Old Res Weather

Current Conditions [‒] Current Conditions [+]

35.1°F Colder than last hour.

1.7°C

Cold

Clear

Tonight: Lo 55 °F

Monday: Hi 79 °F

Dew Point: 32.4°F Decreased 0.1°F since last hour.

Humidity: 90%

UV Index: 0.0 None

Barometer: 29.00 in Falling 0.05 inHg/hr

982 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.01 in

Rain Sunday: 0.00 in

Visibility: 10 miles

Wind:

Now: Calm

Avg: Calm

Gusts: 0 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

NWS Weather Forecast -
Tonight, Monday, & Monday Night through Sunday

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Sun May 17, 2026 4:34pm EDT

Overview:

- An isolated shower or thunderstorm possible this afternoon

- Warm/dry weather continues tonight through tomorrow night

- Above normal heat Tuesday. Isolated strong thunderstorms possible for interior Tuesday afternoon. Better chance for scattered strong to severe storms Wednesday.

- Cooler, more seasonable temperatures late in the week.

Tonight:

Partly Cloudy

Lo 55 °F

Partly cloudy, with a low around 55. North wind 3 to 10 mph. Chance of precipitation is 20%.

Monday:

Sunny

Hi 79 °F

Sunny, with a high near 79. East wind 3 to 9 mph.

Monday Night:

Mostly Clear

Lo 62 °F

Mostly clear, with a low around 62. South wind around 9 mph. New rainfall amounts less than a tenth of an inch possible.

Tuesday:

Mostly Sunny then Slight Chance Showers And T-Storms

Hi 91 °F

Tuesday: Mostly Sunny then Slight Chance Showers And Thunderstorms

A slight chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 91. Southwest wind 7 to 12 mph, with gusts as high as 23 mph.

Tuesday Night:

Slight Chance Showers And T-Storms then Partly Cloudy

Lo 69 °F

Tuesday Night: Slight Chance Showers And Thunderstorms then Partly Cloudy

A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 69. Southwest wind around 12 mph, with gusts as high as 22 mph.

Wednesday:

Mostly Sunny then Showers And T-Storms Likely

Hi 88 °F

Wednesday: Mostly Sunny then Showers And Thunderstorms Likely

Showers and thunderstorms likely after 2pm. Mostly sunny, with a high near 88. West wind 8 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.

Wednesday Night:

Showers And T-Storms Likely then Mostly Cloudy

Lo 53 °F

Wednesday Night: Showers And Thunderstorms Likely then Mostly Cloudy

Showers and thunderstorms likely before 11pm. Mostly cloudy, with a low around 53. Northwest wind 8 to 12 mph. Chance of precipitation is 60%.

Thursday:

Mostly Sunny

Hi 68 °F

Mostly sunny, with a high near 68. Northwest wind around 9 mph.

Thursday Night:

Partly Cloudy

Lo 48 °F

Partly cloudy, with a low around 48. North wind 2 to 7 mph.

Friday:

Mostly Sunny

Hi 66 °F

Mostly sunny, with a high near 66. East wind 2 to 8 mph.

Friday Night:

Chance Rain Showers

Lo 48 °F

A chance of rain showers after 9pm. Mostly cloudy, with a low around 48. South wind 2 to 8 mph. Chance of precipitation is 30%.

Saturday:

Chance Rain Showers

Hi 65 °F

A chance of rain showers. Mostly cloudy, with a high near 65. Southeast wind 2 to 7 mph. Chance of precipitation is 30%.

Saturday Night:

Chance Rain Showers

Lo 49 °F

A chance of rain showers. Mostly cloudy, with a low around 49. Northeast wind 3 to 7 mph. Chance of precipitation is 50%.

Sunday:

Chance Rain Showers

Hi 66 °F

A chance of rain showers. Mostly cloudy, with a high near 66. Northeast wind 3 to 7 mph.

FULL FORECAST

NWS Hourly Forecast -
Today 12am through Tue 11am

Issued by:
National Weather Service Boston / Norton, MA
Updated Sun May 17, 2026 4:34pm EDT

12:00am

Partly Cloudy

64°F
Dew Pt 51°F
Wind from N

N 3 mph
Precip: 0%

1:00am

Partly Cloudy

63°F
Dew Pt 50°F
Wind from NE

NE 3 mph
Precip: 0%

2:00am

Partly Cloudy

61°F
Dew Pt 49°F
Wind from NE

NE 3 mph
Precip: 0%

3:00am

Mostly Clear

59°F
Dew Pt 48°F
Wind from NE

NE 3 mph
Precip: 0%

4:00am

Partly Cloudy

57°F
Dew Pt 47°F
Wind from NE

NE 3 mph
Precip: 0%

5:00am

Partly Cloudy

56°F
Dew Pt 47°F
Wind from NE

NE 3 mph
Precip: 0%

6:00am

Mostly Sunny

56°F
Dew Pt 46°F
Wind from E

E 3 mph
Precip: 1%

7:00am

Sunny

56°F
Dew Pt 46°F
Wind from E

E 3 mph
Precip: 1%

8:00am

Mostly Sunny

59°F
Dew Pt 45°F
Wind from E

E 5 mph
Precip: 2%

9:00am

Mostly Sunny

61°F
Dew Pt 45°F
Wind from E

E 6 mph
Precip: 2%

10:00am

Mostly Sunny

65°F
Dew Pt 44°F
Wind from E

E 7 mph
Precip: 2%

11:00am

Sunny

67°F
Dew Pt 44°F
Wind from E

E 7 mph
Precip: 2%

12:00pm

Sunny

69°F
Dew Pt 45°F
Wind from E

E 8 mph
Precip: 3%

1:00pm

Sunny

72°F
Dew Pt 46°F
Wind from SE

SE 8 mph
Precip: 4%

2:00pm

Sunny

74°F
Dew Pt 47°F
Wind from SE

SE 8 mph
Precip: 0%

3:00pm

Sunny

75°F
Dew Pt 48°F
Wind from SE

SE 8 mph
Precip: 0%

4:00pm

Sunny

76°F
Dew Pt 49°F
Wind from SE

SE 8 mph
Precip: 0%

5:00pm

Sunny

78°F
Dew Pt 50°F
Wind from SE

SE 9 mph
Precip: 0%

6:00pm

Clear

76°F
Dew Pt 52°F
Wind from S

S 9 mph
Precip: 0%

7:00pm

Clear

74°F
Dew Pt 52°F
Wind from S

S 8 mph
Precip: 0%

8:00pm

Clear

72°F
Dew Pt 53°F
Wind from S

S 7 mph
Precip: 2%

9:00pm

Clear

68°F
Dew Pt 54°F
Wind from S

S 7 mph
Precip: 5%

10:00pm

Mostly Clear

66°F
Dew Pt 54°F
Wind from S

S 7 mph
Precip: 1%

11:00pm

Mostly Clear

65°F
Dew Pt 54°F
Wind from S

S 7 mph
Precip: 5%

Tue
12:00am

Mostly Clear

65°F
Dew Pt 55°F
Wind from SW

SW 7 mph
Precip: 3%

Tue
1:00am

Partly Cloudy

65°F
Dew Pt 56°F
Wind from SW

SW 7 mph
Precip: 1%

Tue
2:00am

Partly Cloudy

65°F
Dew Pt 56°F
Wind from SW

SW 7 mph
Precip: 4%
Rain: 0.01 in

Tue
3:00am

Partly Cloudy

65°F
Dew Pt 56°F
Wind from SW

SW 7 mph
Precip: 7%

Tue
4:00am

Partly Cloudy

65°F
Dew Pt 56°F
Wind from SW

SW 7 mph
Precip: 9%

Tue
5:00am

Mostly Cloudy

65°F
Dew Pt 56°F
Wind from SW

SW 7 mph
Precip: 12%

Tue
6:00am

Mostly Sunny

66°F
Dew Pt 57°F
Wind from SW

SW 7 mph
Precip: 10%

Tue
7:00am

Partly Sunny

67°F
Dew Pt 57°F
Wind from SW

SW 7 mph
Precip: 8%

Tue
8:00am

Partly Sunny

70°F
Dew Pt 59°F
Wind from SW

SW 7 mph
Precip: 1%

Tue
9:00am

Mostly Sunny

75°F
Dew Pt 60°F
Wind from SW

SW 8 mph
Precip: 1%

Tue
10:00am

Mostly Sunny

79°F
Dew Pt 62°F
Wind from SW

SW 9 mph
Precip: 1%

Tue
11:00am

Sunny

84°F
Dew Pt 63°F
Heat Index: 85°F
Wind from SW

SW 9 mph
Precip: 1%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 180001
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
801 PM EDT Sun May 17 2026

.WHAT HAS CHANGED...
SPC has placed much of southern New England 
in a general risk for thunderstorms this afternoon. There is a low 
chance for a couple of stray showers or thunderstorms this 
afternoon, mainly across cenral and eastern MA. Otherwise, no 
changes beyond this afternoon's forecast.

&&

.KEY MESSAGES...

- An isolated shower or thunderstorm possible this afternoon

- Warm/dry weather continues tonight through tomorrow night

- Above normal heat Tuesday. Isolated strong thunderstorms possible 
for interior Tuesday afternoon. Better chance for scattered strong 
to severe storms Wednesday. 

- Cooler, more seasonable temperatures late in the week.

&&

.DISCUSSION...
KEY MESSAGE 1...An isolated shower or thunderstorm is possible this 
afternoon

Very subtle short-wave energy aloft and 1000+ J/kg of SBCAPE may be 
enough to support a couple of stray convective showers or 
thunderstorms this afternoon. Hi-Res model guidance began picking up 
on this solution with the 12Z model runs. The consensus is for some 
showers to develop over southern NH and progress southeast over 
northeastern MA this afternoon. Confidence in a shower or storm is 
still fairly low given a fairly strong cap in place and substantial 
height rises this afternoon. Nonetheless, we'll be keeping an eye on 
the radar for any isolated storms that may develop. Any 
thunderstorms that do develop would likely be sub-severe and limited 
to a brief downpour and some thunder and lightning. 

KEY MESSAGE 2...- Warm/dry weather continues tonight through 
tomorrow night

High pressure builds east of southern New England on Monday. This 
will support onshore flow for most of the region which will result 
in a fairly sharp temperature gradient between the interior 
locations and the coastal plain. A warmer than normal air mass will 
remain over the region with 925 hPa temps between 15 and 20C. This 
will supprt high temps in the low to mid 80s across the interior and 
low to mid 70s near the coast. Winds gradually shift from east to 
south throughout the day tomorrow. Dry conditions persist through 
Monday night.  

KEY MESSAGE 3...Well-above normal heat Tuesday. Isolated strong
thunderstorms possible for interior Tuesday afternoon. Better 
chance for scattered strong to severe storms Wednesday.


An anomalous upper level ridge builds over the region Tuesday with 
850mb temperatures 2-3 standard deviations above normal. 925mb 
temperatures 22-25C will likely support well above normal highs in 
the upper 80s and 90s. Areas along the south coast and Cape will 
stay in the 70s-80s from the cooler SW flow. There is still 
uncertainty in the potential for 90F+ and the coverage of this 
across inland southern New England. The GEFS has higher 
probabilities for 90+ while the ECMWF has leaned cooler. Regardless, 
the higher range of probabilities is highlighted across the valleys, 
especially the CT Valley. This is where we could see the potential 
for 90-95 degree readings on Tuesday. Dewpoints 60-64F may add some 
humidity to the air; however, won't nudge the heat index (feels 
like) temperatures up more than a few degrees. It will be a hot day, 
especially in the valleys. This is our first heat of the season, so 
be sure to use caution and hydrate/cool accordingly.

The heat and increased humidity levels will build in moderate 
instability Tuesday with CAPE 1000-2000 J/kg. However, the forcing 
is lacking. Shear is also on the limited side. While this is not 
generally supportive of widespread severe thunderstorms, can't rule 
out some isolated storms in the afternoon with a few stronger storms 
possible. Model soundings show a classic inverted-V profile, 
typically pointing to a threat for strong winds/downdrafts. 

The greater thunderstorm risk looks to be Wednesday with the arrival 
of a cold front. This will bring in stronger shear values to support 
more organized thunderstorms, with potential to be strong to severe. 
Something to keep an eye on. There is a better signal for moisture 
as well which will support heavy downpours in any storms. For now, 
we see a good shot at scattered showers and thunderstorms with the 
risk for some being strong to severe. 


KEY MESSAGE 4...Cooler, more seasonable temperatures late week.

A cold front will swing through by Thursday bringing in a cooler 
airmass. This will bring in more seasonable/seasonably cool 
temperatures late-week with mainly dry conditions and northerly 
component flow.

&&

.AVIATION /00Z MONDAY THROUGH FRIDAY/...
Forecaster Confidence Levels...

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

00Z TAF Update:


Tonight and Monday...High confidence in TAF 

VFR. Winds becoming easterly overnight less than 10 kts. For
Monday, ESE winds becoming SE/SSE in the afternoon 8-12 kts.
Occasional gust up to 18 kts possible. 

Monday Night...High confidence in TAF. 
 
VFR. Winds shift S early evening becoming SW Monday night into 
Tuesday. Potential for BR again at ACK developing Monday
evening. 

KBOS...Moderate to High confidence in TAF. 

Boundary arrives from south to BOS 02-03Z. If WNW winds stay on
the lighter side (10 kts or less), we may see a brief shift to
a southerly component wind (S/SSE). Winds should shift to
NW/northerly by 06Z then shifting over to easterly early Monday
morning. 

KBDL...High confidence in TAF.

Outlook /Tuesday through Friday/...

Tuesday through Tuesday Night: VFR. Breezy. 

Wednesday: VFR. Breezy. Chance SHRA, slight chance TSRA.

Wednesday Night: VFR. Breezy. Chance SHRA.

Thursday through Thursday Night: VFR. 

Friday: VFR. Slight chance SHRA.

&&

.MARINE...
Forecaster Confidence Levels...

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

Tonight through Tomorrow Night

High pressure moves east over the coastal waters tonight through 
tomorrow bringing relatively calm conditions to the coastal waters. 
Generally expect seas with significant wave heights 3 feet or less 
and modest wind speeds around 10 knots with some gusts to 15 knots 
possible. Winds shift from west/northwest to easterly overnight with 
a gradual shift to the south as the day progresses tomorrow.

Outlook /Tuesday through Friday/...

Tuesday: Moderate risk for Small Craft Advisory winds with
gusts up to 30 kt. Areas of seas approaching 5 ft. 

Tuesday Night: Moderate risk for Small Craft Advisory winds
with gusts up to 30 kt. Local rough seas. 

Wednesday: Moderate risk for Small Craft Advisory winds with
gusts up to 25 kt. Local rough seas. Chance of rain showers. 

Wednesday Night: Winds less than 25 kt. Areas of seas
approaching 5 ft. Chance of rain showers, slight chance of
thunderstorms. 

Thursday: Winds less than 25 kt. Seas locally approaching 5 ft.

Thursday Night: Winds less than 25 kt. 

Friday: Winds less than 25 kt. Slight chance of rain showers. 

&&

.CLIMATE...
Record Highs for Tue May 19...

BOS 90/1949
BDL 94/1962
PVD 91/2017
ORH 92/1962

Record Highs for Wed May 20...

BOS 91/1996
BDL 99/1996
PVD 95/1996
ORH 91/1903

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...None.

&&

$$

DISCUSSION...Mensch/RM
AVIATION...Mensch/RM
MARINE...KJC/Mensch/RM
CLIMATE...

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