A very comfortable air mass from Canada is moving south and east and will result in some pleasant weather around here for the next few days. Temperatures should peak this afternoon in the mid-to-upper 80’s and then be confined to the middle 80’s for highs on Tuesday and Wednesday and humidity levels will be low.
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High pressure slid to our east on Thursday and this change in position has resulted in an influx of warm, humid air and the overall weather will become more unsettled for the next few days. In fact, the chance of showers and thunderstorms that increases today will stick around all weekend long with temperatures trending downward a bit with tomorrow’s highs near 90 and then the mid-to-upper 80’s for Sunday. A more comfortable air mass arrives for the early and middle portions of next week following the passage of a cool frontal system.
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High pressure slides to our east here today and this change in position will result in warmer, more humid, and unsettled conditions for the next few days with a daily chance of showers and thunderstorms. In addition to the ridge moving to the east, an upper-level trough has pushed into the center of the nation and the southerly flow between the two systems is increasing our overall humidity levels across the Tennessee Valley region.
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High pressure ridging will slide to our east here at mid-week and this change in position will result in increasing heat, moisture, and an increase in the chance for PM showers and thunderstorms. In addition to the ridge moving to the east, an upper-level trough will push in the center of the nation and the southerly flow between the two systems will enhance moisture levels across the Tennessee Valley region.
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Today will feature plenty of sunshine across northern Alabama and very warm conditions with afternoon highs near the 90-degree mark. After a similar type of day on Wednesday, the weather becomes more unsettled on Thursday with an increasing chance of showers and thunderstorms as moist air pushes northward into the region ahead of a central Plains upper-level trough.
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The week will start off rather quiet across the Tennessee Valley with plenty of sunshine on each day and very warm conditions. The weather becomes more unsettled by mid-week with an increasing chance of showers and thunderstorms as moist air pushes northward into the region ahead of a central Plains upper-level trough.
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The overall weather pattern will be rather quiet in coming days with moderately warm and generally rain-free conditions across the Tennessee Valley. As tropical depression (Debby) pulls away and into the Mid-Atlantic region, a northerly flow in our area will promote mostly sunny skies today and moderately warm temperatures. The weekend should feature highs confined to the 80’s and it stays rain-free with sunny skies on both days.
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Tropical Storm Debby made a second landfall earlier today about 25 miles to the northeast of Charleston, South Carolina and has begun the normal weakening phase as it pushes farther inland. Despite the weakening, the remnants of Tropical Storm Debby will continue to pound away today at the Carolinas with additional heavy rainfall as copious amounts of tropical moisture still feed into the system from the southwestern Atlantic. Some spots in South Carolina can end up with 25 inches of rain when all is said and done and up to 15 inches in likely in portions of North Carolina.
In the Mid-Atlantic region, outer bands have already produced occasional showers and the main impact will come from late today into Friday evening as the tropical depression passes over the front range of the Appalachians. The impact in the I-95 corridor will include occasional heavy downpours, embedded thunderstorms, strong winds, and isolated tornadoes are even on the table. Scattered power outages are also on the table given the combination of saturated grounds and wind gusts potentially up to 45 mph or so. The heaviest rainfall during this upcoming event will likely come along the front range of the Appalachians (e.g., eastern West Virginia, western Virginia, central Pennsylvania) where southeasterly winds will be “lifted” by the increasing altitude.
Looking ahead, the “soon-to-come” acceleration of the tropical system will allow for a nice weekend in the Mid-Atlantic region and the overall weather pattern looks quite nice from Saturday through the middle of next week all across the Great Lakes, Midwest, Mid-Atlantic, and Northeast US (and it should be favorable for the Perseid meteor shower). One final note, there are signs that there may be another tropical threat to deal with in the eastern US by around the middle of the month.
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The weather remains quite warm today, but there will be an overall downward trend in temperatures going into the upcoming weekend. As far as precipitation is concerned, it appears to be mainly – if not completely – rain-free over the next several days with high pressure generally in control across the Tennessee Valley.
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Tropical Storm Debby is out over the very warm waters of the southwestern Atlantic Ocean and it has strengthened some today with maximum sustained winds now at 60 mph. Tropical Storm Debby will make a second landfall by early tomorrow morning and then begin a turn to the north that should bring it’s remnants just to the west of the Mid-Atlantic’s I-95 corridor on Friday afternoon. As such, there is the threat of some heavy rainfall, strong thunderstorms, gusty winds in the Mid-Atlantic region from late Thursday through Friday night and isolated tornadoes are on the table. The tropical system will accelerate to the northeast by Saturday with improving conditions in the Mid-Atlantic region and we’re setting up for a stretch of nice weather from Sunday through Tuesday all across the northeastern part of the nation.
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