Added Mar 18 2018

Good morning! We are continuing to monitor a coastal storm system that will likely affect the area beginning Monday night and potentially last right through Wednesday. While there is still a lot of uncertainty in the details of this system, indications are it may come in two separate waves, the first arriving Monday night into Tuesday morning and the second arriving Tuesday night into Wednesday. The track and evolution of the system will determine precipitation types and amounts as temperatures will be marginally cold. However the system does have the potential to bring heavy wet snow, strong winds, and even the possibility of some coastal flooding. Below are the highlights: *Snowfall: Highest threat for several inches of accumulating snowfall with the first wave currently looks to be near and north of the Mason-Dixon line -> southeast Pennsylvania extending into central and southern New Jersey south into northern parts of the Delmarva. *Winds: Strongest winds along Atlantic coastal sections of New Jersey and Delaware where NE winds may reach 20 to 30 mph with gusts over 40 mph. *Timing: First wave arrives Monday night lasting through Tuesday morning with mainly wet snow near and north of the Mason - Dixon line and mainly rain farther south over the southern Delmarva. There may be a brief break before a second wave potentially affects the area Tuesday night into Wednesday with more snow possible. *Impacts: Heavy wet snow could result in reduced visibility, slippery travel due to snow covered roads, and power outages if enough accumulates on tree limbs and wires. Biggest impacts currently look to be for the Tuesday morning commute and possibly again for Wednesday. *Confidence of occurrence: Moderate confidence storm will impact parts of the area with at least some snow Monday night into Tuesday but low confidence on amounts. Low confidence on second part of system potentially arriving for Tuesday night into Wednesday. The attached graphics show expected snowfall for the period Monday night through Wednesday. For further details regarding snowfall probabilities please visit: Note: Our snowfall forecasts will extend through Wednesday with the next forecast package this afternoon. *For forecast details specific to your location, please visit and enter your city or zip code in the upper left.

Posted to South Philadelphia

This was posted to South Philadelphia

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