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Saturday, January 4, 2025

January 4, 2025

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA SATURDAY, JANUARY 4, 2025 ALL TIMES ARE…

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

SATURDAY, JANUARY 4, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0713E
SUNSET:  1625E

MIX OF SUN AND CLOUDS, REMAINING BREEZY….

Aside from being a bit colder, today’s weather is similar to
yesterday’s, as the synoptic pattern remains largely unchanged.
Skies have featured a mix of sunshine and clouds. Virga in the
distance to our E-SE at the 10am observation suggests some flurries
could have been flying out that way for a brief time this morning.

Temperatures are on the cold side and have been slow to rise, thanks to
cold advection with the west-northwest flow. We began the morning in the
low 20s, and have only made it to the upper 20s by the early afternoon.
The dew point has fallen a touch and is now in the low teens.

Winds slowed overnight, but began picking up again after sunrise. In
recent hours, winds have been frequently gusting 25-30mph. The average
speed for the day is 15mph. Our peak gust occurred just before 12:30pm
at 37mph.

Visibility has been decent, with views extending 50-70 miles.

The maximum temperature for today is 29F degrees, which is 7 degrees
below the normal high of 36F. The minimum temperature since midnight
is 22F degrees, which is 2 degrees above the normal low of 20F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Scattered stratocumulus, scattered altostratus/altocumulus
Temperature: 23F; Dew Point: 14F; Relative Humidity: 68%
Wind: WNW @ 7G13 kts
Sea-level pressure: 1005.1 mb; 29.68 in. Hg: rising unsteadily
Visibility: 50 miles
6-hr Max temp: 25F
6-hr Min temp: 22F
24-hr Precip:  0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 40 SCT 120 SCT 50 051/23/14/2907G13/968/ 8/570 52017
10025 20022

10 A.M.
Weather: Scattered stratocumulus, scattered altostratus/altocumulus,
broken cirrus, virga distant E-SE
Temperature: 26F; Dew Point: 13F; Relative Humidity: 57%
Wind: WNW @ 13G20 kts, peak wind WNW 33mph @ 9:08am
Sea-level pressure: 1006.2 mb; 29.71 in. Hg: rising unsteadily
Visibility: 60 miles
3-hr Precip:  0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 36 SCT 100 SCT E250 BKN 60 062/26/13/2913G20/971/
VIRGA DSNT E-SE PK WND 2929/08/ 8/571 52011

1 P.M.
Weather: Scattered stratocumulus, scattered altocumulus/altostratus,
scattered cirrus
Temperature: 29F; Dew Point: 13F; Relative Humidity: 50%
Wind: WNW @ 16G23 kts, peak wind WNW 37mph at 12:25pm
Sea-level pressure: 1004.7mb; 29.67 in. Hg: falling unsteadily
Visibility: 70 miles
6-hr Max temp: 29F
6-hr Min temp: 23F
6-hr Precip:  0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 42 SCT 100 SCT 250 SCT 70 047/29/13/3016G23/967/ PK WND 2932/25/
8/571 57015 10029 20023

————————————————————–

SUMMARY FOR FRIDAY, JANUARY 3, 2025

TEMPERATURE (DEGREES F)
MAX…….36  NORMAL…..36
MIN…….26  NORMAL…..20
MEAN……31  NORMAL…..28

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………….+3
TOTAL DEPARTURE FOR THE MONTH……………………+25 [+8.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………34  DEPARTURE……..-3
TOTAL HEATING UNITS FOR THE MONTH……………85  DEPARTURE…….-25
TOTAL HEATING UNITS FOR THE SEASON…………2017  DEPARTURE……-303
TOTAL HEATING UNITS LAST SEASON TO DATE…….1996  DEPARTURE…….+21

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)………..48 W    @   10:35 A.M.
VECTOR #1 (1-Sec)……….48 W    @   10:35 A.M.
VECTOR #2 (1-Sec)……….48 W    @   10:35 A.M.
DAVIS #1……………….49 W    @   10:35 A.M.
DAVIS #2 ………………47 WNW  @   10:35 A.M.
RMY #1 (Instantaneous)…..51 W    @   10:35 A.M.
RMY #2 (Instantaneous)…..50 WNW  @   11:18 A.M.
MERLIN…………………46 W
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………33 WNW  @   11:20 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..31      @   10:36 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..33      @   10:36 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………34 W    @   11:19 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………33 WNW  @   10:36 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..30 W    @   10:36 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..32 W    @   10:36 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..18.6 W  [447 total miles] VECTOR #1………………17.8
VECTOR #2………………18.0
DAVIS #1……………….19.0 W
DAVIS #2……………….18.1 WNW
RMY #1…………………16.8 W
RMY #2…………………17.6 W
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…………..0.55 DEPARTURE…..+0.09
TOTAL PRECIPITATION FOR THE YEAR (2025)……..0.55 DEPARTURE…..+0.09

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.5
TOTAL SNOWFALL FOR THE MONTH………………TRACE DEPARTURE……-1.6
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……12.6 DEPARTURE……-4.1

————————————————————–

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/…/..       44 W   VEC1 45 W   RMY 44
1/2    42/31/37/+9/0.00/T/…/..          60 W   VEC1 60 WNW RMY 63
1/3    36/26/31/+3/0.00/0.0/…/..        48 W   VEC1 48 W   RMY 51

1/4 The low since midnight is 22F, the daily normal low is 20F.

————————————————————–

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 4
HIGH 60F IN 2000
LOW -8F IN 1904, 1981
PRECIP 1.79 INS. IN 1982
SNOW 16.5 INS. IN 2018
PEAK GUST 84 MPH S IN 1982

RECORDS FOR JANUARY 5
HIGH 61F IN 2007
LOW -9F IN 1981
PRECIP 1.15 INS. IN 2019
SNOW 4.5 INS. IN 1891
PEAK GUST 70 MPH WNW IN 1959

TODAY’S REPORT PREPARED BY: Joshua Polen

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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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