8:40AM
DAYS 1-5 (MAY 4-8)
A frontal boundary lingering nearby and a passing disturbance keeps rain showers scattered in the region this morning before a little push of high pressure from the north sends drier air into the region this afternoon, not really clearing the sky too much but ending the rain shower threat. Now there remains some bad news / good news regarding this pattern. The bad news is the parade of weather systems continues for now and that sends the next wet weather system toward the region for Sunday, although the most significant rainfall from this wave of low pressure will fall to the south of I-90 (The Mass Pike), while to the north the period of rainfall may be of somewhat shorter duration. And then a bit of a change. High pressure from Canada slides down into the region Monday, which is going to be a very nice spring day. The sinking of high pressure to the south and the approach of a cold front from the northwest may sound like “uh oh here comes more rain” upon first read but it’s actually going to help create a fabulous day for most of the hours of it, the clouds and threat of rain showers probably holding off until at least the very end of the day, if not at night, then progressing northwest to southeast across the area. Another Canadian high pressure area is expected to bring cooler but again fair weather for the end of this period.
Forecast details…
TODAY: Overcast morning with patchy fog and scattered to isolated rain showers diminishing west to east. Mostly cloudy this afternoon but some breaks of sun possible especially northern half of MA and southern NH. Highs 53-60 coast, 61-68 interior. Wind light variable.
TONIGHT: Mostly cloudy. Slight chance of rain favoring areas west and and south of Boston toward dawn. Lows 45-52. Wind N to E up to 10 MPH.
SUNDAY: Cloudy. Periods of rain much of the day southern MA southward and a shorter period of rain favoring late morning to late afternoon northern MA and southern NH. Highs 55-62 except cooler coast. Wind E 5-15 MPH.
SUNDAY NIGHT: Mostly cloudy with rain ending evening. Clearing overnight. Lows 45-52. Wind N 5-15 MPH.
MONDAY: Mostly sunny. Highs 63-70 except 56-63 coast, coolest Cape Cod. Wind N up to 10 MPH becoming variable with sea breezes.
MONDAY NIGHT: Partly cloudy. Lows 45-52. Wind light W.
TUESDAY: Partly cloudy. Highs 55-62 Cape Cod, 63-70 other coastal areas, 70-77 interior. Wind SW 5-15 MPH.
TUESDAY NIGHT: Mostly cloudy. Scattered rain showers. Lows 50-57. Wind W 5-15 MPH shifting to NW.
WEDNESDAY: Partly to mostly sunny. Highs 55-62 coast, 62-69 interior. Wind light variable with sea breezes.
DAYS 6-10 (MAY 9-13)
We’re seeing a shift to less frequent systems while still having an active pattern. Wet weather threat comes late May 9 and May 10 from a broad low pressure area. A minor system may threaten at the end of the period.
DAYS 11-15 (MAY 14-18)
Feeling the medium range models don’t have a great handle on the pattern evolution. For now I’m on the lookout for a cut off low somewhere but uncertain as to whether it happens at all, and if so, how it impacts our weather. Will re-evaluate this again tomorrow. Initial feeling is that we start this period dry, end it dry, and see some wet weather in between.