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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With high pressure still situated just off the east coast, the Philly metro region will experience one more pleasant and dry day with plenty of sunshine and afternoon highs in the upper 60’s. Low pressure will head towards the east coast on Thursday bringing with it cooler conditions, plenty of clouds and occasional rain. With the return of sunshine on Friday, temperatures will climb back to near the 70 degree mark for highs, but showers on Friday night and Saturday will signal the arrival of a cooler air mass for the upcoming weekend.
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With high pressure situated just off the coast, the weather around here will remain pretty pleasant for the next couple of days with sunshine each day and mild conditions. Weak low pressure near the Mid-Atlantic coastline on Thursday will bring us plenty of clouds and a good chance of showers. Very mild weather will close out the work week with highs on Friday likely near the 70 degree mark. Showers on Friday night and Saturday will signal the arrival of cooler air for the upcoming weekend.
One final note, you may have noticed some purplish sunsets (and sunrises) in recent days and weeks. This is still the result of the Tonga volcanic eruption that took place back in January. Fine volcanic aerosols in the stratosphere scatter blue light which, when mixed with ordinary sunset red, produces a violet hue. The purple color is often preceded by a yellow arch hugging the horizon. As the sun sets, violet beams emerge from the yellow, overlapping to fill the western sky with a soft purple glow.
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High pressure will control the weather around here for the next few days and it’ll turn much milder compared to the unseasonal chill of the weekend. Low pressure will make a move up the coast on Thursday bringing us a chance of showers with continued mild conditions. The work week ends with temperatures likely climbing to near the 70 degree mark for afternoon highs on Friday, but it cools down some to start the weekend.
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Many ingredients are coming together for a wild weather day in the DC-to-Philly-to-NYC corridor. These ingredients include strong jet streaks at multiple layers of the atmosphere, strong mid-level frontogenesis, and a phasing together of vorticity maxima in the southern and northern branches of the jet stream. Low pressure is now located over southeastern Virginia and it will push along an Arctic frontal boundary zone today while strengthening rapidly. The result will be near blizzard conditions in parts of the I-95 corridor for a period of a few hours with the combination of heavy snow and strong winds. High winds will continue through early Sunday with gusts past 50 mph potentially leading to some downed tree limbs and power outages.
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Many ingredients are going to come together for a very active Arctic cold frontal passage this weekend that will result in rain transitioning to sleet and accumulating snow on Saturday and high winds and very cold conditions for Saturday night and Sunday. There will first be significant accumulations of snow across interior sections of the Mid-Atlantic/NE US on Saturday and then all the way into the immediate DC-to-Philly-to-NYC corridor. Wind gusts of 50+ mph are likely throughout the northeastern quadrant of the nation from later tomorrow through tomorrow night and into early Sunday with downed tree limbs and scattered power outages on the table. The weather will calm down some by later in the day on Sunday, but it’ll remain much colder-than-normal for this time of year and then a warm up begins on Monday.
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