Lexington, Massachusetts, USA
56.1°F
13.4°C
Cool
Mostly cloudy
Tonight: Lo 50 °F
Saturday: Hi 69 °F
Dew Point: 54.5°F
Humidity: 94%
Barometer:
mb
Rain Rate: 0.00 in/hr
Rain Today: 0.22 in
Rain Thursday: 0.01 in
Visibility: 10 miles
Wind:
Now: Calm
Avg: Calm
Gusts: 0 mph
Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Fri Jun 9, 2023 7:03pm EDT
Showers and scattered thunderstorms wind down this evening. Milder temperatures begin to return Saturday with the main threat for diurnally driven showers confined to eastern New England. A warming trend Sunday with a low risk for a few afternoon showers in the interior, then the weather pattern turns unsettled again for much of the upcoming week with the risk of showers each day. Temperatures will be seasonable for much of next week.
Chance Showers And T-Storms
Lo 50 °F
A chance of showers and thunderstorms before 4am, then patchy fog. Mostly cloudy, with a low around 50. Northeast wind around 3 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Scattered Showers And T-Storms
Hi 69 °F
Patchy fog before 9am, then scattered showers and thunderstorms between 11am and 5pm, then isolated showers and thunderstorms. Mostly cloudy, with a high near 69. North wind 2 to 6 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Isolated Showers And T-Storms then Patchy Fog
Lo 53 °F
Isolated showers and thunderstorms before 7pm, then patchy fog. Partly cloudy, with a low around 53. Southwest wind around 5 mph. Chance of precipitation is 20%.
Partly Sunny
Hi 80 °F
Partly sunny, with a high near 80. West wind 2 to 8 mph.
Mostly Cloudy then Slight Chance Rain Showers
Lo 60 °F
A slight chance of rain showers after 3am. Mostly cloudy, with a low around 60. South wind around 7 mph. Chance of precipitation is 20%.
Chance Rain Showers
Hi 77 °F
A chance of rain showers. Mostly cloudy, with a high near 77. South wind 6 to 15 mph. Chance of precipitation is 40%.
Showers And T-Storms
Lo 63 °F
Rain showers likely before 9pm, then showers and thunderstorms. Cloudy, with a low around 63. Southeast wind 10 to 14 mph. Chance of precipitation is 80%.
Showers And T-Storms Likely
Hi 75 °F
Rain showers likely before 11am, then showers and thunderstorms likely. Cloudy, with a high near 75. South wind around 12 mph. Chance of precipitation is 70%.
Chance Showers And T-Storms
Lo 58 °F
A chance of showers and thunderstorms. Mostly cloudy, with a low around 58. Southwest wind around 10 mph. Chance of precipitation is 50%.
Chance Rain Showers
Hi 74 °F
A chance of rain showers. Partly sunny, with a high near 74. Southwest wind 8 to 17 mph. Chance of precipitation is 40%.
Chance Rain Showers then Partly Cloudy
Lo 57 °F
A chance of rain showers before 8pm. Partly cloudy, with a low around 57. Southwest wind 10 to 16 mph. Chance of precipitation is 30%.
Chance Rain Showers
Hi 77 °F
A chance of rain showers after 9am. Mostly sunny, with a high near 77. West wind 10 to 14 mph. Chance of precipitation is 40%.
Chance Rain Showers
Lo 57 °F
A chance of rain showers. Partly cloudy, with a low around 57. West wind 7 to 12 mph. Chance of precipitation is 30%.
Chance Rain Showers
Hi 74 °F
A chance of rain showers. Mostly sunny, with a high near 74. Northwest wind 7 to 12 mph. Chance of precipitation is 30%.
Issued by:
National Weather Service Boston / Norton, MA
Updated Fri Jun 9, 2023 7:03pm EDT
000 FXUS61 KBOX 092300 AFDBOX Area Forecast Discussion National Weather Service Boston/Norton MA 700 PM EDT Fri Jun 9 2023 .SYNOPSIS... Showers and scattered thunderstorms wind down this evening. Milder temperatures begin to return Saturday with the main threat for diurnally driven showers confined to eastern New England. A warming trend Sunday with a low risk for a few afternoon showers in the interior, then the weather pattern turns unsettled again for much of the upcoming week with the risk of showers each day. Temperatures will be seasonable for much of next week. && .NEAR TERM /UNTIL 6 AM SATURDAY MORNING/... 7 PM update... Scattered showers and isolated t-storms continuing this evening, although activity has diminished somewhat. SBCAPES down to 250-500 J/kg, but cold pool aloft will help to sustain a few showers and possibly a t-storm for another few hours into the evening before winding down. Otherwise, generally dry weather prevails for the remainder of the night other than perhaps a brief spot shower. Low temps should bottom out mainly in the upper 40s to the lower 50s...but will need to watch for some patchy ground fog in the typically prone locations forming especially in areas that receive a modest amount of rain. && .SHORT TERM /6 AM SATURDAY MORNING THROUGH SATURDAY NIGHT/... Highlights... * Turning milder Saturday away from the coast with highs 70-75 * Scattered diurnally driven showers Sat and perhaps an isolated t-storm mainly confined to mainly the eastern half of MA/RI Details... Saturday... The upper trough axis will finally begin to shift east of the region on Saturday. This will allow milder mid level temps to spread eastward and also result in partial sunshine especially across parts of interior southern New England. Weak pressure gradient will promote sea breezes along much of the immediate coast...holding high temps in the 60s in those locales. However...the rest of the region should see some partial sunshine with highs recovering into the 70 to 75 degree range. In fact...the lower CT River Valley will likely see highs more in the middle 70s. The cold pool aloft will be shifting east as well. This will keep much of western MA/CT dry on Saturday except perhaps for a spot shower. However...steep mid level lapse rates will persist across the eastern half of the region especially over eastern MA. Therefore...we do expect scattered diurnally driven showers to develop across central/eastern MA & RI on Saturday. Areal coverage will not be as widespread as today...so some of these locations should stay dry. We might have enough marginal instability for an isolated t-storm or two across eastern New England...but that is about it and not expecting a repeat of today. Saturday night... Upper trough continues to move east and away from the region as a mid level ridge axis approaches. This will result in dry/tranquil weather Saturday night. Low temps will bottom out mainly in the upper 40s to the middle 50s. Light/Calm winds may promote patchy ground fog late in the typically prone locations...but not expecting anything widespread. && .LONG TERM /SUNDAY THROUGH FRIDAY/... Highlights... * Mainly dry and warmer Sunday. Low risk for afternoon shower interior * Unsettled weather pattern returns for much of next week with chance of showers each day. Seasonable temps Sunday... Weak ridging aloft develops across New Eng ahead of upper low dropping south into the Gt Lakes. This will bring partly to mostly sunny skies although some increase in clouds is expected during the afternoon. Marginal instability develops with a few hundred J/kg of CAPE which could lead to a shower in the interior in the afternoon, but given lack of forcing much of the region will be dry. It will be a warmer day as 850 mb temps rise to 12-13C. This will support highs in the upper 70s and lower 80s, but afternoon sea-breezes will keep coastal locations a bit cooler. Monday through Friday... Unsettled pattern returns as anomalous upper low across the Gt Lakes gradually moves east across New Eng through midweek before lifting out. But additional shortwave energy will be rotating southward from Canada with trough reloading late in the week. This will result in an extended period of unsettled weather with the risk of showers each day. The challenge will be the timing of wet weather. A period of widespread showers and a few t-storms is expected sometime Monday into Tuesday as anomalous PWAT plume advects northward ahead of frontal system approaching from the west. However, there is considerable uncertainty with the exact timing. GFS focuses the rain mostly on Monday then drying out Mon night/Tue while ECWMF brings the rain in Mon night into Tue. We leaned toward NBM PoPs which brings highest PoPs late Mon into early Tue. Some drying is expected behind this system Tue night, then additional shower activity and possible thunder Wed as upper low and cold pool moves into the region. Remains somewhat unsettled Thu/Fri as multiple shortwaves will be rotating through the mean trough, although a drier pattern with less coverage of showers and not a washout. Despite the unsettled pattern, temps should average near normal for much of the upcoming week, and possibly above normal for a few of the days as GEFS/EPS ensembles show high probs of 850T above 10C and low probs of max temps of 80+. Coolest day expected to be Wed as upper low/trough axis moves overhead. && .AVIATION /00Z SATURDAY THROUGH WEDNESDAY/... Forecaster Confidence Levels: Low - less than 30 percent. Medium - 30 to 60 percent. High - greater than 60 percent. 00z TAF Update... Tonight...Moderate Confidence. Scattered showers and isolated t-storms diminish this evening with the loss of daytime heating. Otherwise...VFR outside of localized patchy ground fog that may develop in some spots overnight. Remnant smoke from the Canadian Wildfires may continue to flirt with the Cape and Islands a times...resulting in perhaps some marginal MVFR vsbys. There also may be a period of low clouds/fog that develop near the coast after midnight but that remains uncertain. Light/Calm Wind. Saturday...High Confidence. Mainly VFR after any low clouds/fog patches burn off by mid-late morning. Brief localized lower conditions are also possible in the afternoon...mainly across eastern MA in scattered showers and perhaps an isolated t-storm or two. Light NW winds except for sea breezes developing along portions of the immediate coast. Saturday night...High Confidence. Mainly VFR outside any localized patchy ground fog that may develop in the typically prone locations toward daybreak. Light SW Winds KBOS Terminal...Moderate Confidence in TAF. A brief period of MVFR cigs possible until about 01Z, otherwise VFR through the period. KBDL Terminal...Moderate Confidence in TAF. a brief showers possible until 02z, otherwise VFR through the period. Outlook /Sunday through Wednesday/... Sunday: VFR. Sunday Night: VFR. Slight chance SHRA. Monday: Mainly VFR, with local MVFR possible. Breezy. Chance SHRA. Monday Night: Mainly MVFR, with areas IFR possible. Breezy. SHRA likely, isolated TSRA. Tuesday: Mainly MVFR, with local IFR possible. Breezy. Chance SHRA, isolated TSRA. Tuesday Night: VFR. Chance SHRA. Wednesday: Mainly VFR, with local MVFR possible. Breezy. Chance SHRA. && .MARINE... Forecaster Confidence Levels: Low - less than 30 percent. Medium - 30 to 60 percent. High - greater than 60 percent. Tonight through Saturday night...High Confidence. Weak pressure gradient will keep winds/seas below small craft advisory thresholds through Saturday night. Main concern is for a few nearshore thunderstorms early this evening...but the bulk of those storms will dissipate as they approach the waters. The only other issue will be some reduced vsbys mainly near and south of the Cape/Islands tonight from the remnant smoke from the Canadian Wildfires and perhaps some fog late. Outlook /Sunday through Wednesday/... Sunday: Winds less than 25 kt. Sunday Night: Winds less than 25 kt. Slight chance of rain showers. Monday: Winds less than 25 kt. Seas locally approaching 5 ft. Chance of rain showers. Monday Night: Winds less than 25 kt. Areas of seas approaching 5 ft. Rain showers likely, isolated thunderstorms. Tuesday: Winds less than 25 kt. Seas up to 5 ft. Chance of rain showers. Tuesday Night: Winds less than 25 kt. Areas of seas approaching 5 ft. Chance of rain showers. Wednesday: Winds less than 25 kt. Areas of seas approaching 5 ft. Slight chance of rain showers. && .BOX WATCHES/WARNINGS/ADVISORIES... CT...None. MA...Air Quality Alert until midnight EDT tonight for MAZ020>024. RI...None. MARINE...None. && $$ SYNOPSIS...KJC/Frank NEAR TERM...KJC/Frank SHORT TERM...Frank LONG TERM...KJC AVIATION...KJC/Frank MARINE...KJC/Frank
Radar images courtesy Weather Underground / Intellicast.
UV Index forecast high for today: 7 High
Current (Estimated): 0 None
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.
0.00 in
Rain Rate (/hr):
0.00 in
Rain Last 60 min:
0.22 in
Rain Today:
0.01 in
Thursday:
0.69 in
June:
21.96 in
2023
28.0 in
Season Snow:
1:50pm
67.5°F
High today:
5:45am
49.8°F
Low today:
4:31pm
64.9°F
High Thursday:
5:54am
52.0°F
Low Thursday:
5:45am
49.8°F
Low wind chill today:
1:47pm
58.1°F
High dew pt today:
11:54am
54.9°F
High dew pt Thursday:
2:25pm
12 mph
Wind gust today:
4:38pm
9 mph
Wind gust Thursday:
No alerts/warnings active for Southeast Middlesex County.
Alerts active nearby in: Barnstable, MA; Dukes, MA; Nantucket, MA; Southern Bristol, MA; Southern Plymouth, MA
First Light:
4:33am
Sunrise:
5:08am
Sunset:
8:21pm
Twilight ends:
8:55pm
Daylight length:
15 hours 13 minutes
Phase:
Waning Gibbous (60%)
Moon rise:
12:43am
Moon set:
11:03am