Alert archive / Michigan / Severe Thunderstorm Watches in 2001
Severe Thunderstorm Watch 726
The Storm Prediction Center issued this severe thunderstorm watch at Sep 8, 2001, 12:15 AM EDT for 28 counties in Michigan. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 8, 2001, 12:15 AM EDT (04:15 UTC)
- Expired
- Sep 8, 2001, 5:00 AM EDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 28 counties
Antrim County, MI, Benzie County, MI, Charlevoix County, MI, Cheboygan County, MI, Chippewa County, MI, Clare County, MI, Crawford County, MI, Emmet County, MI, Gladwin County, MI, Grand Traverse County, MI, Isabella County, MI, Kalkaska County, MI, Lake County, MI, Leelanau County, MI, Mackinac County, MI, Manistee County, MI, Mason County, MI, Mecosta County, MI, Missaukee County, MI, Montmorency County, MI, Newaygo County, MI, Oceana County, MI, Ogemaw County, MI, Osceola County, MI, Oscoda County, MI, Otsego County, MI, Roscommon County, MI, Wexford County, MI
The radar
The NCL Michigan radar (KAPX), 46 km from the middle of the area, began a volume at 04:18 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 nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 00:00Z, 4.3 hours before the alert went out and 225 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
- 1318 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 769 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 81 m²/s²
- 0-3 km storm-relative helicity
- 158 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.8
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 |
|---|---|---|---|---|
| Sep 7, 8:45 PM EDT | Severe Thunderstorm Watch | SPC | Delta, Dickinson, Menominee | 3 hr |
| Sep 8, 2:30 PM EDT | Severe Thunderstorm Watch | SPC | Allegan, Arenac, Barry, Bay, Branch, Calhoun and 28 more | 7 hr |
| Sep 8, 4:30 PM EDT | Severe Thunderstorm Watch | SPC | Alcona, Alpena, Arenac, Cheboygan, Clare, Crawford and 7 more | 6 hr |
Nearby
Severe Thunderstorm Watches in Michigan, 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; radar from the NEXRAD Level II archive.