Alert archive / Minnesota / Severe Thunderstorm Watches in 2001
Severe Thunderstorm Watch 645
The Storm Prediction Center issued this severe thunderstorm watch at Jul 31, 2001, 4:45 AM CDT for 12 counties in Minnesota. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 31, 2001, 4:45 AM CDT (09:45 UTC)
- Expired
- Jul 31, 2001, 8:00 AM CDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
Counties Beltrami County, MN, Clearwater County, MN, Hubbard County, MN, Kittson County, MN, Lake of the Woods County, MN, Mahnomen County, MN, Marshall County, MN, Norman County, MN, Pennington County, MN, Polk County, MN, Red Lake County, MN, Roseau County, MN
The radar
The Fargo/Grand Forks radar (KMVX), 140 km from the middle of the area, began a volume at 09:48 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
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 4:47 AM CDT | Severe Thunderstorm Warning | FGF | Pennington, Polk, Red Lake | 28 min |
| Jul 31, 4:47 AM CDT | Severe Thunderstorm Warning | FGF | Beltrami, Kittson, Marshall, Roseau | 28 min |
| Jul 31, 4:47 AM CDT | Severe Thunderstorm Warning | FGF | Clearwater | 28 min |
| Jul 31, 5:37 AM CDT | Severe Thunderstorm Warning | FGF | Beltrami, Lake of the Woods | 38 min |
The nearest sounding before it
International Fa, MN (KINL), launched 00:00Z, 9.8 hours before the alert went out and 183 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
- 304 J/kg
- Mixed-layer CIN
- -540 J/kg
- Mixed-layer LCL
- 1483 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 88 m²/s²
- 0-3 km storm-relative helicity
- 254 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 |
|---|---|---|---|---|
| Jul 31, 4:00 PM CDT | Tornado Watch | SPC | Becker, Beltrami, Cass, Clay, Clearwater, Hubbard and 11 more | 6 hr |
Nearby
Severe 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.