Today will feature the return of sunshine for much of the area, though some folks will have to be a bit patient. The inverted trough that brought snow to the area yesterday is drifting lazily southwest as we sit under a region of weak winds aloft. Some snow showers are still showing up on radar over Central NH but they don’t appear strong enough to drop anything more than a coating.
Drier air will slowly filter into the region today on northeasterly winds as that inverted trough keeps sliding southwest. Eventually, we’ll get dry enough for clouds to clear. Satellite imagery suggests that the clearing line is now pushing through Greenville ME though patchy sun is possible farther southwest. By early this afternoon, most spots northeast of Portland should see some sunshine. Everyone should be clear by sunset.
Enjoy the sunshine while it lasts. Clouds return tomorrow ahead of our next system set to arrive on Thursday. Interestingly enough, that system will be backing into the region from the northeast. Not exactly typical for our latitude!
Here’s a little loop showing our next frontal boundary originating in the Central Atlantic today before moving west through Newfoundland and New Brunswick/Nova Scotia tomorrow and eventually arriving here in Maine on Thursday.
Today will feature chilly temps and continued unsettled weather as a storm system lingers just off Cape Cod. The first round of precipitation associated with that system has moved well northeast of the area as of 6 AM so most of us are seeing either dry conditions or a very light drizzle. These conditions will remain in place over the next few hours before an upper level disturbance arrives around noon. Once that disturbance gets here, expect showers to develop again over the Maine coast and adjacent parts of the foothills. Showers will initially fall as rain (especially right near the coast) but as cold air surges in from New Brunswick, expect a changeover to snow. Minimal accumulations are expected but up to 1″ is possible where stronger snow showers linger. This band of snow showers will slowly drift southwest this evening, bringing some precipitation into southeastern NH by sunset. High temps will be quite chilly today, ranging from a little below 30 in the north to around 40 in far southwestern NH.
I wanted to end this post with a quick note about last night’s storms. They were, well, unexpected certainly by me and perhaps by a few others too. I took a look through some of the data I analyzed yesterday morning with the benefit of hindsight. Should it have been obvious that thunderstorms would occur? The answer is that based on available forecast model data, it wasn’t entirely obvious. There was a layer of instability forecast between 10,000 feet and 30,000 feet, but it was extremely weak. That type of instability would only support thunderstorms if there was a strong forcing mechanism to push air upwards independent of thunderstorm updrafts. With the storm responsible for producing last night’s precipitation decaying >500 miles to our west, it wasn’t clear that we’d be able to manage such robust upward motion. That said, in retrospect I think I should’ve mentioned the possibility for thunder in southern areas. Hopefully you enjoyed the surprise fireworks, I know I did despite the fact they highlighted a mistake of mine.
Today will feature the return of unsettled weather as our next storm system approaches from the west. Satellite imagery shows overcast skies across just about the entire region except for a small area near Augusta as of 6 AM. Clouds will finish overspreading the region in short order this morning and will remain in place for the rest of the day.
Precipitation associated with this system will arrive from SW to NE today, beginning a little before noon in SW NH before moving into far W ME around 2-3 PM and northeastern parts of the area by 5-6 PM. A few showers are possible before these times but that’s when the steadier precip should begin. Precipitation will fall as snow in the mountains, a mix of snow and sleet in the western/northern foothills, and rain elsewhere.
Colder air will filter south tonight as a secondary area of low pressure develops off Cape Cod. As a result, parts of the southeastern foothills and interior coastal plain that saw rain for most of today will switch over to sleet, and the NW foothills that saw sleet for most of today will switch over to snow. Even the coastline should get some flakes by tomorrow morning, though they shouldn’t accumulate much.
As far as accumulations go, here’s what the NWS is thinking for the event today/tomorrow. I think this looks pretty good for most spots though I’m not yet convinced that places like Camden and Belfast will pick up >2″. Overall, this won’t be a storm with major impacts and most of us should be staying at home anyways, so the greasy roads tomorrow morning will be far less of a bother than usual.
Temps today will be on the chillier side ranging from 45 near Augusta to 35 in the mountains of NH.
Canadian high pressure will remain in charge of our weather today as our next storm system takes its sweet time developing out in the Plains. As a result, we can expect another gorgeous day of mostly sunny skies and fairly mild temperatures. Look for highs ranging from 45 in the north and along the coastline east of 95/295/south of Route 1 (due to a developing sea breeze) to 55 along much of the coastal plain. A few high clouds will encroach on the region later this afternoon, but otherwise everyone will enjoy sunshine. If you can, definitely take advantage of the beautiful weather to get outside (while keeping your distance from others of course).
Today will feature clearing skies and continued mild temps as a weak area of low pressure moves from the Midcoast into New Brunswick and is gradually replaced by an area of weak high pressure from Quebec. Satellite imagery this morning shows clear skies already in place across most of the area with the exception being in the mountains where NW breezes are supporting a bit of upsloping. Those clouds should gradually dry up this afternoon. Temps will remain on the milder side today, ranging from 35 in the north to 55 along the coast.
Today will feature much sunnier skies and modestly warmer temperatures as the coastal storm that grazed the region yesterday departs out to sea and high pressure once again drifts overhead. Another storm system will drift towards the region from the west this afternoon, at which point clouds will once again increase. Enjoy the morning sunshine while it’s here! While the sunshine will boost temps a bit higher than they’ve been in previous days, we’ll still be on the chillier (eastern) side of the high pressure system with light northerly breezes. As a result, temps will remain on the cooler side ranging from 40 in the mountains to 50 in southern NH.
Today will feature cool temps and calm weather as Canadian high pressure drifts overhead once again. Expect some sunshine this morning especially in northern/eastern areas before clouds move into the area on the north side of another ocean storm developing near North Carolina. That storm will pass far enough to our south that precipitation is not expected, but we will see a period of overcast skies this afternoon. Temps will remain on the cooler side today due to the clouds and gentle northerly breezes between the high to our north and low to our south. Just about everyone should top out within a few degrees of 40 (a little above near Augusta and a little below in the mountains/western NH).