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Blog

Weather forecasting and analysis, space and historic events, climate information

Filtering by Category: HSV

**A powerful jet streak, intense blocking, cold air intrusion, and a likely Hurricane (Melissa)...ingredients for an energetic weather pattern from later next week into the following week**

Paul Dorian

The European model run on Monday morning produced some stunningly high rainfall amounts of a foot or more in much of the Mid-Atlantic region for the 5-day period ending on Saturday, November 1st. Meanwhile, the Canadian model run from Monday night featured what is likely to be a hurricane (Melissa) producing accumulating snow over some of the higher elevations of the Northeast US late next week after it shifts northwest towards the New England coastline and encounters an unusually cold air mass. While odds are against either of these scenarios coming to fruition, they do suggest to me that the models are correctly sniffing out the potential for some energetic weather from later next week into the following week and there are several ingredients likely to come into play for just such a pattern. The ingredients include a powerful jet streak that will push into the western US this weekend from the northern Pacific Ocean, intense blocking in the upper part of the atmosphere that is likely to develop across central Canada by the middle of next week, a cold air intrusion into the US from Canada, and a likely hurricane over the western Atlantic Ocean.

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**An energetic pattern setting up for late next week into early November...a cold air mass, tropical activity, and a “buckling” jet stream**

Paul Dorian

There have been some notable storms near the east coast during the late stages of October and early parts of November including Hurricane Sandy in 2012, the so-called “Perfect Storm” in 1991, and Hurricane Nicole in 2022 which made landfall in Florida. It is at this time of year where there can be a “last gasp” from the Atlantic Basin tropical season as water is still quite warm in places like the Caribbean Sea, and southwestern Atlantic Ocean. At the same time, there is often an increasing frequency of chilly air masses moving from Canada into the US warning us that winter is not too far away. It is this combination of a waning tropical season combined with increasingly winter-like chill that can cause volatile weather patterns in late October and early November and we could be setting up for something like that for late next week into the beginning of November.

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6:00 AM | *Warm weather pattern continues next few days across the Tennessee Valley*

Paul Dorian

The weather stays warm for the next few days with afternoon highs today and Friday in the lower 80’s and then the middle 80’s are likely to start the weekend. An approaching cold front with support of an upper-level trough will bring an increasing chance of showers and thunderstorms by later in the upcoming weekend and temperatures will trend down some for the early part of next week.  

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6:00 AM | *A warm stretch of weather coming to the Tennessee Valley for the next few days*

Paul Dorian

The weather will turn warmer for the next few days with afternoon highs today and Thursday in the lower 80’s and then the middle 80’s by the end of the week. An approaching cold front with support of an upper-level trough will bring an increasing chance of showers and thunderstorms by later in the upcoming weekend and temperatures will trend down some for the early part of next week.  

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***Significant coastal storm to impact the Carolinas, Mid-Atlantic, and Northeast US from later Saturday into late Monday...prolonged period of onshore flow leads to coastal flooding/beach erosion***

Paul Dorian

Low pressure is going to intensify significantly this weekend near the Southeast US coastline, induced by a frontal boundary zone that slides into the region and energized by an upper-level trough that drops southeast across the Great Lakes. It appears increasingly likely that this strong coastal storm will then push far enough to the north to have an impact on the Carolinas, Mid-Atlantic, and Northeast US all the way from later Saturday into late Monday. The worst impact will be along coastal sections where rain will be heaviest, winds will be strongest, and the threat of coastal flooding/beach erosion will be high due to a prolonged period of onshore flow.

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