Thursday, February 20, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
THURSDAY, FEBRUARY 20, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0633E
SUNSET: 1723E
CONTINUED COLD, BUT WITH MUCH LESS WIND DESPITE A STORM SYSTEM
PASSING TO OUR SOUTHEAST….
We had a brief period of sunshine early this morning before low
level clouds overtook the sky from the east. Despite the surface
the wind (what little there is) being out of the north and north-
northwest, the wind a couple thousand feet up is out of the east
and east-northeast, as ocean effect clouds and even some very
light intermittent snow has been occurring since the mid morning
hours.
Temperatures started the day even colder than yesterday with a low
of 11F, however the mercury has recovered to the mid 20s by early
this afternoon. This is still more than 10F degrees below normal for
the date! The dew point has been on the rise as well thanks to
increasing moisture from the ocean effect. Readings have risen from
the mid single digits to the mid teens.
Winds are much lighter today than they have been all week. The
average speed for the day so far is only around 9mph, mainly out of
the north and north-northwest. The peak gust so far is 17mph, which
occurred around 2:55am.
Visibility was excellent early this morning with a view of around
80 miles, but it has decreased thereafter to around 50-60 miles by
early this afternoon, with much lower values at times to the
northeast and east due to the very light snow.
The maximum temperature for today is 26F degrees, which is 12 degrees
below the normal high of 38F. The minimum temperature since midnight
is 11F degrees, which is 9 degrees below the normal low of 20F.
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Today’s Observations:
7 A.M.
Weather: Scattered cirrus, few stratocumulus distant NE,
few altocumulus distant N-E, few cirrostratus distant E-S-SSW
Temperature: 12F; Dew Point: 4F; Relative Humidity: 70%
Wind: N @ 9 kts
Sea-level pressure: 1015.5 mb; 29.99 in. Hg: falling, then more slowly
Visibility: 80 miles
6-hr Max temp: 16F
6-hr Min temp: 11F
24-hr Precip: 0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 4 inches
BHO SA 1155 250 SCT 80 155/12/4/3509/999/ FEW SC DSNT NE FEW AC DSNT N-E
FEW CS DSNT E-S-SSW/ 8/555 4/004 56018 10016 20011
10 A.M.
Weather: Broken stratocumulus, broken cirrostratus, broken cirrus,
virga NE-E
Temperature: 21F; Dew Point: 8F; Relative Humidity: 57%
Wind: N @ 4 kts, wind light
Sea-level pressure: 1013.7 mb; 29.93 in. Hg: falling, then more rapidly
Visibility: 60 miles, 15 miles NE-E
3-hr Precip: Trace
3-hr Snowfall: Trace
BHO SA 1455 E19 BKN 200 BKN 250 BKN 60 137/21/8/3504/993/ VIRGA NE-E
S-B33E50 VSBY 15 NE-E TOTAL NEW SNW PST 3 HRS TRACE/ 8/505 58018 6000/
1 P.M.
Weather: Overcast stratocumulus, intermmitent very light snow
Temperature: 26F; Dew Point: 17F; Relative Humidity: 68%
Wind: N @ 6 kts, wind light
Sea-level pressure: 1010.9 mb; 29.85 in. Hg: falling, then more rapidly
Visibility: 60 miles, 30 miles NE, 15 miles E
6-hr Max temp: 26F
6-hr Min temp: 12F
6-hr Precip: Trace
6-hr Snowfall: Trace
Snow Depth: 4 inches
BHO SA 1755 E20 OVC 60S- 109/26/17/3506/985/ PCPN VRY LGT S- INTMT
VSBY 30 NE 15 E WND LGT TOTAL NEW SNW PST 6 HRS TRACE/ 8/5// 4/004
58028 6000/ 10026 20012
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SUMMARY FOR WEDNESDAY, FEBRUARY 19, 2025
TEMPERATURE (DEGREES F)
MAX…….30 NORMAL…..38
MIN…….12 NORMAL…..20
MEAN……21 NORMAL…..29
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..-8
TOTAL DEPARTURE FOR THE MONTH…………………….-44 [-2.5 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………44 DEPARTURE……..+8
TOTAL HEATING UNITS FOR THE MONTH…………..759 DEPARTURE…….+44
TOTAL HEATING UNITS FOR THE SEASON…………3902 DEPARTURE……-216
TOTAL HEATING UNITS LAST SEASON TO DATE…….3577 DEPARTURE……+325
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)………..33 WNW @ 09:09 A.M.
VECTOR #1 (1-Sec)……….33 WNW @ 09:09 A.M.
VECTOR #2 (1-Sec)……….38 W @ 09:09 A.M.
DAVIS #1……………….33 W @ 12:37 A.M.
DAVIS #2 ………………35 WNW @ 09:09 A.M.
RMY #1 (Instantaneous)…..34 WNW @ 03:14 A.M.
RMY #2 (Instantaneous)…..38 W @ 09:09 A.M.
MERLIN…………………31 NW
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………23 WNW @ 09:11 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..22 @ 08:50 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..24 @ 08:51 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………24 W @ 08:50 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………24 WNW @ 08:50 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..21 NW @ 06:20 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..24 WSW @ 08:51 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..13.3 WNW [318 total miles]
VECTOR #1………………13.0
VECTOR #2………………14.3
DAVIS #1……………….13.6 WNW
DAVIS #2……………….14.0 NW
RMY #1…………………12.4 WNW
RMY #2…………………13.8 W
RICHARDS (C5C)…………..OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.15
TOTAL PRECIPITATION FOR THE MONTH…………..3.24 DEPARTURE…..+0.63
TOTAL PRECIPITATION FOR THE YEAR (2025)……..5.59 DEPARTURE…..-1.52
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.6
TOTAL SNOWFALL FOR THE MONTH……………….13.0 DEPARTURE……+0.5
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……34.0 DEPARTURE…..-12.2
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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 The low since midnight is 11F, the daily normal low is 20F.
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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 20
HIGH 68F IN 2018
LOW -4F IN 1966
PRECIP 1.90 INCHES IN 1934
SNOWFALL 15.0 INCHES IN 1921,1934
PEAK GUST 78 MPH NW IN 1972
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
TODAY’S REPORT PREPARED BY: Matt Douglas
