Sunday, December 23, 2012

White Christmas & Thursday's Storm

Not much new to report since our previous update, but the Christmas Eve snowfall is still on--1 to 2 inches--and the Thursday storm is still somewhat up in the air.

The two different models are still fighting over the exact track of the storm. NOAA likes the more easterly track, which means more snow. Still, it sounds like sleet will get into the mix around midnight on Wednesday whichever track the storm chooses.

Here's the important info for the Wednesday/Thursday storm: the amount of moisture. Right now the prediction is anywhere between .7 inches and 1.5 inches of liquid. Generally speaking, the snow to liquid ratio is 12:1. When it's colder, this ratio can be higher, and warmer air lowers the ratio. So, if we get .7 inches of moisture, we can anticipate at least 7 or 8 inches of snow. If we get all the way to 1.5", then we're looking at 18" of snow! Sleet mixing in (which is likely) will keep the total inches down, so we'll have to factor that into the equation.

We really don't think we're going to get 18" of snow. More likely, we see 4-6" with the aforementioned sleet mixing in. The storm will start late on Wednesday and carry through the afternoon on Thursday. If we get a Winter Storm Watch or Warning on Wednesday, we're going with the name Bianca for this storm (see our poll).

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