Forecast discussion: Like an old Glenn Frey song, the heat was on in Boston, and the entire region of Eastern Massachusetts, on Thursday. Humid, tropical air moved into the state this afternoon, and it will remain with us throughout the next few days.
A strong high pressure system out in the Atlantic is giving us southwest winds, which is helping to bring this air mass up into New England. We will remain with west-southwest winds tomorrow, and temperatures will reach the lower 90’s inland. Due to the heat, an Air Quality Alert will be in effect for all areas south and east of Boston, including the Cape and Islands, Friday from 11 a.m. until 11 p.m. We did reach a high of 88 degrees at Logan Airport today, so a heat wave is unlikely. The coastline will be cooler, thanks to the onshore breeze. Temperatures are expected to reach the lower 80’s.
By Sunday, a cold front that has spawned more tornadoes today in the Central Plains will begin to move eastward. We should see limited sunshine throughout most of the day, but I am expecting showers to develop around sunset. Some areas may see heavy periods of rainfall during the overnight.
The front will push through by Monday evening, and will slowly move offshore on Tuesday. We may see some lingering clouds throughout the day, as the high in the Atlantic slows down the movement of the cold front. A new high pressure system out of Canada will help bring back drier air over us, as well as return us back to seasonable temperatures. Highs will be in the middle 70’s from Tuesday until Thursday.
72 hour forecast:
Tonight: Partly to mostly cloudy with patchy fog developing. It will be warm and humid with a low of 69.
Friday: Mostly sunny, hot, and humid with a high of 92. Winds will come from the west-southwest at 12-15 mph.
Friday night: Partly cloudy and humid with a low of 69. Winds will come from the west-southwest at 9-13 mph.
Saturday: Mostly sunny with a high of 90.
Saturday night: Partly cloudy with a low of 66.
Sunday: Partly sunny by the afternoon with a high of 87.
Sunday night: Showers developing near sunset with a low of 64. Showers will become moderate to heavy rain in isolated areas.
Monday: Showers/rain. Highs 73-76, lows 55-58.
Tuesday: Showers/rain until the early morning, with partly to mostly sunny skies by the afternoon. Highs 70-73, lows 52-55.
Wednesday: Mostly sunny. Highs 72-75, lows 51-54.
Thursday: Mostly sunny. Highs 71-74, lows 53-56.