Sunday, February 23, 2025

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

SUNDAY, FEBRUARY 23, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0628E
SUNSET:  1727E

FINALLY TURNING MILDER AS THE OVERALL WEATHER PATTERN SHIFTS A BIT….

We started the day with a lot of clouds and some virga, but no precip
ever reached the ground here at Blue Hill despite showing up on radar
for a time. Sunshine increased as we pushed into the late morning hours
with plenty of sun being observed early this afternoon, although
another batch of mid levels clouds have moved in just in time for the
1pm observation filtering the sunshine for the time being.

Temperatures are responding nicely with readings approaching 40F
degrees by early this afternoon. We should finally be able to start
some decent melting of the remaining snow and ice on the ground. Dew
point values have generally been around 20F most of the day.

Winds have been fairly steady through the day, becoming gusty at times
thanks to some mixing from aloft. The average speed for the day so far
is around 12mph. Gusts have been getting to 25-30mph at times, with a
peak gust of 30mph so far for the day, occurring at 11:43am.

Visibility started the day limited by haziness, with only around a 30
mile view. It gradually increased during the morning into early this
afternoon with 50-60 miles of visibility by the 1pm observation.

The maximum temperature for today is 40F degrees, which is 1 degree
above the normal high of 39F. The minimum temperature since midnight
is 25F degrees, which is 4 degrees above the normal low of 21F.

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Today’s Observations:

7 A.M.
Weather: Broken altostratus, overcast cirrus, virga all quadrants
Temperature: 28F; Dew Point: 19F; Relative Humidity: 71%
Wind: WSW @ 8 kts
Sea-level pressure: 1017.5 mb; 30.05 in. Hg: rising, then more rapidly
Visibility: 30 miles, hazy
6-hr Max temp: 18F
6-hr Min temp: 13F
24-hr Precip:  0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 4 inches
BHO SA 1155 E85 BKN 250 OVC 30 175/28/19/2508/005/ VIRGA ALQDS HAZY/
8/011 4/004 53004 10028 20025

10 A.M.
Weather: Overcast altocumulus/altostratus, few breaks in overcast all
quadrants, few stratocumulus distant W-N-NNE, virga all quadrants
Temperature: 33F; Dew Point: 20F; Relative Humidity: 57%
Wind: W @ 11G22 kts
Sea-level pressure: 1017.1 mb; 30.03 in. Hg: rising, then falling
Visibility: 40 miles, hazy
3-hr Precip:  0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 E150 OVC 40 171/33/20/2811G22/003/ FEW BINOVC ALQDS
FEW SC DSNT W-N-NNE VIRGA ALQDS HAZY/ 8/57/ 58004

1 P.M.
Weather: Broken altocumulus/altostratus
Temperature: 39F; Dew Point: 22F; Relative Humidity: 49%
Wind: WNW @ 12G19 kts
Sea-level pressure: 1016.1 mb; 30.01 in. Hg: falling, then more rapidly
Visibility: 60 miles
6-hr Max temp: 40F
6-hr Min temp: 28F
6-hr Precip:  0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 4 inches
BHO SA 1755 E120 BKN 60 161/39/22/2912G19/001/ 8/070 4/004 58010
10040 20028

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SUMMARY FOR SATURDAY, FEBRUARY 22, 2025

TEMPERATURE (DEGREES F)
MAX…….35   NORMAL…..38
MIN…….13   NORMAL…..21
MEAN……24   NORMAL…..30

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..-6
TOTAL DEPARTURE FOR THE MONTH…………………….-63 [-3.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY…………….41  DEPARTURE……..+6
TOTAL HEATING UNITS FOR THE MONTH……………885  DEPARTURE…….+63
TOTAL HEATING UNITS FOR THE SEaASON…………4028  DEPARTURE……-197
TOTAL HEATING UNITS LAST SEASON TO DATE……..3681  DEPARTURE……+347

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)………..30 NW   @   08:57 A.M.
VECTOR #1 (1-Sec)……….30 NW   @   08:57 A.M.
VECTOR #2 (1-Sec)……….34 WSW  @   05:12 A.M.
DAVIS #1……………….30 NW   @   08:57 A.M.
DAVIS #2 ………………30 NW   @   05:12 A.M.
RMY #1 (Instantaneous)…..33 WNW  @   07:13 A.M.
RMY #2 (Instantaneous)…..33 WSW  @   05:12 A.M.
MERLIN…………………30 NW
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………22 WNW  @   05:18 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..21      @   05:14 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..25      @   05:14 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………22 WNW  @   05:14 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………25 WNW  @   05:14 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..21 WNW  @   05:18 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..24 WSW  @   05:14 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..12.4 WNW [298 total miles] VECTOR #1………………12.3
VECTOR #2………………13.3
DAVIS #1……………….12.5 W
DAVIS #2……………….13.0 WNW
RMY #1…………………12.0 W
RMY #2…………………13.0 WSW
RICHARDS (C5C)…………..OTS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.16
TOTAL PRECIPITATION FOR THE MONTH…………..3.24 DEPARTURE…..+0.18
TOTAL PRECIPITATION FOR THE YEAR (2025)……..5.59 DEPARTURE…..-1.97

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……-1.5
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……34.0 DEPARTURE…..-14.2

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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 TSTM
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   33/17/25/-4/0.00/0.0/…/..        38 NW  VEC1 39 NW  RMY 40
2/22   35/13/24/-6/0.00/0.0/…/..        30 NW  VEC1 30 NW  RMY 33

2/23 The low since midnight is 25F, 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 23
HIGH 67F IN 2017, 2022
LOW -8F IN 1907
PRECIP 1.48 INCHES IN 1967
SNOWFALL 10.6 INCHES IN 1967
PEAK GUST 73 MPH WNW IN 1974

RECORDS FOR FEBRUARY 24
HIGH 71F IN 2017 [RECORD HIGH FOR MONTH] LOW -11F IN 1894
PRECIP 3.10 INCHES IN 1969
SNOWFALL 27.4 INCHES IN 1969 [HIGHEST CALENDAR DAY AMOUNT ON RECORD] PEAK GUST 63 MPH NE IN 1998

TODAY’S REPORT PREPARED BY: Matt Douglas