SMALL SNAG TUES. EVENING

It ain't over 'till it's over, said Yogi to the dreaded Yankees, but he of course was always right. The storm is still "out to sea" as projected exclusively here at toddgross.com, however, a feature at upper levels (which is crucial to look at) that the GFS model had all along , is suddenly being adopted by the NAM model and leads me to believe there will be just barely enough support to keep precipitation going Tue. evening while it is cold enough to snow. It is an upper level short wave, or vorticity maximum, circled, coming down from the Gt. Lakes, kicking out the first one, which is controlling the coastal storm and bringing it out to sea. The one from the Gt. Lakes (as illustrated at 7pm tomorrow night, click on chart) has enough energy and is supported by a very slight "warm advection field" and it may keep light snow going until midnight causing slippery roads, and maybe up to an inch of snow.