Forecast for the Mount Washington Valley
5:16 AM, Friday, March 12, 2010
Morning Discussion
High pressure will crest early today then slowly retreat towards the northeast as an area of low pressure begins to deepen and move across the mid-Atlantic for the weekend. A weak frontal boundary lifting slowly northward across the state this morning will tap into available moisture and bring low clouds, some valley fog and possibly some mixed showers early this morning. After it passes though, drier air associated with the high will build back in allowing for late day and overnight clearing for the better part of the state. The only hold out will be the south where a possible inversion may allow clouds to linger longer than expected. Going into Saturday, clouds will thicken and lower over the course of the day as the low slowly approaches from the southwest. Although most precipitation associated with this low is expected more for southern NH and more for the overnight hours of Saturday, a few stray showers could move northward by the late afternoon especially for regions south of the Lakes region. Overnight into Sunday, the low will skirt to the east to our south. Bands of precipitation are expected to move through the south bringing mostly rain with a mix for ovennight hours. Northern regions will only see a chance of precipitation currently but if a weak shortwave forms as indicated to the north, some additional precipitation will spread north with heavier amounts expected in the south. Going into next week, the low exits and high pressure builds back in with fair weather returning.
Ryan Knapp Staff Meteorologist, Mount Washington Observatory
Forecast
Today:
Mostly cloudy w/ a slight chance of morning rain showers then becoming partly sunny. Highs upper 40s°F. Winds from the Variable and light.
Tonight:
Mostly clear. Lows lower 20s°F. Winds from the Variable and light then SE around 10 mph.
Extended Outlook
Tomorrow:
Increasingly cloudy w/ a chance of mixed precipitation overnight. Highs mid 40s°F. Lows upper 20s°F.
Sunday:
Moslty cloudy w/ a chance of daytime rain or overnight mixed precipitation. Highs upper 30s°F. Lows upper 20s°F.
