Friday, February 21, 2025

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

FRIDAY, FEBRUARY 21, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0632E
SUNSET:  1725E

PLENTY OF SUNSHINE TODAY, COLD AND BLUSTERY YET AGAIN….

We started the day under partly to mostly cloudy skies which slowly
started to clear as the day progressed. Sunshine and blustery winds
have been the theme for today, so although we have managed to get
closer to seasonable temperatures, it really doesn’t feel like it!

As mentioned, temperatures have warmed slightly, though the wind chill
has not given us the satisfaction of experiencing the “warmth” of
above freezing temperatures. We have finally reached above freezing
which we haven’t seen since last Sunday!

Yesterday we had some brief ocean effect snow that only amounted to
a trace of liquid and snow precipitation.

Late last night, the winds picked up and have pretty much stayed
consistent all day. The average speed for the day so far is at an
impressive 17mph, with a predominately northwesterly flow. We have had
frequent gusts over 30mph throughout the day and our peak gust so far
is 37mph, which occurred after our final observation, around 1:08pm.

Visibility has slowly improved as the clouds moved from our area. We
started this morning at 40 miles and made it up to around 60 miles
by the early afternoon. A low dew point, hovering between 10-12F has
also been responsible for giving us a crisp blue sky for much of the day.

The maximum temperature for today is 32F degrees, which is 6 degrees below
the normal high of 38F. The minimum temperature since midnight is 17F
degrees, which is 4 degrees below the normal low of 21F.

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Today’s Observations:

7 A.M.
Weather: Scattered stratocumulus, broken altostratus
Temperature: 18F; Dew Point: 11F; Relative Humidity: 75%
Wind: NW @ 12G22 kts
Sea-level pressure: 1013.2 mb; 29.92 in. Hg: rising, then more rapidly
Visibility: 40 miles
6-hr Max temp: 22F
6-hr Min temp: 17F
24-hr Precip:  Trace
24-hr Snowfall: Trace
Snow Depth: 4 inches
BHO SA 1155 100 SCT E120 BKN 40 132/18/11/3112G22/992/ TOTAL NEW SNW PST
24 HRS TRACE/ 8/550 4/004 53027 70000 10022 20017

10 A.M.
Weather: Broken altocumulus
Temperature: 23F; Dew Point: 11F; Relative Humidity: 59%
Wind: NW @ 13G25 kts, peak wind 35mph NW at 9:43 a.m.
Sea-level pressure: 1014.6 mb; 29.96 in. Hg: rising, then more slowly
Visibility: 50 miles
3-hr Precip:  0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 E110 BKN 50 146/23/11/3213G25/996/ PK WND 3230/43/
8/050 51014

1 P.M.
Weather: Clear, few altocumulus all quadrants
Temperature: 32F; Dew Point: 10F; Relative Humidity: 40%
Wind: NW @ 15G22 kts, peak wind 33mph NW at 12:06 p.m.
Sea-level pressure: 1014.7 mb; 29.96 in. Hg: rising, then falling
Visibility: 60 miles
6-hr Max temp: 32F
6-hr Min temp: 18F
6-hr Precip:  0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 4 inches
BHO SA 1755 CLR 60 147/32/10/3115G22/996/ FEW AC ALQDS PK WND 3229/06/
8/050 4/004 50001 10032 20018

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SUMMARY FOR THURSDAY, FEBRUARY 20, 2025

TEMPERATURE (DEGREES F)
MAX…….29   NORMAL…..38
MIN…….11   NORMAL…..20
MEAN……20   NORMAL…..29

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..-9
TOTAL DEPARTURE FOR THE MONTH…………………….-53 [-2.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………45  DEPARTURE……..+9
TOTAL HEATING UNITS FOR THE MONTH…………..804  DEPARTURE…….+53
TOTAL HEATING UNITS FOR THE SEaASON…………3947  DEPARTURE……-207
TOTAL HEATING UNITS LAST SEASON TO DATE…….3616  DEPARTURE……+331

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)………..26 NW   @   11:17 P.M.
VECTOR #1 (1-Sec)……….27 NW   @   11:17 P.M.
VECTOR #2 (1-Sec)……….27 NW   @   11:48 P.M.
DAVIS #1……………….26 NW   @   11:17 P.M.
DAVIS #2 ………………25 NW   @   11:46 P.M.
RMY #1 (Instantaneous)…..27 NW   @   11:17 P.M.
RMY #2 (Instantaneous)…..27 NW   @   11:48 P.M.
MERLIN…………………34 NW
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………19 NW   @   11:21 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..19      @   11:21 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..19      @   11:18 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………19 NW   @   11:21 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………19 NNW  @   11:18 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..19 NW   @   11:21 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..19 NW   @   11:18 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………7.7 NW  [184 total miles] VECTOR #1……………….8.2
VECTOR #2……………….8.6
DAVIS #1………………..8.2 NW
DAVIS #2………………..8.2 NNW
RMY #1………………….8.0 NW
RMY #2………………….8.4 NW
RICHARDS (C5C)…………..OTS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….TRACE DEPARTURE…..-0.15
TOTAL PRECIPITATION FOR THE MONTH…………..3.24 DEPARTURE…..+0.48
TOTAL PRECIPITATION FOR THE YEAR (2025)……..5.59 DEPARTURE…..-1.67

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………TRACE DEPARTURE……-0.7
TOTAL SNOWFALL FOR THE MONTH……………….13.0 DEPARTURE……-0.2
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……34.0 DEPARTURE…..-12.9

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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/-2/0.00/0.0/634/100       50 NW  VEC1 50 NW  RMY 54
2/15   28/15/22/-6/0.29/3.3/108/17        20 ESE VEC1 20 ESE RMY 18
2/16   35/22/29/+1/1.66/1.6/000/00        45 W   VEC1 45 W   RMY 48
2/17   28/16/22/-7/T/T/597/93             70 WNW VEC1 68 WNW RMY 72
2/18   25/13/19/-10/0.00/0.0/645/100      51 WNW VEC1 52 WNW RMY 54
2/19   30/12/21/-8/0.00/0.0/635/98        33 WNW VEC1 33 WNW RMY 34
2/20   29/11/20/-9/T/T/…/..             26 NW  VEC1 27 NW  RMY 27

2/21 The low since midnight is 17F, the daily normal low is 21F.

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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 21
HIGH 70F IN 2018
LOW -6F IN 1950
PRECIP 2.42 INCHES IN 1898
SNOWFALL 9.0 INCHES IN 1929
PEAK GUST 72 MPH WNW IN 1967

RECORDS FOR FEBRUARY 22
HIGH 63F IN 1997
LOW -1F IN 1918
PRECIP 1.38 INCHES IN 1900
SNOWFALL 8.0 INCHES IN 1893
PEAK GUST 74 MPH S IN 1974

TODAY’S REPORT PREPARED BY: Amanda Joly