Severe Storm Potential
Posted by Chris Lambert
***Severe thunderstorm watch in effect until 10:00PM from Boston, points north and west.***
***Flash Flood Watch in effect until Midnight for most locations along and outside I-95***
A severe thunderstorm watch means that any thunderstorm through the afternoon, into the evening, will be capable of produce wind gusts in excess of 60mph and quarter size hail. A flash flood watch means any thunderstorm will also be capable of producing torrential rains that create street and poor drainage area flooding.
Although it's not quite as hot as yesterday, there's still plenty of warmth, humidity and instability this afternoon and evening to fire off those summer-like thunderstorms as a cold front approaches from the west and acts to trigger storm development (there's also a trough of low pressure out ahead of the front too helping kick off the early afternoon storms).
Giving the overall pattern, most storms this afternoon, at least until 5:00PM or so, will favor locations outside 495. Along with the wind gust and hail threat, torrential rain and frequent cloud to ground lightning will also be factors. As the trough of low pressure and front get closer to the coast, a few storms start making their way closer to the coast this evening, and could be locally strong to severe. The dinner-time and early evening storms along the 95 stretch, to the coast, will be hit or miss, while the overnight storms are more widespread. Any time after 10:00PM, the instability of the atmosphere diminishes enough to where the severe threat is lower, but heavy rain and lightning are certainly a possibility.
Heading to Gillette? It's a close call timing wise. Looks like many of the tailgating hours, and even kickoff is dry (can't rule out a passing shower or storm), but there is a better chance for showers and storms in the second half and then overnight in Foxboro. My best advice... expect a warm and muggy night and keep the rain jacket on standby.
Showers and storms continue tomorrow morning with locally heavy rain early before drying out, cooling down and lowering the humidity for the weekend.
I'll do my best to keep you updated through twitter today @clamberton7. Also, the 7Weather App is great for tracking storms.