Alert archive / Wisconsin / Severe Thunderstorm Watches in 2017
Severe Thunderstorm Watch 137
The Storm Prediction Center issued this severe thunderstorm watch at Apr 10, 2017, 12:01 AM CDT for Dickinson County, Iron County, Marquette County, Michigan; 9 counties in Wisconsin. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 10, 2017, 12:01 AM CDT (05:01 UTC)
- Expired
- Apr 10, 2017, 3:11 AM CDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
Counties Dickinson County, MI, Iron County, MI, Marquette County, MI, Florence County, WI, Forest County, WI, Langlade County, WI, Lincoln County, WI, Marathon County, WI, Oneida County, WI, Portage County, WI, Vilas County, WI, Wood County, WI
The radar
The Green Bay radar (KGRB), 139 km from the middle of the area, began a volume at 05:03 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
- 30%
- One or more gusts of 65 knots or more
- 10%
- 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
14 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 10, 12:05 AM CDT | Severe Thunderstorm Warning | MQT | Gogebic, Iron | 25 min |
| Apr 10, 12:06 AM CDT | Severe Thunderstorm Warning | GRB | Forest, Vilas | 39 min |
| Apr 10, 12:12 AM CDT | Severe Thunderstorm Warning | GRB | Marathon | 48 min |
| Apr 10, 12:23 AM CDT | Severe Thunderstorm Warning | GRB | Oneida | 37 min |
| Apr 10, 12:27 AM CDT | Severe Thunderstorm Warning | GRB | Lincoln | 63 min |
| Apr 10, 12:30 AM CDT | Severe Thunderstorm Warning | MQT | Iron | 60 min |
| Apr 10, 12:54 AM CDT | Severe Thunderstorm Warning | GRB | Florence, Forest | 46 min |
| Apr 10, 12:59 AM CDT | Severe Thunderstorm Warning | GRB | Marathon | 31 min |
| Apr 10, 1:11 AM CDT | Severe Thunderstorm Warning | GRB | Langlade, Oneida | 33 min |
| Apr 10, 1:20 AM CDT | Severe Thunderstorm Warning | MQT | Iron, Marquette | 40 min |
| Apr 10, 1:23 AM CDT | Severe Thunderstorm Warning | GRB | Marathon, Menominee, Shawano | 25 min |
| Apr 10, 1:49 AM CDT | Severe Thunderstorm Warning | MQT | Dickinson | 26 min |
| Apr 10, 1:58 AM CDT | Severe Thunderstorm Warning | MQT | Marquette | 17 min |
| Apr 10, 2:14 AM CDT | Severe Thunderstorm Warning | MQT | Alger, Delta, Marquette | 61 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 00:00Z, 5.0 hours before the alert went out and 141 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
- 1 J/kg
- Mixed-layer CIN
- -294 J/kg
- Mixed-layer LCL
- 1327 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 210 m²/s²
- 0-3 km storm-relative helicity
- 270 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 10, 2:16 AM CDT | Mesoscale Discussion | SPC | Alger, Delta, Dickinson, Marquette, Menominee, Schoolcraft | 119 min |
| Apr 10, 11:57 AM CDT | Mesoscale Discussion | SPC | Allegan, Berrien, Cass, Kalamazoo, Van Buren | 3 hr |
| Apr 10, 1:48 PM CDT | Severe Thunderstorm Watch | SPC | Allegan, Barry, Berrien, Branch, Calhoun, Cass and 16 more | 8 hr |
| Apr 10, 3:25 PM CDT | Mesoscale Discussion | SPC | Allegan, Berrien, Branch, Cass, Kalamazoo, Ottawa and 2 more | 2 hr |
| Apr 10, 6:22 PM CDT | Mesoscale Discussion | SPC | Allegan, Barry, Berrien, Branch, Calhoun, Cass and 18 more | 53 min |
| Apr 9, 8:06 PM CDT | Mesoscale Discussion | SPC | Barron, Buffalo, Chippewa, Clark, Dunn, Eau Claire and 8 more | 54 min |
| Apr 9, 9:01 PM CDT | Severe Thunderstorm Watch | SPC | Buffalo, Chippewa, Clark, Dunn, Eau Claire, Jackson and 3 more | 4 hr |
| Apr 9, 11:32 PM CDT | Mesoscale Discussion | SPC | Adams, Buffalo, Chippewa, Clark, Dunn, Eau Claire and 25 more | 58 min |
Nearby
Severe Thunderstorm Watches in Wisconsin, 2017Severe Thunderstorm Watches in Michigan, 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.