Alert archive / Wisconsin / Mesoscale Discussions in 2019

Mesoscale Discussion 1649

August 5, 201928 counties in Iowa; 10 counties in Minnesota; 32 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Aug 5, 2019, 6:14 PM CDT for 28 counties in Iowa; 10 counties in Minnesota; 32 counties in Wisconsin. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Aug 5, 2019, 6:14 PM CDT (23:14 UTC)
Expired
Aug 5, 2019, 8:15 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 70 counties

Allamakee County, IA, Benton County, IA, Black Hawk County, IA, Bremer County, IA, Buchanan County, IA, Butler County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Clayton County, IA, Delaware County, IA, Dubuque County, IA, Fayette County, IA, Floyd County, IA, Franklin County, IA, Grundy County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Howard County, IA, Humboldt County, IA, Kossuth County, IA, Marshall County, IA, Mitchell County, IA, Tama County, IA, Winnebago County, IA, Winneshiek County, IA, Worth County, IA, Wright County, IA, Dodge County, MN, Faribault County, MN, Fillmore County, MN, Freeborn County, MN, Houston County, MN, Mower County, MN, Olmsted County, MN, Steele County, MN, Wabasha County, MN, Winona County, MN, Adams County, WI, Buffalo County, WI, Calumet County, WI, Clark County, WI, Columbia County, WI, Crawford County, WI, Dane County, WI, Dodge County, WI, Fond du Lac County, WI, Grant County, WI, Green Lake County, WI, Iowa County, WI, Jackson County, WI, Jefferson County, WI, Juneau County, WI, La Crosse County, WI, Lafayette County, WI, Marquette County, WI, Monroe County, WI, Outagamie County, WI, Ozaukee County, WI, Portage County, WI, Richland County, WI, Sauk County, WI, Sheboygan County, WI, Trempealeau County, WI, Vernon County, WI, Washington County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI, Wood County, WI

The radar

The La Crosse radar (KARX), 55 km from the middle of the area, began a volume at 23:13 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

Minneapolis, MN (KMPX), launched 12:00Z, 11.2 hours before the alert went out and 245 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 2019-08-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1431 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, Minneapolis, MN at 12:00Z on 2019-08-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 50 square meters per square second.1939587897Sfc1 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
1431 J/kg
Mixed-layer CIN
-115 J/kg
Mixed-layer LCL
1018 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
50 m²/s²
0-3 km storm-relative helicity
80 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

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
Aug 5, 1:18 PM CDTMesoscale DiscussionSPCHoward, Kossuth, Mitchell, Winnebago, Worth117 min
Aug 5, 1:45 PM CDTSevere Thunderstorm WatchSPCAllamakee, Chickasaw, Floyd, Howard, Mitchell, Winneshiek8 hr
Aug 5, 2:43 PM CDTMesoscale DiscussionSPCBoone, Buena Vista, Butler, Calhoun, Carroll, Cerro Gordo and 19 more2 hr
Aug 5, 3:16 PM CDTSevere Thunderstorm WatchSPCBlack Hawk, Boone, Bremer, Butler, Calhoun, Carroll and 21 more8 hr
Aug 4, 11:02 PM CDTMesoscale DiscussionSPCClay, Norman, Polk88 min
Aug 4, 11:29 PM CDTSevere Thunderstorm WatchSPCClay, Norman, Polk, Wilkin8 hr
Aug 5, 3:08 AM CDTMesoscale DiscussionSPCClay, Norman, Polk, Wilkin97 min
Aug 5, 5:24 AM CDTMesoscale DiscussionSPCClay, Wilkin96 min
Aug 5, 6:50 AM CDTSevere Thunderstorm WatchSPCAitkin, Anoka, Benton, Carlton, Carver, Cass and 29 more6 hr
Aug 5, 9:34 AM CDTMesoscale DiscussionSPCPine116 min
Aug 5, 11:49 AM CDTMesoscale DiscussionSPCAshland, Barron, Bayfield, Burnett, Chippewa, Clark and 20 more116 min

Nearby

Mesoscale Discussions in Wisconsin, 2019Mesoscale Discussions in Iowa, 2019Mesoscale Discussions in Minnesota, 2019Every mesoscale discussion in 2019

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.