Wednesday, January 29, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
WEDNESDAY, JANUARY 29, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0700E
SUNSET: 1655E
CLIPPER SYSTEM BRINGS LIGHT SNOW OVERNIGHT; INCREASING SUNSHINE AND
MILDER CONDITIONS TODAY…
A weak clipper system passed to the north of the area overnight into
early this morning bringing with it a period of light snow. 1.0″ of
snow was measured here on the summit, which melted down to 0.04″ of
liquid. It was a nice fluffy snow with a high 25:1 ratio!
Snow ended early this morning with clouds lingering through the late
morning hours before sunshine finally took over. All in all, it’s
turned into quite a nice day, albeit on the breezy side. A line of
rain and snow showers is approaching from the W-NW as observed at
the 1pm observation. These will likely reach the area shortly,
putting an end to the sunshine.
Temperatures have warmed nicely now that the sun has come out. Readings
have risen rapidly into the mid to upper 40s by early this afternoon,
making it the warmest day since the 19th when readings were also in the
mid 40s.
Winds aren’t nearly as strong as yesterday, but they are ramping up
early this afternoon from the lighter values of this morning. The
average speed for the day so far is around 14mph. The peak gust so far
is 39mph, which occurred at 12:21pm.
Visibility has improved somewhat this afternoon from the lower values
this morning. The view has reached 40 miles, after only being 20-30
miles most of the morning hours.
The maximum temperature for today is 47F degrees, which is 13 degrees
above the normal high of 34F. The minimum temperature since midnight
is 19F degrees, which is 2 degrees above the normal low of 17F.
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Today’s Observations:
7 A.M.
Weather: Broken altocumulus, broken cirrus
Temperature: 26F; Dew Point: 22F; Relative Humidity: 86%
Wind: SW @ 7 kts
Sea-level pressure: 995.6 mb; 29.40 in. Hg: falling, then more slowly
Visibility: 25 miles, thin fog
6-hr Max temp: 26F
6-hr Min temp: 19F
24-hr Precip: 0.04 inches
24-hr Snowfall: 1.0 inches
Snow Depth: 3 inches
BHO SA 1155 E95 BKN 250 BKN 25 956/26/22/2307/940/ THN F ALQDS
TOTAL NEW SNW PST 24 HRS 1.0 INS/ 8/051 4/003 56035 6003/ 70004
10026 20019
10 A.M.
Weather: Broken altocumulus, broken cirrus
Temperature: 35F; Dew Point: 27F; Relative Humidity: 71%
Wind: WSW @ 15G22 kts
Sea-level pressure: 994.7 mb; 29.37 in. Hg: falling, then more rapidly
Visibility: 30 miles, hazy
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 E100 BKN 250 BKN 30 947/35/27/2415G22/937/ HAZY/ 8/051 58009
1 P.M.
Weather: Scattered cumulus, scattered altocumulus/altostratus,
scattered cirrus, virga distant W-N
Temperature: 46F; Dew Point: 24F; Relative Humidity: 41%
Wind: W @ 18G29 kts, peak wind W 39mph at 12:21 P.M.
Sea-level pressure: 992.8 mb; 29.32 in. Hg: steady, then falling
Visibility: 40 miles, 30 miles W-NW
6-hr Max temp: 47F
6-hr Min temp: 24F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 2 inches
BHO SA 1755 45 SCT 85 SCT 250 SCT 40 928/46/24/2718G29/932/ VIRGA DSNT W-N
VSBY 30 W-NW PK WND 2634/21/ 8/271 4/002 58019 10047 20024
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SUMMARY FOR TUESDAY, JANUARY 28, 2025
TEMPERATURE (DEGREES F)
MAX…….36 NORMAL…..34
MIN…….22 NORMAL…..17
MEAN……29 NORMAL…..26
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+3
TOTAL DEPARTURE FOR THE MONTH…………………….-29 [-1.2 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………36 DEPARTURE……..-3
TOTAL HEATING UNITS FOR THE MONTH………….1102 DEPARTURE…….+26
TOTAL HEATING UNITS FOR THE SEASON…………3034 DEPARTURE……-252
TOTAL HEATING UNITS LAST SEASON TO DATE…….2857 DEPARTURE……+177
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)………..65 WNW @ 11:53 A.M.
VECTOR #1 (1-Sec)……….65 WNW @ 11:53 A.M.
VECTOR #2 (1-Sec)……….71 WNW @ 11:48 A.M.
DAVIS #1……………….65 WNW @ 11:53 A.M.
DAVIS #2 ………………69 WNW @ 11:48 A.M.
RMY #1 (Instantaneous)…..68 WNW @ 11:53 A.M.
RMY #2 (Instantaneous)…..80 WNW @ 11:48 A.M.
MERLIN…………………60 WNW
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………47 WNW @ 12:00 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..43 @ 11:54 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..50 @ 11:54 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………46 WNW @ 11:54 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………50 WNW @ 11:54 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..41 WNW @ 11:54 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..47 WNW @ 11:54 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..16.5 WSW [396 total miles]
VECTOR #1………………15.8
VECTOR #2………………16.7
DAVIS #1……………….16.4 W
DAVIS #2……………….16.6 W
RMY #1…………………15.1 W
RMY #2…………………16.3 WSW
RICHARDS (C5C)…………..OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.04 DEPARTURE…..-0.10
TOTAL PRECIPITATION FOR THE MONTH…………..1.56 DEPARTURE…..-2.53
TOTAL PRECIPITATION FOR THE YEAR (2025)……..1.56 DEPARTURE…..-2.53
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..1.0 DEPARTURE……+0.3
TOTAL SNOWFALL FOR THE MONTH………………..8.4 DEPARTURE……-8.2
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……21.0 DEPARTURE…..-10.7
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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/+13/0.55/0.0/000/00 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 38/22/30/+4/0.00/0.0/…/.. 38 SW VEC1 40 SW RMY 42
1/28 36/22/29/+3/T/T/…/.. 65 WNW VEC1 65 WNW RMY 68
1/29 The low since midnight is 19F, 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 29
HIGH 66F IN 2002
LOW -11F IN 1888
PRECIP 1.79 INS. IN 2022
SNOWFALL 21.7 INS. IN 2022
PEAK GUST 72 MPH NW IN 1973
RECORDS FOR JANUARY 30
HIGH 60F IN 1914
LOW -8F IN 1948
PRECIP 1.12 INS. IN 1925
SNOWFALL 6.5 INS. IN 1986
PEAK GUST 76 MPH WNW IN 1962
TODAY’S REPORT PREPARED BY: Matt Douglas
