Heat and Humidity Begins To Build Again Today

Hello everyone!

After a brief reprieve from the worst oft he heat and humidity yesterday, both will be on the increase today as winds shift back around to the west/southwest. Expect mostly sunny skies throughout the day (except for a few low clouds this morning and a bit of cirrus spilling over the ridge to our west) across the entire area. That sunshine will also help us warm well into the 80s across all but the northern mountains (upper 70s) and right along the Midcoast shorelines (near 80). A few spots in southern NH and interior SW ME will push above 90, though not by much (until tomorrow). I can’t totally rule out a pop-up shower up in the mountains, but nearly the entire region will remain dry today.

It will be even hotter and even more humid tomorrow.

-Jack

Active Weather Returns Today

Hello everyone!

After a few fairly quiet days, we’ll be watching out for showers and thunderstorms today as a cold front drops into the region from the northwest.

This morning, we’ll start out with fairly abundant cloud cover ahead of and along a warm front pushing through the area from the southwest. A few stations in southern parts of the area are reporting patchy fog in the wake of last night’s showers. The general trend should be towards sunnier skies by mid/late morning especially across southern and southwestern parts of the area.

That sunshine will push temps into the upper 70s or low 80s across most of the region except for the mountains and immediate coastline. South-southwesterly breezes will bring humidity back up to unpleasant levels (dew points in the high 60s/low 70s). As we all well know by this point in the season, a cold front plus heat plus humidity is a recipe for strong thunderstorms.

Thunderstorms will be developing over the mountains beginning around noon before moving east.

Today’s most intense storms will occur in the mid-afternoon hours over southern and central parts of the region (generally west of I-95 and south of Rt 2). These storms will pack quite the punch if we get enough sunshine this morning to produce robust instability. Damaging winds, heavy rain, and frequent lightning will be the primary threats, but some small hail is possible too. I can’t even totally rule out a brief tornado in the Sebago Lake region which is notorious for giving rotating storms a last push across the finish line.

Showers and storms will fade and move offshore by sunset.

-Jack

Heat Takes A Break Today As Clouds And Showers Develop

Hello everyone!

Today will feature a brief but extremely welcome pause on the extreme heat we’ve been dealing with over the past several days. The culprit for such a pause will be abundant clouds and some showers/storms moving through the area on the northern edge of a storm system moving through central New England. While a few sunny breaks are noted on satellite imagery this morning, the general rule of thumb today is that you’ll see more clouds than sun.

Showers are already moving north through SW NH ahead of a warm front draped across MA. So far, no lightning has been observed with these cells, but a few rumbles of thunder can’t be ruled out. These showers seem likely to gradually weaken as they move towards SW ME in a few hours.

A round of more widespread showers and storms will arrive from the west during the evening hours after developing over NY this afternoon. These storms will be strongest in SW NH (where a few damaging wind gusts are possible) and will weaken as they move ENE towards the coastline.

Temps today will range from mid 70s right along the coastline and up in the mountains to low/mid 80s in southern NH and possibly spots near Augusta/Waterville which might see a little more sunshine this morning.

-Jack

Extreme Heat and Humidity Continues Today

Hello everyone!

Today will feature more of the heat and humidity we saw yesterday as a cold front approaches then crosses the region.

Satellite imagery this morning shows a mix of sun and clouds across the region with the sunniest spots currently being along the coast and the cloudiest spots currently being found in the north/mountains.

As the morning goes on, I’d expect some of this cloud cover to burn off and by noon, we should be enjoying partly to mostly sunny skies across the region. The coastal plain will, as per usual, be sunniest. This sunshine will help push temps into the low-mid 90s for southern NH and much of the coastal plain of ME. As the front crosses the region this afternoon, winds will shift towards the west which means that the coast will no longer have access to the cooling influence of the Gulf of Maine. As a result, expect temps to spike into the upper 80s/low 90s all the way to the beaches. The exception, of course, will be far southern parts of the Midcoast peninsulas where winds coming from the west will still have access to some water.

During all this heat, unfortunately the humidity will remain high. Dew points will be stuck at or above 70 for most of the region today despite the drying influences of downsloping. As a result, heat index values will push towards 100 across southern NH and SW ME. The rest of the ME foothills/coastline will see heat index values in the mid/upper 90s. As a result, heat advisories have been issued for our entire area outside the mountains for this afternoon. This heat will be dangerous if proper precautions aren’t taken. Basically, try to limit strenuous activity during the heat of the day and be sure to stay hydrated.

With all this heat and humidity and a cold front in the vicinity, we would be making a big mistake to neglect talk of thunderstorms this afternoon. The biggest limiting factor in this afternoon’s severe weather will be that it’s too hot aloft to support thunderstorms without a strong initial upward push (this is known as a capping inversion). So we won’t see very many storms. That said, for the one or two that might pop up along the coastal plain this afternoon, the environment will be very favorable for damaging winds in addition to heavy rain and frequent lightning. So you probably won’t see a thunderstorm this afternoon, but if you do, it could be a fairly strong one. The best chance for storms will be closer to the coast during the early/mid afternoon hours.

-Jack

Extremely Hot and Humid Today

Hello everyone!

Today will feature extreme (for our region anyway) heat and humidity as southwesterly winds pick up ahead of a cold front approaching the region from the west.

Satellite imagery this morning shows mostly sunny skies across southern parts of the region while clouds drift through northern parts of the area. These clouds are the remnants of thunderstorms that developed last night over Quebec. A few of those clouds are still producing a few raindrops near Greenville. These should dry up over the next few hours.

Generally dry conditions will prevail until late this afternoon/evening when a couple showers could pop up over the higher terrain.

The main story today will be the heat and humidity. Partly to mostly sunny skies and incredibly warm air aloft will allow temps to soar to near record levels especially across southern NH and southwestern ME.

This map shows NWS forecast high temperatures for the Northeast today. Circled stations are those that may break today’s record highs. Temps in the upper 90s will do just that in southern NH this afternoon. Most of the central NH and interior SW ME will be a touch cooler (low/mid 90s). The mountains and northern parts of the region will benefit from a few clouds this morning and will only see highs in the upper 80s. The best place to be this afternoon will be along the Midcoast where onshore south-southwesterly winds will kick up late morning and bring a relatively cooler marine airmass onshore (highs in the upper 70s to low 80s).

One other note about today: it will be quite humid, even (especially) where the hottest temperatures will be found. As a result, heat index values will surge above 100F over southern NH and adjacent parts of SW ME.

Other spots away from the immediate shoreline will see heat index values in the mid/upper 90s. The NWS has issued a heat advisory for most of the area outside the mountains and Midcoast due to these high heat index values. If you can, limit the amount of time you spend outside during the heat of the day. If you do need to be outside, make sure to stay hydrated and take frequent breaks!

It will be anothah scoahchah tomorrow though with the added excitement of a few showers and storms.

-Jack

Heat and Humidity Begins To Arrive Today

Hello everyone!

Today will feature the arrival of hotter temperatures and higher humidity as winds shift around to the southwest. Before we get to either the heat or humidity this afternoon, we’ll have to finish burning off some fog that’s present over eastern parts of the area this morning. That process should be complete for all except the Midcoast peninsulas by mid/late morning. Once we’re done with the fog, expect mostly sunny skies for the rest of the day.

High temps will range from the upper 70s in the mountains and right along the shoreline to the low 90s in southern NH. A few showers will pop up this afternoon over far northeastern parts of the area, but otherwise we’ll stay mostly dry.

-Jack

Cool and Unsettled Today

Hello everyone!

Thick cloud cover has rolled into the region this morning ahead of a cold front in the Saint Lawrence Valley. As that front slides east, it will bring a few rounds of showers to the region today. The first and perhaps most widespread round of showers is in progress currently across the mountains. Because we have so much cloud cover this morning, there won’t be enough instability for these showers to produce much more than some rain and possibly a brief rumble of thunder.

As the front drifts through this afternoon, showers will become more isolated and skies will begin to brighten especially in NH and western parts of Maine. Southerly onshore flow and plenty of clouds/showers will keep temps on the cooler side today. Highs will range from the low/mid 60s in much of Maine to low/mid 70s in much of NH.

Heat and humidity will return with a vengeance this weekend.

-Jack

Pleasant Weather Continues Today

Hello everyone!

Today will feature another round of pleasant weather as high pressure drifts lazily over our area. Morning stratus and fog will burn off over the next couple hours, and skies will be mostly clear except for a few cirrus spilling over the top of the ridge from the west. Winds will generally be light out of the southeast today which will keep temps in the low/mid 70s for most of the area (a few low 80s in western NH). Thankfully, dew points will also remain on the lower side (mid/upper 50s). Aside from the possibility of a brief shower in NH this afternoon/evening, we’ll be mostly dry today.

Enjoy the nice weather while it lasts! Heat and humidity returns this weekend.

-Jack

Comfortable Weather Returns Today

Hello everyone!

In the wake of the system that brought considerable storminess to the region yesterday, we’ll enjoy comfortable weather today as northeasterly winds bring cooler and drier air into the region from Canada. Now that we’ve moved into mid-summer, a northeast breeze is hardly a recipe for raw/chilly conditions, especially given how warm the Gulf of Maine and Gulf of Saint Lawrence are at the moment. So we’ll enjoy temps in the low-mid 70s across the entire region this afternoon. Morning low/mid clouds will burn off over the next couple hours leaving mostly sunny skies by this afternoon. Aside from the possibility of a very brief shower up in the mountains this afternoon, we’ll remain dry throughout the day.

-Jack

Another Round of Showers and Storms Today

Hello everyone!

Today will feature another round of showers and thunderstorms as yet another upper-level disturbance pivots through the region.

Skies this morning range from partly cloudy across parts of Maine and far southern NH to overcast with heavy thunderstorms over parts of central NH. The storms in NH this morning are quite impressive and pose a serious flash flooding threat especially just west and southwest of Conway.

Satellite imagery is quite impressive for the early-morning hours here in New England. We don’t often get enough instability so early in the day to support such strong thunderstorms. I suspect we’ll see these particular storms begin to weaken a bit over the next couple hours while the atmosphere “recharges” in preparation for another round of storms to develop during the late morning hours.

By 1 PM, storms will be widespread across inland parts of the area and will even begin to develop along the sea breeze boundary near the coastline. Storms this afternoon will be capable of producing strong winds, heavy rain, and frequent lightning. A few small hailstones can’t be totally ruled out either.

By 6 PM, we still won’t have exhausted all the energy available in the atmosphere to support storms, at least according to current forecasts (I have some doubts given the southeastward advance of a low cloud deck from Downeast Maine this morning, but we’ll see if that can burn off). Some parts of the foothills will see two or three rounds of thunderstorm activity today. Those spots that do get hit repeatedly will have to worry about flash flooding given the amount of moisture we have to work with today.

Showers and storms will eventually subside around sunset.

Widespread cloud cover and repeated rounds of thunderstorm activity will keep high temps in check today. The mountains might not even crack 70 while most of the coastal plain and southern NH rise slowly into the mid/upper 70s. With dew points still stuck in the 60-65 range, it will still feel humid despite the cooler temps.

-Jack

Reliably hype-free weather info for Western Maine and New Hampshire from amateur forecaster Jack Sillin

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