National Weather Service Boston / Norton, MA
Point Forecast Updated Mon Sep 16, 2019 4:02am EDT
Hi 72 °F
Mostly sunny, with a high near 72. Northwest wind 3 to 7 mph.
Lo 50 °F
Mostly clear, with a low around 50. Northwest wind around 7 mph.
Hi 70 °F
Sunny, with a high near 70. Northeast wind 5 to 8 mph.
Lo 46 °F
Partly cloudy, with a low around 46. Northeast wind around 5 mph.
Hi 65 °F
Mostly sunny, with a high near 65. Northeast wind 5 to 9 mph.
Lo 43 °F
Mostly clear, with a low around 43. Northeast wind 2 to 8 mph.
Hi 70 °F
Sunny, with a high near 70. East wind 2 to 6 mph.
Lo 46 °F
Mostly clear, with a low around 46. Southwest wind around 5 mph.
Hi 76 °F
Sunny, with a high near 76. Northeast wind around 3 mph.
Lo 53 °F
Mostly clear, with a low around 53. Southwest wind around 5 mph.
Hi 79 °F
Sunny, with a high near 79. North wind around 6 mph.
Lo 59 °F
Mostly clear, with a low around 59. South wind around 5 mph.
Hi 84 °F
Sunny, with a high near 84. Southwest wind 3 to 7 mph.
Slight Chance Rain Showers
Lo 62 °F
A slight chance of rain showers after 11pm. Partly cloudy, with a low around 62. Southwest wind around 7 mph.
000 FXUS61 KBOX 160846 AFDBOX Area Forecast Discussion National Weather Service Boston/Norton MA 446 AM EDT Mon Sep 16 2019 .SYNOPSIS... High pressure will bring an extended period of dry weather into next weekend. The high will initially be accompanied by unseasonably cool weather Tuesday into Thursday morning. A gradual warmup is expected, as temperatures possibly rebound into the 80s this weekend. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... Veil of high thin clouds is pushing across the region early this morning. A band of lower clouds extends from NY and PA across the Berkshires into central and southern areas as seen on latest GOES-East satellite imagery and observations, with cloud heights between 4Kft and 6Kft. This band is near or just S of the approaching cold front, which will clear the S coast by 12Z or so. Light/variable or calm winds through the pre dawn hours, along with low T/Td spreads, may produce some patchy fog, especially across portions of the CT valley as well as portions of interior SE Mass. Expect low temps to be in the mid 50s to near 60 across most areas, up to the lower-mid 60s along the S coast, Cape Cod and the islands. For today, a weak low pres wave will slide along the front, which may bring a few spotty showers to portions of N central/NE CT. Those showers should quickly shift S by around midday or early this afternoon. Expect the front to quickly shift S as the southern periphery of large high pres builds slowly out of eastern Canada. The band of clouds will also push S during the morning, with increasing sunshine during the afternoon as winds shift to N. Expect seasonable temps as readings reach the upper 60s to lower 70s. && .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM TUESDAY/... Tonight and Tuesday... The large high will dominate through this timeframe, with dry conditions in place. N winds will continue tonight into Tuesday morning, then shift to NE by midday or early afternoon. Will see wind gusts up to around 20 kt along the coast late tonight and Tuesday. With lighter winds inland tonight, temps will drop with the mainly clear skies in place. Temps will bottom out in the 40s, lowest in the normally colder valley locations, ranging to the mid-upper 50s along the immediate E coast. Readings will tend to rebound, but will remain cooler along the coast with highs only in the mid to upper 60s and the higher inland terrain, ranging to around 70 across the coastal plain and the CT valley. && .LONG TERM /TUESDAY NIGHT THROUGH SUNDAY/... Updated 330 AM ... Highlights... * Very pleasant dry stretch of weather this period * Fall-like temps mid week then summer warmth for the weekend Precipitation... Amplifying upper air pattern this period marked by an anomalous northwest Atlantic trough and building MS Valley/Great Lakes ridge. This places New England in dry anticyclonic/NW mid level flow. Thus not expecting any precipitation during this period (Tue night thru Sunday) Temperatures... Given the high amplitude upper air pattern large temperature fluctuations expected this period. Keep in mind normal temps this time of year are are highs 70-75 and average lows 53-58. Anomalous northwest Atlantic trough delivers subzero 850 mb temps across the Maritimes Tue night with 850 temps down to +3C over eastern MA Wed morning! Thus cooler than normal temps here with lows in the 40s (30s & frost possible!)and highs only in the 60s mid week despite plenty of sunshine. Given the dry airmass, light winds and mainly clear skies derived min temps from the colder MOS guidance. After another chilly start Thu morning airmass slowly begins to modify with height rises in response to mid level ridge building into New England from the OH Valley. Highs will rebound into the low 70s Thu, near 80 Friday, low 80s Saturday and possibly mid 80s Sunday. Given Euro ensembles have +17C air at 850 mb streaming across southern New England Sunday, leaned toward the warmest guidance (WPC) here. Hurricane Humberto... No senSible weather impacts for southern New England as Humberto tracks out to sea passing very close to Bermuda Thursday morning. By Fri anomalous northwest Atlantic trough is expected to capture Humberto and shift its track northward, still passing well east of New England. However this northward trajectory will likely bring large swells into the New England waters. So a concern this weekend is as temperatures warm into the 80s especially Sunday, beachgoers may have to contend with large/rough surf and strong rip currents at ocean exposed beaches of RI/MA. Unfortunately now that it's mid to late Sep most if not all beaches no longer have lifeguards on duty. && .AVIATION /08Z MONDAY THROUGH FRIDAY/... Forecaster Confidence Levels... Low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent. Short Term /through Tuesday/...High confidence. Through Today...VFR conditions. Expect mid and high clouds, though may be a bit lower across western Mass into N central/NE CT through 12Z or so. Low chance for showers across N central/NE CT through mid to late morning. May see spotty MVFR CIGS. Light/variable winds early becoming N-NW at 5-10 kt. Tonight and Tuesday...VFR. Light N-NW winds early tonight shifts to N 5 to 10 knots. Gusts up to 20 kt possible along E coastal areas late tonight through around midday Tuesday. KBOS Terminal...High confidence in TAF. KBDL Terminal...High confidence in TAF. Outlook /Tuesday Night through Friday/...High confidence. Tuesday Night: VFR. Wednesday through Wednesday Night: VFR. Breezy. Thursday through Friday: VFR. && .MARINE... Forecaster Confidence Levels... Low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent. Short Term /through Tuesday/...High confidence. Overnight and Monday...Weak pressure gradient will allow winds and seas to remain well below small craft advisory thresholds. Monday night...A cold front will cross the waters Monday evening. Decent mixing in the cool air advection pattern should yield a period of northerly lower 20 knot wind gusts and 2 to 4 foot seas. We can not rule out brief SCA conditions, but threat is too marginal to hoist any headlines at this point. Outlook /Tuesday Night through Friday/...Moderate confidence. Tuesday Night through Wednesday: Winds less than 25 kt. Areas of seas approaching 5 ft. Wednesday Night: Winds less than 25 kt. Local rough seas. Thursday through Thursday Night: Winds less than 25 kt. Areas of seas approaching 5 ft. Friday: Winds less than 25 kt. Local rough seas. && .BOX WATCHES/WARNINGS/ADVISORIES... CT...None. MA...None. RI...None. MARINE...None. && $$ SYNOPSIS...Nocera/EVT NEAR TERM...EVT SHORT TERM...EVT LONG TERM...Nocera AVIATION...Nocera/EVT MARINE...Nocera/EVT
Note: Rain measured automatically by weather station. Rain totals do not necessarily include melted frozen precipitation.
For more accurate, manually measured rain data, see the Local Precip Data page.
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12 hours 28 minutes
Waning Gibbous (96%)