Lexington, Massachusetts, USA
32.0°F
0.0°C
Cold
Clear
Tonight: Lo 22 °F
Friday: Hi 30 °F
Dew Point:
22.6°F
Humidity: 68%
Barometer:
29.91 in
mb
Snow Today: 1.3 in
Snow Wednesday: Trace
February: 9.7 in
Winter: 20.9 in
Depth: 5.0 in
Visibility: 10 miles
Wind:
Now: 1 mph
Avg: 2 mph
Gusts: 12 mph
For Lexington, range of possible snowfall from 2.7 to 5.8". 4.3" expected.
Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Thu Feb 13, 2025 6:34pm EST
A cold front crossing the region early this evening will bring dry, but windy and colder weather tonight and Friday. Another system brings a round of wintry precipitation later Saturday into Sunday, starting as accumulating snow before changing to rain near the coast and a wintry mix inland. A shot of arctic air follows Monday and Tuesday along with strong winds.
Clear
Lo 22 °F
Clear, with a low around 22. West wind around 21 mph, with gusts as high as 47 mph.
Sunny
Hi 30 °F
Sunny, with a high near 30. West wind 17 to 23 mph, with gusts as high as 46 mph.
Partly Cloudy
Lo 12 °F
Partly cloudy, with a low around 12. West wind 5 to 18 mph.
Mostly Cloudy then Chance Light Snow
Hi 29 °F
A chance of snow after noon. Mostly cloudy, with a high near 29. Southwest wind around 5 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Snow
Lo 25 °F
Snow before 2am, then snow and sleet between 2am and 5am, then sleet and freezing rain. Cloudy, with a low around 25. Southeast wind 2 to 7 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 5 inches possible.
Sleet
Hi 37 °F
Sleet and freezing rain before 8am, then sleet and rain. Cloudy, with a high near 37. Northeast wind 8 to 12 mph, with gusts as high as 22 mph. Chance of precipitation is 100%.
Light Snow Likely
Lo 19 °F
Rain before 8pm, then sleet likely and freezing rain likely between 8pm and 9pm, then snow likely and sleet likely between 9pm and 3am. Mostly cloudy, with a low around 19. Northwest wind 9 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New snow accumulation of less than half an inch possible.
Partly Sunny
Hi 28 °F
Partly sunny, with a high near 28. West wind 16 to 21 mph, with gusts as high as 41 mph.
Mostly Clear
Lo 11 °F
Mostly clear, with a low around 11. West wind 14 to 17 mph, with gusts as high as 33 mph.
Sunny
Hi 24 °F
Sunny, with a high near 24. West wind around 15 mph, with gusts as high as 29 mph.
Partly Cloudy
Lo 8 °F
Partly cloudy, with a low around 8. West wind 9 to 13 mph, with gusts as high as 23 mph.
Mostly Sunny
Hi 27 °F
Mostly sunny, with a high near 27. West wind 8 to 12 mph.
Partly Cloudy then Slight Chance Light Snow
Lo 9 °F
A slight chance of snow after 5am. Partly cloudy, with a low around 9. Northwest wind around 8 mph.
Chance Light Snow
Hi 26 °F
A chance of snow. Partly sunny, with a high near 26. Northwest wind around 8 mph. Chance of precipitation is 30%.
Issued by:
National Weather Service Boston / Norton, MA
Updated Thu Feb 13, 2025 6:34pm EST
000 FXUS61 KBOX 132351 AFDBOX Area Forecast Discussion National Weather Service Boston/Norton MA 651 PM EST Thu Feb 13 2025 .SYNOPSIS... A cold front crossing the region early this evening will bring dry, but windy and colder weather tonight and Friday. Another system brings a round of wintry precipitation later Saturday into Sunday, starting as accumulating snow before changing to rain near the coast and a wintry mix inland. A shot of arctic air follows Monday and Tuesday along with strong winds. && .NEAR TERM /UNTIL 6 AM FRIDAY MORNING/... 645 PM update... Cold front has moved into western MA and will quickly sweep across rest of SNE this evening. Front will be followed by wind shift to W-WNW and increasing gusts. Low clouds will dissipate with clearing skies as much drier air moves in. Adjusted timing of stronger wind gusts for somewhat slower fropa. Previous discussion... Key Messages... * Windy & turning colder tonight * Westerly wind gusts of 35-50 mph with lows upper teens/20s * Wind Chills of 5 to 15 above zero by daybreak Low pressure will rapidly intensify tonight as it lifts into the Canadian Maritimes. This will result in a strong cold front crossing the region early this evening...scouring out the remaining low clouds and fog. The increasing pressure gradient will allow windy conditions to usher in a colder airmass despite skies becoming partly to mostly clear. 850T fall from between +4C to +8C this afternoon to between -14C/-15C by daybreak Friday. This will result in low temps by daybreak in the upper teens across parts of the high terrain in MA...to mainly the 20s elsewhere. This coupled with the windy conditions will result in wind chill values dropping to between 5 and 15 above zero by daybreak. Speaking of the winds...pretty good pressure rise couplet behind the cold front this evening with a strong northwest LLJ on the order of 50 to 60 knots. Steepening lapse rates should allow for northwest wind gusts of 35 to 50 mph this evening. A few places in the high terrain may even see brief gusts near 55 mph. We opted to extend the Wind Advisory for all locations generally near and northwest of the I-95 corridor...underneath the core of the low level jet. We may see a few brief gusts to advisory criteria across RI/SE MA...but felt it was too marginal to issue at this time. && .SHORT TERM /6 AM FRIDAY MORNING THROUGH FRIDAY NIGHT/... Key Messages... * Mostly sunny, windy & cold Fri with highs upper 20s/lower 30s * Cold with diminishing winds Fri night * Lows Fri night mainly in the teens with a few high single digits Details... Friday... Low pressure will continue to intensify Fri as it lifts even further north across the Canadian Maritimes. This will continue to result in cold advection with 850T on the order of -15C to -17C. Despite plenty of sunshine and good mixing...highs should be held in mainly the upper 20s to the lower 30s. Bufkit soundings show excellent mixing with very steep 1000 to 850 developing. So we should see a second burst of wind develop later in the morning into the mid afternoon. Therefore...we opted to extend the Wind Advisory into Fri afternoon generally near and northwest of the I-95 corridor. We expect northwest winds to gust to between 35 and 50 mph. This will keep wind chills in the teens Fri afternoon. Friday night... Large high pressure will build in from the west Fri night. This will allow for diminishing winds and a good night of radiational cooling. Model cross sections indicate some high cloudiness may overspread the region for the second half of the night...but probably will not have a significant impact on temps. Low temps should bottom out in the teens with even some single digits in the normally coldest outlying locations of west/northwest MA. && .LONG TERM /SATURDAY THROUGH THURSDAY/... Key Messages: * Next system arrives Saturday afternoon bringing snow to start followed by a transition to ice and rain by mid-morning Sunday. * Exact snow amounts uncertain but at least advisory level accumulations (3-6") for much of the region. * Windy conditions Monday. Below normal temperatures early next week. * Watching the potential for a coastal storm Weds - Thurs. Details: Saturday and Sunday Still tracking an active pattern for this weekend as a southern stream shortwave trough ejects northward ahead of a deep upper level trough. Ensemble means have shifted the storm track southeast with time as it moves northeast Saturday through Sunday. There is good confidence in this being a more amplified system compared to recent storms. As a result, models are in good agreement in a wide swath of 1+ inch QPF totals 18z Sat - 03Z Mon. Precipitation likely gets underway later Saturday afternoon. Cold air in place will result in widespread snow at the onset. Some mesoscale models indicate the potential for pockets of moderate snow beneath vigorous warm advection for a period of time late Saturday afternoon into the evening. Precip will eventually mix with and change to a wintry mix from south to north as the mid-level warm nose works its way north Saturday night into Sunday. The northward extent of the warmest air and plain rain is still in question. With a southern trend in the modeled storm track there is a chance that areas north of route 2 maintain sleet and freezing rain for the majority of the event. Further south, there is better confidence in a quicker transition from a mix to rain by Sunday afternoon, especially across the coastal plain. Despite differences in guidance, there is a good chance for widespread 2-4 to 3-6 inch snowfall totals for northern CT and most of MA, especially north of the Mass Pike. There is growing confidence that most of the CWA picks up advisory-level snow and ice accums. There is even a low probability of warning-level impacts north of the Mass Pike. A potent cold front sweeps through Sunday night followed by strong CAA. While the column will gradually dry out throughout the night, a few wrap-around rain and snow showers will likely linger, esp across northern Mass. Early Next Week: Little has changed with our thinking regarding the potential for strong winds on Monday. With strong CAA and a moderate LLJ overhead, the potential for stronger gusts should be supported. This will support Advisory/near Advisory winds across the CWA. The GFS even hinted at the threat for warning level winds across the higher terrain but this is a low probability scenario at the moment. Outside of the winds, anomalous cold is likely early next week. Ensembles indicate well-below average 850 mb(-15 to -20 C) temperatures overhead early next week. This will set the stage for below normal temperatures with highs in the 20s by Tuesday. By Wednesday there are some signs of upper level heights becoming more zonal which should help moderate temperatures back into the low 30s. Midweek: By midweek, models begin to change the longwave pattern over the CONUS. Several models are hinting at the potential for a coastal low pressure to ring in the large-scale pattern shift later in the period. While we are far away from specifics, ensembles have split into two distinct camps. The GEFS advertise a flatter wave of low pressure while the EPS show a more robust coastal low for the Thursday timeframe. && .AVIATION /00Z FRIDAY THROUGH TUESDAY/... Forecast Confidence Levels: Low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent. 00z TAF Update: High confidence in trends. Leftover MVFR-IFR cigs will break up and become VFR with clearing skies 01-03z. VFR tonight and Fri with W/NW winds gusting to 35kt at times, but as high as 40kt during day Fri before winds slowly subside Fri night. KBOS TAF...Moderate confidence. Timing of changes may be off by 1-2 hours, but more confident in clearing 23z-01z. High confidence in wind forecast. KBDL TAF...Moderate confidence. Timing of changes may be off by 1-2 hours. High confidence in wind forecast. Outlook /Saturday through Tuesday/... Saturday: Mainly VFR, with areas IFR possible. Breezy. Chance SN. Saturday Night: Mainly IFR, with local MVFR possible. Breezy. SN, FZRA, PL. Sunday: Mainly IFR, with areas MVFR possible. Breezy. RA, FZRA, PL. Sunday Night: MVFR/IFR conditions possible. Strong winds with local gusts up to 40 kt. FZRA likely, chance RA, chance SN. Washingtons Birthday: VFR. Strong winds with gusts up to 45 kt. Monday Night: VFR. Windy with gusts up to 35 kt. Tuesday: VFR. Windy with gusts up to 30 kt. && .MARINE... Forecaster Confidence Levels: Low - less than 30 percent. Medium - 30 to 60 percent. High - greater than 60 percent. Tonight and Friday...High Confidence. Low pressure will rapidly intensify as it lifts northeastward into the Canadian Maritimes tonight into Friday. This will result in strong cold air advection developing this evening along with a tight pressure gradient. Therefore...Gale Warnings are posted across all waters into Fri for WNW wind gusts of 30-40 knots with even a few gusts up to 45 knots. Seas will remain rough and we will see some light freezing spray develop toward daybreak Fri. Friday night...High Confidence. Winds/seas will be diminishing as high pressure builds in from the west. However...we still will need small craft headlines for many waters into a good portion of the night. Outlook /Saturday through Tuesday/... Saturday: Winds less than 25 kt. Chance of snow. Areas of visibility 1 to 3 nm. Saturday Night: Winds less than 25 kt. Seas locally approaching 5 ft. Snow, rain, freezing rain. Areas of visibility 1 nm or less. Sunday: Moderate risk for Small Craft Advisory winds with gusts up to 30 kt. Rough seas up to 12 ft. Rain. Local visibility 1 to 3 nm. Sunday Night: Strong winds with gusts up to 40 kt. Rough seas up to 14 ft. Chance of rain, freezing rain likely, slight chance of snow. Local visibility 1 to 3 nm. Washingtons Birthday: gale force winds with gusts up to 40 kt. Rough seas up to 14 ft. Freezing spray. Local visibility 1 to 3 nm. Monday Night: Moderate risk for gale force winds with gusts up to 40 kt. Rough seas up to 14 ft. Freezing spray. Tuesday: Strong winds with gusts up to 35 kt. Rough seas up to 12 ft. Freezing spray. && .BOX WATCHES/WARNINGS/ADVISORIES... CT...Wind Advisory until 4 PM EST Friday for CTZ002>004. MA...Wind Advisory until 4 PM EST Friday for MAZ002>016-026. RI...Wind Advisory until 4 PM EST Friday for RIZ001. MARINE...Gale Warning until 4 PM EST Friday for ANZ230-236. Gale Warning until 7 PM EST Friday for ANZ231>235-237-251-255- 256. Gale Warning until 10 PM EST Friday for ANZ250-254. && $$ SYNOPSIS...KJC/Frank/FT NEAR TERM...KJC/Frank SHORT TERM...Frank LONG TERM...KJC/FT AVIATION...KJC/FT/JWD MARINE...KJC/Frank/FT
Radar images courtesy Weather Underground / Intellicast.
UV Index forecast high for today: 3 Medium
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.
1.3 in
Snow Today:
Trace
Snow Wednesday:
9.7 in
February total:
20.9 in
Season total:
5.0 in
Snow Depth:
9 snow days in February
20 snow days this season
1:04pm
39.4°F
High today:
12:03am
31.1°F
Low today:
12:15pm
33.3°F
High Wednesday:
7:11am
22.5°F
Low Wednesday:
10:51pm
22.8°F
Low wind chill today:
8:11am
20.7°F
Low wind chill Wednesday:
1:04pm
38.1°F
High dew pt today:
11:29pm
28.4°F
High dew pt Wednesday:
9:27pm
22 mph
Wind gust today:
10:15pm
14 mph
Wind gust Wednesday:
First Light:
6:15am
Sunrise:
6:43am
Sunset:
5:15pm
Twilight ends:
5:44pm
Daylight length:
10 hours 31 minutes
Phase:
Waning Gibbous (98%)
Moon set:
7:24am
Moon rise:
6:31pm