Alert archive / Wisconsin / Mesoscale Discussions in 2017

Mesoscale Discussion 990

June 11, 2017Iron County, Michigan; 9 counties in Minnesota; 28 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jun 11, 2017, 6:20 PM CDT for Iron County, Michigan; 9 counties in Minnesota; 28 counties in Wisconsin. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jun 11, 2017, 6:20 PM CDT (23:20 UTC)
Expired
Jun 11, 2017, 8:45 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
40%
All 38 counties

Iron County, MI, Chisago County, MN, Dakota County, MN, Dodge County, MN, Goodhue County, MN, Olmsted County, MN, Ramsey County, MN, Wabasha County, MN, Washington County, MN, Winona County, MN, Barron County, WI, Buffalo County, WI, Burnett County, WI, Chippewa County, WI, Clark County, WI, Dunn County, WI, Eau Claire County, WI, Florence County, WI, Forest County, WI, Jackson County, WI, La Crosse County, WI, Langlade County, WI, Lincoln County, WI, Marathon County, WI, Oneida 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, Taylor County, WI, Trempealeau County, WI, Vilas County, WI, Washburn County, WI, Wood County, WI

The radar

The La Crosse radar (KARX), 129 km from the middle of the area, began a volume at 23:22 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

Minneapolis, MN (KMPX), launched 12:00Z, 11.3 hours before the alert went out and 213 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, Minneapolis, MN at 12:00Z on 2017-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Minneapolis, MN at 12:00Z on 2017-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 294 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2213 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
294 m²/s²
0-3 km storm-relative helicity
318 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

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, 9:30 AM CDTMesoscale DiscussionSPCIron60 min
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, 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.