As we reach the halfway point of the year, we also have Canada Day and Independence Day this week, so whichever you celebrate, enjoy as we’ll have some typical summertime weather for much of the upcoming week.
We start the week off with high pressure offshore resulting in a very warm to hot day today with increasing humidity levels as winds shift into the southwest. Tuesday looks like another warm and very humid day with dewpoints getting well into the 70s, but with an approaching cold front, we’ll see clouds and probably two rounds of showers and thunderstorms. The first batch likely moves through during the morning hours, but it’s the second batch that we’re keeping an eye on. The potential exists for some of the storms to become strong to severe, but that will depend on several factors. If we can get any sunshine after the first batch of storms, it will help to destabilize the atmosphere, whereas if it stays cloudy and thus cooler, the cold front will just produce some showers with only a few rumbles of thunder. We are expecting some sunshine to develop, so the other important factor is the timing of the front. A front that arrives late afternoon, during the maximum heating of the day will be more likely to produce severe weather than a front that arrives during the evening, when we are past the max heating of the day. Any storms that do form could produce heavy downpours and strong winds.
Behind the front, high pressure builds back in with drier and more seasonable conditions for Wednesday and Thursday as highs will be mainly in the 80s, with dewpoints dropping into the 50s and lower 60s. Another disturbance may trigger a few showers and thunderstorms late Thursday, but high pressure returns for the Fourth of July and into Saturday with some spectacular summer weather, which shouldn’t cause any problems for any outdoor holiday celebrations. Another system could move in for Sunday, but that’s far from certain at this point.
Monday: Some morning fog, otherwise partly to mostly sunny, humid. High 84-91, cooler along the coast and across Cape Cod.
Monday night: Becoming partly to mostly cloudy with fog redeveloping, especially along the coast. Some showers and thunderstorms are possible towards daybreak. Low 63-70.
Tuesday: Some showers and thunderstorms possible early, then intervals of clouds and sunshine, showers and thunderstorms may redevelop late in the day, breezy, very humid. High 82-89, cooler across the South Coast and Cape Cod.
Tuesday night: Showers and thunderstorms ending, some clearing after midnight. Low 64-71.
Wednesday: Becoming mostly sunny, less humid. High 81-88.
Wednesday night: Clear skies. Low 61-68.
Thursday: Sunshine and some afternoon clouds, chance for a late-day shower or thunderstorm. High 83-90, cooler across Cape Cod.
Thursday night: Chance for a shower or thunderstorm in the evening, otherwise becoming clear to partly cloudy. Low 59-66.
Friday: Mostly sunny, drier. High 76-83.
Saturday: A mix of sun and clouds. High 79-86.
Sunday: Partly sunny, more humid, breezy, chance for a few showers or thunderstorms. High 86-93, cooler across Cape Cod.
Storm HQ 