Mild For Most Today, Rain Arrives This Afternoon

Hello everyone!

Today will feature mild temps for most of the region as warm air surges north ahead of an approaching cold front. Winds ahead of this front have a slight easterly component, so the coast will generally be missing out on the warmer temps due to the influence of the still-cold Gulf of Maine. Highs along the immediate coast south of Portland and along the entire coastal plain north of Portland will sit in the mid 40’s. Farther north in the mountains, the still-deep snowpack will also hold temps to between 40 and 45 degrees. If you’re not near the ocean or the mountains though, and you happen to be SW of Lewiston, you’ll get access to much warmer temps in the mid to upper 50’s. In fact, some parts of Southern NH could spike up into the 60’s if they can get a few sunny breaks this afternoon. Any sunny breaks will be the exception not the rule today as clouds from the front remain widespread.

As for precipitation, we will get some as the front crosses the area this afternoon. Showers will arrive in western NH around noon, moving into Maine about an hour and a half to two hours later. Showers will fall as rain except above 3,500 feet, where a couple inches of snow is possible. Rain and snow will depart from west to east early in the evening, with perhaps a break of sun or two before sunset.

Cooler and drier weather will arrive behind the front for the first half of the work week.

-Jack

Cool And Unsettled Today

Hello everyone!

Today we’ll see cooler temps, but keep the unsettled weather as a frontal boundary lingers just south of the region. Expect that front to get hung up as it tries to move north over the still-deep snowpack in the mountains. As a result, most of the region will remain cool and unsettled today as the warm airmass gets forced to rise up and over the low level cold air locked in place over Maine. Expect overcast skies throughout the day, with patchy drizzle and fog developing this afternoon. Highs should sit right around the 40 degree mark for most of the area, except for SW NH. Aside from the drizzle, we won’t see any organized/widespread precip today as strong forcing for ascent remains well to our west.

SW NH will see temps soar into the 60’s as the front should move up to around the 101 corridor. Patchy sunshine should arrive in the warm sector, which will make for a very pleasant day!

-Jack

Mild But Unsettled Today

Hello everyone!

Today will feature generally mild temps, but also unsettled conditions as a cold front begins the process of crossing the area. Expect mostly cloudy skies, along with showery precipitation especially in the morning hours today. By this evening, the front will have pushed down towards the coast, which may allow for some sunny breaks to develop in the north. High temps will range from 45 in the north to 55 in the south away from the immediate coastline.

-Jack

Clouds and Temps Both Increase Today

Hello everyone!

Today will feature upward trends for both cloud cover and temperatures as a cold front approaches from the west. Expect high temps to rise into the low 40’s north and upper 50’s in interior southern NH. Onshore southerly winds will keep the Midcoast on the cooler side of the region today, with highs around or perhaps even a little below 40. Clouds will slowly but steadily thicken as the day goes on, but any precip should hold off until well after dark tonight.

-Jack

Milder Today

Hello everyone!

Today will feature milder temps and generally sunny skies as high pressure slides offshore. Expect high temps to range from 35 in the north to 50 in southern areas that are away from the immediate coast. Given the absence of a westerly wind, we can expect cooler temps along the immediate coast due to the sea breeze circulation. Highs near the shore will hover around 40.

-Jack

Cool And Calm Weather Continues Today

Hello everyone!

Today will feature more cool temps and generally quiet conditions as high pressure drifts slowly overhead. Temps will be very similar to yesterday, ranging from around 20 in the north to around 45 in Southern NH. Thankfully, we’ll have full exposure to the strong March sun, which will make it feel quite pleasant if you’re outside. Sunny skies will be the rule for just about the entire region today, so get out and enjoy the lovely weather!

-Jack

Cool And Clear Today

Hello everyone!

Today will feature cool temps and clear skies as Canadian high pressure slides towards the region. Expect temps to top out a bit below normal today, ranging from 20 in the mountains to 32 for most of the foothills to a little above 40 in the typical southern NH warm spots. Get outside and enjoy the lovely weather!

-Jack

More Pleasant Early Spring Weather Today

Hello everyone!

Today will feature some lovely early spring weather as we sit ahead of an approaching cold front. That means we’re on the warm side of the front. As a result temps will be seasonably warm ranging from 35 in the mountains where the fresh snowpack will act as a refrigerant, to 55 in Southern NH. A westerly breeze should hold the sea breeze to the peninsulas/islands, so most of the coast will enjoy warmer temps as well.

Skies will begin sunny, but clouds from the front will overspread the area from NW to SE this afternoon. Those clouds will eventually produce some light snow showers in the mountains later on this evening, with little to no accumulation expected.

-Jack

Storm Departs Today

Hello everyone!

Today will feature the departure of yesterday’s storm in fairly traditional fashion as NW breezes pick up. Scattered snow showers this morning will clear up along the coast by this afternoon, and remain ongoing in the mountains. Additional upslope accumulations of 1-2″ are possible in the favored spots. As skies clear in the south, look for temps to warm up a bit above freezing. Meanwhile in the north, the clouds and colder airmass will hold highs to about 30. Scattered power outages are possible especially in the foothills and mountains today as breezy winds put stress on trees already loaded with heavy wet snow.

-Jack

Tricky Late Season Winter Storm Today

Hello everyone!

This morning’s post will be a bit lengthier, as we have a storm of substantial interest in the forecast for today. The general summary is that low pressure moving through Southern New England will bring heavy precipitation to the region today, some of which will fall as snow. Who exactly sees snow vs rain and how much that snow accumulates is where the tricky part of the forecast comes in.

Mountains:

This appears to be a mostly snow event for the mountains, especially at higher elevations above 2,000 feet. Here, 12-18″ of snow is likely through the day today. Wax up those powdah skis and wish your boss a nice weekend, this might be the last time for a while we can enjoy smooth powdery turns. Expect temps around 30 this morning to drift up towards 32 this afternoon.

Foothills:

What an interesting and tricky forecast for the foothills. Lewiston is reporting 34 and light rain as I write this a little before 8 AM, but an area of heavy precipitation awaits just offshore. As those heavy bands move in, air will begin rising rapidly through the atmosphere, cooling as it does so. Additionally, the process of melting snowflakes will begin to take warmth out of the air via latent heat exchange. The net result will be a dynamic cooling of the lower atmosphere to right around 32F, which will allow for a changeover to snow.

Here’s a visualization of that changeover as the heavy banding arrives. Snow that falls during this time will be heavy and wet, but could accumulate relatively efficiently given strong dynamics aloft.

As we move later into the midmorning hours, warm air will attempt to resume its march northward. Exactly how fast this process plays out will be critical in determining which parts of the foothills get 4-8″ of snow, and which get 2-4″. Higher elevations will hold onto snow longer. Eventually by later this afternoon, precipitation will lighten in intensity and once we remove the dynamic cooling processes, we’ll likely get the changeover back to rain. Temps will hover right around freezing this morning before rising into the mid 30’s this afternoon.

It should be noted that warm air has a notoriously hard time invading the foothills, so there is an outside chance that those areas remain around freezing for the rest of the day, and a wider swath picks up more than 6″.

For those areas that do see several inches of heavy wet snow, power outages are something you should be prepared for given the weighing down of tree limbs and the potential for some breezy conditions later this evening.

Coast:

Along the coast we have another tricky forecast. Many coastal sites are reporting light snow or mixed precipitation this morning, and with the heavy precip banding now trying to move onshore, it’s possible that dynamic cooling briefly sustains this. A brief coating-2″ is possible in the next couple hours before a changeover to heavy rain. Some embedded thunderstorms are even possible in Penobscot Bay later during the lunchtime hour as deep tropical moisture rushes north. Temps will start in the low to mid 30’s this morning and rise into the upper 30’s to low 40’s this afternoon.

With strong onshore winds and astronomically high tides, watch out for some minor coastal flooding in the typically vulnerable areas this afternoon especially south of Portland.

Precip will become lighter and spottier for the entire region this evening, with cold air beginning to rush back into the area tonight. As this happens, watch for black ice to rapidly develop on previously wet roads.

Graphics used in this post come from weathermodels.com, an excellent source for weather data visualizations if you’re interested in going a little bit more in depth with your weather watching.

-Jack