Alert archive / Wisconsin / Severe Thunderstorm Watches in 2018
Severe Thunderstorm Watch 308
The Storm Prediction Center issued this severe thunderstorm watch at Jul 25, 2018, 4:05 PM CDT for 23 counties in Iowa; 19 counties in Minnesota; 28 counties in Wisconsin. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 25, 2018, 4:05 PM CDT (21:05 UTC)
- Expired
- Jul 25, 2018, 11:00 PM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 70 counties
Allamakee County, IA, Black Hawk County, IA, Bremer County, IA, Butler County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Clayton County, IA, Emmet County, IA, Fayette County, IA, Floyd County, IA, Franklin County, IA, Grundy County, IA, Hancock County, IA, Hardin County, IA, Howard County, IA, Humboldt County, IA, Kossuth County, IA, Mitchell County, IA, Palo Alto County, IA, Winnebago County, IA, Winneshiek County, IA, Worth County, IA, Wright County, IA, Blue Earth County, MN, Brown County, MN, Dodge County, MN, Faribault County, MN, Fillmore County, MN, Freeborn County, MN, Goodhue County, MN, Houston County, MN, Le Sueur County, MN, Martin County, MN, Mower County, MN, Nicollet County, MN, Olmsted County, MN, Rice County, MN, Steele County, MN, Wabasha County, MN, Waseca County, MN, Watonwan County, MN, Winona County, MN, Adams County, WI, Buffalo County, WI, Chippewa County, WI, Clark County, WI, Columbia County, WI, Crawford County, WI, Dunn County, WI, Eau Claire County, WI, Grant County, WI, Green Lake County, WI, Iowa County, WI, Jackson County, WI, Juneau County, WI, La Crosse County, WI, Marathon County, WI, Marquette County, WI, Monroe County, WI, Pepin County, WI, Pierce County, WI, Portage County, WI, Richland County, WI, Sauk County, WI, Taylor County, WI, Trempealeau County, WI, Vernon County, WI, Waupaca County, WI, Waushara County, WI, Wood County, WI
The radar
The La Crosse radar (KARX), 107 km from the middle of the area, began a volume at 21:08 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
- 5%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 60%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 90%
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 |
|---|---|---|---|---|
| Jul 25, 4:27 PM CDT | Severe Thunderstorm Warning | MPX | Watonwan | 48 min |
| Jul 25, 4:39 PM CDT | Severe Thunderstorm Warning | DMX | Winnebago, Worth | 51 min |
| Jul 25, 5:12 PM CDT | Severe Thunderstorm Warning | MPX | Faribault, Martin | 33 min |
| Jul 25, 5:34 PM CDT | Severe Thunderstorm Warning | MPX | Faribault | 32 min |
| Jul 25, 5:44 PM CDT | Severe Thunderstorm Warning | DMX | Kossuth, Winnebago | 46 min |
| Jul 25, 6:05 PM CDT | Severe Thunderstorm Warning | DMX | Emmet, Kossuth, Palo Alto | 40 min |
| Jul 25, 6:12 PM CDT | Severe Thunderstorm Warning | GRB | Portage, Wood | 62 min |
| Jul 25, 6:18 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Hancock, Winnebago, Worth | 42 min |
| Jul 25, 6:44 PM CDT | Severe Thunderstorm Warning | GRB | Wood | 61 min |
| Jul 25, 6:48 PM CDT | Severe Thunderstorm Warning | ARX | Floyd, Mitchell | 41 min |
| Jul 25, 7:02 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo | 28 min |
| Jul 25, 7:11 PM CDT | Severe Thunderstorm Warning | ARX | Jackson, Juneau, Monroe | 36 min |
| Jul 25, 7:37 PM CDT | Severe Thunderstorm Warning | DMX | Franklin, Hancock, Wright | 38 min |
| Jul 25, 7:54 PM CDT | Severe Thunderstorm Warning | DMX | Humboldt, Webster, Wright | 29 min |
| Jul 25, 9:34 PM CDT | Severe Thunderstorm Warning | MKX | Green Lake | 26 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
Minneapolis, MN (KMPX), launched 12:00Z, 9.1 hours before the alert went out and 142 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
- 287 J/kg
- Mixed-layer CIN
- -165 J/kg
- Mixed-layer LCL
- 1643 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 49 m²/s²
- 0-3 km storm-relative helicity
- 107 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 3:47 PM CDT | Mesoscale Discussion | SPC | Allamakee, Cerro Gordo, Chickasaw, Dickinson, Emmet, Floyd and 9 more | 88 min |
| Jul 25, 6:29 PM CDT | Mesoscale Discussion | SPC | Allamakee, Black Hawk, Bremer, Buchanan, Butler, Calhoun and 24 more | 91 min |
Nearby
Severe Thunderstorm Watches in Wisconsin, 2018Severe Thunderstorm Watches in Iowa, 2018Severe Thunderstorm Watches in Minnesota, 2018Every severe thunderstorm watch in 2018
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.