Supercell storms produce 4 tornadoes in Brainerd lakes region – Brainerd Dispatch

BRAINERD — Four tornadoes were produced as severe storms slashed through the lakes area Wednesday, June 12.

The National Weather Service issued a preliminary damage survey report Friday,

finding four tornadoes touched down

as part of this line of storms. The strongest and largest tornado with the highest winds was on Clamshell Lake and the Rabbit Lake tornado was second with its wind strength and width and stayed on the ground for 13 miles.

tornadopaths.jpg

Contributed / National Weather Service

Tornadoes are ranked by the National Weather Service on an enhanced Fujita scale, EF-0 to EF-5, that estimages wind based on damage, which looks at 28 damage indicators. An EF-0 is the smallest ranking with wing gusts of 65-85 mph while the devastating EF-5 has wind speeds more than 200 mph. No injuries or deaths were reported.

In looking at

the damage from Wednesday’s storm

, the weather service’s preliminary report found with tornadoes noted by time:

  • 6:18-6:23 p.m. Whitefish Lake/Clamshell Lake tornado in Crow Wing County, rated a EF-2, with estimated peak wind speeds of 120 mph, had a 3.2 mile path and a maximum width of 700 yards. 
  • 6:42-6:54 p.m. Wright/Cromwell in Carlton County tornado was rated an EF-0 with estimated peak winds of 80 mph. Its path was 7.8 miles long and its maximum width was 50 yards wide. 
  • 6:45-7:05 p.m. tornado in Rabbit Lake in Crow Wing County moving to Cedar Lake/Hammal Lake in Aitkin County, was on the ground for 13.1 miles and its maximum width was 200 yards wide. It had estimated peak winds of 115 mph and was rated an EF-2. 
  • 7:25-7:29 p.m. a tornado touched down south of Glen in Aitkin County with estimated peak winds of 65 mph. It was ranked an EF-0, was 1.6 miles long and maximum width was 20 yards. 

National Weather Service preliminary report

In its report, the weather service noted numerous severe thunderstorms moved across north-central and northeast Minnesota Wednesday, producing large hail to the size of baseballs, isolated thunderstorm wind damage, and several tornadoes.

“Two distinct supercellular storms produced four tornadoes (rated EF-0 to EF-2) across portions of Crow Wing, Aitkin, and Carlton Counties between roughly 6:15 p.m. and 7:30 p.m. The supercell that tracked through Crow Wing and Aitkin County produced three separate tornadoes, first on/near Upper Whitefish Lake across to Clamshell Lake where a wide, sharp path of damage was found,” the weather service stated in an overview of the storms.

A tree ripped up by the roots leans on a cabin.

A tree ripped up by the roots leans on a cabin Thursday, June 13, 2024, after a tornado moved through the area near Jenkins the day before.

Kelly Humphrey / Brainerd Dispatch

The Clamshell Lake tornado dissipated. A second tornado formed west of Rabbit Lake.

“This second tornado appeared to have a mainly continuous path of damage from Rabbit Lake to Cedar Lake and Hammal Lake,” the weather service reported. “There may have been a break in this tornado as it traveled across the Crow Wing State Forest, but a combination of storm chaser and spotter video as well as ground surveys seemed to indicate a mainly consistent path of damage.”

A supercell storm contains updrafts that rotate about a vertical axis and people may note having seen such a tall storm with an anvil top that stretches across the sky. The National Weather Service notes supercell storms are the least common thunderstorm but have a high tendency of producing severe weather with very large hail and weak to violent tornadoes.

As the Wednesday super cell moved through the area it later created “a weak, wispy tornado with no known damage near Glen.”

A separate supercell briefly created a weak tornado in northwest Carlton County.

The National Weather Service reported the first tornado developed over Upper Whitefish Lake and looking at damage, the tornado appears to have touched down on land before crossing the lake and then traveled southeast toward Pelican Lake.

Where the tornadoes started

Damage to homes and forest along Old Whiskey Road and Rutger Road (Tip Top Point) and across Bertha and Clamshell Lake toward the eastern reach of Whitefish Golf Club’s holes.

The weather service reported the “damage path was the widest near Old Whiskey and Rutger Road, around 700 yards across, with tree damage even identified on the island to the north of Old Whiskey Road. Over 80% of trees were uprooted or snapped near the base, and numerous homes showed minor to major roof damage. The worst of the roof damage was several homes which had over 50% of the roof deck uplifted and removed.”

Storm damage 6/13 (14)

Storm damage seen Thursday, June 13, 2024, on Old Whiskey Road in Ideal Township.

Theresa Bourke / Brainerd Dispatch

Homeowners, the weather service stated, reported a nearly hour-long storm surge of 1 to 2 feet from Upper Whitefish Lake. Photographs and video footage from private individuals and businesses show twisted, damaged and overthrown boat lifts, overturned boats and damage to buildings.

DJI_20240613084710_0013_V (1).JPG

Damage in Ideal Township.

Courtesy / Crow Wing County Drone Team

Drone video from the Crow Wing County Drone Team shows roof damage, building damage with a demolished boat house on Clamshell Lake, and uprooted trees. The weather service report noted a Minnesota State Patrol helicopter found sporadic tornadic tree damage south of County Highway 16 near Clear Lake.

The Rabbit Lake tornado developed near Wolford and was produced from the same supercell storm that created the Whitefish/Clamshell tornado.

The damage path of snapped and uprooted trees appears to start along County Highway 30 south of County Highway 11 and the Mississippi River. The tornado traveled east-southeast across Rabbit Lake, just north of Cuyuna, and then toward Highway 210.

“Damage along the western shore of Rabbit Lake affected private residences with a RV flipped over, roof covering material partially removed, and numerous trees snapped which lead to secondary home damage, including several collapsed out-buildings and garage,” the weather service reported, noting the tornado crossed Highway 210 where it

continued to damage trees and where it was captured on livestreaming storm chaser video footage

.

The tornado took a southeastward path across portions of western Cedar Lake with extensive tree damage and what the weather service described as pockets of residential damage to roofs and garages. The tornado picked up a fish house and threw it nearly 100 yards.

“This is the area of low-end EF-2 damage,” the weather service reported. “The tornado path then became more eastward as it neared the end of its lifecycle, with final damage found on Hammal Lake, where localized pockets of extensive tree damage were located, and one three-season cabin and boat house were completely destroyed and partially thrown into the water.”

Crow Wing County temporarily closed the Milford Mine Memorial Park due to downed trees but posted a note Thursday night that debris was cleared and the park was once again open from dawn to dusk.

Friday night, the Crow Wing County Sheriff’s Office shut down its command operations at the Crosslake Fire Department, stating all roads were clear and power restored to all but a handful of locations, mainly from those needing local electricians to finish residential hook ups.

rain.jpg

Contributed / National Weather Service

Next weather to watch for — flash flooding with heavy rain

A flash flood watch is in effect Monday through Wednesday across the region with an extended period of moderate to heavy rain in the forecast. Widespread rain amounts of 2-3 inches or more is expected by Tuesday night.

And there is a chance for more severe weather. The National Weather Service in Duluth reported isolated to scattered severe storms are possible with primary hazards of hail and damaging winds, noting a tornado can’t be ruled out.

For the Brainerd area, the probability of rain was 85-90% starting at 6 a.m. Monday and continuing into Tuesday with the potential for rain dropping to 65% by midnight.

The seven-county area had a 40-70% chance of flash flooding.

Graphic of hot weather outlook

Contributed / National Weather Service

From the Brainerd lakes area to the Iron Range and southeast, the weather service reported a 15-30% chance for 3 inches of rain in 24 hours. For historic context, the weather service noted this is the first moderate level (Level 3 of 5) excessive rainfall outlook in four years.

Expect a hot Tuesday with temperatures in the mid-80s and increasing humidity.

Renee Richardson, managing editor, may be reached at 218-855-5852 or renee.richardson@brainerddispatch.com. Follow on Twitter at www.twitter.com/DispatchBizBuzz.

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