If you are a man who has to wear a suit during the summer (or a women who has to wear a mens suit but that trend was mainly left in the mid 80s) you know all about the "insta-sweat." Days so warm and humid that your upper lip and forehead start sweating as soon as you tighten the knot on your tie. (I always found it ironic that, despite the fact women are scientifically more sensitive to cold, many wear sun dresses to work when it's hot and men wear suits. No wonder almost every workplace has had an office battle to the death over the thermostat setting)
Anyhow, my point here is that today will be one of those "insta-sweat" days...high humidity, high temperatures.
Today: Temperatures are already into the low 70s in many spots this morning and dew point readings are in the mid 60s...not a great combination. Southwest winds are pumping in a much warmer airmass when compared to Thursday's weather and you'll feel that difference this afternoon. As far as sky conditions, however, Friday will play out like Wednesday/Thursday: Morning clouds/fog, mid-day sunshine, scattered afternoon thunderstorms. Even just 1 or 2 hours of sunshine in this airmass should rocket most of us into the upper 80s with a few low 90s likely to be reported over western Maine and New Hampshire. This combination of heat and humidity will likely be oppressive by most standards and it will act to trigger a few thunderstorms. There is a cold front in Vermont that should arrive by late this afternoon and into this evening, that will provide the focus for a broken line of thunderstorms around 4 PM. Not everyone will get hit though as the storms look to be almost as scattered as they were on Thursday afternoon.
Tonight: Since the thunderstorms will be largely driven by the sunshine, storms will end rapidly as the sun sets. For the remainder of the evening look for partly cloudy conditions with dense fog once again developing. Be aware that in some spots the visibility will be reduced to under 1/4 of a mile in the fog.
Saturday: The cold front will drape itself to our south and a weak ridge of high pressure will build in. That combination should make for a warm but mainly settled day. Humidity will still be high though and temperatures will once again push into the mid to upper 80s in many spots...so it will be hot but not as bad as Friday. There is a SLIGHT chance for shower over extreme western Maine and into New Hampshire by the afternoon, but most of us stay dry.
Sunday: I'm going to admit this forecast makes me a little nervous. There is a big ole cold front racing towards using by Sunday afternoon but it appears as though it won't get here until Sunday night. Even accounting for "pre-frontal" showers which are so common around here, we should stay dry until 7 PM or later. So why does it make me nervous? Well because the entire forecast hinges on the fact that the computer models are correctly projecting the speed of the front, which is always a dangerous assumption. I'm riding this one into the ground though so I'll call it early sunshine giving way to some pretty thick clouds by the afternoon. High temperatures will be in the low 80s with that sticky air still hanging around.
Showers and thunderstorms roll in statewide on Sunday night and last through mid-day on Monday. Could get some decent rain out of that event.
Once the front pushes offshore some cooler, drier air will settle into Maine ending our long streak of "the muggies".(P.S. I say the muggies in the most mocking-weathermen-always-say-this kind of way)