Such we mentioned in the previous article, predicting the longest heatwave for Midwest and Northeast in Summer 2021 /https://mkweather.com/longest-heatwave-in-northeast-and-midwest-the-usa-in-summer-2021-then-extreme-heat-dome-above-northern-usa//, extreme heat dome will gradually hit northern parts of the USA and southern Canada in the next 10 days (between 13.-23. August 2021).
Extremely hot is currently already in Northwest, USA, where 104°F / +40°C in Portland, Oregon, is forecasted.
Similarly, 3-digit (possibly above 104°F / +40°C) temperatures are gradually forecasted for all regions along the US-Canadian border and a powerful heatwave will hit the northern Rocky Mountains, Northern Plains, Plains in Canada, Great Lakes region, and parts of Northeast and southeastern Canada.
In many regions, the hottest days of the year 2021 are forecasted.
Meanwhile, above Florida and Southeast, Tropical storm, or even future Hurricane Fred is moving and behind it, the next powerful tropical system is developing /the next Mkweather article/, therefore in mid-August 2021, Southwest will be colder and very stormy, with a possibility of floods or severe winds.
During the last August week, the next heat dome is possible to develop above Northwest, with shifting eastward.
According to ECMWF 6-week forecast /https://mkweather.com/ecmwf-6-week-forecast-europe-north-america-world//, heatwaves in northern parts of the USA and neighboring Canada are possible until 20. September 2021.
Meanwhile, in Europe, pressure high Lucifer already brought in another heat dome an all-time Europen record, +48,8°C in Siracusa, Italy /https://mkweather.com/siracusa-italy-488c-european-all-time-temperature-record-was-broken//.
September should be across Northern Hemisphere according to the current estimates warmer, yet, but in October, powerful cooldowns, AO- and NAO- are possible. Hurricane season will be peaking, soon, too, which should cause the next cooldowns in the North American-Euroatlatic sector.
Source: wxcharts.com
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