Alert archive / Wisconsin / Mesoscale Discussions in 2017
Mesoscale Discussion 729
The Storm Prediction Center issued this mesoscale discussion at May 16, 2017, 12:57 PM CDT for 13 counties in Wisconsin. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- May 16, 2017, 12:57 PM CDT (17:57 UTC)
- Expired
- May 16, 2017, 3:00 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
Counties Buffalo County, WI, Clark County, WI, Eau Claire County, WI, Jackson County, WI, Marathon County, WI, Menominee County, WI, Oconto County, WI, Outagamie County, WI, Portage County, WI, Shawano County, WI, Trempealeau County, WI, Waupaca County, WI, Wood County, WI
The radar
The La Crosse radar (KARX), 112 km from the middle of the area, began a volume at 18:00 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.
The watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 12:00Z, 6.0 hours before the alert went out and 158 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
- 1146 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 73 m²/s²
- 0-3 km storm-relative helicity
- 7 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 15, 7:19 PM CDT | Mesoscale Discussion | SPC | Crawford, Dane, Grant, Green, Iowa, Lafayette and 4 more | 56 min |
| May 15, 7:52 PM CDT | Severe Thunderstorm Watch | SPC | Dane, Green, Iowa, Jefferson, Kenosha, Lafayette and 3 more | 3 hr |
| May 15, 9:48 PM CDT | Severe Thunderstorm Watch | SPC | Buffalo, Crawford, Jackson, La Crosse, Monroe, Pepin and 4 more | 5 hr |
| May 15, 10:14 PM CDT | Mesoscale Discussion | SPC | Jefferson, Kenosha, Rock, Walworth, Waukesha | 61 min |
| May 16, 2:13 AM CDT | Mesoscale Discussion | SPC | Buffalo, La Crosse, Trempealeau | 92 min |
| May 16, 3:32 PM CDT | Mesoscale Discussion | SPC | Adams, Barron, Buffalo, Burnett, Calumet, Chippewa and 33 more | 88 min |
| May 16, 4:02 PM CDT | Tornado Watch | SPC | Ashland, Barron, Bayfield, Buffalo, Burnett, Chippewa and 24 more | 6 hr |
| May 16, 6:25 PM CDT | Mesoscale Discussion | SPC | Ashland, Barron, Bayfield, Brown, Buffalo, Burnett and 32 more | 65 min |
Nearby
Mesoscale Discussions in Wisconsin, 2017Every mesoscale discussion 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.