Friday, January 10, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
FRIDAY, JANUARY 10, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0712E
SUNSET: 1632E
CLEAR SKIES, WARMER TEMPERATURES, STILL BREEZY ON THE HILL TODAY….
Sunshine with only distant clouds offshore has been the theme today.
With the sunshine has come a slight warming in temperatures that have
brought us up to seasonal expectations.
Yesterday’s snow event yielded only a trace in the books for Blue Hill.
According to climate normals, we have a snowfall departure -7.4 inches
for the season and a liquid precipitation departure of -0.81 inches for
the year.
Temperatures have improved nicely since the pressure gradient has
started to weaken and move out of the region. We started this morning
in the lower 20s and have reached the mid 30s by early afternoon.
Despite the warming, the wind has kept us still feeling the cold
though, with wind chills in the upper teens to lower 20s throughout
the day. Wind chills were in the single digits this morning so it is
definitely an improvement at least.
Winds are fairly active today, but not as gusty as the previous few
days. The average speed for the day so far is around 16mph. The wind
has remained constant with winds from the NW and WNW directions. The
peak gust so far today is 39mph, which occurred just after midnight.
Visibility has been overall really nice. With the continued dry air and
clear sky conditions we have had up to 80 miles of viewing pleasure today!
The maximum temperature for today is 38F degrees, which is 3 degrees above
the normal high of 35F. The minimum temperature since midnight is 19F
degrees, which is equal to the normal low for today.
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Today’s Observations:
7 A.M.
Weather: Clear, few stratocumulus offshore distant NE-E-SW
Temperature: 20F; Dew Point: 15F; Relative Humidity: 80%
Wind: NW @ 13G20 kts
Sea-level pressure: 1008.4 mb; 29.78 in. Hg: rising unsteadily
Visibility: 50 miles
6-hr Max temp: 21F
6-hr Min temp: 19F
24-hr Precip: Trace
24-hr Snowfall: Trace
Snow Depth: 0 inches
BHO SA 1155 CLR 50 084/20/15/3113G20/978/ FEW SC OFFSHR DSNT NE-E-SW
TOTAL NEW SNW PST 24 HRS TRACE/ 8/500 52016 70000 10021 20019
10 A.M.
Weather: Clear, few stratocumulus offshore distant NE-E and SSW-SW
Temperature: 28F; Dew Point: 17F; Relative Humidity: 62%
Wind: WNW @ 12G18 kts
Sea-level pressure: 1010.4 mb; 29.84 in. Hg: rising unsteadily
Visibility: 70 miles
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 CLR 70 104/28/17/2912G18/984/ FEW SC OFFSHR DSNT NE-E AND
SSW-SW/ 8/500 52020
1 P.M.
Weather: Clear, few stratocumulus offshore distant NE-E, few cirrus
all quadrants
Temperature: 38F; Dew Point: 22F; Relative Humidity: 52%
Wind: NW @ 11 kts
Sea-level pressure: 1007.8 mb; 29.76 in. Hg: falling unsteadily
Visibility: 80 miles
6-hr Max temp: 38F
6-hr Min temp: 20F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 CLR 80 078/38/22/3211/976/ FEW SC OFFSHR DSNT NE-E
FEW CI ALQDS/ 8/501 57026 10038 20020
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SUMMARY FOR THURSDAY, JANUARY 9, 2025
TEMPERATURE (DEGREES F)
MAX…….25 NORMAL…..35
MIN…….13 NORMAL…..19
MEAN……19 NORMAL…..27
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………….-8
TOTAL DEPARTURE FOR THE MONTH…………………….-12 [-1.1 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………46 DEPARTURE……..+8
TOTAL HEATING UNITS FOR THE MONTH…………..347 DEPARTURE…….+11
TOTAL HEATING UNITS FOR THE SEASON…………2279 DEPARTURE……-267
TOTAL HEATING UNITS LAST SEASON TO DATE…….2214 DEPARTURE…….+65
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)………..46 NW @ 12:52 P.M.
VECTOR #1 (1-Sec)……….47 NW @ 09:32 A.M.
VECTOR #2 (1-Sec)……….49 NW @ 01:32 P.M.
DAVIS #1……………….45 NW @ 09:32 A.M.
DAVIS #2 ………………44 NNW @ 01:57 P.M.
RMY #1 (Instantaneous)…..51 NW @ 10:41 A.M.
RMY #2 (Instantaneous)…..50 NW @ 01:32 P.M.
MERLIN…………………44 NW
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………33 NW @ 11:28 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..32 @ 11:28 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..32 @ 02:57 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………34 NW @ 11:28 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………31 NNW @ 02:57 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..32 NW @ 11:28 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..31 WNW @ 02:57 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..21.9 NW [526 total miles]
VECTOR #1………………20.5
VECTOR #2………………21.9
DAVIS #1……………….21.3 NW
DAVIS #2……………….21.1 NNW
RMY #1…………………20.2 NW
RMY #2…………………21.1 WNW
RICHARDS (C5C)…………..OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….TRACE DEPARTURE…..-0.15
TOTAL PRECIPITATION FOR THE MONTH…………..0.55 DEPARTURE…..-0.81
TOTAL PRECIPITATION FOR THE YEAR (2025)……..0.55 DEPARTURE…..-0.81
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………TRACE DEPARTURE……-0.6
TOTAL SNOWFALL FOR THE MONTH………………TRACE DEPARTURE……-4.9
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……12.6 DEPARTURE……-7.4
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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/…/.. 46 NW VEC1 47 NW RMY 51
1/10 The low since midnight is 19F, the daily normal low is 19F.
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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 10
HIGH 58F IN 2016
LOW -7F IN 2004
PRECIP 2.74 INS. IN 1935
SNOWFALL 8.0 INS. IN 1896
PEAK GUST 73e SE IN 1977
RECORDS FOR JANUARY 11
HIGH 65F IN 2020
LOW -7F IN 1968
PRECIP 1.58 INS. IN 2008
SNOW 10.2 INS. 1927
PEAK GUST 95e MPH S IN 1980
TODAY’S REPORT PREPARED BY: Amanda Joly
