Freeze warnings to 90 degrees in about 10 days
Significant heat wave possible in early June
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Our chilly, rainy April flashback has many of us asking: When will the warmer air will return?
First we have to get through a few cooler nights, especially in northern Minnesota. Freeze warnings and watches are up into Friday morning for central and northern Minnesota and much of North Dakota.
Including the cities of International Falls, Ely, Isabella, Bigfork, Hibbing, Two Harbors, Silver Bay, Grand Marais, Walker, Grand Rapids, Pine River, Brainerd, Hill City, Aitkin, Duluth, Pine City, Hinckley, Superior, Washburn, Bayfield, Ashland, Hurley, Grantsburg, Spooner, Hayward, and Phillips
322 PM CDT Thu May 27 2021
...FREEZE WARNING REMAINS IN EFFECT FROM 10 PM THIS EVENING TO 9 AM CDT FRIDAY...
* WHAT...Sub-freezing temperatures as low as 20 expected.
* WHERE...Northern Cook and Lake, Koochiching, Southern Cook, North St. Louis, North Itasca and Central St. Louis Counties. This includes the Tribal Lands of the Grand Portage Reservation and the Bois Forte Band, Deer Creek, Lake Vermilion and, Nett Lake areas.
* WHEN...From 10 PM this evening to 9 AM CDT Friday.
* IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.
Temperatures slowly moderate back into the 70s over Memorial Day weekend. Ron Trenda posted a detailed Memorial Day weekend forecast here. In this post, I gaze ahead dreamily at a more summery forecast next week.
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Upper winds change next week
Meteorologists watch upper air trends closely to gauge overall temperature patterns in the one to two-week forecast range. Take a look at Thursday’s upper air maps. You can see the cool blue blob over the Upper Midwest with our Thursday rain event.
Now take a look at the forecast for next weekend. NOAA’s GFS model upper air forecast chart for Sunday, June 6 shows a building ridge of warm high pressure across the Upper Midwest.
The European model cranks out highs into the 80s to near 90 degrees across southern Minnesota by the first weekend in June.
Now check out the upper air forecast chart for June 9. It cranks up a huge dome of unseasonably hot air across the Upper Midwest. Patterns like this typically produce highs well into the 90s.
If this pattern verifies, we could see an intense early June heatwave build up over the Upper Midwest in about two weeks.
Stay tuned.