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Weather forecasting and analysis, space and historic events, climate information

2:00 PM | **Philly metro area could be the "bullseye" region once again for highest snowfall amounts**

Paul Dorian

storm2[Latest satellite image of the powerhouse Pacific Ocean storm; courtesy NASA]

Discussion

Overview The ingredients are coming together for another snowstorm to hit the Philly metro region from later Sunday night into Monday night. In fact, the Philly metro region could turn out to be the “bullseye” region for this storm in terms of highest snowfall – much like it has been for many storms this winter. The official Philly Airport seasonal snowfall totals are now just 6 inches shy of making this the 2nd snowiest winter ever (behind 1995-1996) and only 19 inches away from the all-time snowiest winter set in 2009 -2010.

The first ingredient in this upcoming event is a powerhouse storm system that will slam into California later today with substantial rainfall, thunderstorms, and strong wind gusts. This system will then cross the country over the weekend and its significant supply of moisture will arrive in the Mid-Atlantic region by Sunday night. A second crucial ingredient to the upcoming snowstorm is an extensive area of Arctic high pressure that will set up across the southern tier of Canada by the end of the weekend. One humongous high pressure system will be anchored over south-central Canada by Monday and there will be an extension of this into the southeastern part of Canada.

Preliminary storm details Light precipitation is likely to break out later Sunday in the form of rain, possibly mixed with sleet at times, and temperatures up in the 30’s. Arctic cold air – anchored by strong Canadian high pressure – will slowly filter into the region during Sunday night and the precipitation will gradually change from a wintry mix to all-snow by early Monday and snow should be the predominate type of precipitation from that point on during the remainder of the storm. Temperatures will drop through the 20’s and into the teens on Monday afternoon as the snow accumulates and they will likely bottom out in the single digits by early Tuesday morning. Snowfall estimates at this time for SE PA are on the order of 8-12 inches and there will some icing mixed in; however, a significant ice-buildup is not expected at this time. The snow winds down Monday night and brutal cold conditions will accompany the clean-up efforts on Tuesday and Wednesday.

Updates will be posted this weekend at “thesiweather.com”.

categories PHL