Alert archive / Wisconsin / Mesoscale Discussions in 2017

Mesoscale Discussion 986

June 11, 2017Iron County, Michigan; 16 counties in Minnesota; 38 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jun 11, 2017, 9:30 AM CDT for Iron County, Michigan; 16 counties in Minnesota; 38 counties in Wisconsin. It was in force for 60 min.

The area

The outline as issued.

The facts

Issued
Jun 11, 2017, 9:30 AM CDT (14:30 UTC)
Expired
Jun 11, 2017, 10:30 AM CDT
In force
60 min
Issued by
the Storm Prediction Center
All 55 counties

Iron County, MI, Anoka County, MN, Chisago County, MN, Dakota County, MN, Dodge County, MN, Fillmore County, MN, Goodhue County, MN, Hennepin County, MN, Houston County, MN, Olmsted County, MN, Ramsey County, MN, Rice County, MN, Scott County, MN, Steele County, MN, Wabasha County, MN, Washington County, MN, Winona County, MN, Adams County, WI, Barron County, WI, Brown County, WI, Buffalo County, WI, Chippewa County, WI, Clark County, WI, Dunn County, WI, Eau Claire County, WI, Florence County, WI, Forest County, WI, Jackson County, WI, Juneau County, WI, La Crosse County, WI, Langlade County, WI, Lincoln County, WI, Marathon County, WI, Marinette County, WI, Menominee County, WI, Monroe County, WI, Oconto County, WI, Oneida County, WI, Outagamie County, WI, Pepin County, WI, Pierce County, WI, Polk County, WI, Portage County, WI, Price County, WI, Rusk County, WI, Saint Croix County, WI, Sawyer County, WI, Shawano County, WI, Taylor County, WI, Trempealeau County, WI, Vilas County, WI, Washburn County, WI, Waupaca County, WI, Waushara County, WI, Wood County, WI

The radar

The La Crosse radar (KARX), 130 km from the middle of the area, began a volume at 14:30 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, 2.5 hours before the alert went out and 204 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.

Skew-T log-pSkew-T log-p diagram, Green Bay/Straub, WI at 12:00Z on 2017-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 364 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Green Bay/Straub, WI at 12:00Z on 2017-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 179 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
364 J/kg
Mixed-layer CIN
-366 J/kg
Mixed-layer LCL
1105 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
179 m²/s²
0-3 km storm-relative helicity
198 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 10, 8:12 PM CDTMesoscale DiscussionSPCBaraga, Gogebic, Houghton, Keweenaw, Ontonagon2 hr
Jun 11, 10:39 AM CDTSevere Thunderstorm WatchSPCDelta, Dickinson, Gogebic, Iron, Menominee5 hr
Jun 11, 12:00 PM CDTMesoscale DiscussionSPCDickinson, Menominee2 hr
Jun 11, 1:30 PM CDTSevere Thunderstorm WatchSPCAlpena, Antrim, Charlevoix, Cheboygan, Chippewa, Emmet and 7 more3 hr
Jun 11, 2:46 PM CDTMesoscale DiscussionSPCAlcona, Alpena, Antrim, Charlevoix, Cheboygan, Chippewa and 11 more119 min
Jun 11, 6:20 PM CDTMesoscale DiscussionSPCIron2 hr
Jun 11, 2:02 AM CDTMesoscale DiscussionSPCBig Stone, Brown, Carver, Chippewa, Kandiyohi, Lac qui Parle and 15 more58 min
Jun 11, 2:37 AM CDTSevere Thunderstorm WatchSPCBig Stone, Brown, Chippewa, Cottonwood, Kandiyohi, Lac qui Parle and 10 more5 hr
Jun 11, 4:00 AM CDTMesoscale DiscussionSPCLincoln, Lyon, Pipestone60 min
Jun 11, 5:51 AM CDTMesoscale DiscussionSPCAnoka, Brown, Carver, Chisago, Dakota, Goodhue and 16 more84 min
Jun 11, 6:28 AM CDTSevere Thunderstorm WatchSPCAnoka, Benton, Blue Earth, Carver, Chisago, Dakota and 26 more6 hr

Nearby

Mesoscale Discussions in Wisconsin, 2017Mesoscale Discussions in Minnesota, 2017Mesoscale Discussions in Michigan, 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.