Alert archive / Wisconsin / Tornado Watches in 2010
Tornado Watch 745
The Storm Prediction Center issued this tornado watch at Nov 22, 2010, 1:16 PM CST for 14 counties in Wisconsin. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Nov 22, 2010, 1:16 PM CST (19:16 UTC)
- Expired
- Nov 22, 2010, 5:12 PM CST
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
Counties Dane County, WI, Dodge County, WI, Green County, WI, Iowa County, WI, Jefferson County, WI, Kenosha County, WI, Lafayette County, WI, Milwaukee County, WI, Ozaukee County, WI, Racine County, WI, Rock County, WI, Walworth County, WI, Washington County, WI, Waukesha County, WI
The radar
The Milwaukee radar (KMKX), 63 km from the middle of the area, began a volume at 19:17 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
- 30%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 22, 1:40 PM CST | Severe Thunderstorm Warning | MKX | Dane, Green, Iowa, Lafayette | 23 min |
| Nov 22, 3:09 PM CST | Tornado Warning | MKX | Walworth | 36 min |
| Nov 22, 3:33 PM CST | Tornado Warning | MKX | Kenosha, Racine | 57 min |
| Nov 22, 3:43 PM CST | Tornado Warning | MKX | Walworth | 17 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 7.3 hours before the alert went out and 184 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
- 31 J/kg
- Mixed-layer CIN
- -191 J/kg
- Mixed-layer LCL
- 422 m above ground
- 0-6 km bulk shear
- 73 kt
- 0-1 km storm-relative helicity
- 345 m²/s²
- 0-3 km storm-relative helicity
- 366 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 22, 2:32 AM CST | Mesoscale Discussion | SPC | Barron, Buffalo, Chippewa, Dunn, Eau Claire, Pepin and 7 more | 6 hr |
| Nov 22, 12:51 PM CST | Mesoscale Discussion | SPC | Dane, Green, Jefferson, Kenosha, Milwaukee, Rock and 2 more | 54 min |
| Nov 22, 3:33 PM CST | Mesoscale Discussion | SPC | Dodge, Jefferson, Kenosha, Milwaukee, Walworth, Washington and 1 more | 57 min |
Nearby
Tornado Watches in Wisconsin, 2010Every tornado watch in 2010
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.