Sunday, January 26, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SUNDAY, JANUARY 26, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0703E
SUNSET: 1651E
OVERCAST SKIES EARLY THIS MORNING GAVE WAY TO INCREASING SUNSHINE…
Skies started the day with lots of clouds around, but as the morning
progressed, clouds gradually broke giving way to increasing amounts of
sunshine as we pushed toward the noon hour.
Temperatures are warming up today, getting above the freezing mark for
the first time in a week (last Sunday)! Readings have reached the upper
30s by early this afternoon, which would feel nicer if we didn’t have
the gusty winds.
Winds have become quite gusty today following the passage of a weak
frontal system. A south-southwest wind early this morning has veered
around to the west-northwest by late morning, marking the passage of
the front. Speeds immediately began to increase, especially as we started
to get more sunshine (heating). The average speed for the day so far is
around 15mph. Gusts have been reaching the 40mph mark, with a peak gust
so far of 43mph occurring at 11:56am.
Visibility remains constrained by haziness, with views increasing from
around 20 miles early this morning to around 40 miles by early this
afternoon.
The maximum temperature for today is 39F degrees, which is 5 degrees
above the normal high of 34F. The minimum temperature since midnight
is 21F degrees, which is 4 degrees above the normal low of 17F.
————————————————————–
Today’s Observations:
7 A.M.
Weather: Broken stratocumulus, overcast altostratus
Temperature: 26F; Dew Point: 18F; Relative Humidity: 72%
Wind: SW @ 13 kts
Sea-level pressure: 1017.6 mb; 30.05 in. Hg: falling, then more slowly
Visibility: 20 miles, hazy
6-hr Max temp: 26F
6-hr Min temp: 21F
24-hr Precip: 0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 3 inches
BHO SA 1155 E70 BKN 90 OVC 20 176/26/18/2213/005/ HAZY/ 8/52/ 4/003
56017 10026 20021
10 A.M.
Weather: Broken cirrus, few stratocumulus distant SW, few altocumulus
distant W-N-E
Temperature: 33F; Dew Point: 22F; Relative Humidity: 62%
Wind: W @ 18G30 kts, peak wind W 35mph at 9:53 A.M.
Sea-level pressure: 1017.4 mb; 30.04 in. Hg: falling, then rising
Visibility: 30 miles, hazy
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 E250 BKN 30 174/33/22/2718G30/004/ FEW SC DSNT SW
FEW AC DSNT W-N-E HAZY PK WND 2730/53/ 8/551 55002
1 P.M.
Weather: Broken cirrus, few stratocumulus all quadrants
Temperature: 38F; Dew Point: 22F; Relative Humidity: 52%
Wind: WNW @ 19G33 kts, peak wind WNW 43mph at 11:56 A.M.
Sea-level pressure: 1015.8 mb; 30.00 in. Hg: falling, then steady
Visibility: 40 miles, hazy
6-hr Max temp: 39F
6-hr Min temp: 26F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 3 inches
BHO SA 1755 E250 BKN 40 158/38/22/2919G33/000/ FEW SC ALQDS HAZY
PK WND 2938/56/ 8/501 4/003 56016 10039 20026
————————————————————–
SUMMARY FOR SATURDAY, JANUARY 25, 2025
TEMPERATURE (DEGREES F)
MAX…….29 NORMAL…..34
MIN…….11 NORMAL…..17
MEAN……20 NORMAL…..26
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..-6
TOTAL DEPARTURE FOR THE MONTH…………………….-40 [-1.8 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………45 DEPARTURE……..+6
TOTAL HEATING UNITS FOR THE MONTH…………..996 DEPARTURE…….+38
TOTAL HEATING UNITS FOR THE SEASON…………2928 DEPARTURE……-240
TOTAL HEATING UNITS LAST SEASON TO DATE…….2768 DEPARTURE……+160
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)………..26 W @ 11:37 A.M.
VECTOR #1 (1-Sec)……….26 W @ 11:34 A.M.
VECTOR #2 (1-Sec)……….28 W @ 11:04 A.M.
DAVIS #1……………….27 W @ 11:37 A.M.
DAVIS #2 ………………28 W @ 11:05 A.M.
RMY #1 (Instantaneous)…..27 W @ 11:22 A.M.
RMY #2 (Instantaneous)…..28 W @ 11:04 A.M.
MERLIN…………………25 W
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………20 W @ 11:40 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..20 @ 11:38 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..22 @ 11:38 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………21 W @ 11:38 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………22 W @ 11:38 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..19 W @ 11:38 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..21 W @ 11:38 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..10.8 W [260 total miles]
VECTOR #1………………11.2
VECTOR #2………………11.8
DAVIS #1……………….11.5 WSW
DAVIS #2……………….11.8 W
RMY #1…………………10.8 W
RMY #2…………………11.6 WSW
RICHARDS (C5C)…………..OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.14
TOTAL PRECIPITATION FOR THE MONTH…………..1.52 DEPARTURE…..-2.15
TOTAL PRECIPITATION FOR THE YEAR (2025)……..1.52 DEPARTURE…..-2.15
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.6
TOTAL SNOWFALL FOR THE MONTH………………..7.4 DEPARTURE……-7.1
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……20.0 DEPARTURE……-9.6
————————————————————–
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/…/.. 29 SW VEC1 29 SW RMY 30
1/24 32/14/23/-3/0.00/0.0/…/.. 21 W VEC1 22 WNW RMY 22
1/25 29/11/20/-6/0.00/0.0/…/.. 26 W VEC1 26 W RMY 27
1/26 The low since midnight is 21F, the daily normal low is 17F.
————————————————————–
JANUARY DAILY RECORDS TO DATE
NONE.
————————————————————–
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR JANUARY 26
HIGH 68F IN 1950 [RECORD HIGH TIE FOR MONTH]
LOW -5F IN 1920
PRECIP 1.60 INS. IN 1958
SNOW 9.0 INS. IN 1898
WIND 90e MPH SE IN 1978
RECORDS FOR JANUARY 27
HIGH 63F IN 1974
LOW -12F IN 1924
PRECIP 1.94 INS. IN 2015
SNOWFALL 25.2 INS. IN 2015 [RECORD FOR MONTH]
PEAK GUST 91 MPH SSE IN 1996
TODAY’S REPORT PREPARED BY: Matt Douglas
