We hit 90 degrees again today at Westover in Chicopee, making it an official heat wave. Temps will again return to the low 90s Thursday along with higher dew points-bringing a heat index to near or above 100 degrees. A Heat Advisory has been issued for the Pioneer Valley from 11am to 7pm. Thursday will be a First Warning Weather Day as a few strong thunderstorms are possible as well. Tonight, we stay warm and muggy with clearing skies. Some patchy fog is possible again overnight, but should burn off quickly in the morning. Temperatures rise fast under a mostly sunny sky and highs should get into the middle 80s in the Berkshires to lower 90s in the valley. Heat indices will again approach triple digits-similar to what we saw on Labor Day. By the afternoon, showers and storms become more likely as a cold front comes into the area. We have a marginal severe weather risk for Thursday afternoon and evening in western Mass. Scattered to isolated showers and thunderstorms should move through after 2pm with downpours and lightning. One or two storms could become strong or severe with damaging wind gusts of 40 to 60 mph, but chances of seeing one are quite low. After about 10pm, our weather will quiet down, but some spotty showers could linger into Friday morning. A pattern shift is on the way starting Friday and lasting through Monday of next week. Our ‘heat pump’ ridge will break down and a trough moves into the Northeast for a few days in the upper levels. We will also see surface high pressure move across southern Canada with good dry and even fall-like air. Expect dew points in the 40s, daytime temps in the 70s and overnight lows possibly dipping into the 40s! Dew points rise Monday night as a warm front comes in from the west. Remnants of Gordon will be with this system, so some downpours and tropical-feeling air is looking likely for Monday night and Tuesday. We will need to keep an eye on the Atlantic coast for hurricane Florence, which could cause some issues by mid to late week as it nears the US.
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