Records Highs Will Be Challenged...
Some interior communities hit 90 degrees today, this will be day one of heat wave for them. At the coast, feeble seabreezes kept temps in the lower 80s and even some 70s...unfortunately, seabreezes tomorrow will be highly localized and ineffective...there will be very little relief from the heat anywhere in Southern New England tomorrow or Thursday.
This will be impressive heat, with boundary layer and mid-level temps capable of supporting highs near 100 degrees on Thursday. That is the day when Boston's record will either be tied or broken and if I were a betting man I'd go with broken. Out ahead of the coldfront we will undoubtedly see an offshore wind that will literally roast the coastal plain. The high is 96 set back in 1984.
As far as the thunderstorm threat goes, I don't see any activity tomorrow...there will be a strong mid-level cap thanks to the warming aloft so despite the serious surface heating, the lack of a trigger and the strong cap should prevent any storms from forming. Thursday will be a different story, there will be a trigger marching in from the west the question is the timing of this front. I am hopeful that most of the action will arrive just after sunset and therefore will be in a weakened state but the potential for severe weather will be there.
Much cooler and drier air will work in for Friday and the upcoming weekend but showers may return by Saturday night as well.
