As a decent low pressure system pushes north through the Ohio Valley tomorrow, a southerly flow out ahead of it will provide us with highs of ~25° above average, possibly breaking records. Philadelphia's record high tomorrow is just 63°, and we'll likely reach into the mid-60's. Accompanying this warmth will be a nice shot of rain, which will mainly begin after midnight tonight and last through mid-day tomorrow, with periods of steady rain (moderate to heavy at times). In total, we'll likely see rainfall totals of around 1" through tomorrow evening. Winds will also be a further impact, as we'll see them sustained at 10-25 mph through tomorrow night, with gusts to 40 mph possible. Below is simulated radar for 4am early Sunday morning:
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| 12z NAM simulated radar at 4am Sunday morning (tropicaltidbits.com) |
One possible concern would be for Sunday night/early Monday morning, when lows drop below freezing, which would provide for any remaining wet spots to freeze over following tomorrow's rainfall. In addition, behind tomorrow's system, a trough will dive into the Northeast, bringing winter-like cold back to the region. Highs will regress back into the 30's/low-40's throughout the week, with lows into the teens/20's. Breezy conditions will continue Monday through Thursday, which will help make it feel even colder than it already is.
Finally, for now, we have a very minor snow threat to talk about! A clipper will quickly dive out of Canada on Tuesday, bringing the possibility of flurries and scattered snow showers after the late afternoon and into the night. Though it's nothing major and would likely do nothing more than coat the ground at worst, it would be a very welcome sign to snow-starved lovers of snowflakes (better idea as Tuesday gets closer of course). Below, I'm even attaching this morning's NAM model run, showing some scattered snow showers toward sunset on Tuesday for our area:
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| 12z NAM showing scattered snow showers for 4pm Tuesday (tropicaltidbits.com) |
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