DAYS 1-5 (JULY 4-8)<\/p>\n\n\n\n
Independence Day weather will not be independent of unsettled conditions. But there is good news too! A quasi-stationary trough bisects the WHW as it runs southwest to northeast across the region. There is air convergence along this trough line and with the additional help from an upper trough passing overhead, showers and a few thunderstorms have been generated and moving across the region since late last evening (after a break yesterday). This is basically going to continue to be the story with waves of showers occurring – moving southwest to northeast across the region – this morning and midday. With the help of solar heating, one more round of showers and storms will be generated during the first half of the afternoon. The greatest threat for the heaviest rainfall with these will be in the vicinity of I-90 and southward, where torrential downpours can lead to flash flooding. The threat for severe thunderstorms is minimal as many of the parameters for that will be lacking, but keep in mind that any thunderstorm is capable of producing dangerous lightning, even if it is not frequent, and this threat should never be ignored, especially with so many outdoor plans for today. As we are dealing with that round of showers and storms, the upper trough axis will be just getting ready to exit the region from west to east, and the surface boundary will respond by starting to move eastward, ending the shower and storm threat from west to east during the second half of the afternoon. Any isolated showers and storms that may pop up behind this, further north, and west, will fade and dissipate by evening as the atmosphere becomes more stable. This sets the region up for much more favorable conditions for tonight’s fireworks displays. The only “issue” may be some areas of fog that form due to the lingering moisture near ground level. I don’t expect this to be extensive. Weak high pressure builds in for midweek with generally fair and warm to hot weather, still with fairly high humidity, for Wednesday and Thursday. Both days can feature slightly cooler sea breeze in coastal locations, and the pop up shower \/ t-storm threat is minimal, but I can’t rule it out 100%. Friday and Saturday, high pressure shifts slightly to the east and a more southerly air flow will be in place. This will continue the high humidity, but a southerly air flow tends to have more modified temperatures coming off the ocean water to the south, keeping significant heat from occurring. On these days, the South Coast would be “coolest” with a direct ocean wind. When we get to the end of the week – Friday and Saturday – we’ll be watching the approach of a frontal boundary from the west, but there are some indications that this boundary may not be close enough to trigger much of any shower and thunderstorm activity on Friday, and may do so only for western portions of the region Saturday. This part of the forecast is lower confidence and something to be monitored as the week goes on…<\/p>\n\n\n\n
TODAY (INDEPENDENCE DAY): Mostly cloudy with episodic showers and possible thunderstorms until mid afternoon, with heaviest rainfall potential along of and south of I-90 during the first 4 hours of the afternoon. Variably cloudy with any showers\/storms exiting to the east and any lingering isolated activity dissipating late afternoon \/ early evening. Highs 75-82. Dew point middle 60s to lower 70s. Wind variable, mostly E, up to 10 MPH.<\/p>\n\n\n\n
TONIGHT: Partly cloudy. Patchy ground fog. Lows 62-69. Dew point in 60+. Wind variable to NW up to 10 MPH.<\/p>\n\n\n\n
WEDNESDAY: Mostly sunny to partly cloudy. Slight chance of an isolated shower or thunderstorm. Highs 83-90. Dew point 60+. Wind variable up to 10 MPH with coastal sea breezes.<\/p>\n\n\n\n
WEDNESDAY NIGHT: Mostly clear. Patchy ground fog. Lows 63-70. Dew point 60+. Wind variable up to 10 MPH.<\/p>\n\n\n\n
THURSDAY: Mostly sunny to partly cloudy. Slight chance of an isolated shower or thunderstorm. Highs 83-90. Dew point 60+. Wind variable up to 10 MPH with coastal sea breezes.<\/p>\n\n\n\n
THURSDAY NIGHT: Mostly clear. Patchy ground fog. Lows 62-69. Dew point 60+ Wind SW up to 10 MPH.<\/p>\n\n\n\n
FRIDAY: Partly sunny. Slight chance of isolated showers\/thunderstorms in the afternoon. Highs 81-88. Dew point 65+. Wind S 5-15 MPH.<\/p>\n\n\n\n
FRIDAY NIGHT: Partly cloudy. Areas of fog. Lows 65-72. Dew point 65+. Wind S up to 10 MPH.<\/p>\n\n\n\n
SATURDAY: Partly sunny. Scattered showers and thunderstorms in the afternoon, favoring southwestern NH, central MA, and eastern CT. Highs 80-87. Dew point 65+. Wind S 5-15 MPH.<\/p>\n\n\n\n
DAYS 6-10 (JULY 9-13)<\/p>\n\n\n\n
Upper level low pressure and a frontal boundary in the vicinity will bring an unsettled pattern with opportunities for showers and thunderstorms. Temperatures near normal in general with no sustained major heat.<\/p>\n\n\n\n
DAYS 11-15 (JULY 14-18)<\/p>\n\n\n\n
Weak zonal flow pattern, still a tendency for a weak trough. A couple shower and thunderstorm chances and seasonable with no sustained heat.<\/p>\n","protected":false},"excerpt":{"rendered":"
DAYS 1-5 (JULY 4-8) Independence Day weather will not be independent of unsettled conditions. But there is good news too! A quasi-stationary trough bisects the WHW as it runs southwest to northeast across the region. There is air convergence along this trough line and with the additional help from an upper trough passing overhead, showers … Continue reading Tuesday July 4 2023 Forecast (8:27AM)<\/span>