Sep 25, 2016 9:38 PM
NH1 First Alert Weather: Frosty start to Monday, wet start to Tuesday
Fall is a season of rapid weather changes across the region. This morning will be frosty, but tomorrow morning will be wet with rain crossing through the state.
Early morning lows in the 30s will cause patchy frost throughout central and southern New Hampshire. It'll be a chilly one at the bus stop, but lots of sunshine will result in a pleasantly mild afternoon. Highs will be in the 60s in most places. High cloudiness will start to dim the sun later this afternoon into this evening, ahead of the next system.
Tonight will be a much milder night as clouds increase. It'll be mostly cloudy, with low temperatures occurring around midnight, in the upper 40s to low 50s. Rain will begin to cross through New Hampshire between 2 a.m. and 4 a.m. It'll be a wet Tuesday morning commute with showers and downpours around. While the rain will fall heavily at times, it won't be enough to substantially help our drought deficit. Most places will see between a quarter to three-quarters of an inch, with locally higher amounts possible in the heaviest of the downpours.
Drier air will move in during Tuesday afternoon, with sunshine breaking out from west to east during the afternoon. The last places to clear will be the coast and mountains.
Thereafter, the forecast becomes less certain.
The jetstream will start to dip to our southwest, and a large upper-level low will become cut-off from the flow, stalling over the Ohio Valley during the middle part of the week.
New Hampshire is unlikely to see a substantial amount of rain, but a cooler, onshore flow may develop. This could allow for more clouds and cooler air, especially in eastern New Hampshire.
Wednesday should turn out to be a decent day, with highs in the 60s to low 70s and a mix of sunshine and clouds.
Thursday is when conditions may become more unsettled, with a chance of showers by Friday, and a higher risk of showers on Saturday.
Timing the exact rain chances is still difficult at this time, so be sure to check back for updates this week.