Nov 11, 2016 8:19 PM
NH1 First Alert Weather: Chilly Saturday, turning milder for Sunday in NH
Colder air streamed into the Granite State on Friday via a gusty northwesterly wind, up to 50 mph in parts of the state Friday afternoon.
Saturday morning will begin with temperatures in the 20s in most places. High pressure centered over the Ohio River Valley will shift east as the day progresses. A mostly sunny sky is expected across New Hampshire, with a west-northwesterly wind gusting 20 to 25 mph at times during the afternoon. High temperatures will mainly be in the 40s. This gusty breeze will make it feel chillier at times; it will be a true late-fall feeling day.
Winds will begin to shift to the west and even southwest at times later in the weekend, transporting milder air into the region for Sunday. Clouds may develop for a time as this milder air arrives Saturday night and Sunday morning. Overall, Sunday will be a partly to mostly sunny day with temperatures rising in the 50s in most places.
Monday will be even milder, with sunshine and highs in the 50s to around 60 in spots.
The forecast turns much more uncertain from Tuesday on. A coastal storm will likely develop near the Mid-Atlantic on Tuesday. It does not look like it will become a particularly strong storm, but showers are likely to develop during the day on Tuesday from south to north, especially later in the day. Rain may continue into early Wednesday before departing.
The most substantial impact from this system will likely be at the coast, where tides will already be running very high astronomically. Known as the 'king tides', these are the highest naturally occurring tides of the year. Even on a sunny day, low-lying and susceptible coastal areas flood during these very high tides. Adding an onshore wind to the equation, with this system developing to our south, and there will be more significant impacts at the seacoast in the form of coastal flooding and beach erosion. This is something we will be watching very closely.
Unsettled weather is likely to continue into Thursday, with drier air and clearing by Friday.