Alert archive / Minnesota / Mesoscale Discussions in 2008

Mesoscale Discussion 2019

August 3, 200819 counties in Iowa; 35 counties in Minnesota; 8 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Aug 3, 2008, 8:38 PM CDT for 19 counties in Iowa; 35 counties in Minnesota; 8 counties in Wisconsin. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Aug 3, 2008, 8:38 PM CDT (01:38 UTC)
Expired
Aug 3, 2008, 10:45 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 62 counties

Buena Vista County, IA, Cerro Gordo County, IA, Cherokee County, IA, Clay County, IA, Dickinson County, IA, Emmet 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, Plymouth County, IA, Pocahontas County, IA, Sioux County, IA, Winnebago County, IA, Worth County, IA, Anoka County, MN, Blue Earth County, MN, Brown County, MN, Carver County, MN, Cottonwood County, MN, Dakota County, MN, Dodge County, MN, Faribault County, MN, Fillmore County, MN, Freeborn County, MN, Goodhue County, MN, Hennepin County, MN, Jackson County, MN, Le Sueur County, MN, Martin County, MN, McLeod County, MN, Meeker County, MN, Mower County, MN, Nicollet County, MN, Nobles County, MN, Olmsted County, MN, Ramsey County, MN, Redwood County, MN, Renville County, MN, Rice County, MN, Scott County, MN, Sherburne County, MN, Sibley County, MN, Steele County, MN, Wabasha County, MN, Waseca County, MN, Washington County, MN, Watonwan County, MN, Winona County, MN, Wright County, MN, Buffalo County, WI, Dunn County, WI, Eau Claire County, WI, Pepin County, WI, Pierce County, WI, Polk County, WI, Saint Croix County, WI, Trempealeau County, WI

The radar

The Minneapolis radar (KMPX), 111 km from the middle of the area, began a volume at 01:41 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

Minneapolis, MN (KMPX), launched 00:00Z, 1.6 hours before the alert went out and 110 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 2008-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 517 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 00:00Z on 2008-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 211 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
517 J/kg
Mixed-layer CIN
-490 J/kg
Mixed-layer LCL
728 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
211 m²/s²
0-3 km storm-relative helicity
267 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

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
Aug 4, 3:51 PM CDTMesoscale DiscussionSPCBenton, Buchanan, Cedar, Clinton, Delaware, Dubuque and 4 more84 min
Aug 4, 4:48 PM CDTSevere Thunderstorm WatchSPCBenton, Buchanan, Cedar, Clinton, Delaware, Dubuque and 10 more5 hr
Aug 4, 6:45 PM CDTMesoscale DiscussionSPCScott90 min
Aug 3, 10:21 PM CDTTornado WatchSPCAnoka, Blue Earth, Brown, Carver, Chisago, Cottonwood and 31 more5 hr
Aug 4, 1:46 AM CDTMesoscale DiscussionSPCDakota, Goodhue, Wabasha, Washington89 min
Aug 4, 11:31 AM CDTMesoscale DiscussionSPCColumbia, Crawford, Dane, Dodge, Fond du Lac, Green Lake and 7 more119 min

Nearby

Mesoscale Discussions in Minnesota, 2008Mesoscale Discussions in Iowa, 2008Mesoscale Discussions in Wisconsin, 2008Every mesoscale discussion in 2008

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.