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Monday, January 13, 2025

January 13, 2025

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA MONDAY, JANUARY 13, 2025 ALL TIMES ARE…

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

MONDAY, JANUARY 13, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0711E
SUNSET:  1635E

SOME SUNSHINE THIS MORNING, BUT CLOUDS RAPIDLY INCREASING TODAY….

We started the day with some cloud cover, which then moved out and
allowed for a few hours of decent sunshine. However, clouds quickly
overtook the sky again during the late morning hours and have stuck
with us since. These clouds are associated with a cold front that
will push through the region overnight, bringing an end to the “mild”
temperatures we’ve experienced the last couple of days.

Temperatures are above normal today with the morning low only in the
mid 20s, and reading reaching the upper 30s by early this afternoon.
This has definitely been a nice reprieve from the very cold conditions
we have dealt with most of the month.

Winds are generally on the light side, but have at times picked up
a bit into the 10-15mph range. Overall, the average speed for the day
so far is around 8mph out of mainly a westerly, to at times south-
westerly direction. The peak gust so far for the day is 20mph, which
occurred just before 11am.

Visibility has been limited due to haziness. The view has been
generally stuck around 30 miles.

The maximum temperature for today is 39F degrees, which is 4 degrees
above the normal high of 35F. The minimum temperature since midnight
is 26F degrees, which is 8 degrees above the normal low of 18F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Scattered altocumulus
Temperature: 27F; Dew Point: 19F; Relative Humidity: 72%
Wind: WSW @ 8 kts
Sea-level pressure: 1015.4 mb; 29.99 in. Hg: rising unsteadily
Visibility: 30 miles, hazy
6-hr Max temp: 27F
6-hr Min temp: 26F
24-hr Precip:  0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 1 inch
BHO SA 1155 120 SCT 30 154/27/19/2408/999/ HAZY/ 8/050 4/001 52001
10027 20026

10 A.M.
Weather: Clear, few altocumulus distant SW-NW-NE-ESE
Temperature: 35F; Dew Point: 24F; Relative Humidity: 63%
Wind: SW @ 8 kts
Sea-level pressure: 1014.8 mb; 29.97 in. Hg: falling, then more rapidly
Visibility: 30 miles, hazy
3-hr Precip:  0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 CLR 30 148/35/24/2208/997/ FEW AC DSNT SW-NW-NE-ESE HAZY/
8/050 58006

1 P.M.
Weather: Overcast altocumulus
Temperature: 37F; Dew Point: 24F; Relative Humidity: 58%
Wind: WSW @ 7 kts
Sea-level pressure: 1011.4 mb; 29.87 in. Hg: falling, then more slowly
Visibility: 30 miles, hazy
6-hr Max temp: 39F
6-hr Min temp: 27F
6-hr Precip:  0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 1 inches
BHO SA 1755 E70 OVC 30 114/37/24/2407/987/ HAZY/ 8/05/ 4/001 56034
10039 20027

————————————————————–

SUMMARY FOR SUNDAY, JANUARY 12, 2025

TEMPERATURE (DEGREES F)
MAX…….36   NORMAL…..35
MIN…….19   NORMAL…..19
MEAN……28   NORMAL…..27

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+1
TOTAL DEPARTURE FOR THE MONTH……………………..-9 [-1.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………37  DEPARTURE……..-2
TOTAL HEATING UNITS FOR THE MONTH…………..458  DEPARTURE……..+7
TOTAL HEATING UNITS FOR THE SEASON…………2390  DEPARTURE……-271
TOTAL HEATING UNITS LAST SEASON TO DATE…….2283  DEPARTURE……+107

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)………..35 NNW  @   02:13 A.M.
VECTOR #1 (1-Sec)……….35 NNW  @   02:13 A.M.
VECTOR #2 (1-Sec)……….35 NW   @   02:13 A.M.
DAVIS #1……………….34 NW   @   02:13 A.M.
DAVIS #2 ………………32 NNW  @   02:13 A.M.
RMY #1 (Instantaneous)…..39 NNW  @   02:13 A.M.
RMY #2 (Instantaneous)…..37 NW   @   02:13 A.M.
MERLIN…………………29 NW
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………23 NNW  @   02:16 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..23      @   02:15 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..24      @   01:25 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………23 NW   @   02:15 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………23 NNW  @   01:25 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..23 NNW  @   02:15 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..23 NW   @   01:25 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..10.3 NW [248 total miles] VECTOR #1………………10.5
VECTOR #2………………11.0
DAVIS #1……………….10.7 NW
DAVIS #2……………….10.6 NNW
RMY #1…………………10.2 NW
RMY #2…………………10.7 NW
RICHARDS (C5C)…………..OTS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.15
TOTAL PRECIPITATION FOR THE MONTH…………..0.67 DEPARTURE…..-1.14
TOTAL PRECIPITATION FOR THE YEAR (2025)……..0.67 DEPARTURE…..-1.14

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.5
TOTAL SNOWFALL FOR THE MONTH………………..1.7 DEPARTURE……-4.9
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……14.3 DEPARTURE……-7.4

————————————————————–

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   36/19/28/+1/0.00/0.0/…/..        35 NNW VEC1 35 NNW RMY 39

1/13 The low since midnight is 26F, the daily normal low is 18F.

————————————————————–

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 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

RECORDS FOR JANUARY 14
HIGH 65F IN 1995
LOW -12F IN 1914
PRECIP 1.45 INS. IN 2008
SNOWFALL 10.3 INS. IN 2008
PEAK GUST 68 MPH WNW IN 1976, S IN 2005

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

Notice: By accessing, downloading, or using any Blue Hill Observatory data or services, you unconditionally accept and agree to be bound by this Policy in its entirety. If you do not agree, you may not access or use Observatory data.
Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
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