Alert archive / Minnesota / Severe Thunderstorm Watches in 2001
Severe Thunderstorm Watch 217
The Storm Prediction Center issued this severe thunderstorm watch at May 9, 2001, 7:30 PM CDT for 12 counties in Minnesota; 11 counties in Wisconsin. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- May 9, 2001, 7:30 PM CDT (00:30 UTC)
- Expired
- May 10, 2001, 1:00 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 23 counties
Aitkin County, MN, Benton County, MN, Carlton County, MN, Chisago County, MN, Crow Wing County, MN, Isanti County, MN, Kanabec County, MN, Mille Lacs County, MN, Morrison County, MN, Pine County, MN, Sherburne County, MN, Stearns County, MN, Ashland County, WI, Barron County, WI, Bayfield County, WI, Burnett County, WI, Douglas County, WI, Iron County, WI, Polk County, WI, Price County, WI, Rusk County, WI, Sawyer County, WI, Washburn County, WI
The radar
The Duluth radar (KDLH), 80 km from the middle of the area, began a volume at 00:25 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
11 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 9, 7:44 PM CDT | Severe Thunderstorm Warning | DLH | Pine | 61 min |
| May 9, 7:57 PM CDT | Tornado Warning | DLH | Pine | 48 min |
| May 9, 8:01 PM CDT | Severe Thunderstorm Warning | MPX | Kanabec, Mille Lacs | 44 min |
| May 9, 8:06 PM CDT | Tornado Warning | MPX | Kanabec, Mille Lacs | 39 min |
| May 9, 8:12 PM CDT | Severe Thunderstorm Warning | DLH | Burnett, Washburn | 63 min |
| May 9, 8:29 PM CDT | Tornado Warning | MPX | Barron | 31 min |
| May 9, 8:44 PM CDT | Severe Thunderstorm Warning | DLH | Pine | 46 min |
| May 9, 8:55 PM CDT | Tornado Warning | DLH | Pine | 50 min |
| May 9, 8:59 PM CDT | Tornado Warning | MPX | Barron, Rusk | 46 min |
| May 9, 9:05 PM CDT | Tornado Warning | DLH | Burnett | 55 min |
| May 9, 9:19 PM CDT | Severe Thunderstorm Warning | DLH | Washburn | 56 min |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 0.5 hours before the alert went out and 170 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
- 1211 J/kg
- Mixed-layer CIN
- -80 J/kg
- Mixed-layer LCL
- 1740 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 368 m²/s²
- 0-3 km storm-relative helicity
- 795 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 8.0
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 |
|---|---|---|---|---|
| May 9, 10:00 PM CDT | Severe Thunderstorm Watch | SPC | Houston | 5 hr |
| May 10, 4:15 PM CDT | Severe Thunderstorm Watch | SPC | Lafayette | 6 hr |
| May 10, 5:00 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Calumet, Columbia, Crawford, Dane and 22 more | 5 hr |
Nearby
Severe Thunderstorm Watches in Minnesota, 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; radar from the NEXRAD Level II archive.