6:41AM
DAYS 1-5 (JULY 4-8)
Happy Birthday USA! A typical July summertime pattern will be in place throughout the period, dominated by zonal (west to east) flow of a weak jet stream. A southwesterly surface flow will bring summertime heat and humidity (not extreme) into the region today and Friday, and it will become more humid Saturday ahead of a cold front which will move across the region Saturday night, when the greatest threat of showers and thunderstorms is, although the threat itself may not be all that great. Nevertheless with so many outdoor activities ongoing and still a lot of fireworks displays scheduled for Saturday night, we need to pay attention to that threat, as you don’t need severe storms to result in danger from wind gusts, lightning, flooding, etc. By Sunday, the front will be south of the region and we’ll have turned somewhat cooler and drier, but with some lingering cloudiness and maybe a shower near the South Coast. High pressure builds in with fair weather for Monday.
Forecast details…
TODAY (INDEPENDENCE DAY): Mostly sunny. More humid. Highs 80-87 coast, 87-94 interior. Wind light SW with light coastal sea breezes.
TONIGHT: Mostly clear. Humid. Lows 64-71. Wind light SW.
FRIDAY: Partly cloudy. Humid. Highs 81-88 coast, 88-95 interior. Wind SW up to 10 MPH but some light coastal sea breezes possible.
FRIDAY NIGHT: Partly cloudy. Humid. Lows 66-73. Wind SW 5-15 MPH.
SATURDAY: Partly cloudy. Isolated afternoon thunderstorms. Humid. Highs 88-95, cooler Cape Cod. Wind SW 5-15 MPH.
SATURDAY NIGHT: Variably cloudy. Scattered to isolated showers and thunderstorms. Humid. Lows 66-73. Wind variable 5-15 MPH.
SUNDAY: Variably cloudy. Risk of a shower near the South Coast. Less humid. Highs 77-84. Wind light N.
SUNDAY NIGHT: Partly cloudy. Lows 55-62. Wind N 5-15 MPH.
MONDAY: Mostly sunny. Highs 77-84. Wind light variable with coastal sea breezes.
DAYS 6-10 (JULY 9-13)
Overall west to east jet stream pattern. Fair, warming, increasingly humid July 9-10 as a southwesterly surface flow returns. Cold front brings showers/thunderstorms July 11. High pressure returns with fair weather and lower humidity July 12-13.
DAYS 11-15 (JULY 14-18)
Essentially a continuation of the same pattern with the rough timing of the next shower/thunderstorm threat around July 15-16.