Alert archive / Wisconsin / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 674
The Storm Prediction Center issued this severe thunderstorm watch at Sep 20, 2007, 5:37 PM CDT for 18 counties in Wisconsin. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 20, 2007, 5:37 PM CDT (22:37 UTC)
- Expired
- Sep 21, 2007, 1:00 AM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
Counties Barron County, WI, Buffalo County, WI, Burnett County, WI, Chippewa County, WI, Clark County, WI, Dunn County, WI, Eau Claire County, WI, Jackson County, WI, Pepin County, WI, Pierce County, WI, Polk County, WI, Price County, WI, Rusk County, WI, Saint Croix County, WI, Sawyer County, WI, Taylor County, WI, Trempealeau County, WI, Washburn County, WI
The radar
The Minneapolis radar (KMPX), 154 km from the middle of the area, began a volume at 22:39 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 SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 20%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 50%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 50%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 20, 6:07 PM CDT | Severe Thunderstorm Warning | MPX | Pierce, Saint Croix | 53 min |
| Sep 20, 6:56 PM CDT | Tornado Warning | MPX | Pierce, Saint Croix | 34 min |
| Sep 20, 8:51 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Dunn, Eau Claire | 21 min |
| Sep 20, 9:21 PM CDT | Severe Thunderstorm Warning | DLH | Burnett | 19 min |
| Sep 20, 9:29 PM CDT | Severe Thunderstorm Warning | MPX | Dunn, Saint Croix | 61 min |
| Sep 20, 9:44 PM CDT | Severe Thunderstorm Warning | MPX | Barron, Polk | 31 min |
| Sep 20, 9:58 PM CDT | Severe Thunderstorm Warning | DLH | Sawyer, Washburn | 33 min |
| Sep 20, 10:11 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa | 64 min |
| Sep 20, 10:16 PM CDT | Severe Thunderstorm Warning | MPX | Barron | 44 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
Nearby
Severe Thunderstorm Watches in Wisconsin, 2007Every severe thunderstorm watch in 2007
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.