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Tuesday, November 11, 2025

November 11, 2025

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA TUESDAY, NOVEMBER 11, 2025 ALL TIMES ARE…

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BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

TUESDAY, NOVEMBER 11, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0630E
SUNSET:  1626E

A TASTE OF WINTER TODAY AS A DEEP TROUGH SWINGS THROUGH THE
EASTERN U.S….

The slow moving cold front from yesterday has pushed offshore,
but it’s still not too far away. Nonetheless, a much colder
air mass has rushed in behind it giving us a bonafide taste of
winter today. Skies are overcast, thanks to the strong trough
overhead generating lift. Even some flurries and snow showers
have been observed across the area, including here at Blue
Hill. With a very gusty westerly wind, wind chills are in the
upper teens and low 20s here on the summit. This is definitely
a great day for indoor activities with a nice cup of warm cocoa
or soup!

Temperatures are stuck in the low to mid 30s all day so far as
strong cold air advection continues. The high temperature so
far is 36F, which occurred at midnight and again just before
1pm. This is a solid 15+ degrees below expected readings for
the date. Dew point values have plummeted into the low 20s,
indicating that this air mass is of arctic origin!

As mentioned, Winds are on the busy side out of mainly the west.
The average speed for the day so far is around 16mph. Gusts are
frequently exceeding 30mph since about the mid morning hours.
The peak gust so far is 43mph, which occurred just after the
1pm observation

Visibility is excellent today, despite the clouds and outside
of snow showers. The view improved from around 60 miles early
this morning to around 70 miles by early this afternoon.

The maximum temperature so far today is 36F degrees, which is
16 degrees below the normal high of 52F. The minimum temperature
since midnight is 30F degrees, which is 5 degrees below the
normal low of 35F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Overcast stratocumulus, few breaks in overcast distant
all quadrants
Temperature: 31F; Dew Point: 23F; Relative Humidity: 73%
Wind: W @ 10G21 kts
Sea-level pressure: 1001.7 mb; 29.58 in. Hg: falling, then rising
Visibility: 60 miles
6-hr Max temp: 34F
6-hr Min temp: 30F
24-hr Precip: 0.42 inches
BHO SA 1155 E30 OVC 60 017/31/23/2710G21/958/ FEW BINOVC DSNT
ALQDS/ 8/5// 53001 70042 10034 20030

10 A.M.
Weather: Overcast stratocumulus, very light snow showers
Temperature: 32F; Dew Point: 21F; Relative Humidity: 61%
Wind: W @ 18G28 kts, peak wind W 32mph at 9:52 A.M.
Sea-level pressure: 1001.2 mb; 29.57 in. Hg: rising, then falling
Visibility: 70 miles
3-hr Precip: Trace
BHO SA 1455 E35 OVC 70SW- 012/32/21/2718G28/957/ SW-B48
PCPN VRY LGT PK WND 2728/52/ 8/5// 58005 6000/

1 P.M.
Weather: Broken stratocumulus, broken altocumulus, virga all
quadrants
Temperature: 36F Dew Point: 22F; Relative Humidity: 56%
Wind: WWN @ 19G29 kts, peak wind W 38mph at 12:01 P.M.
Sea-level pressure: 999.4 mb; 29.51 in. Hg: falling, then more slowly
Visibility: 70 miles
6-hr Max temp: 36F
6-hr Min temp: 31F
6-hr Precip: Trace
BHO SA 1755 E40 BKN 55 BKN 70 994/36/22/2919G29/951/ VIRGA ALQDS
PK WND 2833/01/ 8/560 56018 6000/ 10036 20031

————————————————————–

SUMMARY FOR MONDAY, NOVEMBER 10, 2025

TEMPERATURE (DEGREES F)
MAX…….54   NORMAL…..52
MIN…….36   NORMAL…..36
MEAN……45   NORMAL…..44

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+1
TOTAL DEPARTURE FOR THE MONTH………………………+15 [+1.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY…………….20  DEPARTURE……..-1
TOTAL HEATING UNITS FOR THE MONTH……………180  DEPARTURE…….-17
TOTAL HEATING UNITS FOR THE SEASON…………..591  DEPARTURE……-118
TOTAL HEATING UNITS LAST SEASON TO DATE………510  DEPARTURE…….+81

COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025)
TOTAL COOLING UNITS FOR YESTERDAY……………..0  DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH……………..0  DEPARTURE………0
TOTAL COOLING UNITS FOR THE SEASON…………..756  DEPARTURE…….+79
TOTAL COOLING UNITS LAST SEASON TO DATE………768  DEPARTURE…….-12

PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
F420C, Contacting, Merlin, and Richards are all on Main Tower.
E=Estimated *=Last of multiple occurrences

F420C (Official)………..32 W    @   11:27 P.M.
VECTOR #1 (1-Sec)……….31 W    @   09:49 P.M.
VECTOR #2 (1-Sec)……….32 W    @   09:32 P.M.
DAVIS #1……………….32 W    @   09:50 P.M.
DAVIS #2 ………………30 WNW  @   11:27 P.M.
RMY #1 (Instantaneous)…..31 W    @   09:49 P.M.
RMY #2 (Instantaneous)…..34 W    @   09:32 P.M.
MERLIN…………………31 W
RICHARDS (C5C) (Inst)……32 W    @   11:28 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………24 W    @   11:21 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..23 W    @   11:43 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..23 W    @   11:28 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………25 W    @   11:28 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………23 W    @   11:28 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..21 W    @   11:43 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..22 W    @   11:28 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………22 W    @   11:28 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………7.1 NE [170 total miles] VECTOR #1……………….8.5
VECTOR #2……………….8.9
DAVIS #1………………..8.6 NNW
DAVIS #2………………….M
RMY #1………………….8.4 N
RMY #2………………….8.7 N
RICHARDS (C5C)…………..8.8

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.42 DEPARTURE…..+0.28
TOTAL PRECIPITATION FOR THE MONTH…………..1.05 DEPARTURE…..-0.41
TOTAL PRECIPITATION FOR THE YEAR (2025)…….43.36 DEPARTURE…..-2.26

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE…..-0.1
TOTAL SNOWFALL FOR THE MONTH………………TRACE DEPARTURE…..-0.4
TOTAL SNOWFALL FOR THE SEASON (2025-2026)…..TRACE DEPARTURE…..-1.1

————————————————————–

PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN)/SUN(%)/PEAK GUST/VEC1/RMY GUST
PEAK GUST: F420C (Official)
VEC1: Vector #1 1-second gust
RMY:  R.M. Young #1 wind gust recording system (Instantaneous)
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M:    Missing data

11/1  56/38/47/+0/0.00/0.0/619/100       50 W   VEC1 50 W   RMY 50
11/2  53/33/43/-4/0.00/0.0/617/100       23 WNW VEC1 23 WNW RMY 24
11/3  54/42/48/+2/0.16/0.0/012/02        41 WNW VEC1 41 W   RMY 46
11/4  54/42/48/+2/0.00/0.0/605/99        52 NW  VEC1 52 NW  RMY 54
11/5  56/39/48/+2/0.06/0.0/104/17        50 W   VEC1 47 W   RMY 52
11/6  50/34/42/-3/0.02/T/473/78          48 WNW VEC1 48 WNW RMY 49
11/7  52/31/42/-3/0.04/0.0/448/74        43 SSW VEC1 42 SSW RMY 47
11/8  60/45/53/+8/0.18/0.0/307/51        32 WNW VEC1 33 WNW RMY 33
11/9  61/46/54/+10/0.15/0.0/…/..       33 ESE VEC1 34 ESE RMY 35
11/10 54/36/45/+1/0.44/0.0/…/..        32 W   VEC1 31 W   RMY 31

11/11 The low since midnight is 30F, the daily normal low is 35F.

————————————————————–

NOVEMBER DAILY RECORDS TO DATE

NONE.

————————————————————–

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)

RECORDS FOR NOVEMBER 11
HIGH 73 IN 2020
LOW 17 IN 1956
PRECIP 1.14 INCHES IN 1991
SNOWFALL 2.5 IN 1986
PEAK GUST 64 NW IN 1962

RECORDS FOR NOVEMBER 12
HIGH 74 IN 1909
LOW 18 IN 1926
PRECIP 3.39 INCHES IN 1947
SNOWFALL 8.1 INCHES IN 1987
PEAK GUST 79e MPH NW IN 1947

TODAY’S REPORT PREPARED BY: Matt Douglas

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Data Use & Privacy Policy

Please read the full Policy before accessing Observatory data · Effective January 1, 2025

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Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
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