Alert archive / Michigan / Severe Thunderstorm Watches in 2001
Severe Thunderstorm Watch 667
The Storm Prediction Center issued this severe thunderstorm watch at Aug 9, 2001, 1:45 PM EDT for 19 counties in Michigan; 6 counties in Wisconsin. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 9, 2001, 1:45 PM EDT (17:45 UTC)
- Expired
- Aug 9, 2001, 9:00 PM EDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
All 25 counties
Antrim County, MI, Benzie County, MI, Charlevoix County, MI, Cheboygan County, MI, Chippewa County, MI, Crawford County, MI, Delta County, MI, Emmet County, MI, Grand Traverse County, MI, Kalkaska County, MI, Leelanau County, MI, Mackinac County, MI, Manistee County, MI, Menominee County, MI, Missaukee County, MI, Montmorency County, MI, Otsego County, MI, Schoolcraft County, MI, Wexford County, MI, Brown County, WI, Door County, WI, Kewaunee County, WI, Manitowoc County, WI, Oconto County, WI, Outagamie County, WI
Warnings issued inside it
11 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 2:40 PM EDT | Severe Thunderstorm Warning | GRB | Door | 50 min |
| Aug 9, 2:48 PM EDT | Severe Thunderstorm Warning | GRB | Kewaunee | 42 min |
| Aug 9, 3:25 PM EDT | Severe Thunderstorm Warning | GRB | Kewaunee, Manitowoc | 50 min |
| Aug 9, 4:04 PM EDT | Severe Thunderstorm Warning | APX | Benzie, Manistee | 56 min |
| Aug 9, 4:20 PM EDT | Severe Thunderstorm Warning | GRB | Manitowoc | 55 min |
| Aug 9, 4:28 PM EDT | Severe Thunderstorm Warning | APX | Leelanau | 47 min |
| Aug 9, 5:04 PM EDT | Severe Thunderstorm Warning | APX | Antrim | 41 min |
| Aug 9, 5:05 PM EDT | Severe Thunderstorm Warning | APX | Wexford | 40 min |
| Aug 9, 5:12 PM EDT | Severe Thunderstorm Warning | APX | Grand Traverse, Kalkaska | 48 min |
| Aug 9, 5:22 PM EDT | Severe Thunderstorm Warning | APX | Crawford, Otsego | 53 min |
| Aug 9, 6:25 PM EDT | Severe Thunderstorm Warning | APX | Montmorency | 35 min |
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 12:00Z, 5.8 hours before the alert went out and 146 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
- 2090 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 932 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 77 m²/s²
- 0-3 km storm-relative helicity
- 56 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 2.3
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 4:45 PM EDT | Severe Thunderstorm Watch | SPC | Alcona, Allegan, Alpena, Arenac, Barry, Bay and 31 more | 6 hr |
| Aug 9, 5:30 PM EDT | Severe Thunderstorm Watch | SPC | Mason, Oceana | 5 hr |
| Aug 9, 1:00 AM EDT | Severe Thunderstorm Watch | SPC | Ashland, Bayfield, Burnett, Douglas, Sawyer, Washburn | 4 hr |
Nearby
Severe Thunderstorm Watches in Michigan, 2001Severe Thunderstorm Watches in Wisconsin, 2001Every severe thunderstorm watch in 2001
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.