Alert archive / Wisconsin / Mesoscale Discussions in 2004

Mesoscale Discussion 2036

August 18, 20049 counties in Iowa; 25 counties in Michigan; 33 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Aug 18, 2004, 3:46 PM CDT for 9 counties in Iowa; 25 counties in Michigan; 33 counties in Wisconsin. It was in force for 59 min.

The area

The outline as issued.

The facts

Issued
Aug 18, 2004, 3:46 PM CDT (20:46 UTC)
Expired
Aug 18, 2004, 4:45 PM CDT
In force
59 min
Issued by
the Storm Prediction Center
All 67 counties

Allamakee County, IA, Bremer County, IA, Butler County, IA, Chickasaw County, IA, Clayton County, IA, Fayette County, IA, Floyd County, IA, Howard County, IA, Winneshiek County, IA, Alger County, MI, Antrim County, MI, Benzie County, MI, Charlevoix County, MI, Cheboygan County, MI, Chippewa County, MI, Delta County, MI, Dickinson County, MI, Emmet County, MI, Grand Traverse County, MI, Kalkaska County, MI, Lake County, MI, Leelanau County, MI, Luce County, MI, Mackinac County, MI, Manistee County, MI, Marquette County, MI, Mason County, MI, Menominee County, MI, Missaukee County, MI, Muskegon County, MI, Oceana County, MI, Otsego County, MI, Schoolcraft County, MI, Wexford County, MI, Adams County, WI, Brown County, WI, Calumet County, WI, Columbia County, WI, Crawford County, WI, Dane County, WI, Dodge County, WI, Door County, WI, Fond du Lac County, WI, Grant County, WI, Green Lake County, WI, Iowa County, WI, Jefferson County, WI, Juneau County, WI, Kewaunee County, WI, Manitowoc County, WI, Marinette County, WI, Marquette County, WI, Menominee County, WI, Milwaukee County, WI, Oconto County, WI, Outagamie County, WI, Ozaukee County, WI, Richland County, WI, Sauk County, WI, Shawano County, WI, Sheboygan County, WI, Vernon County, WI, Washington County, WI, Waukesha County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI

The radar

The Green Bay radar (KGRB), 42 km from the middle of the area, began a volume at 20:49 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

Green Bay/Straub, WI (KGRB), launched 12:00Z, 8.8 hours before the alert went out and 43 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, Green Bay/Straub, WI at 12:00Z on 2004-08-18Temperature 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, Green Bay/Straub, WI at 12:00Z on 2004-08-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 72 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
993 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
72 m²/s²
0-3 km storm-relative helicity
131 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 18, 12:27 PM CDTMesoscale DiscussionSPCAllamakee, Howard, Winneshiek63 min
Aug 18, 1:10 PM CDTSevere Thunderstorm WatchSPCAllamakee, Bremer, Chickasaw, Clayton, Fayette, Floyd and 2 more7 hr
Aug 18, 4:17 PM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Cass, Clarke, Dallas and 31 more118 min
Aug 18, 4:50 PM CDTSevere Thunderstorm WatchSPCAppanoose, Davis, Decatur, Henry, Jefferson, Lee and 7 more6 hr
Aug 18, 5:17 PM CDTMesoscale DiscussionSPCLee88 min
Aug 18, 5:35 PM CDTSevere Thunderstorm WatchSPCDes Moines5 hr
Aug 18, 5:52 PM CDTMesoscale DiscussionSPCClayton, Fayette113 min
Aug 17, 7:48 PM CDTMesoscale DiscussionSPCBerrien, Branch, Calhoun, Cass, Hillsdale, Jackson and 8 more117 min
Aug 18, 3:03 PM CDTMesoscale DiscussionSPCMonroe, Wayne57 min
Aug 18, 4:30 PM CDTSevere Thunderstorm WatchSPCAlcona, Alpena, Antrim, Arenac, Benzie, Charlevoix and 23 more6 hr
Aug 18, 6:41 PM CDTMesoscale DiscussionSPCAlcona, Alpena, Antrim, Arenac, Bay, Cheboygan and 23 more94 min

Nearby

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