Alert archive / Iowa / Mesoscale Discussions in 2008

Mesoscale Discussion 1329

June 11, 200830 counties in Iowa; 18 counties in Minnesota

The Storm Prediction Center issued this mesoscale discussion at Jun 11, 2008, 8:05 PM CDT for 30 counties in Iowa; 18 counties in Minnesota. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued
Jun 11, 2008, 8:05 PM CDT (01:05 UTC)
Expired
Jun 11, 2008, 10:00 PM CDT
In force
115 min
Issued by
the Storm Prediction Center
All 48 counties

Boone County, IA, Bremer County, IA, Butler County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Clarke County, IA, Dallas County, IA, Floyd County, IA, Franklin County, IA, Grundy County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Howard County, IA, Jasper County, IA, Lucas County, IA, Madison County, IA, Marion County, IA, Marshall County, IA, Mitchell County, IA, Monroe County, IA, Polk County, IA, Story County, IA, Tama County, IA, Union County, IA, Warren County, IA, Webster County, IA, Winnebago County, IA, Worth County, IA, Wright County, IA, Carver County, MN, Dakota County, MN, Dodge County, MN, Faribault County, MN, Fillmore County, MN, Freeborn County, MN, Goodhue County, MN, Hennepin County, MN, Le Sueur County, MN, McLeod County, MN, Mower County, MN, Nicollet County, MN, Olmsted County, MN, Rice County, MN, Scott County, MN, Sibley County, MN, Steele County, MN, Waseca County, MN

The radar

The Minneapolis radar (KMPX), 150 km from the middle of the area, began a volume at 01:07 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, 1.1 hours before the alert went out and 150 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 2008-06-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 47 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 2008-06-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 574 square meters per square second.19395878Sfc1 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
47 J/kg
Mixed-layer CIN
-333 J/kg
Mixed-layer LCL
523 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
574 m²/s²
0-3 km storm-relative helicity
740 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.0

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 11, 8:39 PM CDTTornado WatchSPCAdair, Adams, Appanoose, Black Hawk, Boone, Bremer and 39 more5 hr
Jun 11, 8:57 PM CDTMesoscale DiscussionSPCAudubon, Carroll, Cass, Crawford, Fremont, Harrison and 6 more93 min
Jun 11, 9:46 PM CDTTornado WatchSPCFremont, Mills, Montgomery, Page5 hr
Jun 11, 9:58 PM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Black Hawk, Boone, Bremer and 36 more92 min
Jun 11, 11:41 PM CDTMesoscale DiscussionSPCAdair, Adams, Allamakee, Appanoose, Benton, Black Hawk and 43 more2 hr
Jun 12, 3:56 AM CDTMesoscale DiscussionSPCAppanoose, Lucas, Marion, Monroe, Wayne94 min
Jun 12, 12:37 PM CDTMesoscale DiscussionSPCAppanoose, Benton, Cedar, Clayton, Clinton, Davis and 18 more113 min
Jun 12, 1:04 PM CDTTornado WatchSPCCedar, Clinton, Delaware, Des Moines, Dubuque, Henry and 13 more7 hr
Jun 12, 3:06 PM CDTTornado WatchSPCAppanoose, Davis, Mahaska, Monroe, Wapello, Wayne7 hr
Jun 12, 3:45 PM CDTMesoscale DiscussionSPCCedar, Clinton, Des Moines, Jackson, Jones, Louisa and 2 more90 min
Jun 12, 3:52 PM CDTMesoscale DiscussionSPCAllamakee, Appanoose, Benton, Buchanan, Cedar, Clarke and 31 more113 min
Jun 12, 6:49 PM CDTMesoscale DiscussionSPCCedar, Clinton, Des Moines, Dubuque, Henry, Jackson and 5 more86 min
Jun 12, 2:51 PM CDTMesoscale DiscussionSPCBecker, Big Stone, Clay, Grant, Kittson, Lac qui Parle and 10 more114 min
Jun 12, 3:33 PM CDTSevere Thunderstorm WatchSPCBecker, Beltrami, Big Stone, Chippewa, Clay, Clearwater and 22 more6 hr

Nearby

Mesoscale Discussions in Iowa, 2008Mesoscale Discussions in Minnesota, 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.