Saturday, January 11, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SATURDAY, JANUARY 11, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0712E
SUNSET: 1633E
DISTURBANCE YIELDS FIRST MEASURABLE SNOW OF THE MONTH….
Flakes began flying here a little more than an hour before sunrise,
and have continued to fall since. Though the intensity has remained
rather light, below-freezing temperatures have allowed for some
accumulation. So far, we have received 0.7″ of snow, with a liquid
equivalent of 0.06″.
The temperature was on an upward trajectory as early as 2am thanks to
a light easterly breeze, making it to 30F just before 6am. Thereafter,
winds went calm, and the temperature rapidly dropped several
degrees into the mid 20s. We briefly touched 30F again at noon, before
falling back to the upper 20s by 1pm.
Winds have been on the quiet side today, a welcomed change from recent
days. The average speed so far is about 5mph, now out of the
north-northwest. Winds were nearly calm from 7-10am this morning, and
are slowly picking up as we head into the afternoon. The peak gust
occurred around 2:15am, with a speed of 14mph.
Visibility has been poor due to the ongoing snow and associated fog.
Views have ranged from 2-5 miles.
The maximum temperature for today is 30F degrees, which is 5 degrees
below the normal high of 35F. The minimum temperature since midnight
is 26F degrees, which is 7 degrees above the normal low of 19F.
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Today’s Observations:
7 A.M.
Weather: Light snow and fog, broken stratus fractus, overcast nimbostratus
Temperature: 26F; Dew Point: 26F; Relative Humidity: 100%
Wind: Calm
Sea-level pressure: 1001.3 mb; 29.57 in. Hg: falling, then more rapidly
Visibility: 2 miles, fog
6-hr Max temp: 30F
6-hr Min temp: 26F
24-hr Precip: 0.01 inches
24-hr Snowfall: 0.1 inches
Snow Depth: Trace
BHO SA 1155 E5 BKN 35 OVC 2S-F 013/26/26/0000/957/ WND CALM
TOTAL NEW SNW PST 24 HRS 0.1 INS/ 8/72/ 4/000 58022 6001/ 70001 10030 20026
10 A.M.
Weather: Light snow and fog, broken stratus fractus, overcast nimbostratus
Temperature: 28F; Dew Point: 28F; Relative Humidity: 100%
Wind: NNW @ 2 kts, wind light
Sea-level pressure: 999.8 mb; 29.52 in. Hg: falling unsteadily
Visibility: 2 miles, fog
3-hr Precip: 0.03 inches
3-hr Snowfall: 0.4 inches
BHO SA 1455 E3 BKN 40 OVC 2S-F 998/28/28/3402/952/ WND LGT
TOTAL NEW SNW PST 3 HRS 0.4 INS/ 8/72/ 57015 6003/
1 P.M.
Weather: Very light snow and fog, broken stratus fractus,
overcast nimbostratus
Temperature: 29F; Dew Point: 29F; Relative Humidity: 97%
Wind: N @ 7 kts
Sea-level pressure: 996.5 mb; 29.43 in. Hg: falling, then more rapidly
Visibility: 5 miles, fog
6-hr Max temp: 30F
6-hr Min temp: 26F
6-hr Precip: 0.05 inches
6-hr Snowfall: 0.6 inches
Snow Depth: 1 inch
BHO SA 1755 E8 BKN 45 OVC 5S-F 965/29/29/3507/943/ PCPN VRY LGT
TOTAL NEW SNW PST 6 HRS 0.6 INS/ 8/72/ 4/001 58033 6005/ 10030 20026
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SUMMARY FOR FRIDAY, JANUARY 10, 2025
TEMPERATURE (DEGREES F)
MAX…….40 NORMAL…..35
MIN…….19 NORMAL…..19
MEAN……30 NORMAL…..27
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+3
TOTAL DEPARTURE FOR THE MONTH……………………..-9 [-1.1 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………35 DEPARTURE……..-3
TOTAL HEATING UNITS FOR THE MONTH…………..382 DEPARTURE……..+8
TOTAL HEATING UNITS FOR THE SEASON…………2314 DEPARTURE……-270
TOTAL HEATING UNITS LAST SEASON TO DATE…….2232 DEPARTURE…….+82
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)………..39 NW @ 12:37 A.M.
VECTOR #1 (1-Sec)……….39 NW @ 12:23 A.M.
VECTOR #2 (1-Sec)……….41 WNW @ 12:23 A.M.
DAVIS #1……………….37 WNW @ 12:23 A.M.
DAVIS #2 ………………36 NW @ 12:23 A.M.
RMY #1 (Instantaneous)…..42 NW @ 12:23 A.M.
RMY #2 (Instantaneous)…..43 WNW @ 12:36 A.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………28 NW @ 12:37 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..27 @ 01:43 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..27 @ 12:26 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………27 NW @ 01:43 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………26 NNW @ 12:26 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..27 NW @ 12:38 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..26 WNW @ 12:26 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..13.8 NW [332 total miles]
VECTOR #1………………13.6
VECTOR #2………………14.4
DAVIS #1……………….13.9 NW
DAVIS #2……………….13.7 NNW
RMY #1…………………13.4 NW
RMY #2…………………13.9 NW
RICHARDS (C5C)…………..OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.01 DEPARTURE…..-0.14
TOTAL PRECIPITATION FOR THE MONTH…………..0.56 DEPARTURE…..-0.95
TOTAL PRECIPITATION FOR THE YEAR (2025)……..0.56 DEPARTURE…..-0.95
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.1 DEPARTURE……-0.5
TOTAL SNOWFALL FOR THE MONTH………………..0.1 DEPARTURE……-5.4
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……12.7 DEPARTURE……-7.9
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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 40/19/30/+3/0.00/0.0/…/.. 39 NW VEC1 39 NW RMY 42
1/11 The low since midnight is 26F, 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 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
RECORDS FOR JANUARY 12
HIGH 68F IN 2020 [RECORD HIGH TIE FOR MONTH]
LOW -15F IN 1886
PRECIP 2.04 INS. IN 2011
SNOW 18.2 INS. IN 2011
WIND 84e MPH S IN 1980
TODAY’S REPORT PREPARED BY: Joshua Polen
