Put together this map of the 3 things I’m watching as I start working on my final call forecast. These are influenced by the warm/moist air working up from the south (to help produce the heavy precip) and the cold/dry air to the north. I hope this map makes sense! Let’s talk about it.
While the ultimate storm track will play a role in where the drivers set up. How the cold air and moist air interact determines who sees:
A) Heavy sleet (too much moist/warm not enough cold)
B) Very little snow (too cold/dry not enough moisture)
C) Heavy snow (perfect combination of cold air & moisture)
My forecasting background leads me to believe that Zone C will end up along and just north of the DC corridor. It is hard not to have the warm/moist air push our system north. If that happens, then Zone A will, indeed, see mixing. And Zone B will see a touch more snow. On the other hand, a shift of just 25-50 miles south will drag these zones south as well. That would put heavy snow south of DC with lighter snow in Baltimore & points north.
Lots to mull over tonight and tomorrow morning as I prepare my final call forecast! I’m sure you can see that this forecast is not an easy one. Nevertheless, I’ll be here with you all, forecasting and covering every bit! Stay tuned 
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