Alert archive / Wisconsin / Severe Thunderstorm Watches in 2012
Severe Thunderstorm Watch 410
The Storm Prediction Center issued this severe thunderstorm watch at Jun 19, 2012, 5:41 AM CDT for 14 counties in Wisconsin. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 19, 2012, 5:41 AM CDT (10:41 UTC)
- Expired
- Jun 19, 2012, 9:15 AM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
Counties Brown County, WI, Door County, WI, Kewaunee County, WI, Langlade County, WI, Lincoln County, WI, Marathon County, WI, Marinette County, WI, Menominee County, WI, Oconto County, WI, Outagamie County, WI, Portage County, WI, Shawano County, WI, Waupaca County, WI, Wood County, WI
The radar
The Green Bay radar (KGRB), 79 km from the middle of the area, began a volume at 10:41 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
- 50%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 6:14 AM CDT | Severe Thunderstorm Warning | GRB | Langlade, Lincoln, Marathon, Menominee, Shawano | 46 min |
| Jun 19, 6:51 AM CDT | Severe Thunderstorm Warning | GRB | Forest, Langlade, Marathon, Marinette, Menominee, Oconto and 1 more | 39 min |
| Jun 19, 7:24 AM CDT | Severe Thunderstorm Warning | GRB | Marinette, Menominee, Oconto, Shawano | 51 min |
| Jun 19, 8:28 AM CDT | Severe Thunderstorm Warning | GRB | Door | 32 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, 10.7 hours before the alert went out and 81 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
- 1546 J/kg
- Mixed-layer CIN
- -52 J/kg
- Mixed-layer LCL
- 638 m above ground
- 0-6 km bulk shear
- 66 kt
- 0-1 km storm-relative helicity
- 122 m²/s²
- 0-3 km storm-relative helicity
- 158 m²/s²
- Significant tornado parameter
- 1.7
- Supercell composite
- 8.5
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 2:39 AM CDT | Mesoscale Discussion | SPC | Barron, Buffalo, Burnett, Chippewa, Clark, Dunn and 13 more | 66 min |
| Jun 19, 3:25 AM CDT | Severe Thunderstorm Watch | SPC | Barron, Buffalo, Chippewa, Clark, Dunn, Eau Claire and 8 more | 5 hr |
| Jun 19, 4:16 AM CDT | Mesoscale Discussion | SPC | Barron, Buffalo, Chippewa, Clark, Dunn, Eau Claire and 8 more | 89 min |
| Jun 19, 5:11 AM CDT | Mesoscale Discussion | SPC | Brown, Door, Kewaunee, Langlade, Lincoln, Marathon and 8 more | 34 min |
| Jun 19, 6:22 AM CDT | Mesoscale Discussion | SPC | Brown, Clark, Door, Jackson, Kewaunee, Langlade and 12 more | 83 min |
| Jun 19, 7:52 AM CDT | Mesoscale Discussion | SPC | Brown, Door, Kewaunee, Langlade, Marinette, Menominee and 6 more | 53 min |
| Jun 19, 6:08 PM CDT | Tornado Watch | SPC | Barron, Burnett, Douglas, Polk, Washburn | 7 hr |
Nearby
Severe Thunderstorm Watches in Wisconsin, 2012Every severe thunderstorm watch in 2012
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.