Tuesday, January 7, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
TUESDAY, JANUARY 7, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0713E
SUNSET: 1628E
BLUSTERY AND COLD WITH A MIX OF SUN AND CLOUDS….
Skies started the day on the clear side, however low and mid level
clouds started rotating down from the north and northwest by the mid
morning hours, becoming fairly dominant early this afternoon. There
has also been virga observed at various times during the day, but
some very light snow shower activity has finally reached the area
just prior to the 1pm observation.
Temperatures are cold, even for January standards as readings are
below normal for the date. We started the day in the low teens, and
have only recovered to the low to mid 20s by early this afternoon.
The dew point was holding in the mid single digits most of the day,
but has risen to near 10F early this afternoon due to the snow shower
activity.
Winds are quite gusty today mainly out of the northwest. The average
speed for the day so far is around 18mph. Frequent gusts over 30mph
have been observed today, with a peak gust so far of 43mph occurring
at 11:30am.
Visibility has been decent today with the view generally between
40-60 miles today, except where it’s reduced early this afternoon
due to snow showers.
The maximum temperature for today is 23F degrees, which is 12 degrees
below the normal high of 35F. The minimum temperature since midnight
is 11F degrees, which is 8 degrees below the normal low of 19F.
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Today’s Observations:
7 A.M.
Weather: Clear, few stratocumulus offshore distant NNE-SE-SSW,
few altocumulus distant all quadrants
Temperature: 13F; Dew Point: 6F; Relative Humidity: 73%
Wind: WNW @ 15G24 kts, peak wind NW 30mph at 6:34 A.M.
Sea-level pressure: 1000.8 mb; 29.55 in. Hg: rising, then steady
Visibility: 40 miles
6-hr Max temp: 13F
6-hr Min temp: 11F
24-hr Precip: 0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 CLR 40 008/13/6/3015G24/955/ FEW SC OFFSHR DSNT NNE-SE-SSW
FEW AC DSNT ALQDS PK WND 3126/34/ 8/550 51004 10013 20011
10 A.M.
Weather: Scattered stratocumulus, broken altocumulus/altostratus,
broken cirrostratus, virga all quadrants
Temperature: 19F; Dew Point: 6F; Relative Humidity: 58%
Wind: NW @ 23G34 kts, peak wind NW 39mph at 9:46 A.M.
Sea-level pressure: 1001.6 mb; 29.58 in. Hg: rising, then more slowly
Visibility: 50 miles
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 35 SCT E95 BKN E200 BKN 50 016/19/6/3223G34/958/ VIRGA ALQDS
PK WND 3234/46/ 8/576 51008
1 P.M.
Weather: Broken stratocumulus, broken altocumulus, very light snow shower
Temperature: 21F; Dew Point: 9F; Relative Humidity: 60%
Wind: WNW @ 19G32 kts, peak wind NW 41 mph at 12:39 P.M.
Sea-level pressure: 1000.5mb; 29.54 in. Hg: falling, then more slowly
Visibility: 50 miles, 20 miles W-NW
6-hr Max temp: 23F
6-hr Min temp: 13F
6-hr Precip: Trace
6-hr Snowfall: Trace
Snow Depth: 0 inches
BHO SA 1755 E35 BKN 75 BKN 50SW- 005/21/9/3019G32/954/ PCPN VRY LGT
SW-B47 VSBY 20 W-NW PK WND 3136/39/ TOTAL NEW SNW PST 6 HRS TRACE/
8/550 56011 6000/ 10023 20013
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SUMMARY FOR MONDAY, JANUARY 6, 2025
TEMPERATURE (DEGREES F)
MAX…….23 NORMAL…..35
MIN…….15 NORMAL…..20
MEAN……19 NORMAL…..28
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………….-9
TOTAL DEPARTURE FOR THE MONTH……………………+11 [+1.6 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………46 DEPARTURE……..+8
TOTAL HEATING UNITS FOR THE MONTH…………..210 DEPARTURE…….-12
TOTAL HEATING UNITS FOR THE SEASON…………2142 DEPARTURE……-290
TOTAL HEATING UNITS LAST SEASON TO DATE…….2105 DEPARTURE…….+37
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)………..31 NNW @ 07:47 P.M.
VECTOR #1 (1-Sec)……….31 NNW @ 07:47 P.M.
VECTOR #2 (1-Sec)……….31 NW @ 08:07 P.M.
DAVIS #1……………….30 NNW @ 07:48 P.M.
DAVIS #2 ………………28 NNW @ 08:07 P.M.
RMY #1 (Instantaneous)…..31 NNW @ 07:47 P.M.
RMY #2 (Instantaneous)…..32 NNW @ 08:10 P.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………22 NNW @ 07:48 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..22 @ 07:49 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..22 @ 07:43 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………22 NNW @ 07:49 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………21 N @ 07:43 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..21 NNW @ 07:49 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..22 NNW @ 07:43 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..12.0 WNW [289 total miles]
VECTOR #1………………12.0
VECTOR #2………………13.0
DAVIS #1……………….12.5 NW
DAVIS #2……………….12.6 NW
RMY #1…………………11.7 NW
RMY #2…………………12.7 WNW
RICHARDS (C5C)…………..OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.16
TOTAL PRECIPITATION FOR THE MONTH…………..0.55 DEPARTURE…..-0.37
TOTAL PRECIPITATION FOR THE YEAR (2025)……..0.55 DEPARTURE…..-0.37
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……-3.2
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……12.6 DEPARTURE……-5.7
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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 32/18/25/-3/0.00/0.0/…/.. 39 WNW VEC1 39 WNW RMY 40
1/6 23/15/19/-9/0.00/0.0/…/.. 31 NNW VEC1 31 NNW RMY 31
1/7 The low since midnight is 11F, the daily normal low is 19F.
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JANUARY DAILY RECORDS TO DATE
NONE.
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DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR JANUARY 7
HIGH 60F IN 1930
LOW -8F IN 2018
PRECIP 1.97 INS. IN 1977
SNOWFALL 16.0 INS. IN 1977
PEAK GUST 74 MPH NW IN 1968
RECORDS FOR JANUARY 8
HIGH 65F IN 2008
LOW -8F IN 1968
PRECIP 1.70 INS. IN 1958, 1979
SNOWFALL 12.5 INS. IN 1996
PEAK GUST 77 MPH NNW IN 1958
TODAY’S REPORT PREPARED BY: Matt Douglas
