Alert archive / Iowa / Mesoscale Discussions in 2008

Mesoscale Discussion 1273

June 8, 20084 states

The Storm Prediction Center issued this mesoscale discussion at Jun 8, 2008, 2:29 AM CDT for 4 states. It was in force for 31 min.

The area

The outline as issued.

The facts

Issued: Jun 8, 2008, 2:29 AM CDT (07:29 UTC)
Expired: Jun 8, 2008, 3:00 AM CDT
In force: 31 min
Issued by: the Storm Prediction Center

All 119 counties

Adair County, IA, Adams County, IA, Allamakee County, IA, Audubon County, IA, Benton 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, Cass County, IA, Cerro Gordo County, IA, Cherokee County, IA, Chickasaw County, IA, Clayton County, IA, Crawford County, IA, Dallas County, IA, Delaware County, IA, Dubuque 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, Iowa County, IA, Jasper County, IA, Jones County, IA, Kossuth County, IA, Linn County, IA, Madison County, IA, Marion County, IA, Marshall County, IA, Mills County, IA, Mitchell County, IA, Monona County, IA, Montgomery County, IA, Palo Alto County, IA, Plymouth County, IA, Pocahontas County, IA, Polk County, IA, Pottawattamie County, IA, Poweshiek County, IA, Sac County, IA, Shelby County, IA, Story County, IA, Tama County, IA, Union County, IA, Warren County, IA, Webster County, IA, Winneshiek County, IA, Woodbury County, IA, Worth County, IA, Wright County, IA, Fillmore County, MN, Houston County, MN, Adams County, NE, Antelope County, NE, Blaine County, NE, Boone County, NE, Buffalo County, NE, Burt County, NE, Butler County, NE, Cass County, NE, Cedar County, NE, Clay County, NE, Colfax County, NE, Cuming County, NE, Custer County, NE, Dakota County, NE, Dawson County, NE, Dixon County, NE, Dodge County, NE, Douglas County, NE, Fillmore County, NE, Garfield County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Holt County, NE, Howard County, NE, Kearney County, NE, Lancaster County, NE, Loup County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Phelps County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Sherman County, NE, Stanton County, NE, Thurston County, NE, Valley County, NE, Washington County, NE, Wayne County, NE, Wheeler County, NE, York County, NE, Crawford County, WI, Grant County, WI, Iowa County, WI, Richland County, WI, Sauk County, WI, Vernon County, WI

The radar

The Omaha radar (KOAX), 107 km from the middle of the area, began a volume at 07:29 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.

Severe Thunderstorm Watch 484Jun 8, 3:05 AM CDT

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 7.5 hours before the alert went out and 323 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2062 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 1233 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 225 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.0

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.

Issued	Product	Office	Counties	Lasted
Jun 7, 7:40 PM CDT	Tornado Watch	SPC	Adair, Allamakee, Audubon, Benton, Black Hawk, Boone and 43 more	7 hr
Jun 7, 10:15 PM CDT	Mesoscale Discussion	SPC	Buena Vista, Cherokee, Clay, Crawford, Dickinson, Emmet and 12 more	90 min
Jun 7, 11:01 PM CDT	Mesoscale Discussion	SPC	Monona, Woodbury	59 min
Jun 7, 11:11 PM CDT	Severe Thunderstorm Watch	SPC	Buena Vista, Cherokee, Clay, Harrison, Ida, Mills and 8 more	7 hr
Jun 8, 3:05 AM CDT	Severe Thunderstorm Watch	SPC	Adair, Adams, Appanoose, Audubon, Benton, Black Hawk and 50 more	6 hr
Jun 8, 6:39 AM CDT	Mesoscale Discussion	SPC	Adair, Adams, Appanoose, Audubon, Benton, Black Hawk and 53 more	66 min
Jun 8, 9:47 AM CDT	Severe Thunderstorm Watch	SPC	Scott	5 hr
Jun 8, 12:28 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Appanoose, Audubon, Cass, Clarke and 26 more	2 hr
Jun 8, 1:21 PM CDT	Tornado Watch	SPC	Adair, Adams, Audubon, Boone, Carroll, Cass and 21 more	7 hr
Jun 8, 1:34 PM CDT	Severe Thunderstorm Watch	SPC	Fremont, Montgomery, Page	7 hr
Jun 8, 3:47 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Boone, Clarke, Dallas, Decatur and 18 more	118 min
Jun 8, 4:32 PM CDT	Mesoscale Discussion	SPC	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more	28 min
Jun 8, 4:43 PM CDT	Tornado Watch	SPC	Appanoose, Benton, Buchanan, Cedar, Clinton, Davis and 18 more	6 hr
Jun 8, 8:43 AM CDT	Mesoscale Discussion	SPC	Green, Jefferson, Kenosha, Milwaukee, Racine, Rock and 2 more	62 min

Nearby

Mesoscale Discussions in Iowa, 2008 Mesoscale Discussions in Nebraska, 2008 Mesoscale Discussions in Wisconsin, 2008 Every 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.