Friday Night Update Jan 6 – The shirt of the storm expectation to the north we have been talking about for a few days is now getting validation as it is about to arrive. A Winter Weather Advisory has now been extended to northern Maryland, including Baltimore, southern Harford and Cecil Counties. This area is on the northern edge of the storm that will receive 1 to 3 inches of snow. This may reach farther north to the PA line. Meanwhile parts of the Delmarva will get between 6 and 12 inches. Temps in the low 20s will mean a fluffy snow, maximum stickage, and a fluff factor. I am sorry for the late post, but family agenda and consulting with my clients slowed my report down. Now I get to show you the details. Note: This will be a southern storm with 6 inches or more for Salisbury and Ocean City. But I still think there wil be snow extending farther north. Below are my timeline and snowfall map, along with the radar simulation. But first:
Here is the Water Vapor Satellite Loop. I’ve highlighted a signature I look for called a baroclinic leaf. It is a mark of moisture often showing up on the northwest edge of the potential snow edge a day before a storm arrives. This is the weakness in the atmosphere being plowed ahead of the storm to follow.
Watch the loop below to see the flow of the moisture and see the northwest push along the east coast. This is the timing issue I mentioned earlier this week. The storm energy will arrive before the jet can drop too far south and let the storm reach us.
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Water Vapor Satellite Loop
Snow Arrival Timeline