Temperature Turnaround and Long-Range Update

The heat wave across the Pacific Northwest and into B.C. is coming to an end as a Pacific trough moves in and brings cooler air into the weekend.

Temperature (deg. F.) departures and percent of normal rainfall so far this month in the northwestern U.S. and southwestern Canada.

The core of the heat will shift into the U.S. Rockies this weekend and then expand northeastward through the U.S. Plains and into parts of the Prairies by early next week. The East will also turn warmer, but nothing out of the ordinary at this point.

Heat spreads up through northern Plains and into eastern Prairies and northwestern Ontario early next week.

Still no signs of any prolonged hot spells across the Great Lakes, eastern Canada and the northeastern U.S. over the next few weeks.

There may be a brief uptick in tropical activity near the Caribbean or Bahamas right toward the end of this month and into the start of August. The central Atlantic still looks pretty quiet.

My latest interpretation of the weekly ECMWF long-range forecast model into the middle of August...