Alert archive / Minnesota / Severe Thunderstorm Watches in 2020
Severe Thunderstorm Watch 441
The Storm Prediction Center issued this severe thunderstorm watch at Aug 15, 2020, 3:55 PM CDT for 19 counties in Minnesota; 4 counties in North Dakota. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 15, 2020, 3:55 PM CDT (20:55 UTC)
- Expired
- Aug 15, 2020, 9:45 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 55 kt
All 23 counties
Aitkin County, MN, Becker County, MN, Beltrami County, MN, Cass County, MN, Clearwater County, MN, Crow Wing County, MN, Hubbard County, MN, Itasca County, MN, Kittson County, MN, Koochiching 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, Wadena County, MN, Grand Forks County, ND, Pembina County, ND, Traill County, ND, Walsh County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 140 km from the middle of the area, began a volume at 20:54 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 20%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 20%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 40%
- Six or more combined severe hail and wind reports
- 60%
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 14, 7:28 PM CDT | Mesoscale Discussion | SPC | Anoka, Carlton, Carver, Chisago, Dakota, Hennepin and 7 more | 92 min |
| Aug 14, 10:21 PM CDT | Mesoscale Discussion | SPC | Fillmore, Mower, Olmsted, Wabasha, Winona | 54 min |
| Aug 15, 3:14 PM CDT | Mesoscale Discussion | SPC | Aitkin, Beltrami, Cass, Clearwater, Hubbard, Itasca and 7 more | 61 min |
| Aug 15, 6:39 PM CDT | Mesoscale Discussion | SPC | Beltrami, Cass, Clearwater, Hubbard, Itasca, Kittson and 8 more | 96 min |
Nearby
Severe Thunderstorm Watches in Minnesota, 2020Severe Thunderstorm Watches in North Dakota, 2020Every severe thunderstorm watch in 2020
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.