Winter Storm Ψ: Saturday update!
So there are some variables at play with Winter Storm Ψ (pronounced psai, rhymes with "high" - you do pronounce the "p," but don't be obnoxious about it. Just a little hint of it. The faintest whiff of p. Wait, no.), including warmer air that may mix in aloft. Who gets all snow, and who gets snow-rain-snow? And who gets nothing? And what is a rhetorical question?
For Philly and the immediately northern and western suburbs, expect light snow to start by 5-6pm, then really gets going after 10pm. A bit of mixing (rain) toward the Monday AM commute, but this is not good news; rain will freeze to surfaces and actually serve to make travel even more hazardous. Precipitation transitions back to snow and tapers after noon on Monday. Accumulations for this region are 4-6 inches.
For south Jersey and Delaware, we'll see snow start about the same time as above, but the period of rain will be more extensive: about midnight to 6am. So because of this extended rain period, we'll see fewer travel delays and lower accumulations in this region (2-4 inches).
For Berks, Lehigh, and Schuylkill Counties--as well as much of north Jersey--we'll see almost all snow with a little bit of ice mixed in early Monday morning. Accumulations will be 6-8 inches (with isolated pockets getting higher amounts where heavy banding sets up).
For Punsxutawney, expect snow by the evening, with lake effect snow moving in by mid-day Sunday and continuing through Monday. Monday will begin with one disc-jockey annoying another by playing Sonny and Cher's "I Got You Babe." You will make idle chit-chat with the innkeeper, Ned Ryerson will stop you on the street, you will step in a puddle, you will make your way to Gobbler's Knob, you will drolly say, "This is one time when television really fails to capture the true excitement of a large squirrel predicting the weather." The blizzard that you predicted will miss us will actually shut down the interstate, stopping Larry, Rita, and Phil in the van. You will awaken the next day to "I Got You Babe" and do it all over again. Along the way, you'll become a piano virtuoso and ice sculptor.
Winds picking up (and temperatures dropping) throughout the day on Monday. Very windy and cold overnight from Monday into Tuesday with a low of, like, 0. (Tuesday morning commute wind chill: negative teens.)
Chance of delay Monday, 36.5%
Chance of cancellation Monday, 89.98%
Chance of delay Tuesday, 72.2%
Chance of cancellation Tuesday, 28.4%
It terms of future winter weather, I don't see anything potentially problematic until around mid-month.
Stay tuned for updates!