It's my first snow forecast of the season and I can barely contain my excitement!!!!
So there's a coastal storm on the way, and the forecast models have shifted its track to the northwest, putting it more toward the Lehigh Valley and Phila suburbs area, and increasing totals for south Jersey.
Here is what to expect.
Snow spreads southeast to northwest beginning tonight at about midnight. (That's Saturday 12/9/17 at 00:00 for those of you on maritime/military clocks.) So snow will begin first in south Jersey, then Wilmington, then Philly, and so on.
In Berks, look out for snow between about 8am and 3pm. It's not going to snow steadily during that period - we are on the outer edge of the storm, so I expect impacts around here to be fairly minimal. Expect scattered light snow showers and maybe a squall (short period of heavy, wind-driven snow) or two.
Totals:
South Jersey, 3-5 inches (mostly on grassy and untreated surfaces)
Philadelphia and suburbs, 1-3 inches (mostly on grassy and untreated surfaces)
Berks County and the Lehigh Valley, coating to an inch of snow (mostly on grassy and untreated surfaces)
Impacts:
During a squall, conditions are wack - extremely low visibility and quickly covered road surfaces. But in general, just slow down a bit and you'll be fine.
The high on Saturday will be in the mid 30s; the overnight low will dip down to 24.
Sunday 12/10 will be mostly sunny and breezy, but an isolated squall or light snow shower cannot be ruled out in the early morning. High 36, low 23.
There's a chance of some mixed rain and snow showers on Monday evening into Tuesday, but I don't expect that to impact morning commutes.
Thereafter:
Getting obnoxiously cold the second half of next week. Wednesday's high will only be 30; into the lower teens at night. Thursday, Friday, Saturday - a few degrees higher each day, but not a dramatic warmup. Sunday 12/17 will see a high of 36 and a low of 19.
Oh - and one last thing: I would like to inaugurate a new feature on the blog: Ask Monsoon™©Ⓡ. I invite you, my faithful readers, to send me questions (click on those words and an email will magically compose itself). These questions can, of course, be about the weather, but they can also be about whatever topic you choose. I am an enthusiast of many topics, and am renowned as a man who knows a little about a lot.
Stay tuned for updates!
Monsoon

In this follow-up, I will forecast the storm for two places not covered by my original post: Princeton, NJ and Nutley, NJ. I regret the omission.
Princeton: Snow begins by 7am or so on Saturday and continues on and off throughout the day. Tapering by late afternoon / early evening. Accumulation 2-4 inches. Dramatically reduced visibilities during squalls, obvi. Road conditions a bit slippery but not treacherous. You know, I should do a road condition meter. Like 10 is smooth sailing, no issues and 1 is do not attempt to drive or you will surely die. Remind me.
Nutley: Snow by 7 or 8am, tapering by 6 or 7pm. Accumulation 2-4 inches. Road conditions: a bit slippery, but take it slow and you'll be fine. Dramatically reduced visibilities during squalls, obvi.
Monsoon
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