High pressure that has been in control of our weather for much of this week has now shifted off the coast and this repositioning will open the door to more humid air and the return of shower and thunderstorm activity. The shower and thunderstorm activity can begin late tonight and should continue on an occasional basis on both weekend days and some of the rain can be heavy at times. Temperatures will climb to quite warm levels later this afternoon with highs in the upper 80's, but they should be confined to the middle 80’s on Saturday and Sunday largely as a result of the expected copious amounts of clouds. A cold front that will be trailing low pressure to our north this weekend will push through here later Monday and it’ll usher in a beautiful air mass for Tuesday and Wednesday of next week with comfortable temperatures and humidity levels.
Elsewhere, Hurricane Ernesto will impact Bermuda on Saturday and then likely maintain hurricane strength for awhile later in the weekend as it pushes towards the Atlantic Canada. While the center of Ernesto will be well to the east this weekend, there can be rough surf and rip tides up and down the east coast on both weekend days.
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High pressure will shift offshore from later tonight into Friday and this repositioning will open the door to influence here this weekend by a low pressure system and its associated frontal systems. As a result, the chance of showers and thunderstorms will increase late tomorrow night and rain will be a threat on both weekend days…some of the weekend rain can be heavy at times. The cold front trailing from the low pressure system will push across the region from Sunday night into Monday likely resulting in additional showers and thunderstorms and, at the same time, Hurricane Ernesto will pass by well to our east producing rough surf/rip tides in the Atlantic. A very comfortable air mass arrives in the Mid-Atlantic region in time for Tuesday and Wednesday of next week.
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High pressure is to remain in control of the weather around here for the next couple of days with relatively comfortable temperatures and humidity levels and also plenty of sunshine on a daily basis. The weather becomes much more unsettled by the end of the week as low pressure and its associated frontal systems raise the chance here for showers and thunderstorms on Friday night, Saturday, and Sunday.
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High pressure is to remain in control of the weather around here for the next few days with overall comfortable conditions and plenty of sunshine on a daily basis. The weather becomes much more unsettled by the weekend as low pressure and its associated frontal systems raise the chances for showers and thunderstorms to return to the Mid-Atlantic region.
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The weekend just past in the Mid-Atlantic region was quite comfortable with plenty of sunshine on both days and the remainder of the week ahead looks quite comfortable as well for the middle of August. In fact, the rest of August may very well turn out to be quite comfortable across the Mid-Atlantic region with no signs of sustained extreme heat pretty much anywhere in the eastern half of the nation.
While the weather is quiet in the Mid-Atlantic region for much of this week, the tropical scene in the Atlantic Basin is active and it is likely to stay quite active during the remainder of August. A strong tropical wave that is currently closing in on the Leeward Islands is very likely to become a named tropical storm (Ernesto) during the next 24 hours and then it’ll impact Puerto Rico by mid-week – perhaps as a category 1 hurricane – and then likely move towards the island of Bermuda as an even stronger hurricane. A second tropical wave follows close behind and is currently located over the central tropical Atlantic and a third can be seen on satellite imagery near the west coast of Africa.
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After a nice weekend in the Mid-Atlantic region, the weather for much of the upcoming week will remain on the quiet, comfortably warm side with high pressure to our northwest staying in control. Temperatures can peak this afternoon in the low-to-mid 80’s and then climb a bit to the middle 80’s for highs for the mid and late week time periods.
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A tropical depression will pass to the west of here by mid-day bringing additional heavy showers, embedded thunderstorms, more flooding potential, and strong winds through the evening hours…isolated tornadoes are also on the table. Scattered power outages are possible given the combination of saturated grounds and wind gusts potentially up to 45 mph or so. The heaviest rain last night set up across the western (Virginia) suburbs of the metro region where as much as 3-5 inches of rain was reported in some spots and the highest flooding potential today will be much the same region. The tropical system will continue its acceleration to the north-northeast that began late yesterday and, as such, will clear out of here by late tonight leading to big improvement on Saturday and also nice weather on Sunday. In fact, the nice weather that begins here early this weekend should continue right into the middle part of next week.
On another note, the annual Perseid meteor shower will peak late this Sunday night and early Monday morning and weather conditions should be quite favorable for viewing. For more details on the meteor shower, check out the blog here.
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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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After spending yesterday out over the open waters of the southwestern Atlantic, Tropical Storm Debby has made a second landfall early today just to the northeast of Charleston, South Carolina and it will begin to accelerate to the north later tonight and pass to the west of the Mid-Atlantic’s I-95 corridor on Friday. Outer bands associated with the tropical storm have already reached our region and the main impact here will occur from tonight through Friday evening. There will be occasional heavy downpours, embedded strong thunderstorms, gusty winds, and even isolated tornadoes during the tropical storm’s main impact time period. As the remnants of the tropical system accelerate to the northeast, skies will clear here by early Saturday and the weekend should turn out to be quite nice. In fact, the period from Saturday through the middle of next week looks quite nice throughout the northeastern quadrant of the nation with comfortable temperatures and humidity levels.
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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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