Wednesday, February 12, 2025

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

WEDNESDAY, FEBRUARY 12, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0644E
SUNSET:  1713E

CLOUDY AND COLD ONCE AGAIN TODAY, OCEAN EFFECT SNOW DEVELOPS….

Skies have been cloudy once again today as the first of two storm
systems passed to the south of the region overnight. The wind has
how veered from the west-southwest to the east during the course
of this morning. This easterly flow is now bringing some light
ocean effect snow into the area, which started just after 10am this
morning. So far, it’s been light enough that it’s not accumulating
despite temperatures remaining at or below freezing.

The temperature did reach the freezing mark briefly late this
morning, but has fallen back a bit to the upper 20s to around 30F.
This is still below normal for today’s date. Dew point values have
been rising steadily from the mid teens early this morning to the
mid to upper 20s by early this afternoon thanks to the onshore flow.

The wind gradually veered from the west-southwest with rather light
speeds, through north, and then finally east with increasing speeds.
The average speed for the day so far is around 8mph, but it’s been
averaging closer to 10-15mph over the past couple of hours. Gusts
have gotten into the 20s, with a peak gust so far of 29mph occurring
at 11:26am.

Visibility has been limited today, first due to haziness, and then
due to thin fog and light snow. The view started the day around 30
miles, but has dropped to only around 10-15 miles with the light
snow falling.

The maximum temperature for today is 32F degrees, which is 4 degrees
below the normal high of 36F. The minimum temperature since midnight
is 24F degrees, which is 5 degrees above the normal low of 19F.

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Today’s Observations:

7 A.M.
Weather: Scattered altocumulus, thin broken cirrus, few stratocumulus
distant NNE-ESE
Temperature: 25F; Dew Point: 17F; Relative Humidity: 72%
Wind: NNE @ 7 kts
Sea-level pressure: 1026.8 mb; 30.32 in. Hg: rising, then more rapidly
Visibility: 30 miles, hazy
6-hr Max temp: 26F
6-hr Min temp: 24F
24-hr Precip:  0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 3 inches
BHO SA 1155 110 SCT E250 -BKN 30 268/25/17/0207/032/ FEW SC DSNT NNE-ESE
HAZY/ 8/551 4/003 53013 10026 20024

10 A.M.
Weather: Broken stratocumulus, overcast altostratus, sun dimly visible
Temperature: 31F; Dew Point: 25F; Relative Humidity: 79%
Wind: NE @ 10G17 kts
Sea-level pressure: 1028.1 mb; 30.36 in. Hg: rising, then more rapidly
Visibility: 30 miles, hazy
3-hr Precip:  0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 E20 BKN 95 OVC 30 281/31/25/0410G17/036/ SUN DMLY VSBL HAZY/
8/52/ 53013

1 P.M.
Weather: Overcast stratocumulus, very light snow
Temperature: 30F; Dew Point: 27F; Relative Humidity: 90%
Wind: E @ 12G20 kts
Sea-level pressure: 1027.3 mb; 30.34 in. Hg: falling, then more rapidly
Visibility: 12 miles, thin fog
6-hr Max temp: 32F
6-hr Min temp: 25F
6-hr Precip:  Trace
6-hr Snowfall: Trace
Snow Depth: 3 inches
BHO SA 1755 E13 OVC 12S- 273/30/27/0812G20/034/ THN F ALQDS PCPN VRY LGT/
8/5// 4/003 58008 6000/ 10032 20025

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SUMMARY FOR TUESDAY, FEBRUARY 11, 2025

TEMPERATURE (DEGREES F)
MAX…….30   NORMAL…..36
MIN…….14   NORMAL…..19
MEAN……22   NORMAL…..27

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..-5
TOTAL DEPARTURE FOR THE MONTH…………………….-17 [-1.7 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………43  DEPARTURE……..+5
TOTAL HEATING UNITS FOR THE MONTH…………..439  DEPARTURE…….+18
TOTAL HEATING UNITS FOR THE SEASON…………3582  DEPARTURE……-243
TOTAL HEATING UNITS LAST SEASON TO DATE…….3292  DEPARTURE……+290

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)………..23 WSW  @   01:03 P.M.
VECTOR #1 (1-Sec)……….22 WSW  @   01:03 P.M.
VECTOR #2 (1-Sec)……….23 WSW  @   01:03 P.M.
DAVIS #1……………….22 W    @   12:26 P.M.
DAVIS #2 ………………22 WSW  @   01:04 P.M.
RMY #1 (Instantaneous)…..23 W    @   12:26 P.M.
RMY #2 (Instantaneous)…..23 W    @   10:48 A.M.
MERLIN…………………21 W
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………16 W    @   12:21 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..16      @   12:21 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..16      @   12:21 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………17 W    @   12:21 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………16 W    @   12:21 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..16 W    @   12:21 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..16 W    @   12:21 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………9.5 WSW [228 total miles] VECTOR #1……………….9.7
VECTOR #2……………….9.9
DAVIS #1………………..9.8 WSW
DAVIS #2………………..9.9 WSW
RMY #1………………….9.5 WSW
RMY #2………………….9.8 WSW
RICHARDS (C5C)…………..OTS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.13
TOTAL PRECIPITATION FOR THE MONTH…………..0.83 DEPARTURE…..-0.64
TOTAL PRECIPITATION FOR THE YEAR (2025)……..3.18 DEPARTURE…..-2.79

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.6
TOTAL SNOWFALL FOR THE MONTH………………..7.0 DEPARTURE……-0.4
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……28.0 DEPARTURE…..-13.1

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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/-5/0.07/0.4/000/00        35 NNW VEC1 34 NNW RMY 35
2/2    24/5/15/-11/0.10/1.0/260/43        22 SE  VEC1 25 SE  RMY 24
2/3    42/24/33/+7/0.05/0.5/321/53        35 SSW VEC1 35 SSW RMY 35
2/4    41/20/31/+5/0.00/0.0/542/89        51 NW  VEC1 51 NW  RMY 55
2/5    27/14/21/-6/0.00/0.0/562/92        32 NW  VEC1 32 NW  RMY 32
2/6    32/16/24/-3/0.22/1.0/000/00        26 SE  VEC1 28 SE  RMY 25
2/7    38/22/30/+3/0.00/0.0/542/88        48 WNW VEC1 49 WNW RMY 50
2/8    35/19/27/0/0.09/1.1/433/70         23 W   VEC1 22 W   RMY 23
2/9    29/23/26/-1/0.30/3.0/…/..        24 N   VEC1 24 N   RMY 24
2/10   33/19/26/-1/0.00/0.0/…/..        26 WNW VEC1 27 NW  RMY 28
2/11   30/14/22/-5/0.00/0.0/…/..        23 WSW VEC1 22 WSW RMY 23

2/12 The low since midnight is 24F, the daily normal low is 19F.

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FEBRUARY 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 FEBRUARY 12
HIGH 59F IN 2022
LOW -14F IN 1914
PRECIP 4.85 INCHES IN 1886 [RECORD FOR MONTH] SNOWFALL 15.0 INCHES IN 2006
PEAK GUST 70 MPH E IN 1985

RECORDS FOR FEBRUARY 13
HIGH 64F IN 1951
LOW -10F IN 1967
PRECIP 2.80 INCHES IN 2008
SNOWFALL 9.0 INCHES IN 1899
PEAK GUST 60 MPH SE IN 1972

TODAY’S REPORT PREPARED BY: Matt Douglas