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Another fine day is on the way with plenty of sunshine and still low humidity levels, at least for most of the day. This is going to quickly change tomorrow and Thursday when the air becomes quite humid. Temperatures reach well into the 80s tomorrow but fall back a bit on Thursday due to the cloud cover.
It may be more uncomfortable that day as humidity levels will be so high. A few of your own personal thermometers might nudge 90 for a couple of hours on Wednesday, but I suspect the official Logan Airport reading to stay shy of that mark by a few degrees. As a weather system approaches from the north and west Wednesday night and Thursday, showers and thunderstorms will become increasingly likely. Some of the storms could produce very heavy rain and lightning.
Eventually later Thursday evening the front pushes eastward and drier air will replace the humidity. Currently, Friday and the weekend are looking quite nice with an abundance of sunshine and pleasantly warm temperatures.
Next week will start warm and the humidity will also increase again. There are some signs we might finally see a day or two of 90 degree heat as we close out the month of June and start July. I’ll have more confidence in this part of the forecast as we get closer to that period time.
A warm front will push north of the area later today ushering in a warm and humid air mass. A cold front will then push against this tropical air bringing the necessary forcing to produce showers and storms. The most likely time for these will be Thursday.
Tuesday: Mostly sunny and a bit more humid late in the afternoon. Highs in the lower and middle 80s.
Tuesday night: Mostly cloudy with a shower or storm over central and northern New England. Lows in the upper 50s to mid 60s.
Wednesday: Partly sunny and very warm. Highs of 84 to 88 but 70s over south coast and Cape Cod and the Islands.
Thursday: Showers and thunderstorms likely. Highs in the mid to upper 70s with very humid air.
Friday: Mostly sunny and less humid. Highs in the 70s.
Saturday: Mostly sunny and quite pleasant. Highs of 78 to 83 (coolest on the immediate coast).
Follow updates from David Epstein on Twitter @growingwisdom.