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Sunday, January 5, 2025

January 5, 2025

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA SUNDAY, JANUARY 5, 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 5, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0713E
SUNSET:  1626E

CONTINUED BRISK AND COLD WITH MORE CLOUDS THAN SUN TODAY….

Clouds have pretty much dominated the sky today with some breaks
of sunshine from time to time. These clouds are largely associated
with Lake Effect snow bands coming off Lake Ontario, crossing
New York State, and then through central and southern New England.
The strong west-northwest flow of the past few days is helping to
carry the streamers of clouds, and at times even some flurries, all
the way to coastal Southern New England!

With the cloud cover and continued cold air advection, temperatures
have slowly made it to the low 30s early this afternoon from a
morning low in the low to mid 20s. Dew point readings have been
dropping from the mid to upper teens this morning to the low teens
early this afternoon, indicative of a polar air mass in place.

Winds continue to be gusty today (now the 4th day in a row) with
speeds averaging at around 15mph for the day so far. Gusts have been
reaching over 30mph since about the mid morning hours, with a peak
gust so far of 41mph occurring at 10:46am this morning.

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

The maximum temperature for today is 32F degrees, which is 4 degrees
below the normal high of 36F. The minimum temperature since midnight
is 23F degrees, which is 3 degrees above the normal low of 20F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Scattered stratocumulus, broken altocumulus/altostratus,
virga distant WSW-WNW
Temperature: 24F; Dew Point: 16F; Relative Humidity: 70%
Wind: W @ 13G19 kts
Sea-level pressure: 1010.5 mb; 29.84 in. Hg: rising, then more rapidly
Visibility: 50 miles
6-hr Max temp: 25F
6-hr Min temp: 23F
24-hr Precip:  0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 45 SCT E95 BKN 50 105/24/16/2813G19/984/ VIRGA DSNT
WSW-WNW/ 8/570 53010 10025 20023

10 A.M.
Weather: Scattered stratocumulus, broken altocumulus/altostratus,
broken cirrus, virga distant WSW-WNW and distant NW-NE
Temperature: 29F; Dew Point: 14F; Relative Humidity: 53%
Wind: WNW @ 16G25 kts, peak wind W 35mph at 9:42 A.M.
Sea-level pressure: 1010.8 mb; 29.85 in. Hg: rising, then falling
Visibility: 70 miles
3-hr Precip:  0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 45 SCT E95 BKN 250 BKN 70 108/29/14/2916G25/985/
VIRGA DSNT WSW-W AND DSNT NW-NE PK WND 2830/42/ 8/571 50003

1 P.M.
Weather: Overcast stratocumulus, few breaks in overcast distant ESE-SSW,
higher clouds visible distant ESE-SSW, virga all quadrants
Temperature: 30F; Dew Point: 12F; Relative Humidity: 46%
Wind: WNW @ 17G28 kts, peak wind W 35mph at 12:36 P.M.
Sea-level pressure: 1009.2mb; 29.80 in. Hg: falling, then more slowly
Visibility: 70 miles
6-hr Max temp: 32F
6-hr Min temp: 24F
6-hr Precip:  0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 E45 OVC 70 092/30/12/2917G28/980/ FEW BINOVC DSNT ESE-SSW
HIER CLDS VSBL DSNT ESE-SSW VIRGA ALQDS PK WND 2830/36/ 8/5// 56016
10032 20024

————————————————————–

SUMMARY FOR SATURDAY, JANUARY 4, 2025

TEMPERATURE (DEGREES F)
MAX…….29  NORMAL…..36
MIN…….22  NORMAL…..20
MEAN……26  NORMAL…..28

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………….-2
TOTAL DEPARTURE FOR THE MONTH……………………+23 [+5.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………39  DEPARTURE……..+2
TOTAL HEATING UNITS FOR THE MONTH…………..124  DEPARTURE…….-23
TOTAL HEATING UNITS FOR THE SEASON…………2056  DEPARTURE……-301
TOTAL HEATING UNITS LAST SEASON TO DATE…….2029  DEPARTURE…….+27

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)………..43 NW   @   01:50 P.M.
VECTOR #1 (1-Sec)……….43 NW   @   01:50 P.M.
VECTOR #2 (1-Sec)……….44 WNW  @   03:51 P.M.
DAVIS #1……………….43 WNW  @   01:50 P.M.
DAVIS #2 ………………41 WNW  @   03:52 P.M.
RMY #1 (Instantaneous)…..48 NW   @   01:50 P.M.
RMY #2 (Instantaneous)…..44 WNW  @   03:51 P.M.
MERLIN…………………43 NW
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………31 WNW  @   04:00 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..29      @   04:00 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..33      @   04:00 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………31 WNW  @   04:00 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………32 WNW  @   04:00 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..28 WNW  @   01:37 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..32 WNW  @   04:00 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..16.3 WNW [392 total miles] VECTOR #1………………15.7
VECTOR #2………………17.2
DAVIS #1……………….16.5 WNW
DAVIS #2……………….16.8 WNW
RMY #1…………………14.9 WNW
RMY #2…………………16.7 WNW
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…..-0.06
TOTAL PRECIPITATION FOR THE YEAR (2025)……..0.55 DEPARTURE…..-0.06

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.6
TOTAL SNOWFALL FOR THE MONTH………………TRACE DEPARTURE……-2.2
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……12.6 DEPARTURE……-4.7

————————————————————–

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/T/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    29/22/26/-2/0.00/0.0/…/..        43 NW  VEC1 43 NW  RMY 48

1/5 The low since midnight is 23F, 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 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

RECORDS FOR JANUARY 6
HIGH 66F IN 2007
LOW -14F IN 1896
PRECIP 3.10 INS. IN 1889 [RECORD FOR MONTH] SNOWFALL 5.2 INS. IN 2005
PEAK GUST 70 MPH WNW IN 1959

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

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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