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Blog

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

Filtering by Category: HSV

6:00 AM | **Showers from time-to-time this weekend and maybe even a strong-to-severe thunderstorm**

Paul Dorian

The overall weather pattern looks to favor increasing warmth for the Tennessee Valley with high temperatures over the next couple of days in the lower 60’s and then 70 degrees will be possible by early next week. The weather will be somewhat unsettled as well during the next few days with showers possible from time-to-time and a strong thunderstorm cannot be ruled out.

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**Southern storm to produce widespread rain this weekend in the Deep south and a severe weather threat...Mid-Atlantic region on the northern fringes by late Sunday**

Paul Dorian

A low pressure system that produced some beneficial rain and snow across California on Wednesday will ride along the newly activated sub-tropical jet stream and re-emerge over the south-central states early this weekend. Warm and humid air will flow northward into this system from the Gulf, and this will help to intensify and expand the storm’s precipitation shield...all good news for the Deep South where it has been quite dry in recent weeks. The influx of warm and humid air will also help to destabilize the atmosphere, leading to a severe weather threat by later Saturday and Saturday night in portions of the south-central US. This system will then push eastward and head towards the eastern seaboard on Sunday potentially bringing some mixed precipitation to the Mid-Atlantic region which will be on the northern fringes of its moisture field. Much milder weather will follow across the northeastern states by the middle of next week.

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**Changing weather pattern results in storm that impacts the western states during the next couple of days...southern states this weekend...and some impact possible in the Mid-Atlantic**

Paul Dorian

The polar jet has dominated the scene in recent weeks across North America resulting in numerous Arctic air masses being transported from western Canada into the northeastern states, but changes are underway as the sub-tropical jet is now showing plenty of life. This changing weather pattern will result in milder conditions across the northeastern states and some much-needed precipitation across the western and southern states after an extended dry stretch. The rejuvenated sub-tropical jet stream is pouring moisture today into southern California while an intensifying surface low pressure spins just off the San Francisco coastline. This system will produce some rain in low lying areas of the Golden State during the next 24 hours or so and significant accumulating snow in the mountains of eastern California.

By the early part of the weekend, this same low-pressure system will re-emerge over the south-central states and Gulf moisture will feed into its southeastern flank. As such, the moisture field will expand - good news for the Deep South where it has been dry - and the risk of severe weather will likely be put back in play in some areas. This system will then move in a general eastward direction and it can have an impact on the Mid-Atlantic region by the latter part of the weekend with mixed precipitation on the table. Much milder weather will follow in Mid-Atlantic/Northeast US later next week after the passage of this storm system off the eastern seaboard.  

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6:00 AM | *An increasing chance of showers for the PM hours*

Paul Dorian

There will be an increasing chance for showers today as weak low pressure moves in this direction from the middle of the country, but the remainder of the week should be rain-free across the Tennessee Valley. In fact, the dry weather pattern setting up at mid-week can last all the way into the early part of next week and it will be accompanied by mild conditions on Friday, Saturday and Sunday.

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****Bitter cold this weekend with a direct discharge of Arctic air from eastern Canada...snow showers and possible squalls with Arctic front...powerful winds on both weekend days****

Paul Dorian

Punxsutawney Phil saw his shadow this morning suggesting there will be six more weeks of winter, and I certainly have faith in all Pennsylvania prognosticators. One thing is for sure...the next 7 days will feature more in the way of well below-normal temperatures, and the upcoming weekend will be bitterly cold across the Mid-Atlantic/Northeast US with a direct discharge of Arctic air from eastern Canada. The Arctic front at the leading edge of this brutally cold air mass can produce snow showers and squalls on Friday, and powerful winds will add to the misery on both weekend days. The big cities from DC-to-Boston will likely experience single digit lows once again during the weekend and wind chills will be at dangerously low levels on both days.

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****Bitter cold extends all the way to southern Florida... explosive cyclogenesis this weekend...biggest impacts to the south and east of the DC-to-Philly-to-NYC corridor****

Paul Dorian

The bitter cold weather pattern continues across the eastern states during the next few days with significant impacts reaching all the way down to southern Florida. In fact, the temperature will drop to near freezing in Miami by Sunday morning and zero-degree overnight lows are on the table during the next couple of nights in the Mid-Atlantic’s I-95 corridor. In addition to the cold, there will be explosive cyclogenesis this weekend near the east coast with biggest impacts from storm system likely to be across portions of Virginia, the Carolinas, and eastern New England as well. The I-95 region from DC-to-Philly-to-NYC will not go unscathed with a noticeable increase in winds from later Saturday into Sunday and there can be some snow with small accumulations on the table.

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