Saturday, January 25, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SATURDAY, JANUARY 25, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0704E
SUNSET: 1650E
REMAINING COLD WITH MOSTLY CLEAR SKIES…
Skies have been mostly clear all day, with just a few stratocumulus,
altocumulus, and cirrus clouds around. Though it remains a bit colder
than normal for late January, the abundant sunshine with just a light
breeze makes it a decent day to get outdoors.
Temperatures held in the mid-teens through much of the overnight, only
briefly dipping down to a low of 11F just before sunrise. Since then,
the temperature has risen nicely into the upper 20s. The dew point has
increased slightly as well, rising from the high single digits to the
mid teens.
The wind began rather light out of the west-northwest, picked up a touch
late morning, and has gone lighter again by the afternoon, now out of the
west. Our average speed is about 10mph. The peak gust to this point occurred
just after 11:30am with a speed of around 26mph.
Visibility remains constrained by haziness, with views stuck in the 30-50
mile range throughout the day.
The maximum temperature for today is 29F degrees, which is 5 degrees
below the normal high of 34F. The minimum temperature since midnight
is 11F degrees, which is 6 degrees below the normal low of 17F.
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Today’s Observations:
7 A.M.
Weather: Clear, few stratocumulus distant NNE-SE,
few altocumulus all quadrants
Temperature: 14F; Dew Point: 9F; Relative Humidity: 81%
Wind: WNW @ 8G14 kts
Sea-level pressure: 1025.9 mb; 30.29 in. Hg: rising unsteadily
Visibility: 30 miles, hazy
6-hr Max temp: 17F
6-hr Min temp: 11F
24-hr Precip: 0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 3 inches
BHO SA 1155 CLR 30 259/14/9/2908G14/029/ FEW SC DSNT NNE-SE FEW AC ALQDS
HAZY/ 8/550 4/003 52015 10017 20011
10 A.M.
Weather: Clear, few stratocumulus distant NE-SE,
few altocumulus distant SE-W
Temperature: 22F; Dew Point: 14F; Relative Humidity: 70%
Wind: W @ 5 kts, wind light
Sea-level pressure: 1026.8 mb; 30.32 in. Hg: rising, then more slowly
Visibility: 40 miles, hazy
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 CLR 40 268/22/14/2705/032/ FEW SC DSNT NE-SE FEW AC DSNT SE-W
HAZY WND LGT/ 8/550 51009
1 P.M.
Weather: Scattered stratocumulus, scattered cirrus
Temperature: 28F; Dew Point: 13F; Relative Humidity: 52%
Wind: W @ 8G16 kts
Sea-level pressure: 1023.5 mb; 30.22 in. Hg: falling, then more rapidly
Visibility: 50 miles
6-hr Max temp: 29F
6-hr Min temp: 14F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 3 inches
BHO SA 1755 40 SCT 250 SCT 50 235/28/13/2608G16/022/ 8/501 4/003 58033
10029 20014
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SUMMARY FOR FRIDAY, JANUARY 24, 2025
TEMPERATURE (DEGREES F)
MAX…….32 NORMAL…..34
MIN…….14 NORMAL…..17
MEAN……23 NORMAL…..26
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..-3
TOTAL DEPARTURE FOR THE MONTH…………………….-34 [-1.6 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………42 DEPARTURE……..+3
TOTAL HEATING UNITS FOR THE MONTH…………..951 DEPARTURE…….+32
TOTAL HEATING UNITS FOR THE SEASON…………2883 DEPARTURE……-246
TOTAL HEATING UNITS LAST SEASON TO DATE…….2747 DEPARTURE……+136
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)………..21 W @ 02:20 P.M.
VECTOR #1 (1-Sec)……….22 WNW @ 02:19 P.M.
VECTOR #2 (1-Sec)……….24 WNW @ 03:47 P.M.
DAVIS #1……………….22 W @ 02:22 P.M.
DAVIS #2 ………………22 W @ 02:20 P.M.
RMY #1 (Instantaneous)…..22 W @ 02:20 P.M.
RMY #2 (Instantaneous)…..24 WNW @ 03:50 P.M.
MERLIN…………………20 W
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………17 WNW @ 12:30 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..17 @ 02:21 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..18 @ 02:21 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………17 W @ 02:21 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………17 WNW @ 02:20 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..16 W @ 02:21 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..17 W @ 02:21 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..10.3 WNW [246 total miles]
VECTOR #1………………10.4
VECTOR #2………………11.4
DAVIS #1……………….10.9 WNW
DAVIS #2……………….11.1 NW
RMY #1………………….9.9 WNW
RMY #2…………………11.1 WNW
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…..-2.01
TOTAL PRECIPITATION FOR THE YEAR (2025)……..1.52 DEPARTURE…..-2.01
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.6
TOTAL SNOWFALL FOR THE MONTH………………..7.4 DEPARTURE……-6.5
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……20.0 DEPARTURE……-9.0
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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 The low since midnight is 11F, 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 25
HIGH 56F IN 2010
LOW -9F IN 1935
PRECIP 2.24 INS. IN 1979
SNOWFALL 12.5 INS. IN 1941
PEAK GUST 81 MPH WNW IN 1972
RECORDS FOR JANUARY 26
HIGH 68F IN 1950 [RECORD HIGH TIE FOR MONTH]
LOW -5F IN 1920
PRECIP 1.60 INS. IN 1958
SNOW 9.0 INS. IN 1898
WIND 90e MPH SE IN 1978
TODAY’S REPORT PREPARED BY: Joshua Polen
