Alert archive / Wisconsin / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 416
The Storm Prediction Center issued this severe thunderstorm watch at Jun 18, 2007, 1:46 PM EDT for 9 counties in Michigan; 8 counties in Minnesota; 46 counties in Wisconsin. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 18, 2007, 1:46 PM EDT (17:46 UTC)
- Expired
- Jun 18, 2007, 9:00 PM EDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 63 counties
Baraga County, MI, Dickinson County, MI, Gogebic County, MI, Houghton County, MI, Iron County, MI, Keweenaw County, MI, Marquette County, MI, Menominee County, MI, Ontonagon County, MI, Dodge County, MN, Fillmore County, MN, Goodhue County, MN, Houston County, MN, Mower County, MN, Olmsted County, MN, Wabasha County, MN, Winona County, MN, Adams County, WI, Ashland County, WI, Barron County, WI, Bayfield County, WI, Brown County, WI, Buffalo County, WI, Calumet County, WI, Chippewa County, WI, Clark County, WI, Door County, WI, Dunn County, WI, Eau Claire County, WI, Florence County, WI, Forest County, WI, Iron County, WI, Jackson County, WI, Juneau County, WI, Kewaunee County, WI, La Crosse County, WI, Langlade County, WI, Lincoln County, WI, Manitowoc County, WI, Marathon County, WI, Marinette County, WI, Menominee County, WI, Monroe County, WI, Oconto County, WI, Oneida County, WI, Outagamie County, WI, Pepin County, WI, Pierce County, WI, Portage County, WI, Price County, WI, Rusk County, WI, Saint Croix County, WI, Sawyer County, WI, Shawano County, WI, Taylor County, WI, Trempealeau County, WI, Vernon County, WI, Vilas County, WI, Washburn County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI, Wood County, WI
The radar
The La Crosse radar (KARX), 142 km from the middle of the area, began a volume at 17:48 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
- 60%
- One or more gusts of 65 knots or more
- 30%
- 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
12 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 2:06 PM EDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield | 54 min |
| Jun 18, 2:54 PM EDT | Severe Thunderstorm Warning | DLH | Ashland, Iron | 66 min |
| Jun 18, 5:35 PM EDT | Severe Thunderstorm Warning | MQT | Baraga, Houghton, Iron | 40 min |
| Jun 18, 5:41 PM EDT | Severe Thunderstorm Warning | GRB | Marathon | 49 min |
| Jun 18, 5:47 PM EDT | Severe Thunderstorm Warning | GRB | Florence, Forest, Langlade | 43 min |
| Jun 18, 6:14 PM EDT | Severe Thunderstorm Warning | MQT | Dickinson, Iron, Marquette | 46 min |
| Jun 18, 6:21 PM EDT | Severe Thunderstorm Warning | GRB | Menominee, Shawano | 39 min |
| Jun 18, 6:30 PM EDT | Severe Thunderstorm Warning | GRB | Florence, Forest, Langlade | 31 min |
| Jun 18, 6:43 PM EDT | Severe Thunderstorm Warning | GRB | Oconto | 47 min |
| Jun 18, 6:57 PM EDT | Severe Thunderstorm Warning | GRB | Menominee, Shawano | 48 min |
| Jun 18, 7:14 PM EDT | Severe Thunderstorm Warning | GRB | Marinette | 46 min |
| Jun 18, 7:26 PM EDT | Severe Thunderstorm Warning | GRB | Oconto | 49 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, 5.8 hours before the alert went out and 187 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
- 1126 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 1156 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 89 m²/s²
- 0-3 km storm-relative helicity
- 82 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 12:06 PM EDT | Mesoscale Discussion | SPC | Baraga, Dickinson, Gogebic, Houghton, Iron, Keweenaw and 2 more | 54 min |
| Jun 18, 4:27 PM EDT | Mesoscale Discussion | SPC | Alger, Baraga, Dickinson, Gogebic, Iron, Marquette and 2 more | 93 min |
| Jun 18, 7:19 PM EDT | Mesoscale Discussion | SPC | Dickinson, Marquette, Menominee | 86 min |
| Jun 17, 8:59 PM EDT | Mesoscale Discussion | SPC | Beltrami, Clay, Clearwater, Itasca, Kittson, Koochiching and 9 more | 91 min |
| Jun 17, 11:43 PM EDT | Mesoscale Discussion | SPC | Becker, Big Stone, Clay, Clearwater, Grant, Kittson and 9 more | 62 min |
| Jun 18, 1:03 AM EDT | Severe Thunderstorm Watch | SPC | Becker, Beltrami, Clay, Clearwater, Grant, Hubbard and 12 more | 3 hr |
| Jun 18, 1:44 AM EDT | Mesoscale Discussion | SPC | Aitkin, Beltrami, Benton, Carlton, Cass, Clearwater and 14 more | 61 min |
| Jun 18, 2:09 AM EDT | Severe Thunderstorm Watch | SPC | Aitkin, Cass, Crow Wing, Itasca, Koochiching | 3 hr |
Nearby
Severe Thunderstorm Watches in Wisconsin, 2007Severe Thunderstorm Watches in Michigan, 2007Severe Thunderstorm Watches in Minnesota, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.