DAYS 1-5 (AUGUST 13-17)<\/p>\n\n\n\n
A cold front will slide off the coast by midday today. This front will produce additional showers and possibly a few thunderstorms east of I-95 in general, mainly southeastern MA. Behind this front, drier air will work in, but there’s just enough instability left behind the front that the “mostly fair” weather cumulus clouds that pop up can grow adequately to produce a few showers here and there as the afternoon goes on, even as late as sunset. However, the coverage of that activity will be very low – not enough to worry about scrapping outdoor plans, but just enough to keep an eye on the radar “just in case”. Tonight, cooler, dry air moves in and you’ll notice it if you’re outside or have the windows open. While clouds thwarted many folks’ view of the peak night of Perseid meteors late last night \/ early this morning, tonight, while there will be a lower meteor count, viewing conditions will improve if you want to catch the end stage of the show. Again, best time to see them is after midnight, facing N & NE, away from light pollution. Monday will be a nice mid August day with a sun\/cloud mix and low humidity. We’ll have diurnal cumulus clouds pop up in response to solar heating and cool air aloft, and also some higher clouds will start to move in during the afternoon ahead of the next approaching low pressure area. As the small high pressure area that gives us our nice Monday moves away, low pressure will head for northern New England via the Great Lakes, and its warm front will bring heavier clouds and a round of showers late Monday night \/ early Tuesday. Some heavier thunderstorms may occur toward the South Coast with this where it will be more unstable with more moisture available. Tuesday during the day we should spend some time in the warm sector behind a warm front and ahead of a cold front, but it looks like clouds will be dominant so I’m not expecting full destabilization of the atmosphere enough to cook up big thunderstorms. It looks like a more general shower set-up with embedded heavier downpours and storms possible. It’s also possible that the frontal boundary doesn’t make all that much progress northward and a wave of low pressure forming along it then pulls it back to the south. This set-up would result in my forecast temperatures below being too high. Based on that, keep in mind that if this looks like a more likely scenario for the next update, that temperature forecast may be noticeably lower than it is now. I’ll do a finer-tune on this outlook for tomorrow’s update. Shower activity may linger into Tuesday evening as the trough will be sluggish to depart. Wednesday, we’re back into drier air with a sun\/cloud mix, and right now I think any pop up showers will stay north of the WHW forecast area. Thursday should start sunny but may end with clouds as the next disturbance approaches from the west, but not a bad day either. And we continue to keep heat generally at bay. You’ll see no 90+ in this forecast.<\/p>\n\n\n\n
TODAY: Partly sunny. Chance of showers and thunderstorm morning and midday, favoring areas east of I-95 and south of I-90, diminishing from west to east. Slight chance of isolated showers during the afternoon and evening. Highs 78-85. Dew point 60+. Wind W 5-15 MPH.<\/p>\n\n\n\n
TONIGHT: Mostly clear. Lows 57-64. Dew point under 55. Wind W up to 10 MPH.<\/p>\n\n\n\n
MONDAY: Sun\/cloud mix. Highs 77-84. Dew point rising back to near 60. Wind variable to S up to 10 MPH.<\/p>\n\n\n\n
MONDAY NIGHT: Variably to mostly cloudy. Chance of showers overnight. Heavier showers and some thunder possible, especially near South Coast. Patchy fog overnight. Lows 61-68. Dew point near 60. Wind SE under 10 MPH.<\/p>\n\n\n\n
TUESDAY: Mostly cloudy. Chance of showers and thunderstorms. Highs 72-79. Dew point 65+. Wind S 5-15 MPH.<\/p>\n\n\n\n
TUESDAY NIGHT: Mostly cloudy with a chance of showers and thunderstorms early, then clearing. Patchy ground fog. Lows 61-68. Dew point 60+. Wind SW 5-15 MPH shifting to W.<\/p>\n\n\n\n
WEDNESDAY: Sun and passing clouds. Highs 78-85. Dew point under 60. Wind W 5-15 MPH.<\/p>\n\n\n\n
WEDNESDAY NIGHT: Clearing. Lows 58-65. Dew point falling to near 50. Wind W under 10 MPH.<\/p>\n\n\n\n
THURSDAY: Sun followed by clouds. Highs 77-84. Dew point 50s. Wind variable up to 10 MPH with coastal sea breezes.<\/p>\n\n\n\n
DAYS 6-10 (AUGUST 18-22)<\/p>\n\n\n\n
Medium range model disagreement always makes forecasting this period with the help of guidance “fun”. Right now I’m leaning toward a faster flow pattern with a shower \/ thunderstorm chance the first half of August 18 followed by a drying trend, fair weather much of the August 19-20 weekend but possibly ending unsettled with the next disturbance moving in, then fair weather returning again to end the period. Some guidance wants to bring heat in while other guidance says Canadian air will be more dominant. Splitting the difference for now with a forecast of near to slightly above normal temperatures but the opportunity for brief heat shot later in the period.<\/p>\n\n\n\n
DAYS 11-15 (AUGUST 23-27)<\/p>\n\n\n\n
A weaker westerly flow with near to below normal precipitation and near to above normal temperatures for late August.<\/p>\n","protected":false},"excerpt":{"rendered":"
DAYS 1-5 (AUGUST 13-17) A cold front will slide off the coast by midday today. This front will produce additional showers and possibly a few thunderstorms east of I-95 in general, mainly southeastern MA. Behind this front, drier air will work in, but there’s just enough instability left behind the front that the “mostly fair” … Continue reading Sunday August 13 2023 Forecast (8:24AM)<\/span>