Two low pressure systems will be passing through the area between today and the beginning of next week, bringing some cold air and a couple of chances for precipitation over the weekend. The first system is moving eastward from its current position over the Great Lakes and is likely to arrive on Friday, bringing a chance for rain on Friday afternoon and evening, and temperatures below freezing overnight.
After an extended period of spring-like conditions, winter is returning to the Cambridge area. Today between three and eight inches of snow is expected to fall as a low pressure system moves northward along the eastern seaboard. As Massachusetts will be on the northwestern flank of the system as it moves by, there will be snow — with the possibility of large quantities depending on the path of the system. The National Weather Service has announced a winter storm warning for today. After the storm passes, temperatures should be cool, especially overnight, and the skies should be relatively clear.
After the recent passing of a low pressure system, high pressure over the eastern U.S. will dominate the weather through the end of the weekend, leading to clear skies and similar temperatures each day. Lows each night will dip down to around freezing under the clear skies. Daily highs will be in the low-to-mid 50s (°F). The relatively dry air will be a change of pace from the weather of this past week. Early next week, the chance for another low pressure system returns.
A cold front passing over the eastern U.S. will bring with it some rain and wind to end the week here in Cambridge and some cold overnight lows through the weekend. While we won’t be getting the chance of snow and Arctic air that will intrude down into the Midwest, we should have a chance to see the thermometer readings drop below freezing for the first time this month. Saturday will be the best day to go outside, with clear skies and quieter winds than the rest of the week.
There will be a lot of variability in Cambridge’s weather through the weekend as we experience a few different frontal passages. A warm front passing through will bring very warm weather this afternoon, with the high reaching into the low 70s °F. The warmth will be short-lived, however, as a cold front moves through tomorrow, dropping the high down to the mid 50s °F and the overnight low to around freezing. There is a chance of rain this evening and the possibly more rain on Sunday.
Mild temperatures and a chance of rain will be the norm through the end of the weekend. It will be noticeably cooler than the beginning of the week was, with rain likely at some point over the weekend.
The summery weather will continue through the weekend in Cambridge as a Low over Ontario brings warm southern air our way through Sunday. The chance that this will bring some spots of rain over the weekend is low, but non-zero. The weather we are getting this week is a little warmer than average for May, so don’t burn your spring clothes just yet.
High pressure over the eastern half of the U.S. and a Low passing along the Canadian border will keep daytime temperatures steady in the mid to high 50s (°F) and nights in the high 30s (°F) through the weekend in Cambridge. There will be clouds and moderate to strong winds but little chance of precipitation. To the West, however, the Great Lakes region likely received some snow last night and will get some mixed precipitation today. To the north, Vermont, New Hampshire, and Maine will likely get showers today.
High pressure over the Midwest is keeping the forecast for the northeastern part of the country mercifully precipitation-free. Considering the troubles that we have had trying to find a place to put all of the snow that has fallen, a week or string of 10 days without heavy snowfall is a welcome outlook. Through the end of the weekend, we should have little to no snow and varying levels of cloudiness. Temperatures will probably not venture above freezing until Monday, and overnight lows will be dipping down into the chilly single digits (°F).
The rest of this week promises to be very cold. With high pressure as the norm through the end of the week, the skies should remain relatively clear, and along with cold northerly winds, allow the temperatures to get well below freezing each night. On Friday night, a passing low to the north will bring down cold northern air and result in temperatures dropping into the single digits (°F). After this morning, the chance of snow will be very low until the end of the weekend, when it should get much warmer and possibly rain.
It will be mild and rainy throughout the day tomorrow, with up to an inch of precipitation expected to fall. The rain is likely to start a couple of hours after midnight tonight, and continue into the early morning on Sunday. Colder temperatures will return on Sunday and continue into the early part of next week, with a chance of rain or wet snow on Monday and Tuesday.
For most of the country, the last week has been exceptionally cold as a frigid Canadian air mass left many of the states between the Great Lakes and the Rockies with snow cover and a reminder that colder weather is approaching. The Great Lakes region could see some lake-effect snow today as Northwesterly winds blow cold air over the relatively warm lake water. The signs of winter will also be apparent in the Cambridge area as it is likely to snow in the early morning today and temperatures will dip below freezing tonight and tomorrow night. The highs this weekend aren’t likely to get much higher than 40°F, and the moderate Northwesterly winds will make it feel colder still. It’s time to get used to these temperatures, as next week doesn’t project to be much warmer.
A cold and rainy weekend is in store for the Boston/Cambridge area as a low pressure system rides Northward just off the coast. On Saturday and Sunday, temperatures will likely top out in the mid 40s (°F) and will likely drop below freezing on Sunday night. There is a very good chance of rain on Saturday, with up to half an inch possible, depending on the path the off-shore storm takes.
The warm weather of the past few days is likely to end overnight on Saturday as cold air is brought down behind a Low passing across the Eastern Canadian provinces. Today and Saturday are likely to have warm highs in the lower 70s (°F) before Sunday’s colder high in the lower to mid 50s (°F). There is a chance that Cambridge will see showers on Saturday afternoon, but nothing like the rainfall from yesterday.
There is a chance of rain this weekend as a Low in the Great Lakes region sweeps cold air in our direction. The most rain (up to 0.50 in) is likely to hit late in the evening Saturday and pass by Sunday morning, so don’t completely write off your outdoor weekend plans yet. Clear skies and a moderately warm day (mid/upper 60s °F) should follow the wet weather on Sunday. This kind of weather associated with the passing of fronts is likely to be the norm over the coming weeks.