Alert archive / Minnesota / Severe Thunderstorm Watches in 1997
Severe Thunderstorm Watch 720
The Storm Prediction Center issued this severe thunderstorm watch at Sep 1, 1997, 1:45 PM CDT for 43 counties in Minnesota; 14 counties in Wisconsin. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 1, 1997, 1:45 PM CDT (18:45 UTC)
- Expired
- Sep 1, 1997, 8:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 57 counties
Anoka County, MN, Benton County, MN, Blue Earth County, MN, Brown County, MN, Carver County, MN, Chippewa County, MN, Chisago County, MN, Cottonwood County, MN, Dakota County, MN, Goodhue County, MN, Hennepin County, MN, Isanti County, MN, Kanabec County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Le Sueur County, MN, Lincoln County, MN, Lyon County, MN, McLeod County, MN, Meeker County, MN, Mille Lacs County, MN, Morrison County, MN, Murray County, MN, Nicollet County, MN, Nobles County, MN, Pine County, MN, Pipestone County, MN, Pope County, MN, Ramsey County, MN, Redwood County, MN, Renville County, MN, Rice County, MN, Rock County, MN, Scott County, MN, Sherburne County, MN, Sibley County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Washington County, MN, Watonwan County, MN, Wright County, MN, Yellow Medicine County, MN, Barron County, WI, Bayfield County, WI, Burnett County, WI, Chippewa County, WI, Douglas County, WI, Dunn County, WI, Eau Claire County, WI, Pepin County, WI, Pierce County, WI, Polk County, WI, Rusk County, WI, Saint Croix County, WI, Sawyer County, WI, Washburn County, WI
The radar
The Minneapolis radar (KMPX), 68 km from the middle of the area, began a volume at 18:48 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
12 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 1, 1:56 PM CDT | Severe Thunderstorm Warning | MPX | Kanabec | 49 min |
| Sep 1, 2:21 PM CDT | Severe Thunderstorm Warning | DLH | Burnett, Washburn | 69 min |
| Sep 1, 2:49 PM CDT | Severe Thunderstorm Warning | DLH | Pine | 61 min |
| Sep 1, 3:20 PM CDT | Tornado Warning | DLH | Burnett | 25 min |
| Sep 1, 3:43 PM CDT | Severe Thunderstorm Warning | DLH | Sawyer, Washburn | 57 min |
| Sep 1, 4:22 PM CDT | Severe Thunderstorm Warning | MPX | Rusk | 53 min |
| Sep 1, 4:27 PM CDT | Severe Thunderstorm Warning | DLH | Burnett | 63 min |
| Sep 1, 5:06 PM CDT | Flash Flood Warning | DLH | Burnett, Washburn | 3 hr |
| Sep 1, 5:09 PM CDT | Severe Thunderstorm Warning | MPX | Barron, Polk | 66 min |
| Sep 1, 5:12 PM CDT | Severe Thunderstorm Warning | MPX | Rusk | 48 min |
| Sep 1, 6:57 PM CDT | Severe Thunderstorm Warning | MPX | Pepin | 33 min |
| Sep 1, 7:25 PM CDT | Severe Thunderstorm Warning | MPX | Eau Claire, Pepin | 35 min |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 6.8 hours before the alert went out and 66 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
- 751 J/kg
- Mixed-layer CIN
- -155 J/kg
- Mixed-layer LCL
- 739 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 215 m²/s²
- 0-3 km storm-relative helicity
- 203 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.7
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
Nearby
Severe Thunderstorm Watches in Minnesota, 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.