A large, intense and complex storm is going to affect the region through tomorrow morning and with it strong and possibly damaging winds. There are actually going to be two low pressure systems impacting the forecast and eventually these will merge into one large system early tomorrow morning.
The first low pressure area brings a period of rain from about late morning through early evening. I am expecting 10-12 hours of rain, but not an exceptional amount of it. Areas west of Boston will just under to near an inch of rain from this afternoon through the early evening. The map below shows rainfall totals through 10PM. Notice south of Boston is predicted to see the most amount of rainfall nearing two inches. If you are going out for dinner tonight bring the rain gear.
There will be a break in the rain by about 9PM to 11PM, before a second batch of precipitation moves north for early Sunday. It is this second batch of precipitation that will bring with it a chance of snow. This situation is very borderline for snow. There could as little as just a few wet flakes mixing in with the rain on Sunday morning or as much as a slushy accumulation of an inch on the grass, car tops and soil. This isn’t going to turn into a snowstorm, but for some of you a first look at the white stuff this winter season.
The rain and possible snow ends later in the morning and early afternoon. The precipitation will be done for the Patriots game, but the winds and the chill will remain through the 4th quarter.
There is a high wind warning up for Cape Cod and the Islands and a wind advisory for areas around Boston. The map below shows where the wind issues are likely to occur. I do expect winds to be strong enough with this system to create some power outages. Winds may gust up to 60 miles per hour along parts of Cape Cod and the Islands.
Coastal flooding will be minor and there will be beach erosion. The good news is winds are more north/northeast and not quite as long of a fetch over the water as some storms. It still means north and east facing beaches will see the most erosion.
We haven’t had a weekend this chilly since early March. Highs today and tomorrow will remain in the lower and middle 40s. The cold air the reason snow is in the forecast for early Sunday as the storm pulls east of the region.
Many areas will have a hard freeze Monday morning. If you have not brought plants inside or picked the final tomato of the season I highly recommend getting out there today.
Sunshine returns for Monday along with cold air continuing. Highs stay in the 40s. A warming trend takes place for the middle of the week. Another storm could affect the region late next week or perhaps early in the weekend.