Sunday, January 19, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SUNDAY, JANUARY 19, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0708E
SUNSET: 1642E
SUNSHINE START WITH INCREASING CLOUDS AS SYSTEM MOVES THROUGH….
This morning featured a brilliant sunrise and we enjoyed mostly
sunny skies for the first part of the day. As midmorning approached,
increasing clouds moved into the area and by our final observation
we were at overcast conditions.
Yesterday’s low pressure system moved through quickly during the
evening hours and netted us 0.26 inches of rain. Even with the rain
temperatures have been tracking above normal for the past couple of
days. That will more than likely change with this next system that
is in the process of moving through our area.
The wind has been steady but on the lower side, averaging around 9 mph
for much of the day. Winds were mostly out of the NNW for most of the
morning and then shifted to the northeast and ENE directions right before
our final observation. That wind shift also decreased the wind as well as
the temperature pretty significantly. The peak gust so far for the day
occurred around 6:30am with a gust of 17 mph.
Thanks to the foggy conditions this morning we had about 30 miles of
visibility. Once the fog moved out we improved and have held steady at
around 40 miles for the remainder of the morning and early afternoon.
The maximum temperature for today is 43F degrees, which is 9 degrees
above the normal high of 34F. The minimum temperature since midnight
is 32F degrees, which is 14 degrees above the normal low of 18F.
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Today’s Observations:
7 A.M.
Weather: Clear, few altocumulus distant ENE-S-SSW
Temperature: 32F; Dew Point: 32F; Relative Humidity: 98%
Wind: NW @ 8 kts
Sea-level pressure: 1008.6 mb; 29.78 in. Hg: rising, then more
slowly
Visibility: 30 miles, thin fog all quadrants
6-hr Max temp: 37F
6-hr Min temp: 32F
24-hr Precip: 0.26 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0.0 inches
BHO SA 1155 CLR 30 086/32/32/3108/978/ FEW AC DSNT ENE-S-SSW THN F
ALQDS/ 8/050 51019 6000/ 70026 10037 20032
10 A.M.
Weather: Scattered altocumulus, few altocumulus castellanus distant
WSW-NW
Temperature: 40F; Dew Point: 36F; Relative Humidity: 86%
Wind: NW @ 7 kts
Sea-level pressure: 1010.6 mb; 29.84 in. Hg: rising unsteadily
Visibility: 40 miles
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 25 SCT 40 106/40/36/3207/984/ FEW AC/ACC DSNT WSW-NW/
8/050 52020
1 P.M.
Weather: Overcast altostratus, few stratocumulus all quadrants
Temperature: 42F; Dew Point: 33F; Relative Humidity: 69%
Wind: NE @ 5 kts, wind light
Sea-level pressure: 1008.2 mb; 29.77 in. Hg: falling, then more
rapidly
Visibility: 40 miles
6-hr Max temp: 43F
6-hr Min temp: 32F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 110 SCT E220 OVC 40 082/42/33/0605/977/ FEW SC ALQDS
SUN DIMLY VSBL WND LGT/ 8/52/ 58024 10043 20032
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SUMMARY FOR SATURDAY, JANUARY 18, 2025
TEMPERATURE (DEGREES F)
MAX…….44 NORMAL…..34
MIN…….27 NORMAL…..18
MEAN……36 NORMAL…..26
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………….+10
TOTAL DEPARTURE FOR THE MONTH……………………..+1 [-0.1 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………29 DEPARTURE…….-10
TOTAL HEATING UNITS FOR THE MONTH…………..682 DEPARTURE……..-2
TOTAL HEATING UNITS FOR THE SEASON…………2614 DEPARTURE……-280
TOTAL HEATING UNITS LAST SEASON TO DATE…….2505 DEPARTURE……+109
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)………..36 S @ 12:27 P.M.
VECTOR #1 (1-Sec)……….37 S @ 12:27 P.M.
VECTOR #2 (1-Sec)……….37 S @ 12:27 P.M.
DAVIS #1……………….39 S @ 12:23 P.M.
DAVIS #2 ………………51 S @ 12:27 P.M.
RMY #1 (Instantaneous)…..39 S @ 12:27 P.M.
RMY #2 (Instantaneous)…..39 S @ 12:27 P.M.
MERLIN…………………36 S
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………26 S @ 12:23 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..25 @ 12:28 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..26 @ 12:28 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………25 S @ 12:23 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………32 S @ 12:28 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..24 S @ 12:28 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..27 S @ 12:28 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..16.1 S [386 total miles]
VECTOR #1………………16.2
VECTOR #2………………16.8
DAVIS #1……………….15.9 S
DAVIS #2……………….17.9 S
RMY #1…………………15.7 S
RMY #2…………………17.1 S
RICHARDS (C5C)…………..OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.26 DEPARTURE…..+0.12
TOTAL PRECIPITATION FOR THE MONTH…………..0.93 DEPARTURE…..-1.77
TOTAL PRECIPITATION FOR THE YEAR (2025)……..0.93 DEPARTURE…..-1.77
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……-8.6
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……14.3 DEPARTURE…..-11.1
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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/…/.. 20 W VEC1 20 SSW RMY 20
1/17 35/16/26/0/T/T/…/.. 20 S VEC1 20 SSW RMY 20
1/18 44/27/36/+10/0.26/…/.. 36 S VEC1 37 S RMY 39
1/19 The low since midnight is 32F, 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 19
HIGH 59F IN 1973
LOW -11F IN 1887
PRECIP 2.34 INS. IN 1936
SNOWFALL 10.5 INS. IN 1936
PEAK GUST 93e MPH WNW IN 1943
RECORDS FOR JANUARY 20
HIGH 59F IN 1951
LOW -9F IN 1901
PRECIP 1.95 INS. IN 1978
SNOWFALL 19.0 INS. IN 1978
PEAK GUST 76e MPH NE IN 1978
TODAY’S REPORT PREPARED BY: Amanda Joly
