Henniker, New Hampshire Weather Forecast Discussion

486
FXUS61 KGYX 100530
AFDGYX
Area Forecast Discussion
National Weather Service Gray ME
130 AM EDT Wed Sep 10 2025
.SYNOPSIS...
High pressure remains in control of our weather through the
rest of the week and into the weekend. Daytime temperatures
remain seasonable with fair weather while the overnights will
be cool. Another extended stretch of dry weather continues, with
mainly dry conditions expected through this weekend. A cut off
low pressure center is then possible late this weekend and early
next week, but uncertainty on the evolution of this feature
remains.
&&
.NEAR TERM /THROUGH TODAY/...
Other than some early morning stratus and fog, today is expected
to be another fair weather day with some high clouds possible on
the coastal plain due to a far offshore storm. Temperatures
continue to be seasonable with highs around seasonable
reasonings.
&&
.SHORT TERM /TONIGHT THROUGH THURSDAY/...
Another cool night with good radiational cooling. However, temps
should remain high enough to preclude the development of
widespread frost. Another area of high pressure will begin to
build in on Thursday continuing our stretch of dry weather.
&&
.LONG TERM /THURSDAY NIGHT THROUGH MONDAY/...
Evening Update...
High pressure continues to bring dry and seasonably cool conditions
going into the weekend. By late in the weekend and into early next
week there remains uncertainty on the evolution of a possible cut
off low pressure center nearby. Any clarity on this system is likely
still a couple of days away.
Full Discussion...
In summary, the long-term forecast will be heavily influenced by
high pressure and a dry airmass, offering little if any in the
way of precipitation chances.
Canadian high pressure builds in with good radiational cooling
looking likely for Thursday night. Lows across northern valleys
and normally colder spots could reach the mid 30s with frost
possible while most other places see temps in the 40s.
The high pressure will stay put and bring dry conditions for Friday
and Saturday with cool nights and high temperatures in the upper 60s
to low 70s. An upper trough will push a cold front toward New
England Sunday, but this front will offer little if any in the way
of rain chances as the airmass looks quite dry still.
Going into next week, the ECWMF camp is more supportive of cutting
off an upper low in the vicinity, which would bring some chances for
rain. The GFS side is more progressive with the trough pushing right
through and high pressure building back in to keep things dry. The
low chances of 20% PoP into early next week will suffice for
now due to the uncertainty.
&&
.AVIATION /03Z WEDNESDAY THROUGH SUNDAY/...
Short Term...Any IFR conditions in the river valleys and also on
the coastal plain early this morning will lift allowing for VFR
conditions for the vast majority of the day. Valley fog is once
again expected tonight leading to VFR conditions Thursday.
Long Term...Mainly VFR conditions expected other than IFR to
LIFR nighttime/early morning valley fog at HIE and LEB Thursday
through Sunday.
&&
.MARINE...
Short Term...Small craft conditions will be possibly on the
waters off the Midcoast Thursday afternoon and evening in
northerly flow, but otherwise SCA conditions are not foreseen.
Long Term...SCA conditions are not expected. High pressure
builds in Thursday night, and stays in control through Saturday
with a front potentially approaching the waters around Sunday.
High pressure attempts to return early next week, but some model
guidance is hinting at a low pressure somewhere across New
England. So the forecast for Sunday into early next week is of
lower confidence at this time.
&&
.GYX WATCHES/WARNINGS/ADVISORIES...
ME...None.
NH...None.
MARINE...None.
&&
$$
NEAR TERM...Ekster
SHORT TERM...Ekster
LONG TERM...Clair/Combs

NWS GYX Office Area Forecast Discussion