Alert archive / Iowa / Mesoscale Discussions in 2004

Mesoscale Discussion 1142

June 8, 20044 states

The Storm Prediction Center issued this mesoscale discussion at Jun 8, 2004, 3:29 PM CDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jun 8, 2004, 3:29 PM CDT (20:29 UTC)
Expired
Jun 8, 2004, 5:30 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 115 counties

Allamakee County, IA, Audubon County, IA, Black Hawk County, IA, Boone County, IA, Bremer County, IA, Buchanan County, IA, Buena Vista County, IA, Butler County, IA, Calhoun County, IA, Carroll County, IA, Cerro Gordo County, IA, Cherokee County, IA, Chickasaw County, IA, Clay County, IA, Clayton County, IA, Crawford County, IA, Dallas County, IA, Delaware County, IA, Dickinson County, IA, Dubuque County, IA, Emmet County, IA, Fayette County, IA, Floyd County, IA, Franklin County, IA, Greene County, IA, Grundy County, IA, Guthrie County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Harrison County, IA, Howard County, IA, Humboldt County, IA, Ida County, IA, Kossuth County, IA, Marshall County, IA, Mitchell County, IA, Monona County, IA, O'Brien County, IA, Palo Alto County, IA, Plymouth County, IA, Pocahontas County, IA, Sac County, IA, Shelby County, IA, Story County, IA, Tama County, IA, Webster County, IA, Winnebago County, IA, Winneshiek County, IA, Woodbury County, IA, Worth County, IA, Wright County, IA, Blue Earth County, MN, Dodge County, MN, Faribault County, MN, Fillmore County, MN, Freeborn County, MN, Goodhue County, MN, Houston County, MN, Le Sueur County, MN, Martin County, MN, Mower County, MN, Olmsted County, MN, Rice County, MN, Steele County, MN, Wabasha County, MN, Waseca County, MN, Winona County, MN, Burt County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Pierce County, NE, Stanton County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE, Adams County, WI, Brown County, WI, Buffalo County, WI, Calumet County, WI, Columbia County, WI, Crawford County, WI, Dane County, WI, Dodge County, WI, Fond du Lac 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, La Crosse County, WI, Lafayette County, WI, Marquette County, WI, Milwaukee County, WI, Monroe County, WI, Outagamie County, WI, Portage County, WI, Richland County, WI, Rock County, WI, Sauk County, WI, Trempealeau County, WI, Vernon 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 Des Moines radar (KDMX), 94 km from the middle of the area, began a volume at 20:34 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 12:00Z, 8.5 hours before the alert went out and 256 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 2004-06-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 490 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 2004-06-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 37 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
490 J/kg
Mixed-layer CIN
-265 J/kg
Mixed-layer LCL
964 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
37 m²/s²
0-3 km storm-relative helicity
99 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
Jun 8, 5:00 PM CDTSevere Thunderstorm WatchSPCBuena Vista, Calhoun, Carroll, Cerro Gordo, Cherokee, Clay and 21 more6 hr
Jun 8, 6:44 PM CDTMesoscale DiscussionSPCBoone, Buena Vista, Butler, Calhoun, Carroll, Cerro Gordo and 16 more2 hr
Jun 7, 7:08 PM CDTMesoscale DiscussionSPCAitkin, Anoka, Benton, Carlton, Carver, Chisago and 14 more2 hr
Jun 7, 9:46 PM CDTMesoscale DiscussionSPCChippewa, Kandiyohi, Lac qui Parle, Lincoln, Lyon, McLeod and 8 more119 min
Jun 7, 10:25 PM CDTSevere Thunderstorm WatchSPCAitkin, Benton, Big Stone, Carlton, Chippewa, Cook and 21 more6 hr
Jun 8, 12:42 AM CDTMesoscale DiscussionSPCAnoka, Brown, Carver, Chisago, Dakota, Dodge and 17 more63 min
Jun 8, 12:55 AM CDTSevere Thunderstorm WatchSPCAnoka, Carver, Chisago, Dakota, Goodhue, Hennepin and 10 more3 hr
Jun 8, 2:08 AM CDTMesoscale DiscussionSPCAitkin, Benton, Carlton, Chippewa, Cook, Crow Wing and 14 more67 min
Jun 8, 3:02 AM CDTMesoscale DiscussionSPCAitkin, Anoka, Benton, Carlton, Carver, Chisago and 23 more58 min
Jun 8, 2:24 PM CDTMesoscale DiscussionSPCArthur, Blaine, Boone, Buffalo, Chase, Custer and 21 more2 hr
Jun 8, 3:00 PM CDTTornado WatchSPCAdams, Arthur, Buffalo, Chase, Custer, Dawson and 22 more6 hr
Jun 8, 5:24 PM CDTMesoscale DiscussionSPCBuffalo, Chase, Custer, Dawson, Frontier, Furnas and 10 more2 hr
Jun 8, 6:02 PM CDTMesoscale DiscussionSPCChase, Dundy, Perkins118 min

Nearby

Mesoscale Discussions in Iowa, 2004Mesoscale Discussions in Wisconsin, 2004Mesoscale Discussions in Minnesota, 2004Every mesoscale discussion in 2004

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.