At 4:00 pm the National Weather service in My Holly/ Philadelphia issued an alert for
Potential Big Changes to Monday's Forecast.
We wanted to give you a quick update on the forecast as our latest computer guidance indicates significant changes could be in store. This could mean a much snowier forecast farther south for Monday including the Philadelphia Metro area. Here are the key points:
1) This afternoon through this evening, mainly rain will continue near and south of the I-95 corridor with mixed precipitation (sleet, freezing rain, and some snow)
gradually changing to rain from south to north. However the southern Poconos and far northern New Jersey (Sussex County) should remain below freezing and continue to see mainly sleet and freezing rain. In fact ice amounts here may be higher than previously forecast...potentially up to a half inch of ice accretion.
2) Overnight Sunday night, precipitation will gradually change to all snow from northwest to southeast with the rain/snow line likely just north/west of the I-95 corridor by 7 AM Monday.
3) For Monday, this is when we could see potentially large changes to the forecast. Rain changes to snow through the morning for the I-95 corridor and the latest indications are there could be a band of moderate to heavy snow that sets up late morning through the afternoon for parts of eastern PA into northern/central New Jersey. This could include the Philadelphia metro area. This band may not be very wide but could put down 1-2 inch per hour snowfall rates for a time resulting in 4-6+ inches of snowfall accumulation for impacted areas. This could have significant impacts on the Monday afternoon/evening commute. Snow will wind down Monday night.
At this hour, we are continuing to analyze this new data and update the forecast.
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