Alert archive / Michigan / Mesoscale Discussions in 2004

Mesoscale Discussion 598

May 8, 200422 counties in Michigan; 16 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at May 8, 2004, 6:08 PM EDT for 22 counties in Michigan; 16 counties in Wisconsin. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 8, 2004, 6:08 PM EDT (22:08 UTC)
Expired
May 8, 2004, 8:15 PM EDT
In force
2 hr
Issued by
the Storm Prediction Center
All 38 counties

Bay County, MI, Clinton County, MI, Eaton County, MI, Genesee County, MI, Gratiot County, MI, Ingham County, MI, Ionia County, MI, Isabella County, MI, Kent County, MI, Lake County, MI, Lapeer County, MI, Mason County, MI, Mecosta County, MI, Midland County, MI, Montcalm County, MI, Muskegon County, MI, Newaygo County, MI, Oceana County, MI, Osceola County, MI, Ottawa County, MI, Saginaw County, MI, Shiawassee County, MI, Calumet County, WI, Columbia County, WI, Dane County, WI, Dodge County, WI, Fond du Lac County, WI, Green Lake County, WI, Jefferson County, WI, Manitowoc County, WI, Marquette County, WI, Milwaukee County, WI, Ozaukee County, WI, Sauk County, WI, Sheboygan County, WI, Washington County, WI, Waukesha County, WI, Winnebago County, WI

The radar

The Milwaukee radar (KMKX), 116 km from the middle of the area, began a volume at 22:10 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, 10.1 hours before the alert went out and 140 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 2004-05-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 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 2004-05-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 345 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
532 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
345 m²/s²
0-3 km storm-relative helicity
418 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 8, 5:00 PM EDTMesoscale DiscussionSPCBerrien, Branch, Cass, Saint Joseph3 hr
May 8, 6:20 PM EDTSevere Thunderstorm WatchSPCBranch, Calhoun, Cass, Hillsdale, Jackson, Kalamazoo and 5 more6 hr
May 7, 9:20 PM EDTMesoscale DiscussionSPCCrawford, Dane, Grant, Green, Iowa, Jefferson and 7 more85 min
May 8, 1:26 AM EDTMesoscale DiscussionSPCAdams, Brown, Buffalo, Calumet, Clark, Columbia and 34 more64 min
May 8, 1:50 AM EDTSevere Thunderstorm WatchSPCAdams, Brown, Buffalo, Calumet, Clark, Columbia and 29 more6 hr
May 8, 4:36 AM EDTMesoscale DiscussionSPCAdams, Brown, Buffalo, Calumet, Clark, Columbia and 31 more54 min
May 8, 6:35 AM EDTMesoscale DiscussionSPCAdams, Calumet, Columbia, Crawford, Dodge, Fond du Lac and 12 more55 min
May 8, 7:25 PM EDTSevere Thunderstorm WatchSPCAdams, Calumet, Columbia, Crawford, Dane, Dodge and 25 more6 hr

Nearby

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