, MN, Freeborn County, MN, Goodhue County, MN, Houston County, MN, Le Sueur County, MN, Martin County, MN, Mower County, MN, Nicollet County, MN, Olmsted County, MN, Rice County, MN, Scott County, MN, Sibley County, MN, Steele County, MN, Wabasha County, MN, Waseca County, MN, Watonwan County, MN, Winona County, MN, Buffalo County, WI, Crawford County, WI, Grant County, WI, Jackson County, WI, La Crosse County, WI, Monroe County, WI, Pepin County, WI, Trempealeau County, WI, Vernon County, WI
The radar
The Minneapolis radar (KMPX), 120 km from the middle of the area, began a volume at 16:03 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.
Warnings issued inside it
3 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 26, 12:38 PM CDT | Severe Thunderstorm Warning | ARX | Floyd, Mitchell | 67 min |
| Jul 26, 3:18 PM CDT | Flash Flood Warning | ARX | Vernon | 4 hr |
| Jul 26, 3:30 PM CDT | Severe Thunderstorm Warning | ARX | Juneau, Vernon | 45 min |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 4.0 hours before the alert went out and 320 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
- 2842 J/kg
- Mixed-layer CIN
- -135 J/kg
- Mixed-layer LCL
- 1370 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 18 m²/s²
- 0-3 km storm-relative helicity
- 63 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 7:45 PM CDT | Tornado Watch | SPC | Jackson | 5 hr |
| Jul 25, 11:00 PM CDT | Severe Thunderstorm Watch | SPC | Cherokee, Dickinson, Lyon, O'Brien, Osceola, Sioux | 4 hr |
| Jul 26, 4:00 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Calumet, Columbia, Dane, Dodge, Fond du Lac and 19 more | 6 hr |
Nearby
Severe Thunderstorm Watches in Minnesota, 1997Severe Thunderstorm Watches in Iowa, 1997Severe Thunderstorm Watches in Wisconsin, 1997Every severe thunderstorm watch 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.