Mount Washington Weather Center

Temp	Wind	Gust	W. Chill
18.2°F	215° (SW), 15.8 mph	23.0 mph	3.6°F
METAR *
ZCZC PWMMTRMWN TTAA00 KGYX 070849 METAR KMWN 070849Z 23013KT 1/16SM -SN DRSN FZFG VV000 M07/M07 RMK NNNN

Summit Forecast – Tuesday, January 6, 2009

High pressure will continue to build in and crest today before sliding offshore overnight. Residual low level moisture aided by northwesterly flow will continue fog and occasional upslope snow showers this morning before dissipating this afternoon as drier air tied to the high shifts northward. Clear skies above the summit will not last long though as clouds begin to thicken and lower from the south in anticipation of an incoming low. The primary low will become centered over the Great Lakes before trekking northeastward tomorrow. This will spread a warm front northward later tonight and early Wednesday bringing snow. The low will slowly move up the Saint Lawrence River Valley during the day as a secondary low spawns off the coast, further enhancing moisture over the region. With enough cold air being dragged down by the primary low, snow will continue and will be heavy at times in the afternoon. As of now, models are showing close to a foot possible on the higher terrain. With winds light at the onset of the snow it will start to accumulate on the higher terrain. This will mean that when winds start to pick up though, blowing snow will lower visibility significantly. As of now the loose threshold of 25 mph looks to be met during the afternoon into the overnight hours. But with diminishing winds overnight into tomorrow, and increasing temperatures, a wind chill advisory currently in effect will expire this afternoon.

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Auto Road Vertical Temperature Profile

6288'
18.2°F

5300'
19.4°F

4300'
15.5°F

4000'
11.8°F

3300'
14.8°F

2300'
16.1°F

1600'

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