Alert archive / Michigan / Mesoscale Discussions in 2003
Mesoscale Discussion 2209
The Storm Prediction Center issued this mesoscale discussion at Aug 21, 2003, 1:07 PM EDT for 40 counties in Michigan; 26 counties in Wisconsin. It was in force for 113 min.
The area
The outline as issued.
The facts
- Issued
- Aug 21, 2003, 1:07 PM EDT (17:07 UTC)
- Expired
- Aug 21, 2003, 3:00 PM EDT
- In force
- 113 min
- Issued by
- the Storm Prediction Center
All 66 counties
Alger County, MI, Antrim County, MI, Benzie County, MI, Charlevoix County, MI, Cheboygan County, MI, Chippewa County, MI, Clare County, MI, Crawford County, MI, Delta County, MI, Dickinson County, MI, Emmet County, MI, Gladwin County, MI, Grand Traverse County, MI, Gratiot County, MI, Isabella County, MI, Kalkaska County, MI, Kent County, MI, Lake County, MI, Leelanau County, MI, Luce County, MI, Mackinac County, MI, Manistee County, MI, Mason County, MI, Mecosta County, MI, Menominee County, MI, Midland County, MI, Missaukee County, MI, Montcalm County, MI, Montmorency County, MI, Muskegon County, MI, Newaygo County, MI, Oceana County, MI, Ogemaw County, MI, Osceola County, MI, Oscoda County, MI, Otsego County, MI, Ottawa County, MI, Roscommon County, MI, Schoolcraft County, MI, Wexford County, MI, Brown County, WI, Calumet County, WI, Dodge County, WI, Door County, WI, Florence County, WI, Fond du Lac County, WI, Forest County, WI, Green Lake County, WI, Kewaunee County, WI, Langlade 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, Portage County, WI, Shawano County, WI, Sheboygan County, WI, Washington County, WI, Waukesha County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI
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, 5.1 hours before the alert went out and 154 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.
- Mixed-layer CAPE
- 1787 J/kg
- Mixed-layer CIN
- -178 J/kg
- Mixed-layer LCL
- 1082 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 297 m²/s²
- 0-3 km storm-relative helicity
- 304 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 8:22 PM EDT | Mesoscale Discussion | SPC | Gogebic, Iron, Ontonagon | 113 min |
| Aug 21, 5:29 AM EDT | Mesoscale Discussion | SPC | Antrim, Arenac, Barry, Bay, Calhoun, Cheboygan and 26 more | 3 hr |
| Aug 21, 1:30 PM EDT | Tornado Watch | SPC | Alcona, Alpena, Antrim, Arenac, Bay, Benzie and 31 more | 6 hr |
| Aug 21, 3:49 PM EDT | Mesoscale Discussion | SPC | Alcona, Alpena, Antrim, Arenac, Bay, Benzie and 31 more | 86 min |
| Aug 21, 6:20 PM EDT | Mesoscale Discussion | SPC | Alcona, Alpena, Antrim, Arenac, Bay, Benzie and 31 more | 55 min |
Nearby
Mesoscale Discussions in Michigan, 2003Mesoscale Discussions in Wisconsin, 2003Every mesoscale discussion in 2003
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.