Alert archive / Wisconsin / Mesoscale Discussions in 2018

Mesoscale Discussion 967

June 30, 20184 states

The Storm Prediction Center issued this mesoscale discussion at Jun 30, 2018, 8:05 PM CDT for 4 states. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued
Jun 30, 2018, 8:05 PM CDT (01:05 UTC)
Expired
Jun 30, 2018, 9:30 PM CDT
In force
85 min
Issued by
the Storm Prediction Center
All 54 counties

Allamakee County, IA, Chickasaw County, IA, Clayton County, IA, Fayette County, IA, Winneshiek County, IA, Alger County, MI, Delta County, MI, Dickinson County, MI, Gogebic County, MI, Iron County, MI, Menominee County, MI, Houston County, MN, Winona County, MN, Adams County, WI, Brown County, WI, Calumet County, WI, Clark County, WI, Columbia County, WI, Crawford County, WI, Dane 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, Juneau County, WI, La Crosse County, WI, Lafayette County, WI, Langlade County, WI, Lincoln County, WI, Marathon County, WI, Marinette County, WI, Marquette County, WI, Menominee County, WI, Monroe County, WI, Oconto County, WI, Oneida County, WI, Outagamie County, WI, Portage County, WI, Price County, WI, Richland County, WI, Sauk County, WI, Shawano County, WI, Taylor County, WI, Trempealeau County, WI, Vernon County, WI, Vilas County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI, Wood County, WI

The radar

The La Crosse radar (KARX), 119 km from the middle of the area, began a volume at 01:09 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 nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 1.1 hours before the alert went out and 139 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 2018-07-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3137 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 2018-07-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -14 square meters per square second.1939Sfc1 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
3137 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
1358 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
-14 m²/s²
0-3 km storm-relative helicity
-12 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 30, 7:15 PM CDTMesoscale DiscussionSPCBenton, Cedar, Clinton, Iowa, Jackson, Jasper and 11 more90 min
Jun 30, 8:55 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Cass, Fremont, Harrison and 8 more95 min
Jul 1, 12:48 AM CDTMesoscale DiscussionSPCHarrison, Mills, Pottawattamie, Shelby117 min
Jul 1, 11:37 AM CDTMesoscale DiscussionSPCDelta, Dickinson, Iron, Menominee83 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
Jul 1, 6:51 PM CDTMesoscale DiscussionSPCAllegan, Berrien, Cass, Van Buren114 min
Jul 1, 5:40 PM CDTMesoscale DiscussionSPCClay, Kittson, Marshall, Norman, Pennington, Polk and 2 more3 hr

Nearby

Mesoscale Discussions in Wisconsin, 2018Mesoscale Discussions in Michigan, 2018Mesoscale Discussions in Iowa, 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.