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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Many ingredients are coming together for a very active Arctic frontal passage this weekend that will include rain transitioning to accumulating snow/sleet on Saturday and high winds and very cold conditions on Saturday night and Sunday. The rain will begin late tonight and continue for awhile on Saturday morning and then transition to snow in the late morning following the passage of the Arctic front. This transition to snow may include some sleet and will will progress from west-to-east across the Mid-Atlantic region. Wind gusts of 50+ mph are possible later Saturday and Saturday night and that kind of intensity raises the possibility of downed tree limbs and power outages in the Mid-Atlantic region. 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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Many ingredients are going to come together for an extreme wind event in the Mid-Atlantic region and Northeast US from later Saturday into Saturday night. In addition to the expected high winds, snowfall on the back side of an Arctic cold front will be significant across interior sections of the northeastern quadrant of the nation. There can even be some accumulating snow all the way down into the DC-to-Philly-to-NYC corridor and perhaps to coastal sections of the eastern US. Wind gusts of 50-60 mph are possible later Saturday and Saturday night and that kind of intensity raises the possibility of downed tree limbs and power outages in the Mid-Atlantic/Northeast US. 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 with highs generally confined to the 30’s in the I-95 corridor.
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After yesterday’s mix of cold rain and wet snow in the Philly metro region, today and tomorrow will be relatively tranquil as high pressure builds across the Mid-Atlantic region. It will, however, turn quite active again as we begin the upcoming weekend with an Arctic cold front advancing into the eastern US. This cold frontal system will have a lots of support in the upper atmosphere which will help to contribute to the formation of surface low pressure along the frontal boundary zone and this system will intensify rapidly as it pushes northeastward. Rain is likely here ahead of the Arctic front from Friday night into early Saturday and some of it can be heavy at times and a strong thunderstorm is also possible. On the back side of the front later Saturday, temperatures will drop sharply, the rain will change over to accumulating snow across interior sections of the Mid-Atlantic and perhaps all the way into the N/W suburbs along the I-95 corridor. The biggest story with this early weekend weather event will be the winds which can gust into the 50-60 mph range later Saturday into Saturday night. A very tight pressure gradient will form between the departing strong storm system and a high pressure in the southern states. High winds of this nature raises the possibility of downed tree limbs and power outages in the Mid-Atlantic/NE US from later Saturday into Saturday night.
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After today’s mix of snow and rain in areas to the north of the PA/MD border and cold rain to its south, the Mid-Atlantic will enjoy relatively tranquil conditions on Thursday and Friday as high pressure builds across the region. It will, however, turn quite active again as we begin the upcoming weekend with an Arctic cold front advancing into the eastern states. This cold frontal system will have a lots of support in the upper atmosphere which will help to contribute to the formation of surface low pressure along the frontal boundary zone and this system will intensify rapidly as it pushes northeastward.
Rain is likely ahead of the Arctic front in the Mid-Atlantic region from Friday night into early Saturday and some of it can be heavy at times and a strong thunderstorm is also possible. On the back side of the front, temperatures will drop sharply, the rain will change over to accumulating snow across interior sections of the Mid-Atlantic and perhaps all the way into the I-95 corridor. In addition, high winds are likely to develop from later Saturday into Saturday night as a strong pressure gradient forms between the departing storm system and a strong high pressure in the southern states.
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A messy day is in store for the region with a snow/rain combination and sleet can join the mix at times. Precipitation will overspread the area this morning and temperatures will drop from early day highs in the lower 40’s into the middle 30’s and they should remain there for the remainder of the day. Small accumulations of snow are possible of a coating to an inch or two; primarily, on grassy surfaces in suburban locations to the north and west. However, in some of the higher elevation locations to the far north and west (e.g., western Chester, western Montgomery and Upper Bucks) perhaps 2 or 3 inches can accumulate on grassy surfaces. Low pressure will push from the Tennessee Valley early today to southeastern Virginia and then to a position out over the open waters of the western Atlantic Ocean by later in the afternoon.
Looking ahead, it looks like there will be a very active cold frontal passage early this weekend. That next strong cold front will come with pre-frontal rains and possible strong thunderstorms and post-frontal extreme winds are likely as is a changeover to accumulating snow across interior sections of the Mid-Atlantic/NE US. In fact, there is the possibility for some post-frontal accumulating snow all the way down into the I-95 corridor and even as far east as coastal sections of the northeastern quadrant of the nation. Very cold air for this time of year will envelope the entire region for the Saturday night/Sunday time period.
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