Let’s Dew this ! Go go go!
Monday to Tuesday...
A quasi-stationary upper low will slowly make its way into
southern New England in the early morning hours Monday, bringing
with it some general chances for showers. Chances for some
isolated thunderstorms look to start during the daytime hours
and could go into the evening. Rain chances linger throughout
the night, though, going into Tuesday where thunderstorm chances
return with daytime heating and southerly flow bringing up more
moisture to amp up instability a bit. High temperatures Monday
look to be in the upper 70s/lower 80s and dewpoints start to
climb back into the upper 60s, reaching the lower 70s Tuesday.
Highs Tuesday also look to be in the 80s, so the hot and humid
conditions will be returning.
The low looks to be moving out of our area Tuesday, but rain and
thunderstorm chances remain as another trough progresses east,
encouraging continued S to SW flow.
Wednesday through Saturday...
Another upper level trough moves east from the Great Lakes. Rain
chances become a daily presence through the rest of the week,
alongside higher temperatures and dew points, which look to be
sitting soundly in the 70s. Guidance -- both probabilistic ensemble
and deterministic -- has PWATs elevated close to 2" (with the ECMWF
being a bit more aggressive indicating PWATs up to 2.3" in some
spots along the South Coast) going into Wednesday and Thursday. This
looks to encourage possible heavy downpours around SNE. Diurnal
instability also favors these showers and storms primarily during
the afternoon and evening hours. Some of the guidance indicates
higher chances for showers and storms across interior MA on
Thursday, which will be something to monitor. Overall, looks to be
quite uncomfortable once again with heat indices possibly reaching
the mid to upper 90s for most of our area.