It’ll be colder-than-normal today to end the work week despite plenty of sunshine and then slightly milder on Saturday to begin the weekend. A storm system will trek across the southern states this weekend and it can produce some snow around here from later Sunday into Sunday night or perhaps a mixture of snow, ice and rain…small accumulations are possible. Following the passage of that storm system, milder air should reach our area by the middle of next week and temperatures can climb to near 50 degrees for afternoon highs.
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A low pressure system that produced some beneficial rain and snow across California on Wednesday will ride along the newly activated sub-tropical jet stream and re-emerge over the south-central states early this weekend. Warm and humid air will flow northward into this system from the Gulf, and this will help to intensify and expand the storm’s precipitation shield...all good news for the Deep South where it has been quite dry in recent weeks. The influx of warm and humid air will also help to destabilize the atmosphere, leading to a severe weather threat by later Saturday and Saturday night in portions of the south-central US. This system will then push eastward and head towards the eastern seaboard on Sunday potentially bringing some mixed precipitation to the Mid-Atlantic region which will be on the northern fringes of its moisture field. Much milder weather will follow across the northeastern states by the middle of next week.
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A cold front passed through the area on Wednesday and its passage will result in moderately cold conditions for the remainder of the week. The winds that intensified following the frontal passage will remain quite noticeable today with gusts from the northwest of up to 30 mph. Looking ahead, a storm system will trek across the southern states this weekend and it can impact the Philly metro region with a mix of rain and snow rain from later Sunday into Sunday night. Following the passage of that system, a noticeably milder weather pattern will kick into gear across the northeastern part of the country for the bulk of next week.
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The polar jet has dominated the scene in recent weeks across North America resulting in numerous Arctic air masses being transported from western Canada into the northeastern states, but changes are underway as the sub-tropical jet is now showing plenty of life. This changing weather pattern will result in milder conditions across the northeastern states and some much-needed precipitation across the western and southern states after an extended dry stretch. The rejuvenated sub-tropical jet stream is pouring moisture today into southern California while an intensifying surface low pressure spins just off the San Francisco coastline. This system will produce some rain in low lying areas of the Golden State during the next 24 hours or so and significant accumulating snow in the mountains of eastern California.
By the early part of the weekend, this same low-pressure system will re-emerge over the south-central states and Gulf moisture will feed into its southeastern flank. As such, the moisture field will expand - good news for the Deep South where it has been dry - and the risk of severe weather will likely be put back in play in some areas. This system will then move in a general eastward direction and it can have an impact on the Mid-Atlantic region by the latter part of the weekend with mixed precipitation on the table. Much milder weather will follow in Mid-Atlantic/Northeast US later next week after the passage of this storm system off the eastern seaboard.
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A cold front will pass through the area later today and its passage will ensure moderately cold conditions for the remainder of the week and weekend. In addition, the winds will pick up today with gusts to 30 mph or so and it’ll stay quite breezy on Thursday as well to go along with the moderately cold conditions. Looking ahead, a storm system will trek across the southern states this weekend and it can impact the Mid-Atlantic region from later Sunday into Monday…potentially with a mixed bag of precipitation and accumulating snow is still on the table. Following the passage of that storm system, a milder weather pattern will kick into gear next week across the northeastern part of the country. One final note, yesterday marked the 16th day in a row with 5” or more at PHL…longest stretch like that since 2010.
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Temperatures will modify some today in the Mid-Atlantic region with the approach of a warm front and there can be a bit of snow, ice and/or rain at times. Right on its heels, a cold front will pass through the area on Wednesday and its passage will ensure moderately cold conditions for the remainder of the week and weekend. In addition, the winds will pick up at mid-week with gusts to 30 mph or so and it’ll stay quite breezy on Thursday to go along with the moderately cold conditions. The weekend will likely present another storm system for the Mid-Atlantic region and it could feature a mixed bag of rain, sleet and/or snow during the second half.
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The polar jet has dominated the scene in recent weeks typically extending all the way from western Canada into the northeastern US, but the sub-tropical jet is starting to show some life. This change in the overall weather pattern raises the prospects for moderation in temperatures across the northeastern states, some well-needed precipitation across many of the western states, and for the formation of storm systems that take a southern route across the southern states. By mid-week, a storm will head into California with some rainfall in low-lying areas and snow for mountainous areas, and then this low pressure system will re-emerge over the south-central states by the early part of the weekend...all of which will be aided by an activated sub-tropical jet stream.
The southern storm system will take a turn to the northeast later in the weekend and head towards the Ohio Valley, but it will become increasingly influenced by strong ridging centered over the Hudson Bay region of Canada. As such, the northward progression of the surface low will grind to a halt over the Ohio Valley and the action will shift to the east so that by the end of the weekend, strong low pressure is liable to be located somewhere near the eastern seaboard. Temperatures may be borderline later this weekend in the I-95 corridor so this region could become a “battle zone” with respect to precipitation type with snow favored to the north and west and rain to the south and east.
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After a bitter cold weekend, the new work week starts off with plenty of Arctic cold in the Mid-Atlantic region with numerous single digit temperatures being observed. Temperatures modify on Tuesday and then a cold front arrives at mid-week assuring cold weather for the second half of the week, but not the extreme cold just experienced. The weekend will bring another storm threat to monitor with the possibility of mixed precipitation during the second half.
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Intense cold this weekend with powerful and potentially damaging winds…
The combination of a clipper low pressure system and its associated cold front will produce snow showers in the area late today and tonight and there can be brief heavier snow bursts. Small accumulations are likely on the order of a coating to an inch and there can be slippery spots on the roadways. After the passage of the cold front, an Arctic air mass will plunge into the Mid-Atlantic region from eastern Canada leading to a bitter cold weekend. This Arctic air mass is the real deal, had its origins on the Siberian side of the North Pole, and will not have the usual modifying effects of crossing over the relatively warm Great Lakes. In addition to the bitter cold, biting winds will become a major factor on both weekend days with gusts of up to 55 mph producing dangerously low wind chill levels of well below zero and raising the possibility of power outages in some areas.
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An Arctic air mass will plunge into the Mid-Atlantic and Northeast US this weekend moving almost directly southward from the frozen tundra region of eastern Canada. Actually, this incoming Arctic air mass had its origins several days ago on the other side of the North Pole and was transported into North America from Siberia in a “cross-polar” overall wind pattern. The cold front at the leading edge of this bitter cold air mass will be quite active with strong support in the upper part of the atmosphere. As a result, numerous snow showers are likely on Friday night, and there can be bursts of heavier snow mixing into the picture...small accumulations and slick spots on the roadways are on the table. In addition to the bitter cold this weekend, biting and potentially damaging winds will become a major factor with gusts to 50+ mph raising the prospects for power outages in some areas. The combination of bitter cold air and powerful winds will result in dangerously low wind chill levels from later Saturday to early Sunday with apparent temperatures well below zero at times in many areas.
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