After a relatively mild day today, the weekend will turn progressively colder and NW winds will increase in strength following the passage of two cold frontal systems. With the arrival of the initial cold front on Saturday, the atmosphere will become very unstable and there is a good chance for some rain shower activity and maybe a rumble or two of thunder. It is also possible that ice pellets mix in with the rain at times as the colder air filters into the region. Temperatures on Sunday will be confined to the 40’s for afternoon highs and well below-freezing conditions are likely late Sunday night and again late Monday night. It stays colder-than-normal on Tuesday and will have to watch for the threat for some rain, ice and/or snow at night or on Wednesday as warmer air tries to return.
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Occasional rain or drizzle will continue through tonight as a secondary low pressure system forms near the northern Mid-Atlantic coastline and a thunderstorm cannot be ruled out. After a relatively mild day on Friday, the weekend will turn increasingly cold and NW winds will intensify following the passage of two cold frontal systems. With the arrival of the initial cold front on Saturday, there can be a few rain showers and perhaps even a bit of sleet or graupel (i.e., snow pellets) mixed in at times late in the day. Temperatures on Sunday will be confined to the 40’s for afternoon highs and below-freezing conditions are very likely late Sunday night and again late Monday night. In fact, it stays quite a bit colder-than-normal for the latter part of March right into the middle part of next week.
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The calendar says its spring, but as has been the case in many recent years, winter will not go away without a fight. A cold blast will arrive in the Mid-Atlantic/Northeast US on Saturday and by the time we get to the early part of next week, temperatures will be far below-normal for the latter part of March. In fact, this cold air outbreak will likely bring temperatures to below the freezing mark in most areas in the overnight hours early next week making outdoor sensitive plants quite vulnerable to damage. In addition to the cold, the chance for snow (or other forms of frozen precipitation) will return this weekend to the Mid-Atlantic/Northeast US and there may be other threats coming this way later next week.
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One low pressure system will push to our northwest during the next 24-36 hours and a second one will form off the Mid-Atlantic coastline. The result around here will be periods of rain from later this afternoon into early Friday and a strong thunderstorm or two can be mixed into the picture. Looking ahead, an impressive cold blast will arrive in the Mid-Atlantic region this weekend and highs on Sunday threaten to stay in the 40’s raising the possibility of below-freezing readings by early Monday morning in many suburban locations and again early Tuesday morning (i.e., watch out for sensitive outdoor plants).
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Spring has sprung, but that is not quite the end of the cold air outbreaks for the Mid-Atlantic region and the Northeast US. In addition, snow cannot be ruled out for interior sections this weekend with the influx of cold air and perhaps there will be another snow threat early-to-mid next week.
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Rain is headed to the Mid-Atlantic region for the period from later tomorrow into early Friday as one low pressure system pushes to our northwest and a secondary forms off the coastline. High pressure will remain in control here for today, but clouds will increase later tonight and rain is likely to develop during the PM hours on Wednesday. Looking ahead, an impressive cold blast will arrive in the Mid-Atlantic region this weekend with highs on Sunday likely confined to the 40’s and a chance to go below freezing on Sunday night.
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There is a rocket launch scheduled for tonight at the NASA/Wallops Island facility and it may be visible to residents in the Mid-Atlantic region. A two-stage suborbital sounding rocket is scheduled to be launched in the window between 7 and 10 PM for a mission managed by the Air Force Research Laboratory. The purpose of this mission is to increase the understanding of the boundary layer transition, turbulent heating and drag on vehicles flying at hypersonic conditions.
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The biggest weather story of the work week in the Mid-Atlantic region will be a rain event from later Wednesday into at least Thursday night and then a cold blast of air will arrive this weekend. High pressure will be in control from today into tomorrow and then low pressure will move to the northwest of here from later Wednesday into Thursday resulting in occasional rain across the area. In addition, a secondary low will form off the coastline extending the rain event into Thursday night or perhaps even early Friday. A strong cold front will arrive here this weekend ushering in a pretty cold air mass for the latter part of March.
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The work week will end on a very nice note with the return of sunshine after early day fog as high pressure edges into the region. After a noticeably cooler day on Thursday, temperatures will be boosted by the sunshine later today and climb into the lower 70’s during the afternoon. Low pressure will slide north of the region from later tonight into Saturday bringing with it the return of showers here and perhaps a couple of thunderstorms mixed in as well. Following a cold frontal passage, cooler air will push in for the second half of the weekend with highs on Sunday likely confined to the 50’s.
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Low pressure will head to just off the New Jersey coastline by later today bringing us more rain and noticeably cooler conditions than yesterday. Skies will clear some later tonight setting the stage for a very nice day on Friday to close out the work week. With the return of sunshine on Friday, temperatures will climb back to near the 70 degree mark. Showers return for late Friday night and Saturday - perhaps a thunderstorm as well - signaling the arrival of a cooler air mass for the second half of the weekend.
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