Monday, January 27, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
MONDAY, JANUARY 27, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0703E
SUNSET: 1652E
PLENTY OF SUNSHINE TODAY WITH SLIGHTLY ABOVE NORMAL TEMPERATURES AND
AN EARTHQUAKE…
Skies have been mainly clear today, save for a few distant clouds early
this morning that have since dissipated or moved well out to sea. By
the 10am observation, not one cloud was observed anywhere in the sky,
yielding a rare perfectly clear for that observation! However, some
cirrus are showing up again well in the distance to the northwest
through north-northeast early this afternoon.
We also observed the earthquake that occurred around 10:22am this
morning. A 3.8 magnitude earthquake centered about 6 miles offshore
of York Harbor, Maine, was felt across many parts of New England. Here
on the summit of Blue Hill it manifested as a loud rumbling sound,
similar to what would be heard if an F-16 fighter jet flew by. Also,
the entire building vibrated with a rattling sound being heard coming
from the wind rack in the weather office. Due to the thickness of the
hill and it’s composition of mainly granite, shaking or swaying is not
a typical phenomenon here on the summit in an earthquake, unless it’s a
very strong one.
Temperatures have pushed into the mid 30s early this afternoon, which,
much like yesterday, is being accompanied by gusty winds. So while it’s
warmer than was all of last week, the wind is keeping the chill values
in the low to mid 20s. Plus the dew point has dropped back into the
low to mid teens, so the air mass is quite dry, adding to the chilly
feeling in the air.
Winds have become quite gusty again today. A mainly westerly wind has
been averaging around 13mph for the day so far. Gusts have been reaching
the 30mph mark, with a peak gust so far of 31mph occurring at 1:09pm.
Visibility is better today than it’s been in a couple of days, with
the view ranging from 40-60 miles today.
The maximum temperature for today is 37F degrees, which is 3 degrees
above the normal high of 34F. The minimum temperature since midnight
is 22F degrees, which is 5 degrees above the normal low of 17F.
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Today’s Observations:
7 A.M.
Weather: Clear, few stratocumulus distant NE-E, few altocumulus
distant NNE, few cirrostratus distant E-S-SW
Temperature: 22F; Dew Point: 13F; Relative Humidity: 67%
Wind: W @ 12G23 kts
Sea-level pressure: 1015.1 mb; 29.98 in. Hg: falling, then steady
Visibility: 40 miles, hazy
6-hr Max temp: 26F
6-hr Min temp: 22F
24-hr Precip: 0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 3 inches
BHO SA 1155 CLR 40 151/22/13/2812G23/998/ FEW SC DSNT NE-E FEW AC DSNT
NNE FEW CS DSNT E-S-SW HAZY/ 8/558 4/003 56008 10026 20022
10 A.M.
Weather: Clear
Temperature: 29F; Dew Point: 14F; Relative Humidity: 53%
Wind: W @ 14G24 kts
Sea-level pressure: 1014.2 mb; 29.95 in. Hg: falling steadily
Visibility: 50 miles
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 CLR 50 142/29/14/2714G24/995/ 8/000 57009
1 P.M.
Weather: Clear, few cirrus distant NW-NNE
Temperature: 37F; Dew Point: 16F; Relative Humidity: 42%
Wind: WSW @ 17G25 kts
Sea-level pressure: 1010.8 mb; 29.85 in. Hg: falling, then more rapidly
Visibility: 60 miles
6-hr Max temp: 37F
6-hr Min temp: 22F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 3 inches
BHO SA 1755 CLR 60 108/37/16/2417G25/985/ FEW CI DSNT NW-NNE/
8/001 4/003 58034 10037 20022
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SUMMARY FOR SUNDAY, JANUARY 26, 2025
TEMPERATURE (DEGREES F)
MAX…….39 NORMAL…..34
MIN…….21 NORMAL…..17
MEAN……30 NORMAL…..26
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+4
TOTAL DEPARTURE FOR THE MONTH…………………….-36 [-1.6 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………35 DEPARTURE……..-4
TOTAL HEATING UNITS FOR THE MONTH………….1031 DEPARTURE…….+33
TOTAL HEATING UNITS FOR THE SEASON…………2963 DEPARTURE……-245
TOTAL HEATING UNITS LAST SEASON TO DATE…….2795 DEPARTURE……+168
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 @ 01:07 P.M.
VECTOR #1 (1-Sec)……….48 W @ 01:07 P.M.
VECTOR #2 (1-Sec)……….48 WNW @ 11:57 A.M.
DAVIS #1……………….48 W @ 01:07 P.M.
DAVIS #2 ………………45 WNW @ 01:08 P.M.
RMY #1 (Instantaneous)…..50 W @ 01:07 P.M.
RMY #2 (Instantaneous)…..48 WNW @ 11:57 A.M.
MERLIN…………………46 W
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………34 WNW @ 12:09 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..32 @ 01:08 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..33 @ 01:08 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………34 W @ 01:08 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………33 WNW @ 01:08 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..30 W @ 01:08 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..32 W @ 01:08 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..16.3 W [391 total miles]
VECTOR #1………………15.9
VECTOR #2………………16.4
DAVIS #1……………….16.4 W
DAVIS #2……………….16.4 W
RMY #1…………………15.2 WSW
RMY #2…………………16.2 WSW
RICHARDS (C5C)…………..OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.14
TOTAL PRECIPITATION FOR THE MONTH…………..1.52 DEPARTURE…..-2.29
TOTAL PRECIPITATION FOR THE YEAR (2025)……..1.52 DEPARTURE…..-2.29
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.7
TOTAL SNOWFALL FOR THE MONTH………………..7.4 DEPARTURE……-7.8
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……20.0 DEPARTURE…..-10.3
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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/+13/0.55/0.0/000/00 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/223/40 46 NW VEC1 47 NW RMY 51
1/10 40/19/30/+3/0.00/0.0/560/100 39 NW VEC1 39 NW RMY 42
1/11 30/21/26/-1/0.12/1.7/000/00 25 NW VEC1 26 NW RMY 28
1/12 36/19/28/+1/0.00/0.0/556/99 35 NNW VEC1 35 NNW RMY 39
1/13 39/26/33/+7/0.00/0.0/192/34 26 WNW VEC1 27 WNW RMY 27
1/14 32/20/26/0/0.00/0.0/537/95 44 WNW VEC1 44 WNW RMY 45
1/15 29/16/23/-3/0.00/0.0/504/89 37 NW VEC1 37 NW RMY 38
1/16 30/13/22/-4/T/T/301/53 20 W VEC1 20 SSW RMY 20
1/17 35/16/26/0/T/T/410/72 20 S VEC1 20 SSW RMY 20
1/18 44/27/36/+10/0.26/0.0/046/08 36 S VEC1 37 S RMY 39
1/19 43/27/35/+9/0.51/4.6/276/48 26 N VEC1 28 NNW RMY 29
1/20 27/9/18/-8/0.08/1.1/460/80 32 NW VEC1 32 NW RMY 36
1/21 18/6/12/-14/0.00/0.0/173/30 21 W VEC1 21 WNW RMY 21
1/22 21/2/12/-14/0.00/0.0/545/94 20 NNW VEC1 20 NNW RMY 20
1/23 30/12/21/-5/0.00/0.0/…/.. 29 SW VEC1 29 SW RMY 30
1/24 32/14/23/-3/0.00/0.0/…/.. 21 W VEC1 22 WNW RMY 22
1/25 29/11/20/-6/0.00/0.0/…/.. 26 W VEC1 26 W RMY 27
1/26 39/21/30/+4/0.00/0.0/…/.. 48 W VEC1 48 W RMY 50
1/27 The low since midnight is 22F, the daily normal low is 17F.
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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 27
HIGH 63F IN 1974
LOW -12F IN 1924
PRECIP 1.94 INS. IN 2015
SNOWFALL 25.2 INS. IN 2015 [RECORD FOR MONTH]
PEAK GUST 91 MPH SSE IN 1996
RECORDS FOR JANUARY 28
HIGH 59F IN 1916
LOW -9F IN 1888, 1924
PRECIP 2.18 INS. IN 1897
SNOWFALL 15.0 INS. IN 1897
PEAK GUST 78e MPH SSE IN 1977
TODAY’S REPORT PREPARED BY: Matt Douglas
