Alert archive / Michigan / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 723
The Storm Prediction Center issued this severe thunderstorm watch at Aug 9, 2004, 1:05 PM EDT for 13 counties in Michigan; 11 counties in Wisconsin. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 9, 2004, 1:05 PM EDT (17:05 UTC)
- Expired
- Aug 9, 2004, 7:00 PM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 24 counties
Alger County, MI, Baraga County, MI, Charlevoix County, MI, Delta County, MI, Dickinson County, MI, Emmet County, MI, Iron County, MI, Leelanau County, MI, Luce County, MI, Mackinac County, MI, Marquette County, MI, Menominee County, MI, Schoolcraft County, MI, Brown County, WI, Door County, WI, Florence County, WI, Forest County, WI, Kewaunee County, WI, Marinette County, WI, Menominee County, WI, Oconto County, WI, Outagamie County, WI, Shawano County, WI, Winnebago County, WI
The radar
The Marquette radar (KMQT), 50 km from the middle of the area, began a volume at 17:07 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.
Warnings issued inside it
6 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 3:45 PM EDT | Severe Thunderstorm Warning | GRB | Marinette | 45 min |
| Aug 9, 4:00 PM EDT | Severe Thunderstorm Warning | MQT | Delta, Marquette, Menominee | 60 min |
| Aug 9, 5:01 PM EDT | Severe Thunderstorm Warning | MQT | Delta | 59 min |
| Aug 9, 5:33 PM EDT | Severe Thunderstorm Warning | MQT | Marquette | 57 min |
| Aug 9, 5:58 PM EDT | Severe Thunderstorm Warning | MQT | Alger | 32 min |
| Aug 9, 6:57 PM EDT | Severe Thunderstorm Warning | MQT | Menominee | 33 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 12:00Z, 5.1 hours before the alert went out and 199 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
- 1021 J/kg
- Mixed-layer CIN
- -47 J/kg
- Mixed-layer LCL
- 718 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 116 m²/s²
- 0-3 km storm-relative helicity
- 138 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.8
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 11:53 AM EDT | Mesoscale Discussion | SPC | Baraga, Dickinson, Iron, Marquette, Menominee | 97 min |
| Aug 9, 4:32 PM EDT | Mesoscale Discussion | SPC | Alger, Baraga, Charlevoix, Delta, Dickinson, Emmet and 7 more | 88 min |
| Aug 9, 7:50 PM EDT | Severe Thunderstorm Watch | SPC | Alcona, Allegan, Alpena, Antrim, Arenac, Barry and 38 more | 5 hr |
| Aug 8, 10:11 PM EDT | Mesoscale Discussion | SPC | Barron, Burnett, Chippewa, Clark, Douglas, Lincoln and 7 more | 64 min |
Nearby
Severe Thunderstorm Watches in Michigan, 2004Severe Thunderstorm Watches in Wisconsin, 2004Every severe thunderstorm watch 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.