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Thursday, January 30, 2025

January 30, 2025

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA THURSDAY, JANUARY 30, 2025 ALL TIMES ARE…

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BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

THURSDAY, JANUARY 30, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0659E
SUNSET:  1656E

QUICK SHOT OF ARCTIC AIR TODAY, BUT WITH PLENTY OF SUNSHINE…

An arctic front pushed through yesterday afternoon with some rain and
snow showers accompanying it. None of the precipitation was enough to
be measurable however. Once the front passed through, the dew point
shot down rapidly from the 20s to the teens by last evening, and
continued into the single digits by early this morning.

Today is featuring plenty of sunshine, but it’s ineffective as the
temperatures have only recovered to the mid 20s by early this
afternoon.

Winds are still busy today, but not as strong as the past couple of
days. The speeds have been averaging around 15mph for the day so far,
frequent gusts of 20-30mph have been occurring through the day with a
peak gust so far of 35mph, which occurred just after the 1pm
observation.

Visibility is excellent today with the view increasing from 50 miles
early this morning to around 80 miles by early this afternoon.

The maximum temperature for today is 26F degrees, which is 9 degrees
below the normal high of 35F. The minimum temperature since midnight
is 16F degrees, which is 1 degree below the normal low of 17F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Scattered stratocumulus
Temperature: 16F; Dew Point: 5F; Relative Humidity: 62%
Wind: WNW @ 13G20 kts
Sea-level pressure: 1018.0 mb; 30.06 in. Hg: rising, then more rapidly
Visibility: 50 miles
6-hr Max temp: 21F
6-hr Min temp: 16F
24-hr Precip:  Trace
24-hr Snowfall: Trace
Snow Depth: 2 inches
BHO SA 1155 45 SCT 50 180/16/5/2913G20/006/ 8/500 4/002 53041 6000/
70000 10021 20016

10 A.M.
Weather: Clear, few stratuscumulus all quadrants
Temperature: 21F; Dew Point: 7F; Relative Humidity: 54%
Wind: WNW @ 12G20 kts
Sea-level pressure: 1020.2 mb; 30.13 in. Hg: rising, then more slowly
Visibility: 70 miles
3-hr Precip:  0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 CLR 70 202/21/7/2912G20/013/ FEW SC ALQDS/ 8/500 51022

1 P.M.
Weather: Clear, few stratocumulus distant NE-SE-SW-NW
Temperature: 25F; Dew Point: 3F; Relative Humidity: 38%
Wind: WNW @ 17G24 kts
Sea-level pressure: 1021.1 mb; 30.15 in. Hg: rising, then more rapidly
Visibility: 80 miles
6-hr Max temp: 26F
6-hr Min temp: 16F
6-hr Precip:  0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 2 inches
BHO SA 1755 CLR 80 211/25/3/2917G24/015/ FEW SC DSNT NE-SE-SW-NW/
8/500 4/002 53009 10026 20016

————————————————————–

SUMMARY FOR WEDNESDAY, JANUARY 29, 2025

TEMPERATURE (DEGREES F)
MAX…….47   NORMAL…..34
MIN…….19   NORMAL…..17
MEAN……33   NORMAL…..26

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+7
TOTAL DEPARTURE FOR THE MONTH…………………….-22 [-1.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………32  DEPARTURE……..-7
TOTAL HEATING UNITS FOR THE MONTH………….1134  DEPARTURE…….+19
TOTAL HEATING UNITS FOR THE SEASON…………3066  DEPARTURE……-259
TOTAL HEATING UNITS LAST SEASON TO DATE…….2890  DEPARTURE……+176

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)………..56 WNW  @   07:03 P.M.
VECTOR #1 (1-Sec)……….56 WNW  @   07:03 P.M.
VECTOR #2 (1-Sec)……….59 WNW  @   07:03 P.M.
DAVIS #1……………….58 W    @   07:03 P.M.
DAVIS #2 ………………56 WNW  @   07:03 P.M.
RMY #1 (Instantaneous)…..59 WNW  @   09:13 P.M.
RMY #2 (Instantaneous)…..60 WNW  @   07:03 P.M.
MERLIN…………………52 W
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………40 WNW  @   10:20 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..36      @   04:48 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..37      @   10:19 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………39 W    @   04:48 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………38 WNW  @   10:19 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..34 WNW  @   04:48 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..36 WNW  @   06:51 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..17.3 WNW [416 total miles] VECTOR #1………………17.3
VECTOR #2………………18.5
DAVIS #1……………….17.9 W
DAVIS #2……………….18.4 W
RMY #1…………………16.6 WSW
RMY #2…………………18.2 WSW
RICHARDS (C5C)…………..OTS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….TRACE DEPARTURE…..-0.14
TOTAL PRECIPITATION FOR THE MONTH…………..1.56 DEPARTURE…..-2.67
TOTAL PRECIPITATION FOR THE YEAR (2025)……..1.56 DEPARTURE…..-2.67

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………TRACE DEPARTURE……-0.6
TOTAL SNOWFALL FOR THE MONTH………………..8.4 DEPARTURE……-8.8
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……21.0 DEPARTURE…..-11.3

————————————————————–

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/-5/0.00/0.0/413/71        29 SW  VEC1 29 SW  RMY 30
1/24   32/14/23/-3/0.00/0.0/507/87        21 W   VEC1 22 WNW RMY 22
1/25   29/11/20/-6/0.00/0.0/504/86        26 W   VEC1 26 W   RMY 27
1/26   39/21/30/+4/0.00/0.0/453/77        48 W   VEC1 48 W   RMY 50
1/27   38/22/30/+4/0.00/0.0/590/100       38 SW  VEC1 40 SW  RMY 42
1/28   36/22/29/+3/T/T/504/85             65 WNW VEC1 65 WNW RMY 68
1/29   47/19/33/+7/0.04/1.0/250/42        56 WNW VEC1 56 WNW RMY 59

1/30 The low since midnight is 16F, 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 30
HIGH 60F IN 1914
LOW -8F IN 1948
PRECIP 1.12 INS. IN 1925
SNOWFALL 6.5 INS. IN 1986
PEAK GUST 76 MPH WNW IN 1962

RECORDS FOR JANUARY 31
HIGH 58F IN 1947, 2013
LOW -12F IN 1920
PRECIP 1.03 INS. IN 1914
SNOWFALL 9.0 INS. IN 1898
PEAK GUST 75 MPH NW IN 1974

TODAY’S REPORT PREPARED BY: Matt Douglas

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Please read the full Policy before accessing Observatory data · Effective January 1, 2025

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Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
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