Alert archive / Wisconsin / Severe Thunderstorm Watches in 2012
Severe Thunderstorm Watch 611
The Storm Prediction Center issued this severe thunderstorm watch at Sep 3, 2012, 4:01 PM EDT for 10 counties in Michigan; 15 counties in Wisconsin. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 3, 2012, 4:01 PM EDT (20:01 UTC)
- Expired
- Sep 3, 2012, 8:45 PM EDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 25 counties
Alger County, MI, Chippewa County, MI, Delta County, MI, Dickinson County, MI, Iron County, MI, Luce County, MI, Mackinac County, MI, Marquette County, MI, Menominee County, MI, Schoolcraft County, MI, Door County, WI, Florence County, WI, Forest County, WI, Langlade County, WI, Lincoln County, WI, Marathon County, WI, Marinette County, WI, Menominee County, WI, Oconto County, WI, Oneida County, WI, Portage County, WI, Shawano County, WI, Waupaca County, WI, Waushara County, WI, Wood County, WI
The radar
The Green Bay radar (KGRB), 117 km from the middle of the area, began a volume at 20:02 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
- 10%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
2 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 3, 4:14 PM EDT | Severe Thunderstorm Warning | MQT | Menominee | 46 min |
| Sep 3, 4:33 PM EDT | Severe Thunderstorm Warning | APX | Chippewa, Mackinac | 57 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 3, 1:43 PM EDT | Mesoscale Discussion | SPC | Alger, Charlevoix, Chippewa, Delta, Dickinson, Luce and 3 more | 2 hr |
| Sep 3, 7:59 PM EDT | Mesoscale Discussion | SPC | Door, Marinette, Menominee, Oconto | 61 min |
Nearby
Severe Thunderstorm Watches in Wisconsin, 2012Severe Thunderstorm Watches in Michigan, 2012Every severe thunderstorm watch in 2012
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.