Alert archive / Iowa / Mesoscale Discussions in 2005

Mesoscale Discussion 1952

August 9, 200522 counties in Iowa; 4 counties in Minnesota; 16 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Aug 9, 2005, 5:26 PM CDT for 22 counties in Iowa; 4 counties in Minnesota; 16 counties in Wisconsin. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued
Aug 9, 2005, 5:26 PM CDT (22:26 UTC)
Expired
Aug 9, 2005, 7:00 PM CDT
In force
94 min
Issued by
the Storm Prediction Center
All 42 counties

Allamakee County, IA, Bremer County, IA, Buena Vista County, IA, Butler County, IA, Calhoun County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Floyd County, IA, Franklin County, IA, Greene County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Howard County, IA, Humboldt County, IA, Mitchell County, IA, Pocahontas County, IA, Sac County, IA, Webster County, IA, Winneshiek County, IA, Worth County, IA, Wright County, IA, Fillmore County, MN, Houston County, MN, Mower County, MN, Winona County, MN, Adams County, WI, Brown County, WI, Crawford County, WI, Jackson County, WI, Juneau County, WI, La Crosse County, WI, Marquette County, WI, Monroe County, WI, Outagamie County, WI, Portage County, WI, Shawano County, WI, Vernon County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI, Wood County, WI

The radar

The La Crosse radar (KARX), 77 km from the middle of the area, began a volume at 22:28 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 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, 10.4 hours before the alert went out and 212 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 2005-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2206 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 2005-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 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
2206 J/kg
Mixed-layer CIN
-140 J/kg
Mixed-layer LCL
1490 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
-12 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
Aug 9, 11:25 AM CDTMesoscale DiscussionSPCBuena Vista, Cherokee, Clay, Dickinson, Emmet, Ida and 9 more95 min
Aug 9, 2:20 PM CDTSevere Thunderstorm WatchSPCBuena Vista, Calhoun, Carroll, Cherokee, Clay, Crawford and 20 more7 hr
Aug 9, 5:55 PM CDTSevere Thunderstorm WatchSPCAllamakee, Audubon, Black Hawk, Boone, Bremer, Butler and 22 more4 hr
Aug 8, 11:08 PM CDTMesoscale DiscussionSPCBecker, Clay, Wilkin97 min
Aug 9, 12:50 AM CDTSevere Thunderstorm WatchSPCAitkin, Benton, Carlton, Crow Wing, Douglas, Grant and 11 more6 hr
Aug 9, 2:36 AM CDTMesoscale DiscussionSPCAitkin, Benton, Carlton, Crow Wing, Douglas, Grant and 10 more114 min
Aug 9, 5:05 AM CDTMesoscale DiscussionSPCCarlton, Pine115 min
Aug 9, 11:51 AM CDTMesoscale DiscussionSPCAnoka, Benton, Carver, Chisago, Hennepin, Isanti and 11 more84 min
Aug 9, 1:45 PM CDTSevere Thunderstorm WatchSPCDodge, Fillmore, Goodhue, Houston, Mower, Olmsted and 3 more7 hr
Aug 9, 5:45 AM CDTSevere Thunderstorm WatchSPCAshland, Bayfield, Burnett, Douglas, Florence, Forest and 6 more5 hr

Nearby

Mesoscale Discussions in Iowa, 2005Mesoscale Discussions in Wisconsin, 2005Mesoscale Discussions in Minnesota, 2005Every mesoscale discussion in 2005

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.