/Issued 7:30 PM CDT, Thursday, June 28, 2018/
Thunderstorms, some strong to severe could form into a larger complex or bow echo tonight over North Dakota, these storms would then track toward the east, or possibly a little southeast or northeast Friday morning.
21z RAP model
12z European model (6.28.2018)
Widespread excessive heat warnings, watches or heat advisories in effect for Friday.
Scattered showers and thunderstorms Wednesday afternoon/evening with some heavy downpours in spots, and just by looking at this radar image you can tell which way the storms were moving, to the southeast!
Severe weather reports map for Thursday, June 28, 2018.
June 28, 2018 Northland Storm Reports
6:25 PM: Hail — 1.00 inch. 3 SSW Bruno, MN (Pine County) Quarter sized hail from 6:23 PM to 6:35 PM.
6:12 PM: Hail — 1.00 inch. Willow River, MN (Pine County) Quarter sized hail.
5:23 PM: Hail — 0.25 inch. Tamarack, MN (Aitkin County)
5:00 PM: Hail — 0.75 inch. 5 SSE Libby, MN (Aitkin County)
4:40 PM: Thunderstorm Wind Damage. 1 SW Mahtowa, MN (Carlton County) Trees down across Highway 61 south of Mahtowa.
4:40 PM: Thunderstorm Wind Damage. 1 E Barnum, MN (Carlton County) Numerous 30 to 40 foot tall trees down both north and south of the Barnum exit along I-35.
4:35 PM: Hail — 0.50 inch. 2 NNE Barnum, MN (Carlton County) Report of hail and debris along Highway 61 north of Barnum.
3:53 PM: Hail — 0.50 inch. 5 NW Tamarack, MN (Aitkin County) Hail duration was 5 to 10 minutes.
3:40 PM: Hail — 0.25 inch. 5 SSW Balsam, MN (Aitkin County) Reported on Horseshoe Lake.
3:13 PM: Hail — 1.00 inch. 1 N Bena, MN (Cass County) Report of cherry tomato-sized hail at a resort on the South Shore of Lake Winnibigoshish.
2:55 PM: Hail — 1.75 inch. 1 NW Bena, MN (Cass County) Pea to Golf Ball sized hail feel for over 7 minutes.
2:41 PM: Hail — 1.00 inch. 7 WNW Swatara, MN (Cass County) Quarter sized hail, with the largest stones slightly larger than a quarter.
2:10 PM: Hail — 0.25 inch. 3 NE Hermantown, MN (St. Louis County) Pea sized hail at the Duluth Airport.
1:56 PM: Funnel Cloud. 2 E Munger, MN (St. Louis County) Multiple 911 calls of a funnel cloud near the 4000 block of Solway Rd.
1:52 PM: Heavy Rain — 1.50 inch. 1 S Twig, MN (St. Louis County) Pea sized hail too.
1:20 PM: Hail — 0.25 inch. 2 N Remer, MN (Cass County)
11:06 AM: Hail — 0.75 inch. 6 SE La Prairie, MN (Itasca County) Hail duration was about 5 minutes.
10:45 AM: Hail — 1.25 inch. 6 SW Grand Rapids, MN (Itasca County) One inch hail with a few stones to half-dollar sized.
Link to Power Outage Maps
Minnesota Power: http://outagemap.mnpower.com/external/default.html
Lake Country Power: http://mi.lcp.coop:82/#viewer-menu-parent
Rainfall Reports for June 28, 2018
Hill City, MN: 2.46″
Moose Lake, MN: 0.64″
Saginaw, MN: 0.63″
Cass Lake, MN: 0.53″
McGregor, MN: 0.39″
Duluth Airport: 0.34″
Grand Rapids, MN: 0.22″
Chisholm-Hibbing Airport: 0.12″
It was an active day in parts of north central and east central Minnesota as several strong to severe thunderstorms, some of which were supercellular developed before Noon today while tracking toward the east and southeast. These storms likely formed near the boundary that moved through our area Wednesday evening, enough lift near that front coupled with high amounts of instability, moisture and wind shear helped to generate these storms that hit parts of the Northland today.
As of 8 PM all is quiet in our area. A warm front stretched roughly from central North Dakota to south central Minnesota with powerful thunderstorms forming over portions of north central North Dakota in an area of greatest convergence per meso-analysis.
It should remain quiet in the Northland most of the night, however, additional thunderstorms some strong to severe are forecast to redevelop after 3 or 4 AM Friday. It’s possible that will see a larger complex of thunderstorms, perhaps a bow echo with a potential for damaging winds sweeping through portions of the Northland Friday morning (5 AM to 10 AM time frame) What area of the Northland gets hit Friday morning is still unclear as of 8 PM — Could be as far north as the Ontario-Minnesota border, or farther south toward Aitkin, Moose Lake and Ashland.
By Friday afternoon, the warm frontal boundary is forecast to lift into far northern Minnesota and extend southeast around Lake Superior thanks to an east wind/marine layer. Temperatures aloft should warm significantly over the entire area by Friday afternoon which should keep thunderstorms from redeveloping Friday afternoon and evening.
Thunderstorms could impact parts of the area once again late Friday night or Saturday morning as a cold front moves slowly east out of western Minnesota. Note: There will be sufficient instability and wind shear in place for some of the storms to become strong to severe Friday night/Saturday morning.
As for temperatures Friday afternoon — I think the east wind is going to win out near Lake Superior so temperatures will likely only be in the 60s near the lake while on top of the hill in Duluth 70s to lower 80s. Farther inland from Lake Superior, highs Friday afternoon ranging from the mid 80s to mid 90s, warmest temps in eastern Minnesota and northwest Wisconsin. It still looks very humid on Friday with dew points in the upper 60s to middle 70s although lower dew points will be found near Lake Superior due to the cooler temperatures.