Wednesday, April 16, 2025

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

WEDNESDAY, APRIL 16, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0501E
SUNSET:  1827E

MORE CLOUDS THAN SUN WITH A BRISK WIND AND CHILLY TEMPERATURES….

Skies have been dominated by cloud cover again today as a cold
pool of air aloft sits over the region. What little bit of sun we
get becomes self destructive allowing more low level clouds to
develop. A brief very light rain shower also moved through during
the mid morning hours, but only brought a trace of rain. All in
all it’s been a dry day, albeit on the chilly side.

Temperatures are below average for today, at least in terms of
maximum temperature so far. Readings have only made it to the
upper 40s early this afternoon, which is about 8 degrees below
seasonal levels. Dew point values are on the lower side only
gradually rising from the mid 20s to around 30F. Of this the
dry air is also adding to the chilly feel.

Winds have been busy out of mainly a westerly direction. The
average speed for the day so far is around 19mph. The peak gust
for the day so far is 44mph, which occurred before 3am this
morning.

Visibility has been excellent today with a view of 70-80 miles
throughout the day.

The maximum temperature for today is 49F degrees, which is 8
degrees below the normal high of 57F. The minimum temperature
since midnight is 38F degrees, which is equal to the normal low
of 38F.

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Today’s Observations:

7 A.M.
Weather: Scattered altocumulus/altostratus, scattered cirrus,
few stratocumulus all quadrants
Temperature: 41F; Dew Point: 27F; Relative Humidity: 57%
Wind: W @ 19G31 kts, peak wind W 36mph at 6:53 A.M.
Sea-level pressure: 1000.9 mb; 29.56 in. Hg: rising, then more rapidly
Visibility: 70 miles
6-hr Max temp: 42F
6-hr Min temp: 38F
24-hr Precip:  0.04 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 85 SCT 250 SCT 70 009/41/27/2819G31/956/ FEW SC ALQDS
PK WND 2731/53/ 8/574 53011 70004 10042 20038

10 A.M.
Weather: Overcast stratocumulus, few breaks in overcast all quadrants
Temperature: 45F; Dew Point: 28F; Relative Humidity: 52%
Wind: W @ 19G30 kts, peak wind W 35mph at 9:46 A.M.
Sea-level pressure: 1001.5 mb; 29.57 in. Hg: rising, then falling
Visibility: 70 miles
3-hr Precip:  Trace
3-hr Snowfall: 0.0 inches
BHO SA 1455 E49 OVC 70 015/45/28/2819G30/957/ FEW BINOVC ALQDS
HIER CLDS VSBL N PK WND 2830/46/ 8/5// 50006 6000/

1 P.M.
Weather: Broken stratocumulus
Temperature: 48F Dew Point: 30F; Relative Humidity: 50%
Wind: WNW @ 17G34 kts, peak wind W 39mph at 12:54 P.M.
Sea-level pressure: 1002.0 mb; 29.59 in. Hg: rising, then falling
Visibility: 80 miles
6-hr Max temp: 49F
6-hr Min temp: 41F
6-hr Precip:  Trace
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 E45 BKN 80 020/48/30/2917G34/959/ PK WND 2834/54/
8/500 50005 6000/ 10049 20041

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SUMMARY FOR TUESDAY, APRIL 15, 2025

TEMPERATURE (DEGREES F)
MAX…….66   NORMAL…..56
MIN…….44   NORMAL…..38
MEAN……55   NORMAL…..47

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………+8
TOTAL DEPARTURE FOR THE MONTH……………………..-25 [-1.9 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY…………….10  DEPARTURE……..-8
TOTAL HEATING UNITS FOR THE MONTH……………340  DEPARTURE…….+23
TOTAL HEATING UNITS FOR THE SEASON………….5269  DEPARTURE……-395
TOTAL HEATING UNITS LAST SEASON TO DATE……..4924  DEPARTURE……+345

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)………..53 NW   @   04:51 P.M.
VECTOR #1 (1-Sec)……….51 NW   @   04:51 P.M.
VECTOR #2 (1-Sec)……….59 NW   @   04:52 P.M.
DAVIS #1……………….53 WNW  @   04:51 P.M.
DAVIS #2 ………………51 NW   @   04:52 P.M.
RMY #1 (Instantaneous)…..54 NW   @   04:51 P.M.
RMY #2 (Instantaneous)…..60 NW   @   04:52 P.M.
MERLIN…………………49 NW
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………36 NW   @   04:55 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..35      @   04:53 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..37      @   04:51 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………37 NW   @   04:53 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………36 NW   @   04:51 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..34 NW   @   04:53 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..35 NW   @   04:51 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..12.9 SSW [309 total miles] VECTOR #1………………13.1
VECTOR #2………………13.3
DAVIS #1……………….13.0 SW
DAVIS #2……………….13.4 SW
RMY #1…………………12.7 SW
RMY #2…………………13.3 SW
RICHARDS (C5C)…………..OTS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.04 DEPARTURE…..-0.12
TOTAL PRECIPITATION FOR THE MONTH…………..2.62 DEPARTURE…..+0.04
TOTAL PRECIPITATION FOR THE YEAR (2025)…….13.33 DEPARTURE…..-3.27

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.1
TOTAL SNOWFALL FOR THE MONTH………………..1.7 DEPARTURE……-0.5
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……35.8 DEPARTURE…..-33.3

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PRELIMINARY CLIMATE SUMMARY FOR APRIL 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

4/1    55/32/44/+3/0.17/0.0/512/67       38 NW  VEC1 38 NW  RMY 40
4/2    42/27/35/-6/0.11/T/584/76         29 NNW VEC1 28 NNW RMY 29
4/3    62/32/47/+5/0.31/0.0/000/00       38 SW  VEC1 38 SW  RMY 39
4/4    69/47/58/+16/0.00/0.0/456/59      31 NW  VEC1 31 NW  RMY 30
4/5    47/36/42/-1/0.49/0.0/000/00       25 ESE VEC1 29 SE  RMY 25
4/6    51/37/44/+1/0.20/0.0/016/02       22 NNW VEC1 21 NNW RMY 21
4/7    45/34/40/-4/0.18/T/000/00         24 E   VEC1 23 NNE RMY 23
4/8    40/26/33/-11/0.10/0.1/196/25      51 W   VEC1 48 W   RMY 51
4/9    46/24/35/-9/0.00/0.0/755/96       36 WNW VEC1 33 NW  RMY 36
4/10   49/29/39/-6/0.01/0.0/569/72       23 SSW VEC1 23 SSW RMY 25
4/11   45/31/38/-7/0.39/1.2/024/03       25 ENE VEC1 27 ENE RMY 26
4/12   36/33/35/-11/0.46/0.4/000/00      39 ENE VEC1 40 E   RMY 42
4/13   42/35/39/-7/0.16/0.0/000/00       38 NE  VEC1 38 NE  RMY 40
4/14   67/35/51/+4/0.00/0.0/…/..       29 WNW VEC1 29 NNW RMY 28
4/15   66/44/55/+8/0.04/0.0/…/..       53 NW  VEC1 51 NW  RMY 54 TSTM

4/16 The low since midnight is 38F, the daily normal low is 38F.

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APRIL 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 APRIL 16
HIGH 89 IN 2012
LOW 23 IN 1943
PRECIP 2.63 IN. IN 2018
SNOWFALL 3.6 IN. IN 2021
PEAK GUST 73 MPH E IN 2007

RECORDS FOR APRIL 17
HIGH 93 IN 2002
LOW 21 IN 1908
PRECIP 1.68 IN 1954
SNOWFALL 1.0 IN. IN 1899
PEAK GUST 63 MPH ESE IN 2011

TODAY’S REPORT PREPARED BY: MFD