Saturday, January 18, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SATURDAY, JANUARY 18, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0709E
SUNSET: 1641E
TURNING MILDER WITH INCREASING CLOUDINESS….
Clouds have increased in coverage through the morning hours ahead of
our next storm system. A decent breeze out of the south-southwest has
allowed temperatures to rise nicely, despite the now overcast skies.
The low today occurred right at midnight, at 27F degrees. Since then,
we have steadily risen into the low 40s. The dew point has also been
increasing, reaching the mid 30s by the early afternoon.
After a quiet day yesterday, winds picked up through the overnight.
The average speed so far is 18mph out of the south-southwest. Frequent
gusts of 25-35mph have been occurring over the past few hours. The
peak gust to this point took place at 12:27pm with a speed of 36mph.
Visibility remains limited due to thin fog and haziness. Views have
remained in the 20-30 mile range all day.
The maximum temperature for today is 41F degrees, which is 7 degrees
above the normal high of 34F. The minimum temperature since midnight
is 27F degrees, which is 9 degrees above the normal low of 18F.
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Today’s Observations:
7 A.M.
Weather: Scattered altocumulus, broken cirrus,
few stratocumulus distant NE-SSW
Temperature: 30F; Dew Point: 27F; Relative Humidity: 88%
Wind: SSW @ 16G21 kts
Sea-level pressure: 1018.5 mb; 30.08 in. Hg: rising, then falling
Visibility: 20 miles, thin fog all quadrants
6-hr Max temp: 30F
6-hr Min temp: 27F
24-hr Precip: 0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: Trace
BHO SA 1155 80 SCT E250 BKN 20 185/30/27/2016G21/008/ FEW SC DSNT NE-SSW
THN F ALQDS/ 8/551 4/000 58002 10030 20027
10 A.M.
Weather: Scattered stratocumulus, overcast cirrostratus,
few breaks in overcast with higher clouds visible N-E,
sun dimly visible
Temperature: 37F; Dew Point: 30F; Relative Humidity: 77%
Wind: SSW @ 16G22 kts
Sea-level pressure: 1018.4 mb; 30.07 in. Hg: falling, then rising
Visibility: 30 miles, hazy
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 35 SCT E210 OVC 30 184/37/30/2016G22/007/ FEW BINOVC N-E HIER
CLDS VSBL N-E SUN DIMLY VSBL HAZY/ 8/507 55001
1 P.M.
Weather: Broken stratocumulus, overcast altostratus
Temperature: 41F; Dew Point: 34F; Relative Humidity: 77%
Wind: S @ 17G26 kts, peak wind S 36mph @ 12:27pm
Sea-level pressure: 1013.9 mb; 29.94 in. Hg: falling, then more rapidly
Visibility: 30 miles, hazy
6-hr Max temp: 41F
6-hr Min temp: 30F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 E25 BKN 130 OVC 30 139/41/34/1817G26/994/ HAZY PK WND 1831/27/
8/52/ 58045 10041 20030
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SUMMARY FOR FRIDAY, JANUARY 17, 2025
TEMPERATURE (DEGREES F)
MAX…….35 NORMAL…..34
MIN…….16 NORMAL…..18
MEAN……26 NORMAL…..26
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………0
TOTAL DEPARTURE FOR THE MONTH……………………..-9 [-0.3 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………39 DEPARTURE………0
TOTAL HEATING UNITS FOR THE MONTH…………..653 DEPARTURE……..+8
TOTAL HEATING UNITS FOR THE SEASON…………2585 DEPARTURE……-270
TOTAL HEATING UNITS LAST SEASON TO DATE…….2460 DEPARTURE……+125
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)………..20 S @ 11:50 P.M.
VECTOR #1 (1-Sec)……….20 SSW @ 11:51 P.M.
VECTOR #2 (1-Sec)……….20 SSW @ 11:29 P.M.
DAVIS #1……………….21 S @ 11:50 P.M.
DAVIS #2 ………………20 S @ 11:53 P.M.
RMY #1 (Instantaneous)…..20 SSW @ 11:20 P.M.
RMY #2 (Instantaneous)…..20 S @ 11:50 P.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………15 S @ 11:58 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..16 @ 11:56 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..15 @ 11:57 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………16 S @ 11:56 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………16 S @ 11:57 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..15 S @ 11:50 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..16 S @ 11:59 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………7.5 NW [181 total miles]
VECTOR #1……………….7.9
VECTOR #2……………….8.3
DAVIS #1………………..7.6 WNW
DAVIS #2………………..7.7 WNW
RMY #1………………….7.7 WNW
RMY #2………………….8.2 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…..-1.89
TOTAL PRECIPITATION FOR THE YEAR (2025)……..0.67 DEPARTURE…..-1.89
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……-8.0
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……14.3 DEPARTURE…..-10.5
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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 The low since midnight is 27F, 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 18
HIGH 62F IN 1973, 1990
LOW -10F IN 1982
PRECIP 1.68 INS. IN 1915
SNOWFALL 13.0 INS. IN 1948
PEAK GUST 85 MPH SSE IN 2006
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
TODAY’S REPORT PREPARED BY: Joshua Polen
