You’ve heard us use the phrase “When in drought, leave it out” in relation to rainfall plenty of times. There is a corollary to that phrase – “Droughts end in floods”, which we’re going to use for the next few days.
The front that brought an end to the heat Saturday night has stalled out south of New England, and a wave of low pressure will ride along it over the next day or so. This will result in periods of rain, some of it heavy at times later today into a good chunk of Tuesday, mainly south of the Mass Pike. Many of the forecast models are showing the potential for 2-4 inches of rain, with amounts in excess of 6 inches possible. Pinpointing where these tropical downpours will be the heaviest is a fool’s errand, but that much rain in a short period of time, even with the ongoing drought, will result in areas of flooding. That’s why Flood Watches have been issues for much of Rhode Island and southeastern Massachusetts, as this is where the heaviest rain is expected. The question is, how much rain falls north of the Mass Pike? While there are some models that bring the heavy rain all the way into southern New Hampshire, many of them have the amounts taper off quickly north of the Pike, with little rainfall once you get into southern New Hampshire. With the cloudcover and rainfall, temperatures will be quite cool, with many places staying in the 60s, especially on Tuesday, The showers wind down Tuesday night, then high pressure builds in with gradually improving conditions on Wednesday, though temperatures will remain below normal. Very warm weather returns for Thursday as high pressure moves offshore, with some places getting back to 90. This heat will be short-lived, as another cold front moves through on Friday with some showers and thunderstorms. High pressure brings cooler and drier weather in for Saturday, with temperatures turning a bit warmer again on Sunday.
Monday: Cloudy with periods of rain and showers, mostly south of the Mass Pike. High 69-76.
Monday night: Rain likely, heavy at times south of the Mass Pike. Low 57-64.
Tuesday: Rain during the morning, tapering off to showers in the afternoon. High 64-71.
Tuesday night: Showers ending during the evening, some clearing may start late at night, mainly north and west of Boston. Low 55-62.
Wednesday: Becoming partly to mostly sunny. High 75-82, a little cooler near the coast.
Wednesday night: Clear to partly cloudy. Low 61-68.
Thursday: Sunshine and some afternoon clouds. High 85-92, cooler near the South Coast and Cape Cod.
Thursday night: Partly cloudy. Low 65-72.
Friday: Partly sunny with some showers and thunderstorms likely in the afternoon. High 83-90.
Saturday: Mostly sunny. High 79-86.
Sunday: Partly to mostly sunny. High 78-85.
Storm HQ 