DAYS 1-5 (AUGUST 1-5)
August arrives. The final month of meteorological summer will start out in typical fashion, seasonably warm, a little more humidity coming in, plenty of rain-free time but also some rain chances during its opening five days, but those rain chances will be rather limited with a hint of uncertainty. First, we get through 99% of today’s daylight without any rain threat, but we have two systems approaching us from the southwest, one that is going to pass to our northwest and another that is going to pass to our southeast but close enough to produce a generally light rainfall this evening and tonight. However, a swath of heavier rain is expected near the South Coast of RI and especially over the South Coast region of Massachusetts including Cape Cod. This is one place where rain is actually needed as they have been dry there. Elsewhere, there is certainly no dire need for rain and there won’t be much. These system exit Monday and other than a very light chance of a brief pop up shower on a weak trough line passing through, it will be a dry day. High pressure builds in for more dry weather Tuesday and will try to hold through Wednesday as well, but there will be a frontal boundary not far to the south and a little wave of low pressure will try to drag that close to or possibly into the region by Wednesday. For now, keeping this day rain-free, but can’t rule out some rain getting into at least the South Coast and/or eastern MA/RI, depending on how it evolves. So this part of the forecast may be adjusted. This boundary is also expected to hang near the region Thursday as well with better chances for shower activity, again favoring eastern areas. Details of that mid week shower threat will need to be fine-tuned.
TODAY: Mostly sunny morning. Partly sunny afternoon. Highs 75-82. Dew point rising toward 60. Wind S 5-15 MPH.
TONIGHT: Mostly cloudy. Chance of showers and possible thunderstorms. Heaviest rainfall South Coast of RI/MA especially Cape Cod. Areas of fog. Lows 61-68. Dew point lower to middle 60s. Wind SW 5-15 MPH.
MONDAY: Partly sunny. Chance of a brief passing shower or thunderstorm. Highs 77-84. Dew point near 60. Wind W up to 10 MPH.
MONDAY NIGHT: Mostly clear. Lows 61-68. Dew point near 60. Wind variable under 10 MPH.
TUESDAY: Mostly sunny. Highs 77-84, coolest coast. Dew point near 60. Wind variable up to 10 MPH with light coastal sea breezes.
TUESDAY NIGHT: Partly cloudy. Fog patches forming. Lows 62-69. Dew point lower 60s. Wind S up to 10 MPH.
WEDNESDAY: Partly sunny. Highs 76-83, coolest South Coast. Dew point middle 60s. Wind S 5-15 MPH.
WEDNESDAY NIGHT: Variably cloudy. Chance of showers favoring RI and eastern MA. Patchy fog. Lows 63-70. Dew point middle 60s. Wind S 5-15 MPH.
THURSDAY: Variably cloudy. Chance of showers, favoring RI, eastern MA, and southeastern NH. Highs 75-82. Dew point middle to upper 60s. Wind variable 5-15 MPH.
DAYS 6-10 (AUGUST 6-10)
A southerly air flow will bring additional tropical moisture and an accompanying disturbance will result in a better chance of showers August 6. Warm and humid south southwest flow with a few diurnal showers and thunderstorms possible otherwise mostly rain-free for the August 7-9 time frame before a disturbance from the west brings a better chance of showers and thunderstorms by period’s end.
DAYS 11-15 (AUGUST 11-15)
Air flow becomes more westerly with some up and down temperatures but no lasting major heat expected. A couple shower/thunderstorm opportunities but most of the time looks rain-free.