Point Forecast Updated Sun Dec 8, 2019 3:20pm EST
Hi 33 °F
Partly sunny, with a high near 33. South wind around 7 mph.
Mostly Cloudy then Slight Chance Rain Showers
Lo 31 °F ↑
A slight chance of rain showers after 5am. Mostly cloudy. Low around 31, with temperatures rising to around 39 overnight. South wind 7 to 10 mph. Chance of precipitation is 20%.
Rain Showers Likely
Hi 55 °F
A chance of rain showers before 8am, then rain showers likely and patchy fog. Cloudy, with a high near 55. South wind 5 to 14 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Lo 52 °F
Rain showers and patchy fog. Cloudy, with a low around 52. South wind 10 to 15 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Chance Rain Showers
Hi 59 °F
A chance of rain showers and patchy fog. Cloudy, with a high near 59. Southwest wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.
Sleet Likely then Snow Showers Likely
Lo 29 °F
Rain showers likely before 11pm, then sleet likely and rain showers likely between 11pm and midnight, then rain and snow showers likely between midnight and 2am, then snow showers likely and sleet likely. Cloudy, with a low around 29. West wind 5 to 8 mph. Chance of precipitation is 70%. New snow accumulation of around one inch possible.
Snow Showers Likely
Hi 34 °F
Snow showers likely before 4pm. Mostly cloudy, with a high near 34. West wind around 6 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 3 inches possible.
Lo 21 °F
Partly cloudy, with a low around 21. West wind around 7 mph.
Hi 29 °F
Sunny, with a high near 29. Northwest wind around 7 mph.
Lo 17 °F
Mostly clear, with a low around 17. North wind around 5 mph.
Hi 34 °F
Mostly sunny, with a high near 34. East wind around 5 mph.
Chance Snow Showers
Lo 29 °F
A chance of snow showers between 7pm and 2am, then a chance of rain and snow showers. Mostly cloudy, with a low around 29. Southeast wind around 5 mph. Chance of precipitation is 30%.
Chance Rain Showers
Hi 47 °F
A chance of rain showers. Mostly cloudy, with a high near 47. East wind around 5 mph. Chance of precipitation is 50%.
Chance Rain Showers
Lo 39 °F
A chance of rain showers. Cloudy, with a low around 39. North wind around 5 mph. Chance of precipitation is 50%.
000 FXUS61 KBOX 082054 AFDBOX Area Forecast Discussion National Weather Service Boston/Norton MA 354 PM EST Sun Dec 8 2019 .SYNOPSIS... Strong high pressure centered over Georges Bank this evening shifts farther offshore tonight, which will start a return flow of increasingly milder and more moist air. Scattered showers late tonight will turn into a soaking rain Monday into Tuesday. Strong southwest winds are expected in southeast Massachusetts and all coastal waters late Monday afternoon and Monday night. A cold front moves through Tuesday night, ushering in much colder air that will likely change rain to snow and linger into Wednesday with accumulations possible. Cold and dry into Friday before temperatures begin to moderate Friday night. Next system brings a period of rains by the weekend, with temperatures trending above normal. && .NEAR TERM /UNTIL 6 AM MONDAY MORNING/... 345 PM update ... Tonight ... With ridge axis now offshore WAA pattern underway with positive thermal advection at 850 mb and 925 mb. Surface temps will fall with sunset given light winds, dry airmass and just high clouds across the region. However as WAA strengthens and clouds increase by late evening and especially after midnight temperatures will rise thru the 30s and into the 40s along the coast. Big difference from the past two nights. Eventually column saturates in the WAA pattern with risk of scattered showers 09z-12z. SSW winds gradually increase overnight as low level jet increases to 35-45 kt at 925 mb. && .SHORT TERM /6 AM MONDAY MORNING THROUGH MONDAY NIGHT/... *** Periods of moderate to heavy rain *** 345 PM update... Monday ... Strong thermal and moisture advection ahead of approaching short wave with 925 mb winds increasing to 60-70 kt. This results in PWATs surging to about 1.25 inches by end of the day. This synoptic scale lift combined with anomalous moisture advection will yield periods of moderate to heavy rain. This strong low level WAA results in surface dew pts rising into the low 50s across eastern CT/RI and eastern MA. These high dew pts combined with plenty of SSW wind should yield appreciable snow melt and combined with moderate to heavy rain at times, expecting lots of standing water for the late day/evening commute. Thus hydroplaning could become a concern. These increasing dew pts streaming over the snowpack will also increase the probability of patchy dense fog. Strongest wind gusts up to 30 mph will be over southeast MA where dew pts climb into the low 50s and easy low level inversion. Inland with dew pts only the 40s should be enough of an inversion to keep winds 20 mph or less. As for thunder, not expecting much if any given lack of elevated instability/poor mid level lapse rates. Monday night ... *** Periods of Moderate to Heavy Rain Likely *** Periods of moderate to heavy rain continue thru the evening as robust mid level short wave moves across the area and accompanied by 60-70 kts of SSW flow at 925 mb and advects PWATs up to 1.4 inches across RI and eastern MA. This strong low level WAA results in surface dew pts continuing to surge into the low and mid 50s. Thus more snowmelt combined with periods of moderate to heavy rain during the event will continue to yields lots of standing water on area roadways. SW winds could gusts up to 40 mph over southeast MA including Cape Cod and the Islands. This strong low level WAA pattern will result in temps remaining in the 50s overnight! These increasing dew pts streaming over the snowpack will also keep the risk of patchy dense fog. Short wave moves east of the region second half of the night with weak short ridging building across the area. Thus a downward trend in precip is likely after midnight. && .LONG TERM /TUESDAY THROUGH SUNDAY/... 345 PM update ... Highlights... * Cloudy but mild Tues with another round of showers mainly late day * Rain early Tues nite changes to a period of accumulating snow (potentially plowable in interior and urban corridor) overnight into Wed. Increasing confidence for adverse impact to Wed AM commute. * Cold and dry Wed nite through Fri. Moderating temperature and moisture levels Friday night. * Next system for the weekend, with rainy conditions and above- normal temps. Details... Tuesday: In the wake of expected rains Monday night, weather pattern remains unsettled for Southern New England. Most of the region will be the warm sector and a cloudy one at that. Will keep chances for showers going through the first part of the day, but tried to focus highest PoPs into the Likely range more tied with the cold front, which approaches our western counties late Tuesday. Cold frontal precip should prove much less than the rains for Monday/Monday night, with additional QPF of a quarter inch or less. Highs mid/upper 50s to near 60. Tuesday night into Wednesday: Colder air rushes southeastward Tuesday night, and as at least sheared-out mid-level vort max ripples northeastward from the central Appalachians, will be looking at rain changing to wet snow on the cold side of the cold front. Did note more ECMWF Ensemble members indicating snow for Tuesday night into Wednesday than 24 hours ago, with ensemble probabilities for 3" or more of snow in the 24-hour period 18z Tue - 18z Wed now up to 50% across western MA/western Hartford County, the hills in central MA and Tolland County eastward into the northern Providence suburbs. Recent trends in the GFS have also trended snowier in this period. Global models show anomalously strong mid and upper level jets (~ 100 kts at 500 mb, 150 kts at 250 mb, with Southern New England positioned in the favorable equatorward entrance region of each jet), and there are hints in the guidance at some bands (axis of 850 mb -EPV, some though unfocused FGen @ 850) during the overnight hrs. What remains uncertain is the timing of the changeover, forecast liquid-equivalent precip and the northwestern extent of accumulating snows. Each of the above factors renders confidence in snow accumulations at low to moderate levels. Did note that most models have again increased QPF in this period, though there may be a sharp cutoff in precip N/W of the Mass Pike and especially north of northern MA/Route 2 corridor. WPC's Day-3 accumulation seems fairly reasonable as far as a first-cut at accumulations goes. In spite of stated uncertainties, do think confidence is increasing in potential for an adversely impacted Wednesday morning commute for at least a part of the region, especially across the central part of the interior (Hartford/Springfield, Worcester/Providence into the I- 95 corridor). This is roughly where axis of greatest liquid- equivalent QPF seems to lie, though some variability in models exists to be re-evaluated with forthcoming guidance. Pavement's also apt to be wet at onset and sharply colder temperatures filtering that could freeze this before or during the period of accumulating snow, the potential for slippery travel into the AM commute remains a possibility. Wednesday Night through Friday Night: 1040+ mb high becomes anchored across much of New England. Quite chilly and dry through Thursday night with 850 mb temps in the -10 to -15C range. Will show highs in the 20s to near freezing, with lows in the teens. A few single digit lows are possible across northern MA. Southerly warm advection pattern commences Friday into Friday night as high pressure shifts into the Canadian Maritimes. Temperatures and moisture levels should begin to recover. Will see increased clouds into the nighttime hrs Friday night, and while the GFS brings in warm frontal precip late, likely too dry to support PoPs higher than low Chance. Saturday into Sunday: Weekend remains unsettled with the next chance of significant precip by the weekend, though models continue to deviate on timing. As mentioned, the GFS brings rain in as soon as Friday night, while the ECMWF is more into late Saturday into Saturday night, and the Canadian GEM is still slower than the ECMWF. Could be a decent rain maker for most of southern New England, with another round of gusty southerly winds across the waters. A return to above-normal temps looks likely for the weekend with 850 mb temps rising into the mid/upper single digits Celsius. Will show highs in the upper 40s to mid 50s with clouds and rain likely accompanying the warmest temps, though potential for even warmer with cloud breaks. && .AVIATION /21Z SUNDAY THROUGH FRIDAY/... Forecaster Confidence Levels... Low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent. Short Term /through Monday Night/...High confidence. 1815z ... Thru Midnight ... VFR, dry weather and increasing SSW winds. After midnight ... VFR lowering to MVFR in scattered showers toward morning. Monday ... MVFR with embedded IFR especially inland. Periods of rain, moderate to heavy at times. LLWS 020/19045kt. Surface south at 20-25 kt, lighter winds elsewhere. Areas of fog will restrict vsbys in the MVFR/IFR category. Monday night ... A mix of MVFR/IFR in periods of rain, moderate to heavy at times. Areas of fog too. Rain possibly tapering off after 06z. LLWS 020/19050kt KBOS Terminal...High confidence in TAF trends, lower confidence on exact timing details. KBDL Terminal...High confidence in TAF trends, lower confidence on exact timing details. Outlook /Tuesday through Friday/... Tuesday: Mainly MVFR, with local VFR possible. Windy with local gusts up to 30 kt. SHRA likely. Tuesday Night: MVFR/IFR conditions possible. Breezy. SHRA likely, SHSN likely, PL likely, FZRA likely. Wednesday: Mainly VFR, with areas IFR possible. Breezy. Chance SHSN. Wednesday Night through Thursday: VFR. Windy with local gusts up to 30 kt. Thursday Night through Friday: VFR. Breezy. && .MARINE... Short Term /through Monday Night/...High confidence. 345 AM update: ** Gale Warning Continues late Monday/Monday Night ** Tonight ... 1030+ mb high pressure over Georges Bank continues moving seaward overnight. Gradual increase in SSW winds. Dry weather and good vsby thru midnight but then risk of showers toward daybreak. Monday ... SSW winds increase to gale force late in the day along with building seas. Areas of dense fog develop possible in the afternoon along with milder conditions. Periods of moderate to heavy rain limit vsby. Monday night ... SSW gales continue with periods of moderate to heavy rain during the evening along with areas of dense fog possible. Vsby may improve after midnight as rain moves offshore and SSW winds become more SW. Outlook /Tuesday through Friday/... Tuesday: Moderate risk for Small Craft Advisory winds with gusts up to 30 kt. Rough seas up to 14 ft. Chance of rain showers. Tuesday Night: Low risk for Small Craft Advisory winds with gusts up to 25 kt. Rough seas up to 10 ft. Rain showers likely. Wednesday: Winds less than 25 kt. Local rough seas. Rain showers likely, snow showers likely. Local visibility 1 to 3 nm. Wednesday Night: Moderate risk for Small Craft Advisory winds with local gusts up to 30 kt. Areas of rough seas. Thursday: Moderate risk for Small Craft Advisory winds with local gusts up to 30 kt. Local rough seas. 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...Gale Warning from 6 PM Monday to 6 AM EST Tuesday for ANZ231>235-237-250-251-254>256. Small Craft Advisory from 4 PM Monday to 6 AM EST Tuesday for ANZ230-236. && $$ SYNOPSIS...Nocera/Loconto NEAR TERM...Nocera SHORT TERM...Nocera LONG TERM...Loconto AVIATION...Nocera/Loconto MARINE...Nocera/Loconto
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