We Did it Again...
I went away for a few days and what do you know, I miss some of best weather of the year. For the second day in a row, Boston hit 71 degrees...the difference today, no record...that still stands at 73 set back in 1990. A weak coldfront is advancing in from the west tonight. This will pass by morning with an isolated shower and slightly cooler air but it will provide another offshore breeze for half of the day and temps will respond nicely to around 60. Big changes arrive late in the day, a backdoor coldfront will slide down from the Maine Coast after 4PM...first chilling down the North Shore, then Boston then points south and east. This temp drop will be alarming...we will go from a mid-afternoon high of 60 to around 40 just after sunset. There will also be low-level moisture working in off the ocean too...this means many coastal towns will see low clouds or a fog bank slide in and drizzle will be possible late in the evening and tomorrow night. On the Thursday, the cooler air will have a tough time penetrating through Central MA and into Western MA...in fact, while highs will be in the 40s along the coast, 50-55 will still be seen through the interior as the shallow cold air mixes with the retreating warmth. The low clouds that will be present tomorrow night will burn off across the interior also adding a better warmup inland...at the coast they will have a tougher time burning off. By Thursday night marine air will start winning the battle across the interior as well. A strengthening area of high pressure just offshore and an approaching warmfront will provide a stronger gradient for onshore winds to develop and chill us down to the lower 40s for Friday even well inland. The onshore component will also saturate the lower levels and drizzle, occasional showers and mist will around most of the giving us that raw, damp feel.
By midday Saturday, high pressure from southern Canada will have successfully shoved the moist frontal boundary south of New England and sunshine will burst out for St. Paddy's Day. Temps will still have a bit of a chill along the coast with a seabreeze but inland, upper 50s will be attainable...really nice! As the high slides offshore, SW winds will take ahold of New England again and temps will shoot up through the 60s and into the 70s again early next week.
