Point Forecast Updated Tue May 26, 2020 10:13pm EDT
Lo 62 °F
Partly cloudy, with a low around 62. Southwest wind around 1 mph.
Hi 89 °F
Sunny, with a high near 89. Southwest wind 1 to 12 mph, with gusts as high as 22 mph.
Partly Cloudy then Areas Of Fog
Lo 65 °F
Areas of fog after 4am. Partly cloudy, with a low around 65. Southwest wind 5 to 10 mph, with gusts as high as 23 mph.
Areas Of Fog then Mostly Cloudy
Hi 84 °F
Areas of fog before 7am. Mostly cloudy, with a high near 84. Southwest wind 5 to 8 mph.
Chance Rain Showers
Lo 67 °F
A chance of rain showers. Mostly cloudy, with a low around 67. Southwest wind around 8 mph. Chance of precipitation is 40%.
Chance Showers And T-Storms
Hi 83 °F
A chance of showers and thunderstorms. Partly sunny, with a high near 83. Southwest wind around 9 mph. Chance of precipitation is 40%.
Chance Showers And T-Storms
Lo 69 °F
A chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Southwest wind around 9 mph. Chance of precipitation is 50%.
Showers And T-Storms Likely
Hi 81 °F
Showers and thunderstorms likely. Mostly cloudy, with a high near 81. Southwest wind around 8 mph. Chance of precipitation is 60%.
Chance Rain Showers then Mostly Cloudy
Lo 57 °F
A chance of rain showers before midnight. Mostly cloudy, with a low around 57. West wind around 6 mph. Chance of precipitation is 30%.
Hi 70 °F
Mostly sunny, with a high near 70. Northwest wind around 7 mph.
Lo 48 °F
Mostly clear, with a low around 48. North wind around 6 mph.
Hi 67 °F
Sunny, with a high near 67. North wind around 6 mph.
Lo 48 °F
Partly cloudy, with a low around 48. Northwest wind around 3 mph.
Hi 69 °F
Sunny, with a high near 69. Northwest wind around 5 mph.
000 FXUS61 KBOX 270229 AFDBOX Area Forecast Discussion National Weather Service Boston/Norton MA 1029 PM EDT Tue May 26 2020 .SYNOPSIS... High pressure will move offshore tonight and will provide summerlike warmth and mugginess away from the coast for the rest of the work week. We end the week with showers and an isolated chance for a thunderstorm or two on Friday as a cold front crosses the region. High pressure will bring drier and cooler weather for the second half of the weekend into early next week. && .NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/... 1010 PM Update... * Expanded Dense Fog Advisory to include southern half of RI and southern Bristol county in MA. Previous forecast is largely on track. With a light southerly flow and a warm, moist air mass being advected over relatively cold ocean waters, the main concern tonight is how far north the fog bank is going to get. Based on the latest metar obs and nighttime microphysics satellite imagery, the fog bank is making its way up Narragansett Bay and is just south of Providence. So have decided to expand the Dense Fog Advisory to include Kent and Washington County in RI and the southern half of Bristol County in MA. May have to expand the Dense Fog Advisory further north but will monitor trends in the next few hours. Another area of interest is Eastern MA coast where the marine stratus is hugging or just off the coast. With a predominant southerly flow, it will be hard for the fog to get into Boston like last night but Cape Ann would be most likely to get into the action given its geography. The other main change was to bring the dew points up to match the current obs. PREVIOUS DISCUSSION... 7 PM Update: Forecast is on track. * Dense Fog Develops on Cape Cod and the Islands Tonight Satellite loop shows low clouds heading inland onto South Coast, Cape Cod, and Islands this evening. High-res guidance slowly advances this cloud deck inland tonight, mainly as far north as Hartford, Providence, and Plymouth though it could make it into Boston as well for a time. Webcams indicate fog is still lurking offshore south of the islands, but expect it to become more widespread near South Coast this evening due to low temp/dewpoint spreads and light S/SW winds. Cape Cod and Islands are typically favored for dense fog in this pattern so we are continuing the Dense Fog Advisory for tonight. It's possible dense fog also makes it onto south coastal RI and MA but still not confident enough to expand the advisory just yet. Lows in 50s and lower 60s look good. && .SHORT TERM /6 AM WEDNESDAY MORNING THROUGH WEDNESDAY NIGHT/... * Very Warm & A Bit Humid Away From The South Coast Wednesday Wednesday... The anomalous upper level ridge with height fields around 590 DM will remain in control of our weather. 850T are bit milder than today around +15C to +16C. This coupled with southwest flow should yield afternoon high temps in the upper 80s to near 90 away from cooling marine influence of the south coast. Unlike today, there will not be a sea breeze in Boston so they will get in on the summer- like warmth as well. It will be a bit muggy too with 60+ dewpoints, but southwest wind gusts of 20 to 25 mph during the afternoon which will help a bit. Dry weather will persist with the upper level ridge in control. Wednesday night... Model cross sections indicate low clouds developing from south to north Wednesday night. They will likely be more widespread, covering most if not all of the region by daybreak. We may even see some drizzle develop with some fog possible too especially near the south coast. Overnight lows will only drop into the lower to middle 60s in most locations with some 55 to 60 degree readings near the south coast. && .LONG TERM /THURSDAY THROUGH TUESDAY/... Thursday... Morning fog likely to start off across coastal Rhode Island through the south shore of Cape Cod. One of the biggest questions for Thursday will be the extent to the cloud over. Models show a decent swath of moisture between 925 and 850 mb... especially across western MA/CT. PWATS range between 1.5 and 2.0 inches across the Mid Atlantic and up into southern New York. With some weak forcing an isolated shower isn't out of the question. At 18z the 850mb temperatures climb to 14 degrees (C), indicating afternoon highs could reach the mid-80s. Those along the coast will have cooler afternoon highs in the upper 60s to low 70s. If clouds don't erode those temperatures will be difficult to produce, but, with a predominant southwesterly flow we should be capable of mixing them out. Friday... A cold front will spark scattered showers and possibly an isolated thunderstorm. PWATS range from 1.5 to 2.0 inches across the Mid Atlantic to Southern New England. Thunderstorms may develop NW of our area where better instability is present and could move into western Massachusetts during the mid-afternoon with locally heavy downpours. Saturday... Temperatures still remain rather warm on Saturday with 850 mb temperatures between 8 and 10 degrees Celsius. A few morning showers could linger depending on the speed the front moving offshore. The greatest chance of seeing a shower will be in eastern Massachusetts, the Cape, and Islands. Clouds clear from west to east late in the day as drier and cooler air moves in from Quebec. Sunday/Monday... An area of high pressure moves out of from the Great Lakes Region Sunday into Monday with an upper-level through moves across New England and eastern Quebec. The 500 mb temperatures above Southern New England are -12 degrees Celsius! That will result in cooler than normal temperatures in the middle and upper 60s. && .AVIATION /02Z WEDNESDAY THROUGH SUNDAY/... Forecaster Confidence Levels... Low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent. 00z TAF Update...Moderate confidence. CIGS steadily lower to IFR across much of CT, RI, and SE MA tonight as well as near Berkshires, but conditions remain VFR elsewhere. S/SW winds prevail as sea breezes subside. IFR CIGS improve to VFR Wed morning as low clouds retreat offshore, with process being the slowest across the Cape and Islands. Otherwise, VFR conditions expected with SW wind gusts into the lower 20 knots during the afternoon across the southeast New England coast. Low clouds return Wed night from south to north. Appears this time the lower clouds will overspread most if not all of the region. So expect mainly lower end MVFR to IFR conditions. LIFR conditions with fog may impact the south coast, Cape, and Islands. KBOS Terminal...High confidence in TAF. KBDL Terminal...High confidence in TAF. Outlook /Thursday through Sunday/... Thursday: Mainly VFR, with local IFR possible. Slight chance SHRA. Thursday Night: Mainly VFR, with areas IFR possible. Breezy. Chance SHRA, chance TSRA. Friday through Friday Night: Mainly VFR, with local IFR possible. Breezy. Chance SHRA, chance TSRA. Saturday: Mainly VFR, with local MVFR possible. Breezy. Chance SHRA, chance TSRA. Saturday Night: Mainly VFR, with local MVFR possible. Slight chance SHRA. Sunday: VFR. Breezy. && .MARINE... Tonight through Wednesday night...High confidence. S to SW winds will continue through Wed night, but winds/seas should generally remain below SCA thresholds. Some choppy seas may develop Wednesday afternoon though with some lower 20 knot wind gusts near shore. The main issue will be for areas of fog that will be dense especially during the overnight to mid morning hours. Outlook /Thursday through Sunday/... Thursday: Winds less than 25 kt. Slight chance of rain showers. Thursday Night: Winds less than 25 kt. Areas of seas approaching 5 ft. Chance of rain showers. Friday: Winds less than 25 kt. Seas up to 5 ft. Chance of rain showers, chance of thunderstorms. Friday Night: Winds less than 25 kt. Areas of rough seas. Thunderstorms likely, chance of rain showers. Saturday: Winds less than 25 kt. Local rough seas. Chance of rain showers, chance of thunderstorms. Saturday Night: Winds less than 25 kt. Local rough seas. Slight chance of rain showers. Sunday: Winds less than 25 kt. Areas of seas approaching 5 ft. Slight chance of rain showers. && .BOX WATCHES/WARNINGS/ADVISORIES... CT...None. MA...Dense Fog Advisory until 8 AM EDT Wednesday for MAZ020>024. RI...Dense Fog Advisory until 8 AM EDT Wednesday for RIZ003>008. MARINE...None. && $$ SYNOPSIS...Frank/Gaucher NEAR TERM...Chai/JWD SHORT TERM...Frank LONG TERM...Gaucher AVIATION...Frank/Gaucher/JWD MARINE...Frank/Gaucher
Zone forecast: https://api.weather.gov/zones/forecast/MAZ014/forecast
Hourly forecast: https://api.weather.gov/gridpoints/BOX/64,79/forecast/hourly
Hourly detail: https://api.weather.gov/gridpoints/BOX/64,79
Point detail: https://api.weather.gov/points/42.4399,-71.2405