Alert archive / Wisconsin / Mesoscale Discussions in 2004

Mesoscale Discussion 588

May 8, 2004Allamakee County, Clayton County, Winneshiek County, Iowa; Fillmore County, Houston County, Winona County, Minnesota; 40 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at May 8, 2004, 12:26 AM CDT for Allamakee County, Clayton County, Winneshiek County, Iowa; Fillmore County, Houston County, Winona County, Minnesota; 40 counties in Wisconsin. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued
May 8, 2004, 12:26 AM CDT (05:26 UTC)
Expired
May 8, 2004, 1:30 AM CDT
In force
64 min
Issued by
the Storm Prediction Center
All 46 counties

Allamakee County, IA, Clayton County, IA, Winneshiek County, IA, Fillmore County, MN, Houston County, MN, Winona County, MN, Adams County, WI, Brown County, WI, Buffalo County, WI, Calumet County, WI, Clark County, WI, Columbia County, WI, Crawford County, WI, Dane County, WI, Dodge County, WI, Eau Claire County, WI, Fond du Lac County, WI, Grant County, WI, Green Lake County, WI, Iowa County, WI, Jackson County, WI, Jefferson County, WI, Juneau County, WI, La Crosse County, WI, Manitowoc County, WI, Marathon County, WI, Marquette County, WI, Menominee County, WI, Monroe County, WI, Oconto County, WI, Outagamie County, WI, Ozaukee County, WI, Pepin County, WI, Portage County, WI, Richland County, WI, Sauk County, WI, Shawano County, WI, Sheboygan County, WI, Trempealeau County, WI, Vernon County, WI, Washington County, WI, Waukesha 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 05:26 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, 5.4 hours before the alert went out and 267 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 2004-05-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2004-05-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 111 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2481 m above ground
0-6 km bulk shear
70 kt
0-1 km storm-relative helicity
111 m²/s²
0-3 km storm-relative helicity
375 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
May 7, 8:20 PM CDTMesoscale DiscussionSPCAllamakee, Benton, Buchanan, Clayton, Delaware, Dubuque and 5 more85 min
May 7, 9:53 PM CDTMesoscale DiscussionSPCBuena Vista, Calhoun, Cerro Gordo, Cherokee, Clay, Crawford and 21 more97 min
May 7, 10:20 PM CDTSevere Thunderstorm WatchSPCBlack Hawk, Boone, Bremer, Buena Vista, Butler, Calhoun and 38 more6 hr
May 8, 12:50 AM CDTSevere Thunderstorm WatchSPCAllamakee, Winneshiek6 hr
May 8, 2:27 AM CDTMesoscale DiscussionSPCBlack Hawk, Boone, Bremer, Buena Vista, Butler, Calhoun and 27 more93 min
May 8, 3:36 AM CDTMesoscale DiscussionSPCAllamakee, Winneshiek54 min
May 8, 5:35 AM CDTMesoscale DiscussionSPCAllamakee, Winneshiek55 min
May 8, 2:27 PM CDTMesoscale DiscussionSPCAdair, Audubon, Black Hawk, Boone, Bremer, Buena Vista and 37 more3 hr
May 8, 3:45 PM CDTSevere Thunderstorm WatchSPCAudubon, Benton, Black Hawk, Boone, Bremer, Buchanan and 38 more5 hr
May 8, 5:45 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Benton, Boone, Buena Vista and 33 more2 hr
May 8, 5:08 PM CDTMesoscale DiscussionSPCCalumet, Columbia, Dane, Dodge, Fond du Lac, Green Lake and 10 more2 hr
May 8, 6:25 PM CDTSevere Thunderstorm WatchSPCAdams, Calumet, Columbia, Crawford, Dane, Dodge and 25 more6 hr

Nearby

Mesoscale Discussions in Wisconsin, 2004Mesoscale Discussions in Iowa, 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.