Alert archive / Minnesota / Mesoscale Discussions in 2011

Mesoscale Discussion 395

April 10, 201120 counties in Iowa; 25 counties in Minnesota; 10 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Apr 10, 2011, 1:26 AM CDT for 20 counties in Iowa; 25 counties in Minnesota; 10 counties in Wisconsin. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued
Apr 10, 2011, 1:26 AM CDT (06:26 UTC)
Expired
Apr 10, 2011, 2:30 AM CDT
In force
64 min
Issued by
the Storm Prediction Center
All 55 counties

Allamakee County, IA, Buena Vista County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Clay County, IA, Dickinson County, IA, Emmet County, IA, Floyd County, IA, Hancock County, IA, Howard County, IA, Humboldt County, IA, Kossuth County, IA, Mitchell County, IA, O'Brien County, IA, Osceola County, IA, Palo Alto County, IA, Pocahontas County, IA, Winnebago County, IA, Winneshiek County, IA, Worth County, IA, Blue Earth County, MN, Brown County, MN, Cottonwood County, MN, Dakota County, MN, Dodge County, MN, Faribault County, MN, Fillmore County, MN, Freeborn County, MN, Goodhue County, MN, Houston County, MN, Jackson County, MN, Le Sueur County, MN, Martin County, MN, Mower County, MN, Nicollet County, MN, Nobles County, MN, Olmsted County, MN, Rice County, MN, Scott County, MN, Sibley County, MN, Steele County, MN, Wabasha County, MN, Waseca County, MN, Watonwan County, MN, Winona County, MN, Buffalo County, WI, Crawford County, WI, Eau Claire County, WI, Jackson County, WI, La Crosse County, WI, Monroe County, WI, Pepin County, WI, Pierce County, WI, Trempealeau County, WI, Vernon County, WI

The radar

The Minneapolis radar (KMPX), 132 km from the middle of the area, began a volume at 06:28 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 00:00Z, 6.4 hours before the alert went out and 133 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 00:00Z on 2011-04-10Temperature 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 00:00Z on 2011-04-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 355 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
612 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
355 m²/s²
0-3 km storm-relative helicity
550 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.2

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
Apr 9, 7:42 PM CDTSevere Thunderstorm WatchSPCAllamakee, Chickasaw, Floyd, Howard, Mitchell, Winneshiek7 hr
Apr 9, 9:06 PM CDTMesoscale DiscussionSPCAudubon, Buena Vista, Calhoun, Carroll, Cass, Cherokee and 31 more54 min
Apr 9, 10:43 PM CDTMesoscale DiscussionSPCAllamakee, Black Hawk, Bremer, Buena Vista, Butler, Cerro Gordo and 25 more62 min
Apr 9, 11:01 PM CDTTornado WatchSPCAllamakee, Bremer, Buena Vista, Butler, Cerro Gordo, Cherokee and 19 more5 hr
Apr 10, 1:30 PM CDTMesoscale DiscussionSPCAllamakee, Buchanan, Clayton, Delaware, Dubuque, Fayette and 5 more2 hr
Apr 10, 3:19 PM CDTTornado Watch PDSSPCAllamakee, Clayton, Fayette, Howard, Winneshiek7 hr
Apr 10, 5:03 PM CDTMesoscale DiscussionSPCCedar, Clinton, Davis, Delaware, Des Moines, Dubuque and 12 more57 min
Apr 10, 6:05 PM CDTTornado WatchSPCClinton, Des Moines, Jackson, Lee, Louisa, Muscatine and 1 more7 hr
Apr 9, 7:47 PM CDTSevere Thunderstorm WatchSPCCottonwood, Jackson, Lincoln, Lyon, Murray, Nobles and 2 more3 hr
Apr 10, 6:02 PM CDTMesoscale DiscussionSPCAdams, Brown, Calumet, Columbia, Dane, Dodge and 26 more88 min

Nearby

Mesoscale Discussions in Minnesota, 2011Mesoscale Discussions in Iowa, 2011Mesoscale Discussions in Wisconsin, 2011Every mesoscale discussion in 2011

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.