Lexington Weather
Lexington, Massachusetts, USA
- Mostly cloudy
-
67.5°F / 19.7°C
-
66.6°F
-
97%
-
SW Calm, 10-min avg: 1 mph, gust: 5 mph
- 10 miles
- 0.00 in
National Weather Service Forecast for:
Lexington, MA
Issued by:
National Weather Service Boston / Norton, MA
Tonight through Wednesday
Point Forecast Updated Wed Sep 22, 2021 9:28pm EDT
Overview:
Our area remains in between high pressure to our east, and a slow-moving cold front to our west. For southern New England, this will result in considerable cloudiness and scattered showers. This slow-moving front will bring showers and thunderstorms into western sections late Thursday night, moving eastward across the region during Friday. Showers and thunderstorms then linger over eastern Massachusetts Saturday, otherwise improving weather. More showers possible Sunday and Tuesday. No big warm ups or cool downs are expected.
Tonight:
Areas Of Fog
Lo 66 °F
Areas of fog after 11pm. Mostly cloudy, with a low around 66. Southeast wind around 6 mph.
Thursday:
Slight Chance Rain Showers
Hi 78 °F
Areas of fog before 8am, then a slight chance of rain showers. Mostly cloudy, with a high near 78. Southeast wind 6 to 12 mph. Chance of precipitation is 20%.
Thursday Night:
Chance Rain Showers
Lo 67 °F
A chance of rain showers before 4am, then areas of fog and a chance of rain showers. Mostly cloudy, with a low around 67. Southeast wind around 10 mph. Chance of precipitation is 30%.
Friday:
Rain Showers Likely
Hi 76 °F
Rain showers likely and areas of fog before 2pm, then showers and thunderstorms likely. Cloudy, with a high near 76. Southeast wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night:
Showers And T-Storms Likely
Lo 62 °F
Showers and thunderstorms likely before 10pm, then patchy fog and a chance of showers and thunderstorms between 10pm and 3am, then patchy fog and a slight chance of rain showers. Mostly cloudy, with a low around 62. Southwest wind 3 to 9 mph. Chance of precipitation is 70%.
Saturday:
Patchy Fog then Mostly Sunny
Hi 74 °F
Patchy fog and a slight chance of rain showers before 10am. Mostly sunny, with a high near 74. Southwest wind around 5 mph. Chance of precipitation is 20%.
Saturday Night:
Patchy Fog
Lo 58 °F
Patchy fog after 9pm. Partly cloudy, with a low around 58. Southwest wind around 5 mph.
Sunday:
Slight Chance Rain Showers
Hi 73 °F
Patchy fog before 8am, then a slight chance of rain showers. Mostly sunny, with a high near 73. West wind 5 to 8 mph.
Sunday Night:
Mostly Clear
Lo 56 °F
Mostly clear, with a low around 56. West wind around 7 mph.
Monday:
Sunny
Hi 72 °F
Sunny, with a high near 72. West wind 6 to 9 mph.
Monday Night:
Partly Cloudy
Lo 55 °F
Partly cloudy, with a low around 55. Southwest wind around 7 mph.
Tuesday:
Chance Rain Showers
Hi 73 °F
A chance of rain showers after 10am. Partly sunny, with a high near 73. West wind around 7 mph. Chance of precipitation is 30%.
Tuesday Night:
Chance Rain Showers
Lo 55 °F
A chance of rain showers. Mostly cloudy, with a low around 55. West wind around 6 mph. Chance of precipitation is 30%.
Wednesday:
Mostly Sunny
Hi 69 °F
Mostly sunny, with a high near 69. Northwest wind around 8 mph.
Today 5am through 8pm EDT
Updated Thu Sep 23, 2021 4:39am EDT
Dew Pt 66°F
SE 7 mphPrecip: 7%
Dew Pt 66°F
SE 7 mphPrecip: 9%
Dew Pt 66°F
SE 7 mphPrecip: 10%
Dew Pt 67°F
SE 7 mphPrecip: 21%
Dew Pt 67°F
SE 8 mphPrecip: 13%
Dew Pt 67°F
SE 10 mphPrecip: 21%
Dew Pt 68°F
SE 10 mphPrecip: 32%
Dew Pt 67°F
SE 10 mphPrecip: 13%
Dew Pt 67°F
SE 10 mphPrecip: 13%
Dew Pt 66°F
SE 12 mphPrecip: 13%
Dew Pt 66°F
SE 10 mphPrecip: 13%
Dew Pt 66°F
SE 10 mphPrecip: 12%
Dew Pt 67°F
SE 10 mphPrecip: 12%
Dew Pt 67°F
SE 9 mphPrecip: 42%
Dew Pt 67°F
SE 9 mphPrecip: 44%
Dew Pt 67°F
SE 9 mphPrecip: 23%
FORECAST DISCUSSION
Area Forecast Discussion
for Boston / Norton, MA
000
FXUS61 KBOX 230818
AFDBOX
Area Forecast Discussion
National Weather Service Boston/Norton MA
418 AM EDT Thu Sep 23 2021
.SYNOPSIS...
Our area remains in between high pressure to our east, and a
slow-moving cold front to our west. For southern New England,
this will result in considerable cloudiness and scattered
showers. This slow-moving front will bring showers and
thunderstorms into western sections late Thursday night, moving
eastward across the region during Friday. Showers and
thunderstorms then linger over eastern Massachusetts Saturday,
otherwise improving weather. More showers possible Sunday and
Tuesday. No big warm ups or cool downs are expected.
&&
.NEAR TERM /UNTIL 6 PM THIS EVENING/...
Not much change to the overall synoptic pattern today. High
pressure over the North Atlantic, and a low pressure over the
Great Lakes. As a result, not expecting much change in the
forecast outcome. Still looking at a bunch of clouds and
scattered showers at times. Light rainfall amounts. Another day
of above normal temperatures.
&&
.SHORT TERM /6 PM THIS EVENING THROUGH 6 PM FRIDAY/...
A cold front to our west will continue to approach our region
tonight into Friday. This front will take quite some time to
make its way through southern New England. Thinking this front
will still be somewhere over eastern MA and RI late Friday. The
main impact will be to provide a focus for stronger showers.
Instability is modest, but sufficient to support a few
thunderstorms. There is a chance for some stronger than garden-
variety thunderstorms, provided there is sufficient shear to
maximize the instability present. Still quite a few moving
parts, so not yet ready to etch this in stone.
Will also need to monitor rainfall amounts. At this time,
thinking we have had sufficiently light rainfall the past few
days we could handle a couple of additional inches, as long as
it did not fall all at once.
Generally above normal temperatures continue.
&&
.LONG TERM /FRIDAY NIGHT THROUGH WEDNESDAY/...
Highlights...
* Drier, less humid air moves in over the weekend into early
next week
* Mostly dry on Saturday but a series of disturbances brings
periods of unsettled weather through the weekend and into
next week
Details...
Friday night and Saturday...
As the parent low lifts into the Hudson Bay its cold front is
slow to traverse southern New England, likely only as far east
as central MA by Friday evening. It will make its way through by
Saturday morning keeping rain in the forecast for eastern MA/RI
through at least sunrise Saturday. While instability wanes
after sunset enough lingers to support some scattered
thunderstorms during the overnight hours.
Saturday much drier and less humid air arrives for much of the
region, especially western/central parts of southern New
England. However, there is some question as to weather the front
stalls around eastern MA which would keep the higher dewpoints
and scattered showers around during the day on Saturday. For now
keeping a slight chance to a chance of showers in the forecast
for eastern MA into Rhode Island with dry weather elsewhere.
While the ECMWF continues to be more bullish/wet for Saturday,
both the EPS and GEFS ensemble guidance is showing a >50 percent
chance of some rain through the day on Saturday. Otherwise
expect a good deal of sun in western/Central MA and CT where the
column is quite dry save for some moisture at 850 mb allowing
for some diurnal clouds.
Sunday...
The latter half of the weekend we'll see another shortwave dip
down over New England with a -20C cold pool at 500 mb. This will
allow for more clouds and some instability driven showers. 850
mb temps cool a bit from Saturday meaning highs a bit cooler, in
the low to mid 70s.
Monday through Wednesday...
For the first half of the week, broad troughing remains over
the eastern U.S. with periodic shortwaves rotating through the
flow and bringing bouts of rain to the region. While it is
difficult to time out the individual shortwaves at this time
another period of showers appears likely Tuesday-Wednesday.
Temperatures will trend cooler, with highs in the upper 60s and
low 70s.
&&
.AVIATION /08Z THURSDAY THROUGH MONDAY/...
Forecaster Confidence Levels.
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Today...IFR/MVFR to start the day in low clouds and areas of
fog. then improving to mainly MVFR. Areas VFR eastern MA.
Scattered SHRA.
Tonight...CIGs/VSBYs lower to MVFR/IFR in low clouds and areas
of fog. SCT SHRA to start, becoming more numerous overnight with
TSRA possible after 10Z BDL-BAF corridor.
Friday...Mix of MVFR/VFR as a cold front crosses the region.
Widespread showers and isolated thunderstorms.
KBOS Terminal...High confidence in trends. Moderate confidence
in timing.
KBDL Terminal...High confidence in trends. Moderate confidence
in timing.
Outlook /Friday Night through Monday/...
Friday Night: VFR. Chance SHRA, slight chance TSRA.
Saturday: VFR. Slight chance SHRA, slight chance TSRA.
Saturday Night: VFR. Slight chance SHRA.
Sunday through Monday: VFR. Breezy.
&&
.MARINE...
Forecaster Confidence Levels.
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Southeast winds continue across the waters. Seas continue to
build across the southern coastal waters. Small Craft Advisories
continue. May need to look at expanding advisories to more
nearshore waters. Just not confident in seeing wind gusts up to
25 kt long enough across those waters.
Patchy showers/drizzle and fog possible across the waters during
this period. Reduced visibility possible in the fog, but not
quite as much within precipitation. Thunderstorms more possible
across the coastal waters late tonight into Friday.
Outlook /Friday Night through Monday/...
Friday Night through Saturday Night: Winds less than 25 kt.
Seas up to 5 ft. Chance of rain showers, slight chance of
thunderstorms.
Sunday: Winds less than 25 kt. Seas up to 5 ft.
Sunday Night: Winds less than 25 kt. Seas up to 5 ft. Slight
chance of rain showers.
Monday: Winds less than 25 kt. Seas up to 5 ft.
&&
.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory from 5 PM this afternoon to 6 PM EDT
Friday for ANZ233.
Small Craft Advisory from 5 PM this afternoon to 2 AM EDT
Friday for ANZ234-236.
Small Craft Advisory from 7 AM this morning to 6 PM EDT Friday
for ANZ237.
Small Craft Advisory from 7 AM this morning to 8 PM EDT Friday
for ANZ235.
Small Craft Advisory from 8 AM to 8 PM EDT Friday for ANZ250.
Small Craft Advisory from 5 PM this afternoon to 8 PM EDT
Friday for ANZ254.
Small Craft Advisory until 8 PM EDT Friday for ANZ255.
Small Craft Advisory until 8 PM EDT Friday for ANZ256.
&&
$$
SYNOPSIS...Belk/BW
NEAR TERM...Belk
SHORT TERM...Belk
LONG TERM...BW
AVIATION...Belk/BW
MARINE...Belk/BW
Meta data
Point forecast:
https://api.weather.gov/gridpoints/BOX/64,79/forecast
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
Alerts:
https://api.weather.gov/alerts?active=1&point=42.4399,-71.2405