The extreme summer of heat & drought in parts of the U.S. continues with 109 for a high at Glasgow, Montana yesterday. Billings hit 108. Worland, Wyoming reached 106, Sheridan 104, Lander 100, 103 at Bismarck, North Dakota & 101 at Minot. Way up on the shores of the Arctic Ocean of northern Alaska, Deadhorse shot up to 72, while an incredible 78 was recorded at the northern tip of the Northwest Territories, Canada at Trail Valley. A buoy in the Arctic Ocean north of the Northwest Territories hit 66.
Here, highs yesterday reached 82-88 with thick smoke. Heat indices reached as high as 91.
Extreme heatwave will migrate southeastward & expand & intensify in the Plains later this week, through next weekend & peak next week. Widespread record highs are likely with some places potentially seeing their highest temperatures since 1936 or 1954. Some data suggests deadly heat wave with highs 108-116 in the Plains with 104 to St. Louis & 94-100 here. The worst of the heat is projected from North & South Dakota to Kansas with some of it reaching western Iowa & Minnesota.
Dew points in our area of 76-81 may be trapped under cap & ridge & with temperatures 94-100, dangerous heat indices +110 are possible.
We will watch a "Ring of Fire" "Ridge Rider" Friday move southeastward. It may clip us. Depending on the smoke thickness & how much it develops toward our area, some severe weather risk could occur.
Another "Ridge Rider" may side-swipe us Saturday. Some severe weather risk could occur with it.
Another one could skim by next week.
Main event for storms & severe would be the main strong upper trough & cold front that will bring about sudden pattern change. Timing right now is around August 2, but severe storms could occur as we go from 94-100 with heat indices +110 to 76-81 for highs with lows 51-56 for a time.
We should heat back up, however, by August 9-10 with 80s & 90s again.
Here is that cooler air coming in with the deep upper trough, but note how the extreme upper ridge doesn't go away, it just migrates west & northwestward. In this image for the evening of August 4, you can see how it already begins to migrate a bit back east.
Note our projected temperatures of 71-73 at 8 p.m.
Temperature anomalies for the month of August overall look like this. We will likely average above normal temperature-wise, but there will be some comfortable stretches of below normal temperatures.
Core of the really high temperature anomalies will be the Northwest U.S. (once again) & in Canada from British Columbia to Manitoba. The Northern Great Lakes & western Ontario will also likely be much hotter than normal.
Rainfall looks a bit below normal.