More Snow Coming for an Extra White Christmas

0 Comments 25 December 2012

After 5 feet of new snow over the weekend we have more snow coming today for a very white Christmas.

Warmer air pushing in ahead of the storm will bring the temps up into the 30′s and create snow showers this afternoon. We could see a couple of inches before dusk. Then the main push of moisture pushes in overnight with heavy snow. We should see 5-10 inches at the base and 10-15 inches on the mountain.

The snow will turn showery Wednesday lasting all the way into Wednesday night. We could see 2-4 more inches at the base and 3-5 inches on the mountain. Then a few more inches possible Wednesday night. Total storm accumulations by Thursday morning of 15-20 inches at the base and 20-25 inches on the mountain.

For this weekend the forecast models are trending the cut-off low sliding down the coast further East. The GFS model has light snow showers Friday night into Saturday with 3-6 inches possible.  The European model is much slower and wetter with the low with a second piece of energy dropping down Sunday into Monday. We will have to keep watching the trend because if the European is right we could see light snow Friday night through Sunday night with 1-2 feet by next Monday.

The air will be cold right through the weekend with highs unlikely to break freezing at the base and in the 20′s on the mountain with overnight lows in the single digits.  The cold air will create high snow ratios which is why we could see decent accumulations with the limited moisture. These cut-off lows sliding down the coast are hard to predict with their track so we will have to update the details daily over the next few days.

Then next week we should stay dry as the ridge building off the coast keeps storms to our North.  Then we may see retrogression of the ridge off the coast back out toward Hawaii opening up the storm door and allowing storms to diver further South into CA for the 2nd week of January.  BA



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