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Mount Washington Weather Center

Temp	Wind	Gust	W. Chill
48.6°F	164° (S), 18.3 mph	31.1 mph	42.1°F
METAR *
ZCZC PWMMTRMWN TTAA00 KGYX 030155 METAR KMWN 030155Z 17021G27KT 1/16SM -RA FG VV001 09/09 RMK NNNN

Summit Forecast – Thursday, July 2, 2009

An upper level low that has remained fairly stationary extending from the Great Lakes and over New England will remain nearly unchanged over the forecast period. But the key word here is nearly because the low will be moving ever so slowly as it creeps to the north and east over the forecast period. As it progresses, spokes of energy will continue to move through New England bringing about rain showers and thunderstorms as well as fog on the summits. The first spoke is evident on radar this morning moving through New York State and extending over northern New Jersey to Connecticut and Rhode Island. On the southern edge a shortwave low is forming, further intensifying and extending the reach of showers and thunderstorms as is moves northeast. This will continue north spreading rain showers and thunderstorms in this morning. After this frontal band moves through, stratus will continue with cumulus popping up into convective showers and thunderstorms similar to the past few days, especially towards our western slopes. As diurnal heating dies down, so will thunderstorms but showers will continue off and on through the night as another spoke of energy moves through. On Friday, another shortwave moves through to the north continuing the unsettled weather of showers and thunderstorms with most of the concentration occurring to the west and north during the day. Temperatures will remain fairly stagnant over the period as warm southerly air continues but winds are expected to shift from a southeasterly flow to a more westerly flow over the forecast period as the low slowly passes to our north. Expected thunderstorms over the forecast period will contain heavy rains, hail, high winds and frequent lightning. Thunderstorms will be hard to spot over the period as dense fog obscures views above and around you as you climb in elevation. Fog over the forecast period will continue to limit visibilities to 25 feet or less at times for elevations above 4000 feet, making travel between cairns very slow. Slick, rain soaked rocks and trails will make it slow going as well. And remember, if you hike up be prepared to hike back down, there are no guaranteed rides down regardless of the weather.

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Auto Road Vertical Temperature Profile

6288'
48.6°F

5300'
50.1°F

4300'
51.1°F

4000'
52.3°F

3300'
54.3°F

2300'
56.1°F

1600'
57.7°F

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