Alert archive / Wisconsin / Severe Thunderstorm Watches in 2017
Severe Thunderstorm Watch 319
The Storm Prediction Center issued this severe thunderstorm watch at Jun 12, 2017, 4:37 PM CDT for 35 counties in Wisconsin. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 12, 2017, 4:37 PM CDT (21:37 UTC)
- Expired
- Jun 12, 2017, 9:34 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 35 counties
Brown County, WI, Calumet County, WI, Columbia County, WI, Dane County, WI, Dodge County, WI, Door County, WI, Fond du Lac County, WI, Green County, WI, Green Lake County, WI, Iowa County, WI, Jefferson County, WI, Kenosha County, WI, Kewaunee County, WI, Lafayette County, WI, Manitowoc County, WI, Marathon County, WI, Marquette County, WI, Menominee County, WI, Milwaukee County, WI, Oconto County, WI, Outagamie County, WI, Ozaukee County, WI, Portage County, WI, Racine County, WI, Rock County, WI, Sauk County, WI, Shawano County, WI, Sheboygan County, WI, Walworth County, WI, Washington County, WI, Waukesha County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI, Wood County, WI
The radar
The Milwaukee radar (KMKX), 103 km from the middle of the area, began a volume at 21:40 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
- 10%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
15 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 12, 4:47 PM CDT | Severe Thunderstorm Warning | GRB | Portage, Wood | 58 min |
| Jun 12, 4:52 PM CDT | Severe Thunderstorm Warning | MKX | Fond du Lac | 23 min |
| Jun 12, 5:08 PM CDT | Severe Thunderstorm Warning | GRB | Waushara, Winnebago | 36 min |
| Jun 12, 5:39 PM CDT | Severe Thunderstorm Warning | GRB | Marathon, Portage, Wood | 51 min |
| Jun 12, 5:42 PM CDT | Severe Thunderstorm Warning | GRB | Waushara | 63 min |
| Jun 12, 6:05 PM CDT | Severe Thunderstorm Warning | GRB | Waupaca | 55 min |
| Jun 12, 6:21 PM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dodge, Fond du Lac, Green Lake, Marquette | 39 min |
| Jun 12, 6:30 PM CDT | Severe Thunderstorm Warning | GRB | Marathon, Portage | 30 min |
| Jun 12, 6:35 PM CDT | Severe Thunderstorm Warning | GRB | Calumet, Outagamie, Shawano, Waupaca, Winnebago | 40 min |
| Jun 12, 6:52 PM CDT | Severe Thunderstorm Warning | MKX | Dodge, Fond du Lac, Ozaukee, Sheboygan, Washington | 53 min |
| Jun 12, 6:53 PM CDT | Severe Thunderstorm Warning | GRB | Calumet, Winnebago | 52 min |
| Jun 12, 7:09 PM CDT | Severe Thunderstorm Warning | GRB | Outagamie, Shawano, Waupaca | 20 min |
| Jun 12, 7:38 PM CDT | Severe Thunderstorm Warning | MKX | Ozaukee, Sheboygan, Washington | 37 min |
| Jun 12, 7:44 PM CDT | Severe Thunderstorm Warning | GRB | Calumet, Manitowoc | 46 min |
| Jun 12, 8:28 PM CDT | Severe Thunderstorm Warning | GRB | Kewaunee, Manitowoc | 36 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, 9.6 hours before the alert went out and 106 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
- 851 J/kg
- Mixed-layer CIN
- -179 J/kg
- Mixed-layer LCL
- 1158 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 166 m²/s²
- 0-3 km storm-relative helicity
- 137 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 11, 8:01 PM CDT | Severe Thunderstorm Watch | SPC | Clark, Door, Florence, Forest, Langlade, Lincoln and 7 more | 6 hr |
| Jun 11, 9:39 PM CDT | Mesoscale Discussion | SPC | Chippewa, Clark, Door, Eau Claire, Florence, Forest and 11 more | 2 hr |
| Jun 11, 11:59 PM CDT | Mesoscale Discussion | SPC | Door, Florence, Forest, Langlade, Marathon, Marinette and 3 more | 91 min |
| Jun 12, 11:28 AM CDT | Mesoscale Discussion | SPC | Crawford, La Crosse, Vernon | 92 min |
| Jun 12, 11:47 AM CDT | Severe Thunderstorm Watch | SPC | Adams, Buffalo, Crawford, Grant, Jackson, Juneau and 5 more | 7 hr |
| Jun 12, 2:22 PM CDT | Mesoscale Discussion | SPC | Buffalo, Crawford, Jackson, La Crosse, Monroe, Trempealeau and 1 more | 113 min |
| Jun 12, 6:38 PM CDT | Mesoscale Discussion | SPC | Brown, Calumet, Columbia, Dane, Dodge, Fond du Lac and 24 more | 2 hr |
Nearby
Severe Thunderstorm Watches in Wisconsin, 2017Every severe thunderstorm watch in 2017
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.