Mary, since I am responsible for that forecast discussion from yesterday, I will update todays even though it is my day off. But since I will be hiking STP 08, I will be keeping a close eye on things. The upper level low that has sat over the Great Lakes region the past week or so will continue northward and will become an upper level trough that will persist over New England for the next 5 days and beyond. This will continue to cycle in waves of energy that will produce rain, heavy at times and thunderstorms. A surface low will drag a cold front slowly across the region today into tonight continuing rain showers until it fully passes tomorrow (Friday) morning. This will keep things unsettled and foggy on the summits until Friday afternoon when drier air will work in behind the front. Friday night into Saturday morning will see summits become mostly in the clear under partly cloudy skies. Saturday will start out nice but as the day progresses, a low to the north will swing another cold front in. This will bring scattered showers and thunderstorms for the afternoon into the overnight hours and beyond. This front looks similar to todays, another slow mover and soaker. Humidity’s will also be increasing during the day on Saturday. Humidity’s are not as big of a deal on the higher terrain but will make things muggy on the hike down, depending on when you descent. The summits will probably see in and out of the clouds in the afternoon as a result. Highs are projected to be upper 50s to lower 60s still with early morning temperatures at mid to upper 40s. As for percentages for showers, 20-40 percent morning, 35-55 percent around midday, 40-60 percent in the afternoon. So, if I were to give advice, travel early, pack rain gear, and leave the cotton clothing at home. I will try to update tomorrow as time allows and I will be handing out the goodie bags at check in at Flatbreads if anyone else has any last minute questions.
Staff Meteorologist/Night Observer, KMWN (Mt Washington Obs., NH)