Alert archive / Wisconsin / Mesoscale Discussions in 2018

Mesoscale Discussion 973

July 1, 20185 counties in Illinois; 4 counties in Michigan; 50 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jul 1, 2018, 11:37 AM CDT for 5 counties in Illinois; 4 counties in Michigan; 50 counties in Wisconsin. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued
Jul 1, 2018, 11:37 AM CDT (16:37 UTC)
Expired
Jul 1, 2018, 1:00 PM CDT
In force
83 min
Issued by
the Storm Prediction Center
Chance of a watch
80%
All 59 counties

Boone County, IL, Jo Daviess County, IL, McHenry County, IL, Stephenson County, IL, Winnebago County, IL, Delta County, MI, Dickinson County, MI, Iron County, MI, Menominee County, MI, Adams County, WI, Brown County, WI, Calumet County, WI, Columbia County, WI, Crawford County, WI, Dane County, WI, Dodge County, WI, Door County, WI, Florence County, WI, Fond du Lac County, WI, Forest 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, Kewaunee County, WI, Lafayette County, WI, Langlade County, WI, Lincoln County, WI, Manitowoc County, WI, Marathon County, WI, Marinette County, WI, Marquette County, WI, Menominee County, WI, Milwaukee County, WI, Monroe County, WI, Oconto County, WI, Oneida County, WI, Outagamie County, WI, Ozaukee County, WI, Portage County, WI, Racine County, WI, Richland County, WI, Rock County, WI, Sauk County, WI, Shawano County, WI, Sheboygan County, WI, Vernon County, WI, Vilas 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 Green Bay radar (KGRB), 75 km from the middle of the area, began a volume at 16:38 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, 4.6 hours before the alert went out and 75 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 2018-07-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 10 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 2018-07-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 86 square meters per square second.193958Sfc1 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
10 J/kg
Mixed-layer CIN
-259 J/kg
Mixed-layer LCL
1272 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
86 m²/s²
0-3 km storm-relative helicity
152 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
Jul 1, 12:23 PM CDTMesoscale DiscussionSPCAdams, Bond, Boone, Brown, Bureau, Carroll and 56 more97 min
Jul 1, 12:58 PM CDTSevere Thunderstorm WatchSPCBond, Boone, Bureau, Cass, Champaign, Christian and 49 more7 hr
Jul 1, 3:37 PM CDTMesoscale DiscussionSPCBond, Boone, Cass, Champaign, Christian, Clark and 46 more83 min
Jul 1, 6:51 PM CDTMesoscale DiscussionSPCBond, Champaign, Christian, Clark, Clay, Clinton and 22 more114 min
Jun 30, 8:05 PM CDTMesoscale DiscussionSPCAlger, Delta, Dickinson, Gogebic, Iron, Menominee85 min
Jul 1, 12:04 PM CDTTornado WatchSPCAlger, Delta, Dickinson, Iron, Luce, Marquette and 2 more6 hr
Jul 1, 1:37 PM CDTMesoscale DiscussionSPCAlger, Baraga, Delta, Dickinson, Iron, Luce and 3 more53 min
Jul 1, 3:18 PM CDTMesoscale DiscussionSPCDelta, Luce, Mackinac, Menominee, Schoolcraft87 min
Jul 1, 5:05 PM CDTMesoscale DiscussionSPCAntrim, Benzie, Charlevoix, Cheboygan, Chippewa, Clare and 16 more2 hr
Jul 1, 5:35 PM CDTSevere Thunderstorm WatchSPCAllegan, Antrim, Barry, Benzie, Charlevoix, Cheboygan and 22 more3 hr

Nearby

Mesoscale Discussions in Wisconsin, 2018Mesoscale Discussions in Illinois, 2018Mesoscale Discussions in Michigan, 2018Every mesoscale discussion in 2018

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.