Saturday, February 15, 2025

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

SATURDAY, FEBRUARY 15, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0640E
SUNSET:  1717E

THE CALM BEFORE YET ANOTHER STORM….

Our active stretch of weather is set to continue with the arrival of
another storm system later today. Out ahead of it, mid and upper level
clouds have increased in coverage, creating overcast conditions by late
morning.

Temperatures remain below normal today, but due to light winds, it
doesn’t feel quite as cold as it did yesterday. We began the morning
in the mid teens and have since warmed into the upper 20s. The dew
point has hovered between the upper single digits and the low teens
all day.

Winds slowed significantly overnight after a gusty day yesterday. Our
average speed is only 6mph, with the past several hours in the 1-3mph range.
The peak gust to this point is only 16mph, occurring just before 2am.

Visibility was limited to 30 miles this morning due to haziness, but
quickly improved to 70 miles thereafter.

The maximum temperature for today is 28F degrees, which is 9 degrees
below the normal high of 37F. The minimum temperature since midnight
is 15F degrees, which is 4 degrees below the normal low of 19F.

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Today’s Observations:

7 A.M.
Weather: Scattered altocumulus, broken cirrus
Temperature: 15F; Dew Point: 10F; Relative Humidity: 80%
Wind: NW @ 4 kts, wind light
Sea-level pressure: 1033.9 mb; 30.53 in. Hg: rising, then falling
Visibility: 30 miles, hazy
6-hr Max temp: 18F
6-hr Min temp: 15F
24-hr Precip:  0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 2 inches
BHO SA 1155 120 SCT E250 BKN 30 339/15/10/3104/053/ HAZY WND LGT/ 8/051
4/002 58001 10018 20015

10 A.M.
Weather: Scattered altocumulus, broken cirrostratus, broken cirrus
Temperature: 24F; Dew Point: 10F; Relative Humidity: 54%
Wind: NNW @ 3 kts, wind light
Sea-level pressure: 1032.7 mb; 30.50 in. Hg: falling, then more rapidly
Visibility: 70 miles
3-hr Precip:  0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 110 SCT E220 BKN 250 BKN 70 327/24/10/3303/050/ WND LGT/
8/056 58012

1 P.M.
Weather: Scattered altocumulus, overcast altostratus
Temperature: 27F; Dew Point: 11F; Relative Humidity: 51%
Wind: SSW @ 2 kts, wind light
Sea-level pressure: 1029.9 mb; 30.41 in. Hg: falling, then more rapidly
Visibility: 70 miles
6-hr Max temp: 28F
6-hr Min temp: 15F
6-hr Precip:  0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 2 inches
BHO SA 1755 100 SCT E120 OVC 70 299/27/11/2102/041/ WND LGT/ 8/07/ 4/002 58028
10028 20015

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SUMMARY FOR FRIDAY, FEBRUARY 14, 2025

TEMPERATURE (DEGREES F)
MAX…….32   NORMAL…..37
MIN…….20   NORMAL…..19
MEAN……26   NORMAL…..28

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..-2
TOTAL DEPARTURE FOR THE MONTH…………………….-14 [-1.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………39  DEPARTURE……..+2
TOTAL HEATING UNITS FOR THE MONTH…………..547  DEPARTURE…….+14
TOTAL HEATING UNITS FOR THE SEASON…………3690  DEPARTURE……-246
TOTAL HEATING UNITS LAST SEASON TO DATE…….3394  DEPARTURE……+296

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)………..50 NW   @   10:37 A.M.
VECTOR #1 (1-Sec)……….50 NW   @   10:38 A.M.
VECTOR #2 (1-Sec)……….50 NW   @   10:44 A.M.
DAVIS #1……………….48 NW   @   10:38 A.M.
DAVIS #2 ………………46 NW   @   11:34 A.M.
RMY #1 (Instantaneous)…..54 NW   @   10:38 A.M.
RMY #2 (Instantaneous)…..53 NW   @   10:44 A.M.
MERLIN…………………45 NW
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………33 NW   @   11:37 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..33      @   10:37 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..33      @   11:34 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………34 NW   @   10:37 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………33 NW   @   11:34 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..32 NW   @   10:37 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..32 WNW  @   11:34 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..18.3 WNW [439 total miles] VECTOR #1………………17.3
VECTOR #2………………19.2
DAVIS #1……………….18.3 WNW
DAVIS #2……………….18.9 NW
RMY #1…………………16.6 WNW
RMY #2…………………18.6 WNW
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…………..1.29 DEPARTURE…..-0.59
TOTAL PRECIPITATION FOR THE YEAR (2025)……..3.64 DEPARTURE…..-2.74

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.6
TOTAL SNOWFALL FOR THE MONTH………………..8.1 DEPARTURE……-1.2
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……29.1 DEPARTURE…..-13.9

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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/-1/0.30/3.0/006/01        24 N   VEC1 24 N   RMY 24
2/10   33/19/26/-1/0.00/0.0/343/55        26 WNW VEC1 27 NW  RMY 28
2/11   30/14/22/-5/0.00/0.0/232/37        23 WSW VEC1 22 WSW RMY 23
2/12   32/24/28/0/0.04/0.4/006/01         29 ENE VEC1 29 ENE RMY 28
2/13   38/28/33/+5/0.42/0.7/000/00        52 WNW VEC1 52 WNW RMY 55
2/14   32/20/26/-2/0.00/0.0/…/..        50 NW  VEC1 50 NW  RMY 54

2/15 The low since midnight is 15F, 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 15
HIGH 60F IN 1954
LOW -18F IN 1943
PRECIP 2.07 INCHES IN 1940
SNOWFALL 14.4 INCHES IN 2015
PEAK GUST 94e MPH WNW IN 1946

RECORDS FOR FEBRUARY 16
HIGH 62F IN 1954
LOW -16F IN 1943
PRECIP 1.91 INCHES IN 1958
SNOWFALL 18.6 INCHES IN 1958
PEAK GUST 78 MPH W IN 1967

TODAY’S REPORT PREPARED BY: Joshua Polen