After a record hot, dry summer in Alaska, Deering, Alaska set a record low of 30 degrees today. Tok, Alaska, near Fairbanks, dropped all the way down to 26! Fairbanks dropped to 36 degrees this morning, while nearby Fort Wainwright reached 35. The low temperature this morning at Duluth, Minnesota was an incredible 77 degrees!
Heat Advisories are now lining up from Illinois to Minnesota. Excessive Heat Warnings are up in Minnesota. Temperatures around 100 are likely there in the coming days. The LOW temperature tonight & tomorrow night in Minneapolis will be 80 degrees!
Today is the start of a long-duration heat wave. Yesterday was hot, too, but the humidity was very low with our dew point as low as 49 at WLFI yesterday afternoon with relative humidity levels dropping to 27%. We also had a morning low of 56 yesterday morning & this morning, giving us nice starts with patchy fog.
It appears this will not be two heat waves, but one, prolonged stretch of near record/record heat.
The only chance of any t’storms through September 10 is August 28 & September 4.
A long-lived MCS/derecho, with origins in Minnesota/Manitoba, will likely organize & rush through Wisconsin, Michigan, Ontario & into the mid-upper Ohio Valley Wednesday to Thursday.
On Wednesday, it looks as if this might clip our far northeast. We will watch, as this is not a certainty, but the potential still exists.
The main threat with it is damaging straight-line winds.
With the arrival of new data in the coming day(s), we’ll have a better idea as to whether this will affect us & just how much it will affect us. Thus, 20% POP looks good for Wednesday afternoon-evening.
Next potential of storms after this is a week later on Wednesday, September 4 as a surface cold front approaches.
This will change the hot pattern. In fact, overnight low temperatures in the 40s are possible September 8-10.