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Sunday, January 12, 2025

January 12, 2025

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA SUNDAY, JANUARY 12, 2025 ALL TIMES ARE…

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

SUNDAY, JANUARY 12, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0712E
SUNSET:  1634E

SUNSHINE AND SEASONABLE TEMPERATURES TODAY FOLLOWING YESTERDAY’S LIGHT
SNOW EVENT….

The light snow event yesterday yielded a total of 1.7″ of snowfall and
a 0.12″ liquid equivalent. Despite this, both snowfall and precipitation
values continue to be below normal for the month so far.

Today is featuring mainly clear skies with only a few clouds of various
types, levels, and quadrants, mainly off in the distance. As such,
sunshine has been the theme today making for a pretty scene with the
snow cover on the ground.

Temperatures have “warmed” to the mid 30s by early this afternoon, which
is essentially normal for this time of year. After the cold spell of
last week, it does feel pretty nice out there today, especially in the
sun.

Winds have been fairly steady today out of the northwest and north-
northwest. The average speed so far for the day is around 13mph. The
peak gust occurred around 2:13am, during which time winds were going
through a gusty period. The peak value was 35mph.

Visibility has been decent today, generally holding in the 50-70 mile
range.

The maximum temperature for today is 35F degrees, which is equal to
the normal high of 35F. The minimum temperature since midnight is 19F
degrees, which is equal to the normal low of 19F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Clear, few stratocumulus offshore distant NE-SE-SSW,
few altocumulus distant WNW-NW and distant NNE-SE
Temperature: 20F; Dew Point: 16F; Relative Humidity: 82%
Wind: NNW @ 12 kts
Sea-level pressure: 1011.2 mb; 29.86 in. Hg: rising, then more slowly
Visibility: 50 miles
6-hr Max temp: 21F
6-hr Min temp: 19F
24-hr Precip:  0.11 inches
24-hr Snowfall: 1.6 inches
Snow Depth: 2 inches
BHO SA 1155 CLR 50 112/20/16/3312/986/ FEW SC OFFSHR DSNT NE-SE-SSW
FEW AC DSNT WNW-NW AND DSNT NNE-SE TOTAL NEW SNW PST 24 HRS 1.6 INS/
8/550 4/002 51029 70011 10021 20019

10 A.M.
Weather: Clear, few stratocumulus distant NE-S and distant WSW-NW,
few altocumulus distant NE-SE, few cirrus distant WSW-W
Temperature: 28F; Dew Point: 18F; Relative Humidity: 65%
Wind: NNW @ 9G17 kts
Sea-level pressure: 1013.8 mb; 29.94 in. Hg: rising, then more slowly
Visibility: 60 miles
3-hr Precip:  0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 CLR 60 138/28/18/3309G17/994/ FEW SC DSNT NE-S AND
DSNT WSW-NW FEW AC DSNT NE-SE FEW CI DSNT WSW-W/ 8/551 51026

1 P.M.
Weather: Clear, few stratocumulus all quadrants, few cirrus distant W-NW
Temperature: 34F; Dew Point: 21F; Relative Humidity: 59%
Wind: NW @ 7 kts
Sea-level pressure: 1013.9 mb; 29.94 in. Hg: rising, then falling
Visibility: 70 miles
6-hr Max temp: 35F
6-hr Min temp: 20F
6-hr Precip:  0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 2 inches
BHO SA 1755 CLR 70 139/34/21/3207/994/ FEW SC ALQDS FEW CI DSNT W-NW/
8/501 4/002 50001 10035 20020

————————————————————–

SUMMARY FOR SATURDAY, JANUARY 11, 2025

TEMPERATURE (DEGREES F)
MAX…….30   NORMAL…..35
MIN…….21   NORMAL…..19
MEAN……26   NORMAL…..27

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..-1
TOTAL DEPARTURE FOR THE MONTH……………………..-10 [-1.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………39  DEPARTURE……..+1
TOTAL HEATING UNITS FOR THE MONTH…………..421  DEPARTURE……..+9
TOTAL HEATING UNITS FOR THE SEASON…………2353  DEPARTURE……-269
TOTAL HEATING UNITS LAST SEASON TO DATE…….2258  DEPARTURE…….+95

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

F420C (Official)………..25 NW   @   11:47 P.M.
VECTOR #1 (1-Sec)……….26 NW   @   11:47 P.M.
VECTOR #2 (1-Sec)……….25 NW   @   11:47 P.M.
DAVIS #1……………….24 NW   @   11:47 P.M.
DAVIS #2 ………………21 N    @   08:00 P.M.
RMY #1 (Instantaneous)…..28 NW   @   11:47 P.M.
RMY #2 (Instantaneous)…..24 NW   @   11:47 P.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………16 NW   @   11:46 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..16      @   11:45 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..17      @   11:59 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………16 NW   @   11:45 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………16 NNW  @   11:59 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..16 NW   @   11:45 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..16 NW   @   11:59 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………7.5 NNW [179 total miles] VECTOR #1……………….8.1
VECTOR #2……………….8.4
DAVIS #1………………..7.7 NNW
DAVIS #2………………..7.6 N
RMY #1………………….8.0 N
RMY #2………………….8.3 N
RICHARDS (C5C)…………..OTS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.11 DEPARTURE…..-0.04
TOTAL PRECIPITATION FOR THE MONTH…………..0.67 DEPARTURE…..-0.99
TOTAL PRECIPITATION FOR THE YEAR (2025)……..0.67 DEPARTURE…..-0.99

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..1.6 DEPARTURE……+1.0
TOTAL SNOWFALL FOR THE MONTH………………..1.7 DEPARTURE……-4.4
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……14.3 DEPARTURE……-6.9

————————————————————–

PRELIMINARY CLIMATE SUMMARY FOR JANUARY 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

1/1    47/36/42/+13/0.55/0.0/000/00       44 W   VEC1 45 W   RMY 44
1/2    42/31/37/+9/T/T/534/97             60 W   VEC1 60 WNW RMY 63
1/3    36/26/31/+3/0.00/0.0/446/81        48 W   VEC1 48 W   RMY 51
1/4    29/22/26/-2/0.00/0.0/453/82        43 NW  VEC1 43 NW  RMY 48
1/5    32/18/25/-3/0.00/0.0/088/16        39 WNW VEC1 39 WNW RMY 40
1/6    23/15/19/-9/0.00/0.0/000/00        31 NNW VEC1 31 NNW RMY 31
1/7    24/11/18/-9/T/T/450/81             43 WNW VEC1 42 WNW RMY 47
1/8    27/14/21/-6/0.00/0.0/550/99        48 WNW VEC1 48 WNW RMY 52
1/9    25/13/19/-8/T/T/…/..             46 NW  VEC1 47 NW  RMY 51
1/10   40/19/30/+3/0.00/0.0/…/..        39 NW  VEC1 39 NW  RMY 42
1/11   30/21/26/-1/0.12/1.7/…/..        25 NW  VEC1 26 NW  RMY 28

1/12 The low since midnight is 19F, the daily normal low is 19F.

————————————————————–

JANUARY DAILY RECORDS TO DATE

NONE.

————————————————————–

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

RECORDS FOR JANUARY 12
HIGH 68F IN 2020 [RECORD HIGH TIE FOR MONTH] LOW -15F IN 1886
PRECIP 2.04 INS. IN 2011
SNOW 18.2 INS. IN 2011
WIND 84e MPH S IN 1980

RECORDS FOR JANUARY 13
HIGH 60F IN 2018
LOW -11F IN 1912
PRECIP 1.72 INS. IN 2024
SNOWFALL 12.6 INS. IN 1964
PEAK GUST 74 MPH NE IN 1964

TODAY’S REPORT PREPARED BY: Matt Douglas

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Blue Hill Observatory & Science Center · Legal

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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