Monday is the last day of March and also the last day of a 2 1/2 day stretch of nasty weather, courtesy a slow-moving low pressure area that has crawled up the East Coast along a frontal boundary over the weekend. It will slowly wander out to sea later Monday and Monday night, but as it starts its departure, enough cold air working around its back side will cause some mixed showers (rain/sleet/snow). Only minor brief accumulations of sleet/snow may occur where showers concentrate for a while, mainly inland and higher elevations, during the day on Monday. It won’t be cold enough at the surface to allow anything that falls to stay on the ground. And anything that does sit for a while would do so on unpaved surfaces.
A nice break comes on Tuesday as we get some sunshine and a little milder air due to a narrow area of high pressure extending down across the region. But with the tendency for high pressure to be centered to the north of the region and a frontal boundary still hanging around to the south and east, it seems that clouds will try to make a comeback by Wednesday, and we may see the winds turn more north or east, tempering any warm-up. As most Spring forecasts are, this one is a little iffy as we move through the week. I’m feeling a little more optimistic about Thursday, not because we get a warm push from the south, but because the high to the north is a bit stronger and pushes things back to the south. So based on that idea I’ll go optimistically for some sun but below normal temperatures. This may hold into Friday, an important day for Red Sox fans as it is the home opener (2PM). By later Friday, clouds should be advancing ahead of a northeastward push of low pressure which is likely destined to make the next weekend unsettled (wet and cool Saturday, breezy and cool but drying out Sunday). Again, this is somewhat low confidence. There will be plenty of fine tuning to come.
For now, here’s the best guess for southeastern New England…
OVERNIGHT: Overcast. Areas of fog. Periods of rain and drizzle. Some rain may be heavy. Lows 35-40. Wind N 10-20 MPH with higher gusts.
MONDAY: Cloudy. Periods of rain showers except some sleet/snow at times especially inland and north/northwest of Boston where brief minor accumulation may occur. Temperatures steady 35-40. Wind N 10-20 MPH with gusts around 30 MPH.
MONDAY NIGHT: Mostly cloudy with a chance of rain or snow showers early, followed by partial clearing. Lows 30-35. Wind NW 10-20 MPH with higher gusts.
TUESDAY: Partly cloudy to mostly sunny. Highs 45-50. Wind W 5-15 MPH.
WEDNESDAY: Mostly cloudy. Low 33. High 55 except cooler coast.
THURSDAY: Partly sunny. Low 35. High 50 except cooler coast.
FRIDAY: Increasing clouds. Chance of rain at night. Low 35. High 50 except cooler coast.
SATURDAY: Cloudy. Periods of rain. Low 40. High 45.
SUNDAY: Breaking clouds, windy. Low 35. High 45.