AccuWeather: 4" to 8" of snow expected Wednesday

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Cecily Tynan with AccuWeather on Action News at 6 p.m., March 19, 2018 (WPVI)

A very complicated weather pattern is becoming more clear: TWO weather systems will impact our area as spring arrives. The first, on Tuesday, will just be a brush. Wednesday has the potential to become a major winter storm.

TONIGHT: Clouds thicken and some rain, sleet and light wet snow is possible by dawn, especially south of Philadelphia. The low is 30.

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TUESDAY: The first of two waves of low pressure arrives, bringing us a mix of rain and wet snow. This is generally a minor event, low pressure brushing us and moving out to sea. Precipitation likely begins after sunrise with a mixture of rain, sleet and snow. There's a warm layer of air about 5,000 feet above the surface, so there could be a fair amount of sleet in the Philadelphia area. But, with a relatively warm ground after today's sunshine and temperatures near 50, there will be a lot of melting, so there shouldn't be many problems on the roads during the day. *Temperatures drop below freezing Tuesday night, so slick spots could develop!* The high is 37.

WEDNESDAY: This will be a second low pressure, one that means business as it get cut off, intensifies and moves up the coast (yes, you can call this the "Four'easter.") After Tuesday's event, colder air will be in place and surface temperatures will drop. The morning begins with a mix of sleet and freezing rain from I-95 on southeast. As the storm intensifies, it pulls in cold air, turning everything to snow by mid to late morning. Road conditions deteriorate quickly into the afternoon. Expect a period of steady to heavy snow right into the evening. Snowfall totals will be 4" to 8 "+ across the region. Very far southern areas like Dover and Cape May see only 2" to 4". Highs touch 35, but falling to near freezing during the heaviest snowfall. Snowfall ends after sunset. It'll be windy, with temps falling into the 20s overnight.

THURSDAY: The storm is gone, but it's brisk and chilly with partly sunny skies and a high around 46.

FRIDAY: Mostly sunny skies appear likely, but our high is still chilly and below average: 46.

SATURDAY: Clouds increase ahead of our next storm system. A rain or snow shower is possible late in the day or at night. The high is 48.

SUNDAY: This looks like a chilly, damp, mostly cloudy day with rain and snow showers possible at times. The high is only 43.

MONDAY: Look for partly sunny skies with another cool high around 48.
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