Alert archive / Wisconsin / Severe Thunderstorm Watches in 2001
Severe Thunderstorm Watch 661
The Storm Prediction Center issued this severe thunderstorm watch at Aug 8, 2001, 4:30 AM CDT for 4 counties in Michigan; 4 counties in Minnesota; 7 counties in Wisconsin. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 8, 2001, 4:30 AM CDT (09:30 UTC)
- Expired
- Aug 8, 2001, 10:00 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
Counties Gogebic County, MI, Houghton County, MI, Iron County, MI, Ontonagon County, MI, Aitkin County, MN, Carlton County, MN, Lake County, MN, Saint Louis County, MN, Ashland County, WI, Bayfield County, WI, Douglas County, WI, Forest County, WI, Iron County, WI, Oneida County, WI, Vilas County, WI
The radar
The Duluth radar (KDLH), 60 km from the middle of the area, began a volume at 09:31 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 8, 5:11 AM CDT | Severe Thunderstorm Warning | DLH | Saint Louis | 64 min |
| Aug 8, 5:35 AM CDT | Severe Thunderstorm Warning | DLH | Lake | 55 min |
| Aug 8, 5:36 AM CDT | Severe Thunderstorm Warning | DLH | Douglas | 39 min |
| Aug 8, 6:12 AM CDT | Severe Thunderstorm Warning | DLH | Bayfield | 33 min |
| Aug 8, 6:28 AM CDT | Severe Thunderstorm Warning | DLH | Ashland | 62 min |
| Aug 8, 7:26 AM CDT | Severe Thunderstorm Warning | MQT | Houghton, Ontonagon | 49 min |
The nearest sounding before it
International Fa, MN (KINL), launched 00:00Z, 9.5 hours before the alert went out and 213 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
- 1009 J/kg
- Mixed-layer CIN
- -146 J/kg
- Mixed-layer LCL
- 1873 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 2 m²/s²
- 0-3 km storm-relative helicity
- 137 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 8, 8:45 AM CDT | Severe Thunderstorm Watch | SPC | Alger, Baraga, Chippewa, Delta, Dickinson, Luce and 3 more | 4 hr |
| Aug 8, 1:00 AM CDT | Severe Thunderstorm Watch | SPC | Becker, Cass, Clay, Crow Wing, Hubbard, Mahnomen and 7 more | 5 hr |
| Aug 8, 4:00 PM CDT | Severe Thunderstorm Watch | SPC | Aitkin, Carlton, Cass, Crow Wing, Kanabec, Pine | 6 hr |
| Aug 8, 6:00 PM CDT | Tornado Watch | SPC | Becker, Clay, Kittson, Mahnomen, Marshall, Norman and 4 more | 5 hr |
Nearby
Severe Thunderstorm Watches in Wisconsin, 2001Severe Thunderstorm Watches in Michigan, 2001Severe Thunderstorm Watches in Minnesota, 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.