Metro Boston, North Shore and western suburbs: A blast of heat on Wednesday drove temperatures well into the 90s during the afternoon. Boston recorded its first 90 or higher reading since July 20th belting out a high of 97 degrees. You might have thought that would be a record for the date but it was not. The record is 99 degrees set in 1983. Overall the temperatures averaged out about 23 degrees above normal. When adding in the high dew points it pushed the heat index, or real feel temperature, over 100 degrees for a few hours in the afternoon.
We do remain in the very warm and humid air mass into Thursday. As a cold front slowly approaches the area it will be a day of heat and humidity once again, although not as hot, but it will also feature an increasing threat for showers and thunderstorms in the afternoon, becoming more widespread Thursday night as the front closes in. There is a chance that some of the storms could become strong to severe with gusty winds and heavy rain.
The front will move off the coast early on Friday and behind the front a more refreshing air mass will introduce itself to the area. Not only cooler but also less humid as the day wears on. However, showers and storms are likely to linger through the morning, possibly a spot shower into the afternoon.
The cooling trend starts to take hold Friday night as the front moves well offshore. A large high pressure system moves southeastward out of Canada and brings us fair skies and below normal temperatures over the weekend.
Four Day Outlook:
Thursday: Morning sunshine, followed by mostly cloudy in the afternoon with a chance of scattered showers and thunderstorms developing. Continued humid. Not as warm with the high temperatures 84 to 88 degrees. South to southwest winds gusting to 25 mph.
Thursday night: Showers and thunderstorms likely. Chance of heavy downpours and gusty winds with any stronger storms. Muggy, lows 64 to 68. Southwest winds 10 to 20 mph.
Friday: Showers and chance of a thunderstorm in the morning, remaining mostly cloudy through a good part of the day. Turning cooler and gradually less humid. Highs 72 to 76. Winds becoming west to northwest 8 to 15 mph.
Friday night: Partly cloudy, cooler and less humid. Lows 47 to 53, coolest inland.
Saturday: Mostly sunny, with some afternoon clouds. Cool, highs 65 to 69.
Saturday night: A few clouds and cooler. Lows 40 to 46, coolest inland.
Sunday and Sunday night: Partly sunny and slightly milder. Highs 68 to 73. Becoming mostly cloudy overnight, lows 49 to 55, coolest inland.