Lexington Weather
Lexington, Massachusetts, USA
- Mostly cloudy
-
71.1°F / 21.7°C
-
61.5°F
-
72%
-
SW 1 mph, 10-min avg: 1 mph, gust: 3 mph
- 10 miles
- 0.00 in
National Weather Service Forecast for:
Lexington, MA
Issued by:
National Weather Service Boston / Norton, MA
Today through Wednesday Night
Point Forecast Updated Thu Jul 7, 2022 6:48am EDT
Overview:
Slightly cooler than normals temps today followed by more seasonable temps tomorrow. May be a few showers with a weak frontal passage Friday afternoon. High pressure delivers a period of beautiful summer weather this weekend into early next week, with warm days and cool nights, along with comfortable humidity. A cold front brings the next chance for widespread rains around Tuesday or Wednesday.
Today:
Partly Sunny
Hi 77 °F
Partly sunny, with a high near 77. Southeast wind 2 to 10 mph.
Tonight:
Mostly Cloudy
Lo 64 °F
Mostly cloudy, with a low around 64. South wind 3 to 10 mph.
Friday:
Slight Chance Rain Showers
Hi 82 °F
A slight chance of rain showers after 11am. Mostly sunny, with a high near 82. Southwest wind 3 to 7 mph. Chance of precipitation is 20%.
Friday Night:
Mostly Cloudy
Lo 63 °F
Mostly cloudy, with a low around 63. Northwest wind around 7 mph.
Saturday:
Mostly Sunny
Hi 79 °F
Mostly sunny, with a high near 79. Northeast wind around 7 mph.
Saturday Night:
Mostly Clear
Lo 55 °F
Mostly clear, with a low around 55. North wind 2 to 6 mph.
Sunday:
Sunny
Hi 80 °F
Sunny, with a high near 80. Northeast wind 3 to 7 mph.
Sunday Night:
Mostly Clear
Lo 58 °F
Mostly clear, with a low around 58. South wind around 7 mph.
Monday:
Mostly Sunny
Hi 86 °F
Mostly sunny, with a high near 86. Southwest wind 5 to 12 mph.
Monday Night:
Partly Cloudy
Lo 66 °F
Partly cloudy, with a low around 66. Southwest wind 7 to 12 mph, with gusts as high as 23 mph.
Tuesday:
Mostly Sunny then Chance Showers And T-Storms
Hi 88 °F
A slight chance of rain showers between 1pm and 4pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 88. Southwest wind 8 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 30%.
Tuesday Night:
Chance Showers And T-Storms
Lo 69 °F
A chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Southwest wind 6 to 12 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.
Wednesday:
Chance Rain Showers then Chance Showers And T-Storms
Hi 87 °F
A chance of rain showers before 5pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 87. Southwest wind 6 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.
Wednesday Night:
Chance Showers And T-Storms
Lo 66 °F
A chance of showers and thunderstorms. Partly cloudy, with a low around 66. Southwest wind 2 to 8 mph. Chance of precipitation is 30%.
Today 9am through Fri 12am EDT
Updated Thu Jul 7, 2022 6:48am EDT
9:00am
Dew Pt 59°F
NE 5 mphPrecip: 2%
10:00am
Dew Pt 58°F
SE 2 mphPrecip: 2%
11:00am
Dew Pt 58°F
SE 5 mphPrecip: 2%
12:00pm
Dew Pt 58°F
SE 7 mphPrecip: 3%
1:00pm
Dew Pt 58°F
S 7 mphPrecip: 3%
2:00pm
Dew Pt 58°F
S 5 mphPrecip: 4%
3:00pm
Dew Pt 58°F
SE 7 mphPrecip: 4%
4:00pm
Dew Pt 59°F
SE 10 mphPrecip: 4%
5:00pm
Dew Pt 59°F
SE 10 mphPrecip: 4%
6:00pm
Dew Pt 58°F
S 8 mphPrecip: 4%
7:00pm
Dew Pt 58°F
S 10 mphPrecip: 3%
8:00pm
Dew Pt 58°F
S 7 mphPrecip: 3%
9:00pm
Dew Pt 58°F
S 6 mphPrecip: 3%
10:00pm
Dew Pt 59°F
S 6 mphPrecip: 4%
11:00pm
Dew Pt 59°F
S 6 mphPrecip: 5%
12:00am
Dew Pt 59°F
S 6 mphPrecip: 5%
FORECAST DISCUSSION
Area Forecast Discussion
for Boston / Norton, MA
000
FXUS61 KBOX 071107
AFDBOX
Area Forecast Discussion
National Weather Service Boston/Norton MA
707 AM EDT Thu Jul 7 2022
.SYNOPSIS...
Slightly cooler than normals temps today followed by more
seasonable temps tomorrow. May be a few showers with a weak
frontal passage Friday afternoon. High pressure delivers a
period of beautiful summer weather this weekend into early next
week, with warm days and cool nights, along with comfortable
humidity. A cold front brings the next chance for widespread
rains around Tuesday or Wednesday.
&&
.NEAR TERM /UNTIL 6 PM THIS EVENING/...
700 AM Update:
Adjusted winds/wind directions to better show the anticipated
development of onshore winds (sort of a synoptic gradient/sea-
breeze hybrid). Overall no significant changes and have
otherwise incorporated current observations and blended into the
forecast. Shaping up to be a pleasant Thursday under high
pressure - enjoy!
Previous discussion:
Today
Surface high pressure shifts east of the region today. This will
support a south/southeasterly flow into southern New England. With
flow off the cooler ocean waters, expect temps to be around or
slightly below normal for early July with high temps topping out in
the mid 70s along the coast and upper 70s to low 80s across the
interior. Dewpoints generally in the upper 50s will support
comfortable humidity levels. Expect increasing cloudiness during the
afternoon hours, especially across the western areas.|
&&
.SHORT TERM /6 PM THIS EVENING THROUGH 6 PM FRIDAY/...
Tonight
Mainly zonal flow in the mid and upper levels will support another
night of quiet weather. Boundary layer winds becomes more
southwesterly overnight. This will allow dewpoints to come up a bit
before sunrise. Nonetheless, a comfortable evening with lows
bottoming out in the upper 50s to low 60s.
Tomorrow
Temperatures and humidity climb back up tomorrow as low-level
southwesterly flow prevails over southern New England. Expect more
seasonable temperatures with highs in the low to mid 80s. Weak
surface front will push through the region during the mid to late
afternoon. This will support a wind shift to the northwest by
tomorrow evening. Can't rule out a few isolated to scattered showers
as this front slides through the region. Both deep layer moisture
and synoptic forcing will be lacking, thus not expecting any
widespread or persistent precipitation with the frontal passage.
&&
.LONG TERM /FRIDAY NIGHT THROUGH WEDNESDAY/...
Highlights:
* Lengthy stretch of pleasant, tranquil summer weather with plenty
of sun, low humidity and dry weather Sat thru Mon.
* Turning warmer and more humid into midweek ahead of a cold front
passing through either later Tues or into Wed.
Details:
Friday Night:
Cold front from the daytime hrs Fri will get more of a southeastward
push Fri evening into our coastal waters from a shearing-out
shortwave moving into northern New England. Short-lived period of
higher moisture could support continued generally light rain showers
but the frontal boundary more or less passes SE with little fanfare.
Decreasing clouds from NW to SE and a SW to N/NE wind shift for the
remainder of the evening, with lows in the mid 50s to mid 60s,
mildest south, coolest north/northwest.
Saturday through Monday Night:
Continued generally strong multi-model consensus in a Canadian-
origin anticyclone and related ridging/subsidence governing
conditions across SNE through much of this period. As much as 2.5
sigma PWAT anomalies support dry weather with comfortable humidity
levels ideal for any outdoor plans. It is worth noting the 00z/7th
NAM generates a decent slug of QPF into interior CT, RI and SE MA,
well north of a sfc low over the mid-Atlantic region but view this
as an outlier compared to good consensus for dry weather across the
global models/ensemble means.
Thus for the weekend, expect full sun and rather deep mixing during
the daytime with modest NW to NEly breezes and good radiational
cooling at night. Highs mid 70s to lower 80s, with lows in the 50s
to near 60. As high pressure settles into the waters south of SNE on
Mon, ensuing warm advection pattern should bring warmer temperatures
(upper 70s-mid 80s) and SWly breezes.
Tuesday and Wednesday:
Surface frontal system with weak low pressure will be the focus in
this period, but did note more variation across the guidance with
regard to the timing. The progressive GFS supports a frontal passage
around Tues-early Tues night; on the other hand the ECMWF supports a
frontal passage closer to Tues evening into part of Wed. Thus given
more solution spread in timing carried Chance-level PoP for
showers/t-storms into at least the first part of Wed. Given
amplification of the Intermountain West heat ridge in this period, a
hedge toward the slower ECMWF idea might seem more appropriate but
still plenty of time to sort through the timing over the next few
days. Pending timing of the frontal passage, Tues into Wed would
feature elevated humidity levels and summerlike temperatures in the
middle to upper 80s.
&&
.AVIATION /12Z THURSDAY THROUGH MONDAY/...
Forecaster Confidence Levels:
Low - less than 30 percent.
Medium - 30 to 60 percent.
High - greater than 60 percent.
12z TAF Update:
Today: High confidence.
VFR. Outside chance at MVFR across the ridgelines of the
Berkshires later in the day. Most of the FM groups in TAFs are
essentially wind direction changes. Winds trend from N to NE/E
and eventually SE/S as the day moves on.
Thursday night...moderate confidence for VFR except MVFR across
CT into western-central MA, dry weather and light S-SE winds.
Friday...VFR. Light south/southwest winds.
KBOS...High confidence in TAF. N winds trend NE/ENE 14-16z
before becoming SE/S late in the day.
KBDL...High confidence in TAF.
Outlook /Friday Night through Monday/...
Friday Night through Sunday Night: VFR.
Monday: VFR. Breezy.
&&
.MARINE...
Forecaster Confidence Levels:
Low - less than 30 percent.
Medium - 30 to 60 percent.
High - greater than 60 percent.
Today through Friday...High confidence
Calm conditions expected over the coastal waters over the next 48
hours. Seas range from 1 to 2 feet in the near-shore zones and 2 to
3 feet in the outer zones. Light south/southeast winds today and
tonight. Winds becoming more southwesterly during the day Friday.
Outlook /Friday Night through Monday/...
Winds less than 25 kt.
&&
.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...None.
&&
$$
SYNOPSIS...Nocera/Chai
NEAR TERM...Loconto/RM
SHORT TERM...RM
LONG TERM...Loconto
AVIATION...Loconto/RM
MARINE...Loconto/Chai
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