5:48 PM Monday 7/26/2021
A Severe Thunderstorm Watch has been issued for parts of northeast, north-central and east-central Minnesota. This watch is in effect until Midnight tonight.
Primary threats include
Scattered large hail and isolated very large hail to events to 4 inches in diameter likely (grapefruit size)
Scattered damaging winds and isolated significant gusts to 80 mph possible
A tornado or two possible
Some cities in the Northland included in this watch are…Bigfork, Grand Rapids, Cass Lake, Walker, Longville, Brainerd, Aitkin, Hill City, McGregor, Pine City, Hinckley, Moose Lake, Carlton, Cloquet, Duluth, Hibbing, Cook, Orr, Crane Lake and Ely.
Remember a severe thunderstorm watch means conditions are favorable for severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. Severe thunderstorms can and occasionally do produce tornadoes.
One supercell thunderstorm has already developed late this afternoon north of Bemidji and west of Blackduck, with a gigantic hail threat, possibly as big as 3 to 4 inches in diameter, or the size of tea cups to grapefruits!
Here’s a look at that supercell thunderstorm on Goes-16 sandwich imagery from Monday, July 26, 2021.
Seeing good inflow into that storm with S-SE low level winds pulling warm, humid and unstable air into the southeastward moving supercell.
5:46 PM Monday — Severe thunderstorms currently north of the Bemidji area should hold together as they continue to move southeast over the next few hours, while additional strong to severe thunderstorms could develop in the orange outlined area on map through this evening.