Reading/Berks first:
Snow starts 6-7am Tuesday. Snow is steadiest between about 10am and 4pm. All over by 7-8pm. Accumulation, 3-5 inches. Monsoon Martin's You Bet Your Asscast Guarantee©®™ - snow days for everyone!
Most treacherous travel is in the afternoon and evening.
Some leftover snow squalls on Wednesday, particularly in the afternoon. Throughout the day, temps will plunge and winds will kick up. MMYBYAG©®™ - 40% chance of delay; 5% chance of cancellation.
Low of -2 on Wednesday night, so thanks a pantload, Mother Nature.
And on Thursday it will only get up to 9 (yes, NINE) with negative wind chills. I would give it 25% for delays on Thursday.
Now Norristown/Montco:
Snow starts 9-10am Tuesday. Mixes with (and, for a time, changes to) rain in the afternoon, then changes back to snow for the period of about 6-10pm. Accumulation, 1-3 inches. Roads should be OK during the day - just slushy. But in the evening and overnight, slippy. MMYBYAG©®™ - cancellation chances are slim.
Wednesday will see snow showers and increasing winds, but little to no accumulation or travel impact. MMYBYAG©®™ - 15% chance of delay.
And on Thursday temps will be a few degrees higher than Berks, so whoop-de-frickin-doo.
Stay tuned for updates!