Thursday, April 10, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
THURSDAY, APRIL 10, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0511E
SUNSET: 1821E
MAINLY SUNNY AND PLEASANT DESPITE TEMPERATURES STILL BELOW NORMAL….
Sunshine has been the theme so far today, however mid and high
level clouds are starting to increase in both coverage and thickness
as we move through the early afternoon hours. I hope everyone is
enjoying today, because more poor weather is on the way starting
tonight, and likely through the weekend (yet again!).
Temperatures are still below seasonal averages, but with the sun
and lighter wind today, it’s still rather pleasant out there.
Readings once again started the day in the 20s, but has risen
nicely into the upper 40s (we should be in the mid 50s at this
time of year). Dew point values remain on the lower side, but
have risen a bit from yesterday’s low readings. Today they’ve
been gradually rising through the 20s.
Winds are much more tolerable today. They have gradually veered
from the west around midnight to variable easterly directions by
late this morning and early this afternoon. The average speed for
the day so far is around 7mph. The peak gust thus far is 18mph,
which occurred right around 11:40am, and again just after noon.
Visibility is excellent today with the view starting at around
70 miles, then slipping a bit early this afternoon to around 60
miles.
The maximum temperature for today is 49F degrees, which is 5 degrees
below the normal high of 54F. The minimum temperature since midnight
is 29F degrees, which is 7 degrees below the normal low of 36F.
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Today’s Observations:
7 A.M.
Weather: Thin scattered cirrus, few altocumulus distant S-SW
Temperature: 36F; Dew Point: 19F; Relative Humidity: 49%
Wind: NE @ 5 kts, wind light
Sea-level pressure: 1030.5 mb; 30.43 in. Hg: rising, then more rapidly
Visibility: 70 miles
6-hr Max temp: 36F
6-hr Min temp: 29F
24-hr Precip: 0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 250 -SCT 70 305/36/19/0505/043/ FEW AC DSNT S-SW WND LGT/
8/051 53013 10036 20029
10 A.M.
Weather: Thin scattered cirrus, few stratocumulus distant SE-SSE,
few cirrostratus distant SW-NW
Temperature: 44F; Dew Point: 23F; Relative Humidity: 43%
Wind: E @ 5 kts, wind light and variable
Sea-level pressure: 1030.1 mb; 30.42 in. Hg: rising, then falling
Visibility: 70 miles
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 250 -SCT 70 301/44/23/1005/042/ FEW SC DSNT SE-SSE
FEW CS DSNT SW-NW WND L/V/ 8/505 58004
1 P.M.
Weather: Broken altocumulus, broken altostratus, broken cirrus,
few stratocumulus distant SE-SW-W
Temperature: 45F Dew Point: 28F; Relative Humidity: 51%
Wind: NE @ 8G14 kts
Sea-level pressure: 1028.2 mb; 30.36 in. Hg: falling, then more slowly
Visibility: 60 miles
6-hr Max temp: 49F
6-hr Min temp: 36F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 E85 BKN E150 BKN 250 BKN 60 282/45/28/0508G14/036/
FEW SC DSNT SE-SW-W/ 8/574 56019 10049 20036
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SUMMARY FOR WEDNESDAY, APRIL 9, 2025
TEMPERATURE (DEGREES F)
MAX…….46 NORMAL…..53
MIN…….24 NORMAL…..35
MEAN……35 NORMAL…..44
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..-9
TOTAL DEPARTURE FOR THE MONTH……………………..-6 [-0.9 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY…………….30 DEPARTURE……..+9
TOTAL HEATING UNITS FOR THE MONTH……………207 DEPARTURE……..+5
TOTAL HEATING UNITS FOR THE SEASON………….5136 DEPARTURE……-413
TOTAL HEATING UNITS LAST SEASON TO DATE……..4845 DEPARTURE……+291
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)………..36 WNW @ 06:42 A.M.
VECTOR #1 (1-Sec)……….33 NW @ 07:56 A.M.
VECTOR #2 (1-Sec)……….37 WNW @ 06:41 A.M.
DAVIS #1……………….34 W @ 06:41 A.M.
DAVIS #2 ………………36 WNW @ 06:41 A.M.
RMY #1 (Instantaneous)…..36 NW @ 07:56 A.M.
RMY #2 (Instantaneous)…..37 WNW @ 06:41 A.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………25 NW @ 08:32 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..24 @ 08:32 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..26 @ 06:42 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………25 WNW @ 06:42 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………25 NW @ 06:42 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..24 NW @ 08:32 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..25 WNW @ 06:42 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..11.3 WNW [271 total miles]
VECTOR #1………………11.3
VECTOR #2………………12.1
DAVIS #1……………….11.7 WNW
DAVIS #2……………….11.9 WNW
RMY #1…………………10.9 WNW
RMY #2…………………11.8 W
RICHARDS (C5C)…………..OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.18
TOTAL PRECIPITATION FOR THE MONTH…………..1.56 DEPARTURE…..+0.03
TOTAL PRECIPITATION FOR THE YEAR (2025)…….12.27 DEPARTURE…..-3.28
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.1
TOTAL SNOWFALL FOR THE MONTH………………..0.1 DEPARTURE……-1.4
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……34.2 DEPARTURE…..-34.2
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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 The low since midnight is 29F, the daily normal low is 36F.
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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 10
HIGH 83 IN 1922
LOW 20 IN 1985
PRECIP 2.40 IN. IN 1935
SNOWFALL 10.1 IN. IN 1996
PEAK GUST 66 MPH WNW IN 1967
RECORDS FOR APRIL 11
HIGH 85 IN 2017
LOW 19 IN 1909
PRECIP 1.72 IN. IN 2003
SNOWFALL 9.5 IN. IN 1958
PEAK GUST 65 MPH NW IN 1963
TODAY’S REPORT PREPARED BY: Matt Douglas
