Lexington Weather

Lexington, Massachusetts, USA

37°F

4/27/2024 5:57am

Lexington Conditions: Clear
Temperature: 37.0°F / 2.8°C
Dew Point: 31.1°F
Relative Humidity: 79%
Wind: Calm, 10-min avg: Calm, gust: None
Barometer: 30.46 in Steady
Visibility: 10 miles
Rain Today: 0.00 in

Southeast Middlesex County, MA - Frost Advisory
- SEE ALL NEARBY ALERTS -

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Current Conditions [‒] Current Conditions [+]

37.0°F Colder than last hour.

2.8°C

Chilly

Clear

Overnight: Lo 35 °F

Saturday: Hi 66 °F

Dew Point: 31.1°F Decreased 1.1°F since last hour.

Humidity: 79% Increased 3.0% since last hour.

Barometer: 30.46 in S

1031 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.00 in

Rain Friday: 0.00 in

Visibility: 10 miles

Wind:

Now: Calm

Avg: Calm

Gusts: 0 mph

OTHER PERSONAL WEATHER STATIONS

Alerts / Advisories [‒] Alerts / Advisories [+]

Southeast Middlesex County, MA - Frost Advisory
- SEE ALL NEARBY ALERTS -

Alerts active nearby in: Barnstable, MA; Bristol, RI; Dukes, MA; Eastern Essex, MA; Eastern Kent, RI; Eastern Plymouth, MA; Hartford, CT; Nantucket, MA; Newport, RI; Northern Bristol, MA; Northwest Providence, RI; Southeast Middlesex County, MA; Southeast Providence, RI; Southern Bristol, MA; Southern Plymouth, MA; Tolland, CT; Washington, RI; Western Kent, RI; Western Plymouth, MA; Windham, CT

NWS Weather Forecast -
Overnight, Saturday, & Saturday Night through Friday

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Sat Apr 27, 2024 2:49am EDT

Overview:

Quiet weather prevails Saturday, increasing clouds this afternoon ahead of a warm front, with scattered rain late tonight and tomorrow. Unsettled pattern sets up for Sunday into early next week, though the best chance for showers is around Tuesday or Wednesday and again on Friday. Temperatures turn quite mild for interior western New England Monday, but a backdoor cold front brings colder air to coastal areas. Onshore flow keeps temps cooler Tue/Wed before warming again late week.

Frost Advisory

Overnight:

Patchy Frost

Lo 35 °F

Patchy frost. Clear, with a low around 35. Southwest wind around 5 mph.

Saturday:

Patchy Frost then Mostly Sunny

Hi 66 °F

Patchy frost before 7am. Mostly sunny, with a high near 66. South wind 3 to 8 mph.

Saturday Night:

Mostly Cloudy then Slight Chance Rain Showers

Lo 45 °F

A slight chance of rain showers after 1am. Mostly cloudy, with a low around 45. South wind around 8 mph. Chance of precipitation is 20%.

Sunday:

Slight Chance Rain Showers then Mostly Cloudy

Hi 69 °F

A slight chance of rain showers before 7am. Mostly cloudy, with a high near 69. Southwest wind around 9 mph. Chance of precipitation is 20%.

Sunday Night:

Slight Chance Light Rain

Lo 55 °F

A slight chance of rain showers between 8pm and 9pm, then a slight chance of rain between 9pm and 1am. Mostly cloudy, with a low around 55. West wind around 9 mph. Chance of precipitation is 20%.

Monday:

Mostly Sunny then Slight Chance Light Rain

Hi 70 °F

A slight chance of rain after 2pm. Mostly sunny, with a high near 70. North wind around 10 mph. Chance of precipitation is 20%.

Monday Night:

Chance Light Rain

Lo 48 °F

A chance of rain. Mostly cloudy, with a low around 48. East wind around 8 mph. Chance of precipitation is 30%.

Tuesday:

Chance Light Rain

Hi 57 °F

A chance of rain. Mostly cloudy, with a high near 57. East wind around 10 mph. Chance of precipitation is 40%.

Tuesday Night:

Chance Light Rain

Lo 45 °F

A chance of rain. Mostly cloudy, with a low around 45. East wind around 10 mph. Chance of precipitation is 40%.

Wednesday:

Chance Light Rain then Mostly Cloudy

Hi 58 °F

A chance of rain before 10am. Mostly cloudy, with a high near 58. East wind around 10 mph. Chance of precipitation is 30%.

Wednesday Night:

Mostly Cloudy

Lo 44 °F

Mostly cloudy, with a low around 44. South wind around 9 mph.

Thursday:

Mostly Sunny

Hi 69 °F

Mostly sunny, with a high near 69. South wind 7 to 13 mph.

Thursday Night:

Chance Light Rain

Lo 50 °F

A chance of rain after 11pm. Mostly cloudy, with a low around 50. South wind 9 to 13 mph. Chance of precipitation is 40%.

Friday:

Chance Light Rain

Hi 70 °F

A chance of rain. Partly sunny, with a high near 70. Southwest wind 9 to 14 mph. Chance of precipitation is 50%.

FULL FORECAST

NWS Hourly Forecast -
Today 5am through Sun 4am

Issued by:
National Weather Service Boston / Norton, MA
Updated Sat Apr 27, 2024 2:49am EDT

5:00am

Patchy Frost

36°F
Dew Pt 30°F
Wind Chill: 32°F
Wind from SW

SW 5 mph
Precip: 0%

6:00am

Patchy Frost

38°F
Dew Pt 31°F
Wind Chill: 33°F
Wind from SW

SW 5 mph
Precip: 0%

7:00am

Sunny

38°F
Dew Pt 32°F
Wind Chill: 37°F
Wind from W

W 5 mph
Precip: 0%

8:00am

Sunny

44°F
Dew Pt 33°F
Wind Chill: 41°F
Wind from W

W 5 mph
Precip: 0%

9:00am

Sunny

49°F
Dew Pt 33°F
Wind Chill: 47°F
Wind from SW

SW 5 mph
Precip: 0%

10:00am

Sunny

54°F
Dew Pt 33°F
Wind from S

S 3 mph
Precip: 0%

11:00am

Sunny

58°F
Dew Pt 34°F
Wind from S

S 3 mph
Precip: 0%

12:00pm

Sunny

62°F
Dew Pt 33°F
Wind from S

S 3 mph
Precip: 0%

1:00pm

Mostly Sunny

64°F
Dew Pt 32°F
Wind from S

S 5 mph
Precip: 0%

2:00pm

Mostly Sunny

65°F
Dew Pt 31°F
Wind from S

S 6 mph
Precip: 0%

3:00pm

Mostly Sunny

65°F
Dew Pt 31°F
Wind from S

S 7 mph
Precip: 0%

4:00pm

Partly Sunny

64°F
Dew Pt 32°F
Wind from SE

SE 7 mph
Precip: 0%

5:00pm

Partly Sunny

64°F
Dew Pt 32°F
Wind from SE

SE 8 mph
Precip: 0%

6:00pm

Mostly Cloudy

61°F
Dew Pt 32°F
Wind from SE

SE 8 mph
Precip: 0%

7:00pm

Mostly Cloudy

59°F
Dew Pt 32°F
Wind from S

S 7 mph
Precip: 0%

8:00pm

Mostly Cloudy

57°F
Dew Pt 33°F
Wind from S

S 7 mph
Precip: 1%

9:00pm

Mostly Cloudy

54°F
Dew Pt 32°F
Wind from S

S 7 mph
Precip: 2%

10:00pm

Mostly Cloudy

52°F
Dew Pt 32°F
Wind from SW

SW 7 mph
Precip: 4%

11:00pm

Mostly Cloudy

51°F
Dew Pt 32°F
Wind from SW

SW 7 mph
Precip: 6%

Sun
12:00am

Mostly Cloudy

49°F
Dew Pt 32°F
Wind Chill: 46°F
Wind from SW

SW 7 mph
Precip: 11%

Sun
1:00am

Slight Chance Rain Showers

48°F
Dew Pt 33°F
Wind Chill: 46°F
Wind from SW

SW 7 mph
Precip: 15%

Sun
2:00am

Slight Chance Rain Showers

47°F
Dew Pt 33°F
Wind Chill: 45°F
Wind from SW

SW 7 mph
Precip: 20%

Sun
3:00am

Slight Chance Rain Showers

46°F
Dew Pt 35°F
Wind Chill: 44°F
Wind from SW

SW 7 mph
Precip: 19%

Sun
4:00am

Slight Chance Rain Showers

46°F
Dew Pt 36°F
Wind Chill: 42°F
Wind from SW

SW 7 mph
Precip: 19%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 270733
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
333 AM EDT Sat Apr 27 2024

.SYNOPSIS...
Quiet weather prevails Saturday, increasing clouds this 
afternoon ahead of a warm front, with scattered rain late 
tonight and tomorrow. Unsettled pattern sets up for Sunday into
early next week, though the best chance for showers is around 
Tuesday or Wednesday and again on Friday. Temperatures turn 
quite mild for interior western New England Monday, but a 
backdoor cold front brings colder air to coastal areas. Onshore 
flow keeps temps cooler Tue/Wed before warming again late week. 

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
Highlights: 

* Frost Advisory continues through 8 AM due to temperatures in the 
  low 30s. Though, a few prone locations that effectively radiate 
  have dropped into the 20s. 

Persistent weather pattern with surface high pressure dominating the 
forecast yet another day. Hard to complain over seasonable afternoon 
temperatures and wall-to-wall sunshine. Visually, the more notable 
difference will be increasing high clouds ahead of a warm front mid 
to late afternoon. Fairly comfortable temperature-wise as we warm 
into the 60s, perhaps near 70 degrees in the CT River Valley and 
Merrimack Valley. Areas along the coast remain cooler, here the high 
reaches the middle and upper 50s due to the seabreeze. At the coast 
wind speeds are roughly 10 to 15 mph, inland winds are light and 
from the southwest. 

&&

.SHORT TERM /6 PM THIS EVENING THROUGH 6 PM SUNDAY/...
Highlights: 

* Sct'd rain, mainly western areas, as a warm front lifts across 
  southern New England.

* No washout Sunday, but a rouge shower or two are possible. More 
  clouds than sunshine, though temperatures remain mild. 

Tonight:

As we transition from late afternoon to early evening clouds thicken 
and lower ahead of a warm front that brings sct'd rain chances to 
southern New England during the overnight hours. Think the greatest 
chance for rain are western Massachusetts and Connecticut. Rain will 
be light due to the amount of dry air still at the surface because 
of the persistent surface high pressure system situated over the 
region. In fact, areas east of the I-95 corridor may remain dry and 
not see a drop of rain. Given the cloudy conditions and southwest 
flow the temperatures overnight will remain warm, comparatively to 
the previous few nights - overnight temperatures range from the low 
to middle 40s. 

Sunday:

Warm front lifts through and we are left with variable cloud cover, 
still can not rule out a spot/brief shower as southern New England 
is situated on the northeastern edge of the mid-level ridge. A few 
pulses of mid-level energy traverse through during the afternoon, it 
is from this we maintained a slight chance for light rain - do not 
go canceling your outdoor plans. Despite the lack of full sunshine a 
warmer afternoon is likely with highs away from the coast in the 
upper 60s to low 70s. Southwest will provide an onshore wind for the 
south coast of RI and MA, here it is cooler, upper 50s to low 60s. 

&&

.LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/...
Key Points...

* Periodic rain chances through the week, first Tue/Wed then again 
  on Friday. 

* After a warm start to the week (moreso for western SNE) temps cool 
  Tue/Wed before warming back up late week. 

Details...

Southern New England will alternate between being on the northern 
periphery of a mid level ridge and beneath a series of passing 
shortwave troughs which will bring periodic rain chances to the 
region with a fluctuating temperature forecast. 

Monday...

Despite mid level ridging overhead a surface low dropping from 
northern New England along with subtle impulses around the top of 
the ridge will bring widely scattered showers to the region, though 
most will stay dry. The biggest forecast challenge is the high 
temperature for the day as, despite a very warm airmass trying to 
move north, the dropping low will deliver a back door cold front 
sometime Monday. Guidance is slowing the arrival of the front which 
would allow more warming to near or above 70F even for portions of 
central/eastern MA (away from the immediate coast). Ensemble 
guidance indicates a 90%+ chance of temps over 70F in western MA/CT 
and even a 70-80% chance as far east as RI. Along the east coast 
temps likely don't break out of the 60s (or even 50s on the outer 
Cape). 

Tuesday and Wednesday...

The first shortwave of the week moves through Tuesday with a weak 
surface reflection. This leads to increasing rainfall chances 
Tuesday into Wednesday. Though a few rumbles of thunder are 
possible, things have slowed down a bit which would keep the better 
instability to our west and limit thunderstorms here if it looses 
the help from daytime heating. Details on exact timing and placement 
of rain showers are unclear at this time, but the temperature 
forecast is more certain; onshore flow should keep temperatures in 
the 50s (east) and 60s (west). 

Thursday and Friday...

Brief mid level ridging on Thursday will bring drier weather and 
decreasing clouds along with rebounding temperatures as SW flow 
returns. Another frontal system from the Ohio Valley then approaches 
on Friday bringing rain back into the forecast. Warmer air surging 
north ahead of this system brings highs back into the low 70s.

&&

.AVIATION /08Z SATURDAY THROUGH WEDNESDAY/...
Forecast Confidence Levels:

Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent. 

06z TAF Update:

Today... High confidence.

VFR. Increasing canopy of high clouds late. Light SW winds increase 
thru the day to around 7-10 kt; though sea-breezes again develop 
near the coasts between 14-16z. 

Tonight... High confidence in trends though moderate on exact 
timing. 

Cigs start VFR but will be steadily lowering. Best chance at sub-VFR 
ceilings and light rain showers is after 06z and mainly from ORH 
westward; cigs could be as low as IFR but think MVFR predominate for 
those interior western terminals. Still think we're looking at OVC 
VFR for eastern terminals. SW winds around 8-12 kt to start, but 
decrease to around 5-8 kt late. 

Sunday... High confidence. 

MVFR/IFR cigs early in the morning with sct'd -SHRA. Improving cigs 
after 16z, trending VFR some time after 18z/20z. SW winds 8-12 kt. 

KBOS TAF...High confidence in TAF. VFR. Winds are light southerly 
through 12z. Seabreezes again likely, following similar 14-16z 
timeframe as prior days.

KBDL TAF...High confidence in TAF. VFR. Light south wind most of 
today around 4-7 kt and through tonight. Cigs lower to MVFR after 
04z/06z Sunday with sct'd -SHRA.

Outlook /Sunday Night through Wednesday/... 

Sunday Night: VFR. Slight chance RA.

Monday through Monday Night: Mainly VFR, with local MVFR
possible. Slight chance RA.

Tuesday: Mainly VFR, with areas MVFR possible. Chance RA.

Tuesday Night: Mainly VFR, with areas IFR possible. Chance RA.

Wednesday: Mainly VFR, with local IFR possible. 

&&

.MARINE...
Forecaster Confidence Levels:

Low - less than 30 percent.
Medium - 30 to 60 percent.
High - greater than 60 percent. 

Today through Sunday... High confidence.

Tranquil boating conditions for mariners through most of today and 
this evening, there is a low chance for showers on the southern 
waters late tonight into pre-dawn Sunday. 

Southwest winds increase to 10 to 15 knots on all waters today and 
Sunday, though will become east/southeast on the eastern nearshore 
waters late this morning to early evening. 

Seas mainly 3ft or less all waters.

Outlook /Sunday Night through Wednesday/... 

Sunday Night: Winds less than 25 kt. Slight chance of rain. 

Monday: Winds less than 25 kt. 

Monday Night through Tuesday: Winds less than 25 kt. Slight
chance of rain. 

Tuesday Night: Winds less than 25 kt. Chance of rain. 

Wednesday: Winds less than 25 kt. Seas locally approaching
5 ft. Slight chance of rain. 

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...Frost Advisory until 8 AM EDT this morning for CTZ002>004.
MA...Frost Advisory until 8 AM EDT this morning for MAZ007-014-
     017>024.
RI...Frost Advisory until 8 AM EDT this morning for RIZ001>007.
MARINE...None.

&&

$$

SYNOPSIS...BW/Dooley
NEAR TERM...Dooley
SHORT TERM...Dooley
LONG TERM...BW
AVIATION...BW/Dooley
MARINE...BW/Dooley