High pressure will build across the region over the next couple of days and all eyes will be on what is now a category 1 hurricane named “Debby” which is about to make landfall in the Big Bend region of Florida’s Gulf coast. Tropical moisture associated with Debby can enhance the chance of heavy rain around here as early as late tomorrow and tomorrow night and the threat of tropical rains will continue here for much of the second half of the week due to the slow-movement of this system. The week starts off with very warm and humid conditions today and Tuesday, but then it’ll turn much cooler on Wednesday and Thursday with the interaction of what remains of Hurricane Debby.
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An intensifying upper-level trough of low pressure will slide towards the Mid-Atlantic region from later today into tonight and it’ll actually play a role in the weather around here right through the upcoming weekend. Specifically, this system will enhance upward motion in the area raising the chance of showers and thunderstorms - possibly strong-to-severe - and that threat of rain will continue on each weekend day. In addition, a southwesterly flow of air out ahead of this incoming trough will push very moist air into the area suggesting any shower or thunderstorm that does form during the next few days can produce some very heavy rainfall amounts in an impacted location.
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An upper-level ridge builds into the Mid-Atlantic region for the next couple of days and this will lead to hotter conditions with afternoon highs well up in the 90’s in most spots along the I-95 corridor. A few shortwaves will keep it unsettled around here right through the upcoming weekend with rounds of showers and thunderstorms; primarily, focused on the afternoon and evening hours. Any thunderstorm that forms during the next few days can produce heavy rainfall amounts given the high amounts of available moisture and the likely slow-moving nature of the storm cells. Elsewhere, the tropical scene is alive and well in the Atlantic Basin as we flip the calendar to August and there could be an intensifying tropical system to deal with over the eastern Gulf of Mexico by early next week.
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Low pressure will pass by to our north today and there can be isolated showers and thunderstorms during the afternoon, but much of today will be rain-free. An upper-level ridge of high pressure is building into the region and this will result in hotter weather conditions beginning today and continuing through Friday with afternoon highs likely well up in the 90’s on each day. The overall pattern remains unsettled as well on Thursday and Friday with a chance of PM showers and thunderstorms and warm, humid and unsettled conditions are likely this weekend.
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A couple of shortwaves will rotate through the region later today and tonight raising the chance of PM showers and thunderstorms…some of the storms can be strong and produce heavy rainfall amounts. There should be plenty of cloud cover around as well today which should limit high temperatures this afternoon to the middle or upper 80’s in the DC metro region. Upper-level high pressure ridging to our southwest will take control for the second half of the week and it’ll remain somewhat unsettled. As such, it’ll turn hotter for Wednesday, Thursday and Friday with afternoon high temperatures likely well up in the 90’s and there can be scattered showers and thunderstorms.
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The weather was rather tranquil this weekend with dry and quite warm conditions, but it turns unsettled again by tonight and it’ll remain so for much of the week. Low pressure is spinning over New England this morning and there is a chance for an isolated shower that makes it all the way down into the southern Mid-Atlantic region. Another low pressure system will push to our north from tomorrow into Wednesday and it will raise the chance of additional showers and thunderstorms around here. Temperatures will be high this week with many days featuring highs in the lower or middle 90’s.
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A cold front passed through the region in the overnight hours and high pressure will build eastward from the Great Lakes assuring dry conditions for the weekend. In addition, the high humidity of recent days will become noticeably lower today and temperatures for the next few days should generally be at seasonably warm levels.
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After one more warm, humid, and unsettled day in the Mid-Atlantic region, high pressure centered over the Great Lakes will take control of our weather on Friday and provide us with dry and comfortably warm conditions through the weekend. As far as today is concerned, there will again be plenty of clouds around and the threat of additional showers…maybe a thunderstorm. Temperatures should peak this afternoon in the middle 80’s and overall humidity levels should drop by tomorrow as high pressure to our northwest edges into the region.
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High pressure centered over the western Atlantic Ocean continues to pump in warm, moist air to the Mid-Atlantic region and a series of weak fronts will keep it unsettled around here for the next couple of days. The combination of the high humidity and the weak disturbances will result in a chance of showers and thunderstorms right through tomorrow night and some of the rain can be heavy at times. High pressure building over the Great Lakes by week’s end should be strong enough to eliminate the chance of rain around here on Friday, Saturday, and Sunday and temperatures should be pretty close to seasonal norms.
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What a difference a week makes...a week ago the Mid-Atlantic region was experiencing high heat with triple digit highs in some spots and significant rainfall was hard to come by. Severe thunderstorms then took place last Tuesday and Wednesday causing numerous power outages in the Mid-Atlantic region...all part of a transition in the overall pattern that resulted in an influx of cooler air on Thursday. Since then, and for the rest of this week, temperatures will be much closer to seasonal norms with afternoon highs generally in the 80’s and no triple digit heat is in sight for the I-95 corridor. In terms of rainfall, weak winds in the lower and middle atmosphere are contributing to slow movement of showers and thunderstorm cells and - given the high amounts of available moisture - this has increased the chance for some heavy rainfall amounts in a given location and this threat will remain with us through Thursday. Beyond that, high pressure over the Great Lakes is likely to bring about a warm and dry period from Friday through Sunday.
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