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BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SUNDAY, FEBRUARY 2, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0656E
SUNSET: 1700E
HAPPY BELATED BIRTHDAY TO BLUE HILL YESTERDAY.. 140 YEARS (AND
COUNTING!) OF CONTINUOUS CLIMATE DATA…
Although we had mostly clear skies to start off the day, it was
downright frigid at daybreak with a temperature of 5F and a windchill
around -10F. Fortunately, we had some recovery back into the
“double digits”, though we were still well below normal for this time
of year.
As mentioned, temperatures have stayed well below seasonable today,
mostly due to dry arctic air. Dew point values started off in the
negatives and just reached double digits by noontime today.
Winds continued to blow from the NNW and N for much of the morning
averaging around 10mph. During the late morning, we had calm wind
conditions and a wind shift to the E and ESE directions and with that
came lighter winds, averaging around 5mph. The average speed for the
day so far is around 8mph with the peak gust occurring just after
midnight at 23mph.
Despite the dry air, visibility has been rather subpar. We have remained
in the 40 mile range due to hazy conditions.
The maximum temperature for today is 22F degrees, which is 13 degrees
below the normal high of 35F. The minimum temperature since midnight
is 5F degrees, which is 13 degrees below the normal low of 18F.
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PRELIMINARY STATS FOR JANUARY 2025
TEMPERATURE, Deg. F
Avg. Max. 33.1 [-1.6]
Avg. Min. 18.3 [ 0.0]
Mean 25.7 [-0.8]
24-hour corrected mean: 25.5
Max. for month: 47F on the 1st
Min. for month: 2F on the 22nd
HEATING DEGREE DAYS
Total heating units: 1211 [+018]
Total for the season: 3143 [-260]
Total for last season: 2966
COOLING DEGREE DAYS
Total cooling units: 0 [ 000]
Total for the season: 0 [ 000]
Total for last season: 0
PRECIPITATION, Inches
Total: 2.35 [-2.15]
Greatest in 24 hrs: 0.79 on the 31st
SNOWFALL, Inches
Total: 8.4 [-10.2]
Greatest in 24 hrs: 5.7 on the 19th-20th
WIND, mph
Avg. uncorrected wind speed: 13.9 mph
Avg. corrected wind speed: 14.2 mph
Prevailing wind direction: West-Northwest [30%]
Peak gust and direction: 65 WNW on the 28th
SUNSHINE:
Campbell-Stokes card minutes: 10764 of a possible 17130, or 63%
Astronomical total minutes: 11110 of a possible 17686 or 63%
————————————————————–
Today’s Observations:
7 A.M.
Weather: Clear, few stratocumulus N and distant NNE-E-SSE,
few cirrus all quadrants
Temperature: 5F; Dew Point: -2F; Relative Humidity: 71%
Wind: N @ 7 kts
Sea-level pressure: 1036.7 mb; 30.61 in. Hg: rising, then falling
Visibility: 40 miles
6-hr Max temp: 9F
6-hr Min temp: 5F
24-hr Precip: 0.07 inches
24-hr Snowfall: 0.3 inches
Snow Depth: Trace
BHO SA 1155 CLR 40 367/5/—2/3607/061/ FEW SC N AND DSNT NNE-E-SSE
FEW CI ALQDS NEW SNW PST 24 HRS 0.3 IN/ 8/501 4/000 50016 10009 20005
10 A.M.
Weather: Thinly broken cirrus, few stratocumulus N-NE and distant
NNE-E-ESE
Temperature: 19F; Dew Point: 17F; Relative Humidity: 65%
Wind: Calm
Sea-level pressure: 1037.9 mb; 30.65 in. Hg: rising, then falling
Visibility: 40 miles, hazy
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 E250 -BKN 40 379/19/17/0000/065/ FEW SC N-NE AND
DSNT NNE-E-ESE HAZY WND CALM/ 8/504 50012
1 P.M.
Weather: Overcast cirrostratus, scattered stratocumulus, scattered
altocumulus
Temperature: 22F; Dew Point: 16F; Relative Humidity: 76%
Wind: SE @ 3 kts, wind light
Sea-level pressure: 1035.0 mb; 30.56 in. Hg: falling, then more rapidly
Visibility: 40 miles, hazy
6-hr Max temp: 22F
6-hr Min temp: 5F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: Trace
BHO SA 1755 20 SCT 150 SCT E220 OVC 40 350/22/16/1303/056/ HAZY
WND LGT/ 8/557 4/000 58029 10022 20005
————————————————————–
SUMMARY FOR SATURDAY, FEBRUARY 1, 2025
TEMPERATURE (DEGREES F)
MAX…….32 NORMAL…..35
MIN…….10 NORMAL…..17
MEAN……21 NORMAL…..26
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..-5
TOTAL DEPARTURE FOR THE MONTH……………………..-5 [-4.8 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………44 DEPARTURE……..+5
TOTAL HEATING UNITS FOR THE MONTH……………44 DEPARTURE……..+5
TOTAL HEATING UNITS FOR THE SEASON…………3187 DEPARTURE……-255
TOTAL HEATING UNITS LAST SEASON TO DATE…….2996 DEPARTURE……+191
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)………..35 NNW @ 04:56 P.M.
VECTOR #1 (1-Sec)……….34 NNW @ 04:56 P.M.
VECTOR #2 (1-Sec)……….M @
DAVIS #1……………….32 W @ 08:32 P.M.
DAVIS #2 ………………32 NNW @ 08:32 P.M.
RMY #1 (Instantaneous)…..35 NNW @ 04:55 P.M.
RMY #2 (Instantaneous)…..36 NW @ 08:32 P.M.
MERLIN…………………32 NE
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………23 NNW @ 08:26 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..23 @ 08:26 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..M
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………22 NW @ 08:01 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………22 NNW @ 04:51 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..22 NNW @ 08:26 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..23 NW @ 04:51 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..13.7 NNW [328 total miles]
VECTOR #1………………M
VECTOR #2………………M
DAVIS #1……………….12.9 NNW
DAVIS #2……………….12.8 N
RMY #1…………………11.7 NNW
RMY #2…………………11.8 NNW
RICHARDS (C5C)…………..OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.07 DEPARTURE…..-0.07
TOTAL PRECIPITATION FOR THE MONTH…………..0.07 DEPARTURE…..-0.07
TOTAL PRECIPITATION FOR THE YEAR (2025)……..2.42 DEPARTURE…..-2.22
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.3 DEPARTURE……-0.4
TOTAL SNOWFALL FOR THE MONTH………………..0.4 DEPARTURE……-0.3
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……21.4 DEPARTURE…..-13.0
————————————————————–
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/-5/0.00/0.0/413/71 29 SW VEC1 29 SW RMY 30
1/24 32/14/23/-3/0.00/0.0/507/87 21 W VEC1 22 WNW RMY 22
1/25 29/11/20/-6/0.00/0.0/504/86 26 W VEC1 26 W RMY 27
1/26 39/21/30/+4/0.00/0.0/453/77 48 W VEC1 48 W RMY 50
1/27 38/22/30/+4/0.00/0.0/590/100 38 SW VEC1 40 SW RMY 42
1/28 36/22/29/+3/T/T/504/85 65 WNW VEC1 65 WNW RMY 68
1/29 47/19/33/+7/0.04/1.0/250/42 56 WNW VEC1 56 WNW RMY 59
1/30 26/16/21/-5/T/T/585/98 35 WNW VEC1 35 NW RMY 35
1/31 40/23/32/+6/0.79/0.0/000/00 31 SSW VEC1 31 SSW RMY 32
————————————————————–
JANUARY DAILY RECORDS TO DATE
NONE.
————————————————————–
PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY 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
2/1 32/10/21/-5/0.07/0.4/…/.. 35 NNW VEC1 34 NNW RMY 35
2/2 The low since midnight is 5F, the daily normal low is 17F.
————————————————————–
FEBRUARY DAILY RECORDS TO DATE
NONE.
————————————————————–
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR FEBRUARY 2
HIGH 55F IN 1951, 1973
LOW -12F IN 1961
PRECIP 1.91 INS. IN 1999
SNOWFALL 16.5 INS. IN 2015
PEAK GUST 92 MPH SW IN 1970
RECORDS FOR FEBRUARY 3
HIGH 58F IN 1991
LOW -11F IN 2023
PRECIP 2.14 INS. IN 1970
SNOWFALL 7.0 INS. IN 1913
PEAK GUST 102 MPH S IN 1970 [RECORD FOR MONTH]
TODAY’S REPORT PREPARED BY: Amanda Joly
