7:00 AM | *Powerful coastal storm to generate significant accumulating snow around here tomorrow night after slippery early morning commute*

6-Day Forecast

Today

Mostly cloudy and quite cold, highs in the low-to-mid 30’s

Tonight

Cloudy, snow late possibly mixed with ice and/or freezing rain, lows in the upper 20's

Friday

Cloudy with precipitation becoming all rain, early morning commute could have slippery spots, breezy, highs near 40

Friday Night

Rain changing to accumulating snow early, becoming windy with gusts to 40+ mph, accumulations of 2-6 inches, cold, lows in the mid 20’s

Saturday

Becoming mostly sunny, windy and cold, low-to-mid 30’s

Sunday

Mostly sunny, not quite as cold, near 40

Monday

Mostly cloudy, milder, chance for rain showers, mid-to-upper 40’s

Tuesday

Partly sunny, mild, mid 40’s

Discussion

It continues to look like a massive snowstorm for much of New England with two feet or more of snow possible in Boston by early Saturday morning. In fact, it looks like an all-out blizzard for much of Connecticut, Rhode Island, Massachusetts, southern Maine, southeastern New Hampshire and parts of New York State with major snowfalls of 1-2+ feet, strong winds (60+ mph) and even thundersnows. Just down the coast a bit, the NYC metro region is right on the edge for an all-out blizzard as well for tomorrow night with substantial accumulations expected there of at least 6-12 inches and wind gusts at 50+ mph.

In Philly, the overall scenario looks like this: a mixed bag of precipitation at the onset late tonight/early tomorrow and then plain rain during the day, and then rain changes to snow by late afternoon or early evening as the storm intensifies rapidly and draws in colder air. Slippery conditions are likely around here between about 4 and 9am before the changeover to plain rain occurs later tomorrow morning. Accumulations tomorrow night of 2-6 inches are likely in the Philly metro region along with 40+ mph wind gusts. The higher snow accumulation amounts will be to the north and east (e.g. Bucks County) and lowest amounts to the south and west (e.g. southern Chester County). Farther south, odds favor mainly rain in the DC metro region, but even there it can start as a mixed bag late tonight before changing to plain rain on Friday and a changeover to snow at the end of the storm cannot be ruled out in the Baltimore/Washington corridor.

This is a very dynamic storm and small changes can mean big differences so stay tuned to thesiweather.com.

Video

httpv://youtu.be/7Vr9LPvNkFA