Alert archive / Wisconsin / Mesoscale Discussions in 2014

Mesoscale Discussion 1055

June 18, 20145 counties in Illinois; 16 counties in Michigan; 36 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jun 18, 2014, 12:59 AM CDT for 5 counties in Illinois; 16 counties in Michigan; 36 counties in Wisconsin. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued
Jun 18, 2014, 12:59 AM CDT (05:59 UTC)
Expired
Jun 18, 2014, 2:30 AM CDT
In force
91 min
Issued by
the Storm Prediction Center
All 57 counties

Boone County, IL, Lake County, IL, McHenry County, IL, Stephenson County, IL, Winnebago County, IL, Allegan County, MI, Barry County, MI, Ionia County, MI, Isabella County, MI, Kent County, MI, Lake County, MI, Manistee County, MI, Mason County, MI, Mecosta County, MI, Montcalm County, MI, Muskegon County, MI, Newaygo County, MI, Oceana County, MI, Osceola County, MI, Ottawa County, MI, Van Buren County, MI, Adams County, WI, Brown County, WI, Calumet County, WI, Columbia County, WI, Dane County, WI, Dodge County, WI, Fond du Lac County, WI, Grant County, WI, Green County, WI, Green Lake County, WI, Iowa County, WI, Jackson County, WI, Jefferson County, WI, Juneau County, WI, Kenosha County, WI, Lafayette County, WI, Manitowoc County, WI, Marquette County, WI, Milwaukee County, WI, Monroe County, WI, Outagamie County, WI, Ozaukee County, WI, Portage County, WI, Racine County, WI, Richland County, WI, Rock County, WI, Sauk County, WI, Sheboygan County, WI, Vernon County, WI, Walworth County, WI, Washington County, WI, Waukesha County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI, Wood County, WI

The radar

The Milwaukee radar (KMKX), 69 km from the middle of the area, began a volume at 05:58 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 00:00Z, 6.0 hours before the alert went out and 114 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 00:00Z on 2014-06-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1626 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 00:00Z on 2014-06-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 15 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
1626 J/kg
Mixed-layer CIN
-32 J/kg
Mixed-layer LCL
1087 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
15 m²/s²
0-3 km storm-relative helicity
-4 m²/s²
Significant tornado parameter
-0.2
Supercell composite
-1.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 17, 9:38 PM CDTMesoscale DiscussionSPCBoone, Carroll, Cook, DeKalb, DuPage, Jo Daviess and 8 more97 min
Jun 17, 10:13 PM CDTSevere Thunderstorm WatchSPCBoone, Carroll, Cook, DeKalb, DuPage, Jo Daviess and 10 more6 hr
Jun 18, 5:36 AM CDTMesoscale DiscussionSPCJo Daviess54 min
Jun 18, 2:56 PM CDTMesoscale DiscussionSPCChampaign, Clark, Coles, Crawford, Cumberland, Douglas and 7 more94 min
Jun 18, 6:06 PM CDTMesoscale DiscussionSPCBoone, Carroll, DeKalb, DuPage, Kane, Lee and 3 more54 min
Jun 17, 10:36 PM CDTMesoscale DiscussionSPCIron84 min
Jun 18, 10:32 AM CDTMesoscale DiscussionSPCAllegan, Barry, Berrien, Branch, Calhoun, Cass and 24 more118 min
Jun 18, 12:55 PM CDTSevere Thunderstorm WatchSPCBarry, Branch, Calhoun, Cass, Clinton, Eaton and 16 more6 hr
Jun 18, 3:43 PM CDTMesoscale DiscussionSPCLenawee, Macomb, Monroe, Oakland, Saint Clair, Wayne2 hr
Jun 17, 7:44 PM CDTMesoscale DiscussionSPCBuffalo, Crawford, Jackson, La Crosse, Monroe, Pepin and 4 more2 hr
Jun 18, 3:07 AM CDTMesoscale DiscussionSPCCrawford, Grant, Iowa, Juneau, La Crosse, Lafayette and 4 more53 min
Jun 18, 3:47 AM CDTSevere Thunderstorm WatchSPCBuffalo, Crawford, Grant, Jackson, La Crosse, Monroe and 3 more4 hr

Nearby

Mesoscale Discussions in Wisconsin, 2014Mesoscale Discussions in Michigan, 2014Mesoscale Discussions in Illinois, 2014Every mesoscale discussion in 2014

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.