Alert archive / Wisconsin / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 664
The Storm Prediction Center issued this severe thunderstorm watch at Jul 19, 2011, 5:43 PM CDT for 38 counties in Wisconsin. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 19, 2011, 5:43 PM CDT (22:43 UTC)
- Expired
- Jul 20, 2011, 1:00 AM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 65 kt
All 38 counties
Adams County, WI, Barron County, WI, Brown County, WI, Calumet County, WI, Chippewa County, WI, Clark County, WI, Columbia County, WI, Dodge County, WI, Dunn County, WI, Eau Claire County, WI, Fond du Lac County, WI, Green Lake County, WI, Jackson County, WI, Juneau County, WI, Kewaunee County, WI, Langlade County, WI, Lincoln County, WI, Manitowoc County, WI, Marathon County, WI, Marquette County, WI, Menominee County, WI, Oconto County, WI, Oneida County, WI, Outagamie County, WI, Ozaukee County, WI, Polk County, WI, Portage County, WI, Price County, WI, Rusk County, WI, Sawyer County, WI, Shawano County, WI, Sheboygan County, WI, Taylor County, WI, Washington County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI, Wood County, WI
The radar
The Green Bay radar (KGRB), 154 km from the middle of the area, began a volume at 22:46 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
- 80%
- 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
- 20%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
34 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 5:44 PM CDT | Severe Thunderstorm Warning | DLH | Sawyer, Washburn | 46 min |
| Jul 19, 5:51 PM CDT | Severe Thunderstorm Warning | MPX | Barron, Rusk | 54 min |
| Jul 19, 6:05 PM CDT | Tornado Warning | MPX | Barron, Rusk | 55 min |
| Jul 19, 6:45 PM CDT | Severe Thunderstorm Warning | MPX | Rusk | 60 min |
| Jul 19, 6:50 PM CDT | Severe Thunderstorm Warning | ARX | Clark, Taylor | 55 min |
| Jul 19, 6:54 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa | 66 min |
| Jul 19, 6:56 PM CDT | Severe Thunderstorm Warning | DLH | Price | 19 min |
| Jul 19, 7:06 PM CDT | Tornado Warning | MPX | Polk | 39 min |
| Jul 19, 7:19 PM CDT | Tornado Warning | ARX | Clark, Taylor | 26 min |
| Jul 19, 7:29 PM CDT | Severe Thunderstorm Warning | GRB | Marathon | 61 min |
| Jul 19, 7:29 PM CDT | Tornado Warning | MPX | Barron | 61 min |
| Jul 19, 7:43 PM CDT | Tornado Warning | ARX | Clark, Taylor | 32 min |
| Jul 19, 7:45 PM CDT | Severe Thunderstorm Warning | ARX | Clark, Taylor | 60 min |
| Jul 19, 7:46 PM CDT | Severe Thunderstorm Warning | MPX | Polk | 44 min |
| Jul 19, 8:01 PM CDT | Severe Thunderstorm Warning | GRB | Wood | 59 min |
| Jul 19, 8:30 PM CDT | Severe Thunderstorm Warning | GRB | Marathon | 33 min |
| Jul 19, 8:37 PM CDT | Flash Flood Warning | ARX | Clark, Taylor | 4 hr |
| Jul 19, 8:37 PM CDT | Severe Thunderstorm Warning | MPX | Barron, Chippewa, Dunn, Eau Claire | 53 min |
| Jul 19, 8:40 PM CDT | Flash Flood Warning | MPX | Barron, Chippewa, Dunn, Rusk | 3 hr |
| Jul 19, 8:41 PM CDT | Flash Flood Warning | GRB | Marathon, Portage, Wood | 3 hr |
| Jul 19, 8:45 PM CDT | Severe Thunderstorm Warning | ARX | Clark, Taylor | 60 min |
| Jul 19, 9:41 PM CDT | Flash Flood Warning | ARX | Clark | 3 hr |
| Jul 19, 9:42 PM CDT | Severe Thunderstorm Warning | MPX | Eau Claire | 37 min |
| Jul 19, 9:45 PM CDT | Severe Thunderstorm Warning | ARX | Clark, Jackson, Trempealeau | 60 min |
| Jul 19, 9:46 PM CDT | Severe Thunderstorm Warning | GRB | Portage | 59 min |
| Jul 19, 10:01 PM CDT | Severe Thunderstorm Warning | GRB | Wood | 31 min |
| Jul 19, 10:20 PM CDT | Severe Thunderstorm Warning | GRB | Waupaca | 40 min |
| Jul 19, 10:21 PM CDT | Severe Thunderstorm Warning | GRB | Portage, Wood | 39 min |
| Jul 19, 10:27 PM CDT | Severe Thunderstorm Warning | ARX | Adams, Juneau | 63 min |
| Jul 19, 10:49 PM CDT | Severe Thunderstorm Warning | GRB | Waushara | 41 min |
| Jul 19, 10:56 PM CDT | Severe Thunderstorm Warning | GRB | Waupaca | 34 min |
| Jul 19, 10:58 PM CDT | Severe Thunderstorm Warning | MKX | Green Lake, Marquette | 62 min |
| Jul 19, 11:47 PM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dodge, Fond du Lac, Green Lake, Marquette | 58 min |
| Jul 19, 11:58 PM CDT | Flash Flood Warning | GRB | Marathon, Portage, Wood | 116 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
Green Bay/Straub, WI (KGRB), launched 12:00Z, 10.7 hours before the alert went out and 156 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
- 1299 J/kg
- Mixed-layer CIN
- -59 J/kg
- Mixed-layer LCL
- 875 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- -35 m²/s²
- 0-3 km storm-relative helicity
- 115 m²/s²
- Significant tornado parameter
- -0.1
- Supercell composite
- -1.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 9:06 PM CDT | Mesoscale Discussion | SPC | Columbia, Dane, Dodge, Fond du Lac, Green, Green Lake and 14 more | 54 min |
| Jul 19, 9:07 AM CDT | Severe Thunderstorm Watch | SPC | Barron, Buffalo, Burnett, Chippewa, Clark, Dunn and 14 more | 6 hr |
| Jul 19, 11:57 AM CDT | Mesoscale Discussion | SPC | Buffalo, Crawford, La Crosse, Pepin, Pierce, Trempealeau and 1 more | 93 min |
| Jul 19, 1:04 PM CDT | Mesoscale Discussion | SPC | Crawford, Grant, Green, Iowa, La Crosse, Lafayette and 3 more | 86 min |
| Jul 19, 5:28 PM CDT | Mesoscale Discussion | SPC | Barron, Chippewa, Clark, Langlade, Lincoln, Marathon and 14 more | 62 min |
Nearby
Severe Thunderstorm Watches in Wisconsin, 2011Every severe thunderstorm watch in 2011
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.