This evening we are tracking showers and thunderstorms that are expected to move across sections of western Massachusetts with some having locally heavy downpours. Expect a cloudy night with a good chance of a few showers and possibly a thunderstorm rolling through the area. It remains warm and muggy with temperatures only falling to the upper 60s to 70 degrees.
With a warm front stalled to our north we can expect to remain in the warm and humid air mass through Labor Day. Low pressure will move across northern New England overnight and be positioned near the Maine coast by Sunday afternoon. The next feature that will impact our weather is a cold front, located this evening in the upper Plains States, that will move slowly eastward as low pressure traverses southern Ontario. On Tuesday the low will be in southern Quebec, dragging the cold front through New England. Until then the area remains warm and humid, with drier air and clearing skies following on Wednesday.
Showers and a few thunderstorms remain a threat through the holiday weekend. As we mentioned last evening do not expect much in the way of sun this weekend, perhaps a cameo appearance here and there, otherwise we are locked into the clouds into Tuesday. Monday will likely be the wettest of the next couple days as the cold front approaches and pushes into the warm and moist air to its east. Numerous showers and thunderstorms are likely on the holiday.
The front moves east of our region by midday on Tuesday and that is when conditions begin to improve. Although skies will be slow to clear out and a shower or thunderstorm may cross the area during the day by later Tuesday night the drier and more comfortable air mass will start to overspread greater Springfield and the Pioneer Valley.
Canadian high pressure will take over during Wednesday and bring a refreshing air mass, with much lower humidity and cooler temperatures. A slight hint toward the end of the week, it could be quite cool at that time as another cold front approaches with a reinforcing push of cool Canadian air.
Four Day Forecast:
Sunday through Monday night: Showers and a few thunderstorms, otherwise generally cloudy skies. Slight chance of a peek of sun. A few locally heavy downpours are possible. Areas of fog in the morning and again late night. Warm and Humid. High temperatures in the low 80s. Overnight lows in the upper 60s to 70 degrees Sunday night to mid and upper 60s Monday night. Light south winds under 10 mph.
Tuesday: Mostly cloudy with a chance of a shower or thunderstorm. Highs about 80.
Tuesday night: Partly cloudy, less humid and cooler. Lows in the 50s.
Wednesday: Sunshine, with some afternoon clouds. Pleasant, highs in the upper 70s.