Thursday, January 16, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
THURSDAY, JANUARY 16, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0710E
SUNSET: 1638E
LIGHTER WIND, BUT STILL COLD WITH INCREASING CLOUDINESS….
Clear skies and bright sunshine early this morning were rapidly
overtaken by increasing amounts of high cloud cover as a weak
system approaches from the west. By the time we reached mid to
late morning, the sunshine was quite filtered.
Temperatures, as mentioned, are still on the cold side today with
readings only reaching the upper 20s by early this afternoon. This
continues to run below the normal value for this time of year. The
dew point has been gradually rising from the mid to upper single
digits to the mid teens.
Winds are quite a bit lighter today, backing from the west-northwest
to the southwest as the day has progressed. The average speed
for the day so far is around 9mph, but the trend since the mid morning
hours has been for decreasing speed. The peak gust occurred early
this morning, just after 5am with a value of 20mph.
Visibility has been somewhat limited due to haziness, with the view
being no more than around 40-50 miles.
The maximum temperature for today is 29F degrees, which is 5 degrees
below the normal high of 34F. The minimum temperature since midnight
is 13F degrees, which is 5 degrees below the normal low of 18F.
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Today’s Observations:
7 A.M.
Weather: Thin scattered cirrus, few stratocumulus offshore distant
NE-SE-SSW, few altocumulus distant S-W
Temperature: 14F; Dew Point: 9F; Relative Humidity: 79%
Wind: W @ 9 kts
Sea-level pressure: 1017.2 mb; 30.04 in. Hg: falling, then rising
Visibility: 40 miles
6-hr Max temp: 15F
6-hr Min temp: 13F
24-hr Precip: 0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: Trace
BHO SA 1155 250 -SCT 40 172/14/9/2709/004/ FEW SC OFFSHR DSNT NE-SE-SSW
FEW AC DSNT S-W/ 8/551 4/000 55000 10015 20013
10 A.M.
Weather: Broken cirrus, few stratocumulus offshore distant NE-SE-SSW,
few cirrostratus all quadrants
Temperature: 24F; Dew Point: 12F; Relative Humidity: 61%
Wind: W @ 6 kts, wind light
Sea-level pressure: 1016.8 mb; 30.03 in. Hg: falling, then rising
Visibility: 40 miles
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 E250 BKN 40 168/24/12/2706/003/ FEW SC OFFSHR DSNT NNE-SE-SSW
FEW CS ALQDS WND LGT/ 8/506 55004
1 P.M.
Weather: Broken stratocumulus, broken cirrostratus, broken cirrus,
virga distant S-SSW
Temperature: 27F; Dew Point: 14F; Relative Humidity: 57%
Wind: SW @ 8G14 kts
Sea-level pressure: 1012.6 mb; 29.90 in. Hg: falling, then more slowly
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: Trace
BHO SA 1755 E45 BKN 180 BKN 250 BKN 50 126/27/14/2308G14/990/ VIRGA DSNT
S-SSW/ 8/506 4/000 56042 10029 20014
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SUMMARY FOR WEDNESDAY, JANUARY 15, 2025
TEMPERATURE (DEGREES F)
MAX…….29 NORMAL…..34
MIN…….16 NORMAL…..18
MEAN……23 NORMAL…..26
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..-3
TOTAL DEPARTURE FOR THE MONTH……………………..-5 [-0.5 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…………..571 DEPARTURE……..+4
TOTAL HEATING UNITS FOR THE SEASON…………2503 DEPARTURE……-274
TOTAL HEATING UNITS LAST SEASON TO DATE…….2376 DEPARTURE……+127
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)………..37 NW @ 10:56 A.M.
VECTOR #1 (1-Sec)……….37 NW @ 10:56 A.M.
VECTOR #2 (1-Sec)……….37 NW @ 10:56 A.M.
DAVIS #1……………….36 NW @ 09:58 A.M.
DAVIS #2 ………………34 NNW @ 11:04 A.M.
RMY #1 (Instantaneous)…..38 NW @ 04:04 P.M.
RMY #2 (Instantaneous)…..37 NW @ 11:50 A.M.
MERLIN…………………36 NW
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………27 NW @ 10:56 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..25 @ 10:01 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..27 @ 10:00 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………26 NW @ 04:05 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………26 NNW @ 10:00 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..25 NNW @ 10:01 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..26 NW @ 10:00 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..14.6 WNW [351 total miles]
VECTOR #1………………14.3
VECTOR #2………………15.6
DAVIS #1……………….14.9 WNW
DAVIS #2……………….15.2 NW
RMY #1…………………13.9 WNW
RMY #2…………………15.1 WNW
RICHARDS (C5C)…………..OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.15
TOTAL PRECIPITATION FOR THE MONTH…………..0.67 DEPARTURE…..-1.59
TOTAL PRECIPITATION FOR THE YEAR (2025)……..0.67 DEPARTURE…..-1.59
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.6
TOTAL SNOWFALL FOR THE MONTH………………..1.7 DEPARTURE……-6.8
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……14.3 DEPARTURE……-9.3
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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 The low since midnight is 13F, the daily normal low is 18F.
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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 16
HIGH 63F IN 1995
LOW -12F IN 2004
PRECIP 1.32 INS. IN 1936
SNOWFALL 14.0 INS. IN 1965
PEAK GUST 79 MPH WNW IN 1960
RECORDS FOR JANUARY 17
HIGH 55F IN 1973,1995
LOW -8F IN 1907,1982
PRECIP 1.43 INS. IN 1956
SNOWFALL 13.4 INS. IN 1956
PEAK GUST 65 MPH ESE IN 2022
TODAY’S REPORT PREPARED BY: Matt Douglas
