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Wednesday, February 5, 2025

February 5, 2025

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA WEDNESDAY, FEBRUARY 5, 2025 ALL TIMES ARE…

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

WEDNESDAY, FEBRUARY 5, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0653E
SUNSET:  1704E

ARCTIC CHILL RETURNS WITH A BRISK WIND, BUT WITH PLENTY OF SUNSHINE….

Sunshine has been abundant today, but it is unfortunately of the
ineffective variety. Yet another arctic air mass has overtaking the
region sending temperatures below normal, which has been a common
theme so far this winter.

Temperatures dropped to the mid teens early this morning, but have
only recovered to the mid 20s by early this afternoon, which is
nearly 10 degrees below the normal values for the date. Dew point
readings have been in the single digits all day, indicative of the
arctic air mass in place.

Winds continue on the blustery side, albeit not as strong as they were
yesterday. A northwest wind has been averaging at around 12mph for the
day so far. The peak gust for the day so far is 32mph which occurred
just after 12:30pm.

Visibility is excellent again today, holding at around 70-80 miles
all day.

The maximum temperature for today is 26F degrees, which is 9 degrees
below the normal high of 35F. The minimum temperature since midnight
is 14F degrees, which is 4 degrees below the normal low of 18F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Broken cirrostratus, broken cirrus, few stratocumulus offshore
distant NE-ESE and distant SSE-S
Temperature: 15F; Dew Point: 6F; Relative Humidity: 70%
Wind: NW @ 9G15 kts
Sea-level pressure: 1027.0 mb; 30.33 in. Hg: rising, then more slowly
Visibility: 70 miles
6-hr Max temp: 19F
6-hr Min temp: 14F
24-hr Precip:  0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: Trace
BHO SA 1155 E200 BKN 250 BKN 70 270/15/6/3109G15/033/ FEW SC OFFSHR
DSNT NE-ESE AND DSNT SSE-S/ 8/508 4/000 51023 10019 20014

10 A.M.
Weather: Clear, few stratocumulus distant NW-NE-ESE, few cirrostratus
distant SSE-SW, few cirrus distant SW-W
Temperature: 21F; Dew Point: 8F; Relative Humidity: 56%
Wind: NW @ 13G18 kts
Sea-level pressure: 1028.4 mb; 30.37 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 70 284/21/8/3213G18/037/ FEW SC DSNT NW-NE-ESE
FEW CS DSNT SSE-SW FEW CI DSNT SW-W/ 8/505 51014

1 P.M.
Weather: Clear, few stratocumulus offshore distant NE-ESE, few cirrus
distant SSE-SW-W
Temperature: 26F; Dew Point: 5F; Relative Humidity: 41%
Wind: NW @ 14G23 kts, peak wind NW 32mph at 12:37 P.M.
Sea-level pressure: 1027.7 mb; 30.35 in. Hg: falling, then rising
Visibility: 80 miles
6-hr Max temp: 26F
6-hr Min temp: 14F
6-hr Precip:  0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: Trace
BHO SA 1755 CLR 80 277/26/5/3114G23/035/ FEW SC OFFSHR DSNT NE-ESE
FEW CI DSNT SSE-SW-W PK WND 3228/37/ 8/501 4/000 55007 10026 20014

————————————————————–

SUMMARY FOR TUESDAY, FEBRUARY 4, 2025

TEMPERATURE (DEGREES F)
MAX…….41   NORMAL…..35
MIN…….20   NORMAL…..18
MEAN……31   NORMAL…..26

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+5
TOTAL DEPARTURE FOR THE MONTH……………………..-4 [-1.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………34  DEPARTURE……..-5
TOTAL HEATING UNITS FOR THE MONTH…………..160  DEPARTURE……..+5
TOTAL HEATING UNITS FOR THE SEASON…………3303  DEPARTURE……-255
TOTAL HEATING UNITS LAST SEASON TO DATE…….3095  DEPARTURE……+208

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)………..51 NW   @   03:36 P.M.
VECTOR #1 (1-Sec)……….51 NW   @   03:36 P.M.
VECTOR #2 (1-Sec)……….54 WNW  @   03:26 P.M.
DAVIS #1……………….47 WNW  @   02:14 P.M.
DAVIS #2 ………………50 NW   @   03:32 P.M.
RMY #1 (Instantaneous)…..55 NW   @   03:43 P.M.
RMY #2 (Instantaneous)…..56 NW   @   03:32 P.M.
MERLIN…………………47 NW
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………36 NW   @   01:57 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..32      @   03:33 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..35      @   03:27 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………34 NW   @   03:33 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………34 NW   @   03:27 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..32 NW   @   03:54 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..34 NW   @   03:27 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..16.5 NW [395 total miles] VECTOR #1………………15.7
VECTOR #2………………16.6
DAVIS #1……………….16.3 NW
DAVIS #2……………….16.3 NW
RMY #1…………………15.4 NW
RMY #2…………………16.1 NW
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…………..0.22 DEPARTURE…..-0.33
TOTAL PRECIPITATION FOR THE YEAR (2025)……..2.57 DEPARTURE…..-2.48

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.7
TOTAL SNOWFALL FOR THE MONTH………………..1.9 DEPARTURE……-0.8
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……22.9 DEPARTURE…..-13.5

————————————————————–

PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY 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

2/1    32/10/21/-5/0.07/0.4/…/..        35 NNW VEC1 34 NNW RMY 35
2/2    24/5/15/-11/0.10/1.0/…/..        22 SE  VEC1 25 SE  RMY 24
2/3    42/24/33/+7/0.05/0.5/…/..        35 SSW VEC1 35 SSW RMY 35
2/4    41/20/31/+5/0.00/0.0/…/..        51 NW  VEC1 51 NW  RMY 55

2/5 The low since midnight is 14F, the daily normal low is 18F.

————————————————————–

FEBRUARY DAILY RECORDS TO DATE

NONE.

————————————————————–

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)

RECORDS FOR FEBRUARY 5
HIGH 65F IN 1991
LOW -14F IN 1918
PRECIP 1.62 INS. IN 2016
SNOWFALL 16.0 INS. IN 1907
PEAK GUST 67 MPH WNW IN 1969

RECORDS FOR FEBRUARY 6
HIGH 54F IN 1909
LOW -10F IN 1895
PRECIP 1.88 INS. IN 1896
SNOWFALL 13.0 INS. IN 1978 [BLIZZARD OF 1978] PEAK GUST 84e MPH NE IN 1978

TODAY’S REPORT PREPARED BY: Matt Douglas

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Data Use & Privacy Policy

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

Notice: By accessing, downloading, or using any Blue Hill Observatory data or services, you unconditionally accept and agree to be bound by this Policy in its entirety. If you do not agree, you may not access or use Observatory data.
Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
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