Lexington, Massachusetts, USA
29.5°F
-1.4°C
Cold
Clear
Overnight: Lo 29 °F
Thursday: Hi 45 °F
Dew Point:
23.5°F
Humidity:
78%
UV Index: 0.0 None
Barometer:
mb
Rain Rate: 0.00 in/hr
Rain Today: 0.00 in
Rain Wednesday: 0.02 in
Visibility: 10 miles
Wind:
Now: Calm
Avg: Calm
Gusts: 0 mph
Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Wed Feb 8, 2023 6:32pm EST
High pressure builds into the region tonight. Low pressure then tracks northwest of our region Thursday and Thursday night bringing showers to southern New England. Mainly rain is expected with this system, with a low probability of a wintry mix Thursday afternoon across far NW MA. Unseasonably mild temperatures, close to the records for the day, follow on Friday. Cooler and more seasonable weather returns this weekend. Low pressure moving off the mid Atlc coast is expected to remain well south of New England, but the northern extent of the precipitation shield may make it into portions of the region late Sunday into early Monday.
Partly Cloudy
Lo 29 °F
Partly cloudy, with a low around 29. West wind around 5 mph.
Mostly Cloudy then Chance Light Rain
Hi 45 °F
A chance of rain after noon. Mostly cloudy, with a high near 45. South wind 2 to 9 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Light Rain Likely
Lo 40 °F ↑
A chance of rain before 7pm, then rain likely and patchy fog between 7pm and 2am. Cloudy. Low around 40, with temperatures rising to around 55 overnight. South wind 8 to 15 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
Mostly Sunny
Hi 56 °F
Mostly sunny, with a high near 56. West wind 16 to 22 mph, with gusts as high as 32 mph.
Mostly Cloudy
Lo 32 °F
Mostly cloudy, with a low around 32. West wind 10 to 15 mph.
Mostly Sunny
Hi 40 °F
Mostly sunny, with a high near 40. Northwest wind 12 to 17 mph.
Mostly Clear
Lo 21 °F
Mostly clear, with a low around 21. West wind 8 to 12 mph.
Mostly Sunny then Slight Chance Light Rain
Hi 40 °F
A slight chance of rain after 5pm. Mostly sunny, with a high near 40. South wind 7 to 10 mph.
Chance Light Rain
Lo 31 °F
A chance of rain. Mostly cloudy, with a low around 31. Northeast wind 9 to 13 mph. Chance of precipitation is 30%.
Slight Chance Rain And Snow then Partly Sunny
Hi 43 °F
A slight chance of rain and snow before 7am. Partly sunny, with a high near 43. North wind 13 to 17 mph.
Mostly Cloudy
Lo 29 °F
Mostly cloudy, with a low around 29. Northwest wind 6 to 10 mph.
Partly Sunny
Hi 50 °F
Partly sunny, with a high near 50. Southwest wind 7 to 12 mph.
Mostly Cloudy then Slight Chance Rain Showers
Lo 33 °F
A slight chance of rain showers after 1am. Mostly cloudy, with a low around 33. Southwest wind around 12 mph.
Chance Rain Showers
Hi 51 °F
A chance of rain showers. Mostly cloudy, with a high near 51. Southwest wind 10 to 17 mph. Chance of precipitation is 50%.
Issued by:
National Weather Service Boston / Norton, MA
Updated Wed Feb 8, 2023 6:32pm EST
000 FXUS61 KBOX 090627 AFDBOX Area Forecast Discussion National Weather Service Boston/Norton MA 127 AM EST Thu Feb 9 2023 .SYNOPSIS... High pressure builds into the region tonight. Low pressure then tracks northwest of our region Thursday and Thursday night bringing showers to southern New England. Mainly rain is expected with this system, with a low probability of a wintry mix Thursday afternoon across far NW MA. Unseasonably mild temperatures, close to the records for the day, follow on Friday. Cooler and more seasonable weather returns this weekend. Low pressure moving off the mid Atlc coast is expected to remain well south of New England, but the northern extent of the precipitation shield may make it into portions of the region late Sunday into early Monday. && .NEAR TERM /UNTIL 6 AM THIS MORNING/... 930PM Update... Clear conditions continue to dominate the region this evening, supporting healthy radiational cooling; the temperature dropping 4 degrees here at the office in just the last hour. Radiational cooling will continue for the next few hours but will be capped earlier across our western zones as high clouds move in from the SW. Otherwise, forecast remains on track, see previous updates for more detail. 640 PM update... High pres builds into New Eng tonight with diminishing winds becoming near calm. Clear skies will give way to increasing high clouds overnight. A period of good radiational cooling during the first half of the night will allow temps to fall quickly before leveling off later tonight. Expected lows will drop into the mid/upper 20s, except lower 30s near the coast. Forecast on track. Previous discussion... A building mid level ridge and increasing subsidence from an approaching surface high pressure center are allowing for increasingly clear skies over southern New England. While mid level moisture has held on longer than expected, clear skies finally arrived and should stick around until the early overnight hours. That's when an approaching warm front will move in, first in the upper levels, leading a deck of cirrus clouds to overspread from southwest to northeast. These clouds will thicken and lower through the night. So, while winds will come down tonight as the high moves overhead, this will be later in the night when cloudcover is thicker. So, have only tweaked low temperatures a bit lower to account for some radiational cooling. Expect lows in the upper 20s and low 30s. && .SHORT TERM /6 AM THIS MORNING THROUGH 6 PM FRIDAY/... Thursday starts with mostly cloudy skies, quickly becoming overcast as the surface warm front lifts through. This is associated with a vertically stacked low which will move from the Great Lakes into Canada, well to our north and west over the next 24 hours. What this means for us is that any precipitation that falls will be in the form of rain, with temperatures on Thursday reaching well into the 40s. As the system moves closer it generates a 45 to 55 kt low level jet overhead which, while it will help provide lift for rain showers, will struggle to mix down to the surface. BUFKIT soundings show a stout inversion around 920 mb which should keep the stronger winds aloft until cold advection kicks in on Friday. The best chance for rain showers, especially early on, is for northern MA in closest proximity to the better forcing. While scattered showers are possible for all of southern New England during the evening and early overnight hours, rain shuts off after midnight as a mid level dry slot moves overhead. && .LONG TERM /FRIDAY NIGHT THROUGH WEDNESDAY/... Highlights... * Windy & unseasonably mild Fri. Near record high temps. * Cooler and more seasonable this weekend. Some rain may make into southern portions of SNE late Sun into early Mon, with a lower risk of rain or snow/mixed precip further N. * Above normal temps early next week Friday... Rather mild start to the day with temps well into the 40s to lower 50s. Cold front will be moving off the coast in the morning with cooling low level temps. Afternoon 925 mb temps around 5C with good mixing and westerly flow supports highs well into the 50s in the coastal plain and lower CT valley, with perhaps temps near 60 in a few spots across SE MA. Some diurnal cloud cover expected, otherwise partly to mostly sunny skies. The mild temps will be accompanied by windy conditions as well mixed boundary layer supports 25-40 mph gusts. Northern stream trough approaches Fri night with backing flow which will allow clouds to increase but area of southern stream moisture expected to remain to the south, with just a low risk a few showers could clip the Islands. Saturday through Monday... Northern stream trough sweeps through Sat morning followed by NW flow and drying column. Expect lots of sunshine and cooler temps in the upper 30s and lower 40s. Cold night Sat night as high pres builds into New Eng with good radiational cooling resulting in lows in the teens and 20s. Then a southern stream low will emerge off the mid Atlc coast Sun night passing well south of New Eng Monday. However, building ridge ahead of this system expected to allow moisture to lift further N and possibly get into SNE. Expect much of Sunday to be dry, but it is possible some rain may begin to move into south coastal areas by late Sun. There is still uncertainty with how far north precip shield will get but confidence is increasing in a period of rain getting to at least the south coast through Sun night. And there is enough ensemble support for a low to moderate risk of precip making it further N into SNE with the threat of some wet snow or mixed precip the further N it makes it across SNE. Gusty NE winds also a risk near the coast with a modest low level jet developing. It appears precip could linger into Mon, especially near the coast but trend will be for improving conditions later Mon as storm pulls away. Tuesday and Wednesday... Above normal temps expected Tue/Wed but lower confidence on PoPs/timing as an active pattern persists with multiple shortwaves rotating through a somewhat amplified flow pattern. GEFS and ECENS suggest mostly dry Tue with greater risk of showers Wed. && .AVIATION /06Z THURSDAY THROUGH MONDAY/... Forecaster Confidence Levels: Low - less than 30 percent. Medium - 30 to 60 percent. High - greater than 60 percent. 06Z TAF Update... Today... High Confidence in trends, moderate confidence in exact timing. VFR for the better portion of the day. MVFR and IFR developing after 18Z first across the west and overspreading east through the evening as light rainshowers develop. IFR most likely at western terminals prior to 00Z. Calm winds this morning build to around 15 knots by this afternoon. Thursday night...moderate confidence. IFR gradually spreading from west to east as rain continues to overspread. Rain will be mainly light in nature, but will persist in areas from about 00Z to 12Z. Southerly winds building from the southwest near sunrise to 15-25kt, highest across the Cape and Islands. LLWS likely as LLJ of 40kt+ builds near 2k ft. Friday... high confidence. Showers come to an end quickly Friday morning giving way to sunshine. Any lingering IFR/MVFR will scour out to VFR between 12-15Z. SW winds become W/NW by afternoon. Quite blustery with gusts 30-40kt, highest across the high terrain of western MA. Lingering LLWS across the Cape and Islands possible Friday AM. KBOS Terminal...High Confidence in TAF. VFR through about 00Z this evening before MVFR and eventually IFR conditions develop. Spotty rain showers likely at times between 00Z and 06Z Friday. Calm winds build from the south today to around 15kt. Winds gradually shift SW/W overnight Friday. KBDL Terminal...High Confidence in TAF. VFR through this afternoon, periods of MVFR between 21-00Z with localized IFR possible before 00Z with more widespread IFR after 00Z. Scattered rain showers between 18-06Z. Southerly winds today around 15 kt build from the W/SW overnight to near 20kt. Outlook /Friday Night through Monday/... Friday Night: VFR. Windy with gusts up to 35 kt. Saturday: VFR. Windy with local gusts up to 30 kt. Saturday Night: VFR. Sunday: VFR. Breezy. Slight chance RA. Sunday Night: VFR. Windy with areas of gusts up to 30 kt. Chance RA, slight chance FZRA, slight chance SN. Monday: Mainly VFR, with local MVFR possible. Windy with gusts up to 35 kt. && .MARINE... Forecaster Confidence Levels: Low - less than 30 percent. Medium - 30 to 60 percent. High - greater than 60 percent. Tonight... High pressure builds over the coastal waters tonight with lighter winds and decreasing seas. Conditions will fall below small craft criteria across the outer waters overnight. Thursday... NW flow gradually shifts to the south and builds through the day Thursday. Winds remain below small craft thresholds. Seas gradually build to near 5 feet again. Thursday night...SW winds increasing to 15-20kt gusting 25 to 30 kt. Seas build to 5 to 7 ft for the outer waters. Outlook /Friday Night through Monday/... Friday Night: Low risk for Small Craft Advisory winds with gusts up to 25 kt. Seas up to 5 ft. Slight chance of rain. Saturday: Low risk for Small Craft Advisory winds with gusts up to 25 kt. Seas up to 5 ft. Saturday Night: Winds less than 25 kt. Areas of seas approaching 5 ft. Sunday: Winds less than 25 kt. Seas locally approaching 5 ft. Slight chance of rain. Sunday Night: Moderate risk for Small Craft Advisory winds with gusts up to 30 kt. Areas of rough seas. Chance of rain. Monday: Low risk for gale force winds with gusts up to 35 kt. Rough seas up to 10 ft. Chance of rain. && .CLIMATE... Record Maximum Temps for Fri 2/10... Boston60/1990 Hartford55/1909 Providence58/1909 Worcester55/1909 && .BOX WATCHES/WARNINGS/ADVISORIES... CT...None. MA...None. RI...None. MARINE...Small Craft Advisory until 1 AM EST early this morning for ANZ250-254-255. && $$ SYNOPSIS...KJC/BW NEAR TERM...KJC/BW/KS SHORT TERM...BW LONG TERM...KJC AVIATION...KJC/BW/KS MARINE...KJC/BW CLIMATE...
Radar images courtesy Weather Underground / Intellicast.
UV Index forecast high for today: 2 Low
Current (Measured): 0.0 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:
0.00 in
Rain Today:
0.02 in
Wednesday:
0.02 in
February:
5.33 in
2023
12:00am
31.6°F
High today:
2:06am
29.5°F
Low today:
3:15pm
47.7°F
High Wednesday:
11:59pm
31.5°F
Low Wednesday:
2:06am
29.5°F
Low wind chill today:
5:57am
28.9°F
Low wind chill Wednesday:
12:00am
25.0°F
High dew pt today:
8:50am
35.8°F
High dew pt Wednesday:
None
Wind gust today:
3:21pm
11 mph
Wind gust Wednesday:
No alerts/warnings active for Southeast Middlesex County.
No snow expected in Lexington.
First Light:
6:20am
Sunrise:
6:49am
Sunset:
5:09pm
Twilight ends:
5:38pm
Daylight length:
10 hours 20 minutes
Phase:
Waning Gibbous (89%)
Moon set:
8:46am
Moon rise:
9:06pm