Alert archive / Wisconsin / Severe Thunderstorm Watches in 2017
Severe Thunderstorm Watch 65
The Storm Prediction Center issued this severe thunderstorm watch at Mar 6, 2017, 7:42 PM CST for 17 counties in Wisconsin. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 6, 2017, 7:42 PM CST (01:42 UTC)
- Expired
- Mar 7, 2017, 12:42 AM CST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
Counties Adams County, WI, Columbia County, WI, Crawford County, WI, Dane County, WI, Grant County, WI, Green County, WI, Iowa County, WI, Jackson County, WI, Juneau County, WI, La Crosse County, WI, Lafayette County, WI, Marquette County, WI, Monroe County, WI, Richland County, WI, Sauk County, WI, Trempealeau County, WI, Vernon County, WI
The radar
The La Crosse radar (KARX), 47 km from the middle of the area, began a volume at 01:42 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
- 2%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 10%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 70%
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 |
|---|---|---|---|---|
| Mar 6, 8:33 PM CST | Severe Thunderstorm Warning | ARX | La Crosse, Vernon | 42 min |
| Mar 6, 8:55 PM CST | Severe Thunderstorm Warning | ARX | Monroe, Vernon | 50 min |
| Mar 6, 9:12 PM CST | Severe Thunderstorm Warning | ARX | Grant | 63 min |
| Mar 6, 9:30 PM CST | Severe Thunderstorm Warning | ARX | Adams, Juneau | 45 min |
| Mar 6, 9:40 PM CST | Severe Thunderstorm Warning | MKX | Sauk | 50 min |
| Mar 6, 9:42 PM CST | Severe Thunderstorm Warning | ARX | Richland, Vernon | 48 min |
| Mar 6, 9:45 PM CST | Severe Thunderstorm Warning | MKX | Iowa | 45 min |
| Mar 6, 10:00 PM CST | Severe Thunderstorm Warning | MKX | Lafayette | 45 min |
| Mar 6, 10:12 PM CST | Severe Thunderstorm Warning | ARX | Adams, Juneau | 48 min |
| Mar 6, 10:28 PM CST | Severe Thunderstorm Warning | MKX | Columbia, Marquette, Sauk | 47 min |
| Mar 6, 10:28 PM CST | Severe Thunderstorm Warning | MKX | Iowa | 17 min |
| Mar 6, 10:42 PM CST | Severe Thunderstorm Warning | MKX | Dane, Green, Iowa, Lafayette | 33 min |
| Mar 6, 10:57 PM CST | Severe Thunderstorm Warning | MKX | Dane, Iowa | 18 min |
| Mar 6, 11:08 PM CST | Severe Thunderstorm Warning | MKX | Columbia, Green Lake, Marquette, Sauk | 28 min |
| Mar 6, 11:13 PM CST | Severe Thunderstorm Warning | MKX | Dane, Green, Lafayette, Rock | 47 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, 1.7 hours before the alert went out and 219 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 522 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 441 m²/s²
- 0-3 km storm-relative helicity
- 425 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 |
|---|---|---|---|---|
| Mar 6, 6:11 PM CST | Mesoscale Discussion | SPC | Buffalo, Burnett, Dunn, Pepin, Pierce, Polk and 1 more | 2 hr |
| Mar 6, 7:00 PM CST | Mesoscale Discussion | SPC | Adams, Barron, Burnett, Chippewa, Clark, Eau Claire and 11 more | 2 hr |
| Mar 6, 10:15 PM CST | Mesoscale Discussion | SPC | Dane, Dodge, Jefferson, Rock, Walworth | 60 min |
| Mar 6, 10:35 PM CST | Severe Thunderstorm Watch | SPC | Dodge, Fond du Lac, Green Lake, Jefferson, Kenosha, Milwaukee and 7 more | 4 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.