Despite the bursts of snow in parts of Montana down to Parley’s Summit in Utah yesterday, a large chunk of the country sizzled in the 90s and a few spots nearby in New England nudged 90 as well according to the WBZ WeatherBug Network. A squall line of showers and storms crossing NY last evening weakened upon shifting through New England early this morning. The leftovers are shifting offshore so the sky will feature a changeable amount of clouds and sunshine the rest of the day. The timing of a cold frontal passage suggests that there will be a very low risk of additional storm development today except closer to the South Coast of the region. The muggy air early this morning will be replaced by drier air rushing in on a freshening westerly wind gusting up to 15-30 mph by midday through the afternoon.
Although the front will be offshore around midday, the most significant cooling will take place late today into tonight following the passage of a weak secondary front which will contain varying amounts of clouds and perhaps a brief light shower. Consequently, with a very warm airmass in place, the potential still exists for Boston to get its first 90 degrees of the season today but it is a close call. On average, the city’s first 90 of the season occurs on June 8. Last year, it happened on May 31 and the earliest ever was on April 7, 2010. Over the past 25 years, the latest 90 degrees fell on July 14, 1998! Reviewing 2013, I see that of the 18 days at 90 or higher in Boston, there was 1 in May, 4 in June, 12 in July, 0 in August and 1 in September. July contained a 5-day heat wave and a 7-day heat wave. The pattern this season does not favor long heat waves like that.
Once the muggy air is shoved south and east tomorrow, dry air from Canada will rule for several days. Plan on pleasant, comfortable temperatures day and night through the weekend. It should be essentially sunny through that period but there will be a batch of dimming high cloudiness skimming across southern New England tomorrow morning as a wave of low pressure moves across the Mid-Atlantic region with its northern fringe of showers perhaps as far north as southwestern CT. Showers may return to the region the beginning of next week. In the meantime, summer starts with the solstice at 6:51 am on Saturday. Are you ready to celebrate?
You can watch the weathercasts by Danielle Niles on WBZ News through 9 0’clock this morning and Todd Gutner follows on the evening shows. Make it a great day!