Tuesday, November 4, 2025

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

TUESDAY, NOVEMBER 4, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0622E
SUNSET:  1633E

PLENTY OF SUNSHINE TODAY, BUT VERY WINDY FOLLOWING A FRONTAL
PASSAGE LAST EVENING….

A front moved through the area late last evening bringing
a band of moderate rain showers. This system was pretty
potent and brought small hail, thunder, and lightning to
some communities. Here on the Hill only rain was observed.
However everyone shared in strong gusty winds as the front
pushed through. 0.16″ of rain was measured from this
system, most of which falling in the same hour between
9-10pm.

Today strong cold air advection is taking place which is
helping to mix down a strong low-level jet aloft. Our front
it was attached to a developing low pressure system that is
currently bombing out well to our northeast, and will be
a very formidable storm system for Newfoundland. For us
here, we’re left with strong winds as a result of the
above mentioned low level jet and tight pressure gradient.

Temperatures are again near seasonable levels, but it feels
colder due to lower dew point levels and the gusty wind.
Readings have reached the mid 50s by early this afternoon,
but the wind chill makes it feel more like the mid 40s.
The dew point has been gradually falling as the cold air
advection continues. Values have fallen from the mid 30s
early this morning to the upper 20s by early this afternoon.

The wind has been the main story today. A west-northwest to
northwest wind has been averaging at around 21mph for the
day so far. Gusts have been frequently exceeding 40mph since
the mid morning hours. The peak gust so far for the day is
52mph, which occurred just before the 1pm observation.

Visibility is excellent today with a view of 70-80 miles
through the day!

The maximum temperature so far today is 54F degrees, which is
equal to the normal high of 54F. The minimum temperature
since midnight is 42F degrees, which is 5 degrees above the
normal low of 37F.

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Today’s Observations:

7 A.M.
Weather: Clear, few stratocumulus distant S-W-N-ESE,
few altocumulus distant NNE-NE
Temperature: 44F; Dew Point: 34F; Relative Humidity: 68%
Wind: WNW @ 18G29 kts, peak wind WNW 35mph at 6:30 A.M.
Sea-level pressure: 1008.5 mb; 29.78 in. Hg: rising, then more rapidly
Visibility: 70 miles
6-hr Max temp: 44F
6-hr Min temp: 42F
24-hr Precip: 0.16 inches
BHO SA 1155 CLR 70 085/44/34/3018G29/978/ FEW SC DSNT S-W-N-ESE
FEW AC DSNT NNE-NE PK WND 2930/30/ 8/550 53017 70016 10044 20042

10 A.M.
Weather: Clear, few stratocumulus all quadrants
Temperature: 51F; Dew Point: 32F; Relative Humidity: 48%
Wind: NW @ 19G33 kts, peak wind WNW 48mph at 9:17 A.M.
Sea-level pressure: 1010.9 mb; 29.85 in. Hg: rising, then more slowly
Visibility: 80 miles
3-hr Precip: 0.00 inches
BHO SA 1455 CLR 80 109/51/32/3119G33/985/ FEW SC ALQDS
PK WND 3042/17/ 8/500 51024

1 P.M.
Weather: Scattered stratocumulus, virga distant WNW-N
Temperature: 54F Dew Point: 28F; Relative Humidity: 36%
Wind: NW @ 25G42 kts, peak wind NW 52mph at 12:53 P.M.
Sea-level pressure: 1012.0 mb; 29.88 in. Hg: rising, then more slowly
Visibility: 80 miles
6-hr Max temp: 54F
6-hr Min temp: 44F
6-hr Precip: 0.00 inches
BHO SA 1755 40 SCT 80 120/54/28/3125G42/988/ VIRGA DSNT WNW-N
PK WND 3145/53/ 8/500 51011 10054 20044

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SUMMARY FOR MONDAY, NOVEMBER 3, 2025

TEMPERATURE (DEGREES F)
MAX…….54   NORMAL…..55
MIN…….42   NORMAL…..38
MEAN……48   NORMAL…..46

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+2
TOTAL DEPARTURE FOR THE MONTH……………………….-2 [-0.9 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY…………….17  DEPARTURE……..-2
TOTAL HEATING UNITS FOR THE MONTH…………….57  DEPARTURE……..+1
TOTAL HEATING UNITS FOR THE SEASON…………..468  DEPARTURE…….-99
TOTAL HEATING UNITS LAST SEASON TO DATE………420  DEPARTURE…….+48

COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025)
TOTAL COOLING UNITS FOR YESTERDAY……………..0  DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH……………..0  DEPARTURE………0
TOTAL COOLING UNITS FOR THE SEASON…………..756  DEPARTURE…….+79
TOTAL COOLING UNITS LAST SEASON TO DATE………763  DEPARTURE……..-7

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 *=Last of multiple occurrences

F420C (Official)………..41 WNW  @   10:23 P.M.
VECTOR #1 (1-Sec)……….41 W    @   10:06 P.M.
VECTOR #2 (1-Sec)……….43 WSW  @   10:06 P.M.
DAVIS #1……………….40 W    @   10:23 P.M.
DAVIS #2 ………………45 W    @   10:06 P.M.
RMY #1 (Instantaneous)…..46 W    @   10:06 P.M.
RMY #2 (Instantaneous)…..47 WSW  @   10:06 P.M.
MERLIN…………………39 W
RICHARDS (C5C) (Inst)……41 W    @   10:06 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………27 WNW  @   10:24 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..27 W    @   10:07 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..28 WNW  @   10:25 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………29 W    @   10:07 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………29 WNW  @   10:06 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..26 W    @   10:07 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..27 WSW  @   10:06 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………26 W    @   10:07 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..11.3 S [270 total miles] VECTOR #1………………12.4
VECTOR #2………………12.9
DAVIS #1……………….11.8 SSW
DAVIS #2………………….M
RMY #1…………………12.0 SSW
RMY #2…………………13.0 SSW
RICHARDS (C5C)………….12.2

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.16 DEPARTURE…..+0.01
TOTAL PRECIPITATION FOR THE MONTH…………..0.16 DEPARTURE…..-0.29
TOTAL PRECIPITATION FOR THE YEAR (2025)…….42.47 DEPARTURE…..-2.14

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……0.1
TOTAL SNOWFALL FOR THE MONTH………………..0.0 DEPARTURE…..-0.1
TOTAL SNOWFALL FOR THE SEASON (2025-2026)…….0.0 DEPARTURE…..-0.8

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PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 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

11/1  56/38/47/+0/0.00/0.0/…/..        50 W   VEC1 50 W   RMY 50
11/2  53/33/43/-4/0.00/0.0/…/..        23 WNW VEC1 23 WNW RMY 24
11/3  54/42/48+2/0.16/0.0/…/..         41 WNW VEC1 41 W   RMY 46

11/4 The low since midnight is 42F, the daily normal low is 37F.

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NOVEMBER 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 NOVEMBER 4
HIGH 77 IN 1987
LOW 22 IN 1891
PRECIP 3.27 INCHES IN 1910
SNOWFALL 6.4 IN 1945
PEAK GUST 73 WNW IN 1965

RECORDS FOR NOVEMBER 5
HIGH 76 IN 1994
LOW 18 IN 1908
PRECIP 4.26 INCHES IN 1955
SNOWFALL 2.0 IN 1894
PEAK GUST 69 W IN 2004

TODAY’S REPORT PREPARED BY: Matt Douglas