Thursday, April 24, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
THURSDAY, APRIL 24, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0449E
SUNSET: 1836E
ANOTHER VERY FINE SPRING DAY HERE AT BLUE HILL….
Other than a period of mid level clouds that pushed through
during the morning hours, today has featured plenty of
sunshine, pleasant temperatures, and dry comfortable air.
We have definitely lucked out this week weather-wise,
especially considering how nasty April can be here near the
coast.
Temperatures have once again warmed into the low 70s early
this afternoon, which is 10 or more degrees above normal levels
for this time of year. Dew point values have been gradually
rising from the mid 30s to the low 40s through the course of
the day so far, indicating a more moist (humid) air mass
approaching the region.
The wind started off on the brisk side, mainly during the first
few hours of the day (wee hours) when it was gusty out of
the east and east-northeast. Since about 6am, it has been much
lighter, while also gradually veering toward the south and south-
southwest. The average speed for the day so far is around 9mph,
however it’s been closer to 5-6mph for the past few hours. The
peak gust occurred just before 2am with a value of 29mph.
Visibility has been excellent all day, starting at around 70
this morning, but dropping to around 60 miles by early this
afternoon.
The maximum temperature for today is 72F degrees, which is 12
degrees above the normal high of 60F. The minimum temperature
since midnight is 45F degrees, which is 4 degrees above the
normal low of 41F.
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Today’s Observations:
7 A.M.
Weather: Scattered altocumulus, thin scattered cirrus
Temperature: 54F; Dew Point: 35F; Relative Humidity: 50%
Wind: E @ 7 kts
Sea-level pressure: 1027.7 mb; 30.35 in. Hg: rising, then more slowly
Visibility: 70 miles
6-hr Max temp: 54F
6-hr Min temp: 45F
24-hr Precip: 0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 150 SCT 250 -SCT 70 277/54/35/1007/035/ 8/051 51015
10054 20045
10 A.M.
Weather: Broken altocumulus/castellanus, virga distant E-S-W
Temperature: 62F; Dew Point: 38F; Relative Humidity: 41%
Wind: S @ 4 kts, wind light
Sea-level pressure: 1027.6 mb; 30.35 in. Hg: rising, then falling
Visibility: 70 miles
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 E120 BKN 70 276/62/38/1704/035/ VIRGA DSNT E-S-W
WND LGT/ 8/080 58001
1 P.M.
Weather: Clear, few altocumulus castellanus SE-SW-NW, few cirrus
distant NNW-NNE
Temperature: 71F Dew Point: 42F; Relative Humidity: 35%
Wind: S @ 5 kts, wind light
Sea-level pressure: 1025.3 mb; 30.28 in. Hg: falling, then more rapidly
Visibility: 60 miles
6-hr Max temp: 71F
6-hr Min temp: 54F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 CLR 60 253/71/42/1805/028/ FEW ACC SE-SW-NW FEW CI DSNT
NNW-NNE WND LGT/ 8/081 58023 10070 20054
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SUMMARY FOR WEDNESDAY, APRIL 23, 2025
TEMPERATURE (DEGREES F)
MAX…….72 NORMAL…..60
MIN…….43 NORMAL…..41
MEAN……58 NORMAL…..50
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+8
TOTAL DEPARTURE FOR THE MONTH………………………+18 [+0.6 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………..7 DEPARTURE……..-8
TOTAL HEATING UNITS FOR THE MONTH……………428 DEPARTURE…….-19
TOTAL HEATING UNITS FOR THE SEASON………….5357 DEPARTURE……-436
TOTAL HEATING UNITS LAST SEASON TO DATE……..5056 DEPARTURE……+301
COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025)
TOTAL COOLING UNITS FOR YESTERDAY……………..0 DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH……………..2 DEPARTURE……..+1
TOTAL COOLING UNITS FOR THE SEASON…………….2 DEPARTURE……..+1
TOTAL COOLING UNITS LAST SEASON TO DATE………..0 DEPARTURE……..+2
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)………..24 NW @ 03:40 P.M.
VECTOR #1 (1-Sec)……….23 NW @ 06:14 A.M.
VECTOR #2 (1-Sec)……….27 NNW @ 02:01 P.M.
DAVIS #1……………….23 W @ 02:01 P.M.
DAVIS #2 ………………24 NW @ 02:01 P.M.
RMY #1 (Instantaneous)…..26 NW @ 03:40 P.M.
RMY #2 (Instantaneous)…..26 WNW @ 02:01 P.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………19 NW @ 06:02 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..17 @ 02:03 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..19 @ 01:00 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………17 WNW @ 02:03 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………19 WNW @ 02:03 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..16 NW @ 06:02 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..19 WNW @ 02:03 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..10.0 NW [239 total miles]
VECTOR #1………………10.0
VECTOR #2………………10.5
DAVIS #1……………….10.2 NW
DAVIS #2……………….10.2 NNW
RMY #1………………….9.7 NW
RMY #2…………………10.2 NW
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…………..2.88 DEPARTURE…..-0.88
TOTAL PRECIPITATION FOR THE YEAR (2025)…….13.59 DEPARTURE…..-4.19
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE…….0.0
TOTAL SNOWFALL FOR THE MONTH………………..1.7 DEPARTURE……-1.0
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……35.8 DEPARTURE…..-33.8
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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/+4/0.00/0.0/745/93 29 WNW VEC1 29 NNW RMY 28
4/15 66/44/55/+8/0.04/0.0/209/26 53 NW VEC1 51 NW RMY 54 TSTM
4/16 51/37/44/-3/T/0.0/484/60 44 WNW VEC1 43 WNW RMY 47
4/17 59/35/47/-1/0.00/0.0/800/99 35 WNW VEC1 34 WNW RMY 34
4/18 66/38/54/+4/0.00/0.0/617/76 41 SSW VEC1 42 SSW RMY 43
4/19 82/52/67/+18/T/0.0/383/47 40 WNW VEC1 40 W RMY 40
4/20 67/45/56/+7/0.00/0.0/768/94 53 NW VEC1 54 NW RMY 56
4/21 63/37/50/0/0.00/0.0/566/69 30 SSW VEC1 28 SSW RMY 31
4/22 75/44/60/+10/0.26/0.0/452/55 30 SSW VEC1 30 SSW RMY 30
4/23 72/43/58/+8/0.00/0.0/792/96 24 NW VEC1 23 NW RMY 26
4/24 The low since midnight is 45F, the daily normal low is 41F.
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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 24
HIGH 82 IN 2001
LOW 22 IN 1930
PRECIP 2.51 INS IN 1898
SNOWFALL 1.2 INS IN 1967
PEAK GUST 59 MPH NW IN 1962
RECORDS FOR APRIL 25
HIGH 83 IN 2009
LOW 24 IN 1892
PRECIP 1.38 IN. IN 1901
SNOWFALL 0.7 IN. IN 2002
PEAK GUST 66 MPH SE IN 1968
TODAY’S REPORT PREPARED BY: MFD
