Tuesday, April 1, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
TUESDAY, APRIL 1, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0526E
SUNSET: 1810E
COLD FRONT BRINGS RAINFALL OVERNIGHT, A DRIER AND COOLER DAY TODAY….
Rainfall associated with a cold front that pushed through overnight
and early this morning brought a decent dose of moisture to the area.
0.52″ of rain was measured through 7am this morning. Conditions has
improved markedly since early this morning with the clouds moving out
leaving us with plenty of sunshine.
Despite the sun, decent cold air advection, which initially sent
readings from the mid 50s during the wee hours of the morning down to
the low 40s by 7am. Values have been slow to recover through this
morning into early this afternoon, but have reached the low 50s once
again. Dew point values have been falling off gradually as well, from
the mid 50s during the wee hours to the upper 20s by early this
afternoon.
Winds are busy today once again thanks to the cold air advection. A
northwest to north-northwesterly flow has been averaging at around
15mph for the day so far. Gusts have been ramping up as well exceeding
30mph at times. The peak gust so far is 38mph, which occurred just
before the 10am observation.
Visibility has been excellent today, averaging at around 70-80 miles
all day.
The maximum temperature for today is 55F degrees, which is 5 degrees
above the normal high of 50F. The minimum temperature since midnight
is 42F degrees, which is 10 degrees above the normal low of 32F.
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PRELIMINARY STATS FOR MARCH 2025
TEMPERATURE, Deg. F
Avg. Max. 50.1 [+6.0]
Avg. Min. 31.1 [+4.2]
Mean 40.6 [+5.1]
24-hour corrected mean: 40.2
Max. for month: 67F on the 16th
Min. for month: 8F on the 3rd
HEATING DEGREE DAYS
Total heating units: 748 [-167]
Total for the season: 4929 [-418]
Total for last season: 4641
COOLING DEGREE DAYS
Total cooling units: 0 [ 000]
Total for the season: 0 [ 000]
Total for last season: 0
PRECIPITATION, Inches
Total: 5.06 [-0.46]
Greatest in 24 hrs: 2.17 on the 16th-17th
SNOWFALL, Inches
Total: Trace [-15.0]
Greatest in 24 hrs: T on the 1st, 6th, 7th, 12th
WIND, mph
Avg. uncorrected wind speed: 13.6 mph
Avg. corrected wind speed: 14.0 mph
Prevailing wind direction: West-Northwest [19%]
Peak gust and direction: 69 S on the 6th
SUNSHINE:
Campbell-Stokes card minutes: 11124 of a possible 21516, or 52%
Astronomical total minutes: 11500 of a possible 22267 or 52%
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Today’s Observations:
7 A.M.
Weather: Broken stratocumulus, overcast altostratus, few breaks in
overcast distant WSW-NW-NE, higher clouds visible distant WNW-NW-NE
Temperature: 43F; Dew Point: 39F; Relative Humidity: 85%
Wind: NNW @ 15G28 kts, peak wind NNW 32mph at 6:49 A.M.
Sea-level pressure: 1005.0 mb; 29.68 in. Hg: rising, then more slowly
Visibility: 70 miles
6-hr Max temp: 55F
6-hr Min temp: 42F
24-hr Precip: 0.52 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 E25 BKN 80 OVC 70 050/43/39/3315G28/968/ FEW BINOVC DSNT
WSW-NW-NE HIER CLDS VSBL DSNT WSW-NW-NE PK WND 3328/49/ 8/52/ 51037
6007/ 70052 10055 20042
10 A.M.
Weather: Clear, few stratocumulus all quadrants, few altocumulus/castellanus
distant NE-SE-SSW, few cirrostratus distant NE-SE, few cirrus distant W-N
Temperature: 45F; Dew Point: 31F; Relative Humidity: 55%
Wind: NNW @ 20G33 kts, peak wind NW 38mph at 9:51 A.M.
Sea-level pressure: 1009.6 mb; 29.81 in. Hg: rising, then more rapidly
Visibility: 70 miles
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 CLR 70 096/45/31/3320G33/981/ FEW SC ALQDS FEW AC/ACC DSNT
NE-SE-SSW FEW CS DSNT NE-SE FEW CI DSNT W-N PK WND 3233/51/ 8/588 53046
1 P.M.
Weather: Thin broken cirrus, few stratocumulus distant SSW-W-N
Temperature: 50F Dew Point: 29F; Relative Humidity: 44%
Wind: NW @ 15G23 kts
Sea-level pressure: 1012.2 mb; 29.89 in. Hg: rising, then more rapidly
Visibility: 80 miles
6-hr Max temp: 52F
6-hr Min temp: 42F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 250 -SCT 80 122/50/29/3115G23/989/ FEW SC DSNT SSW-W-N/
8/501 53026 10052 20042
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SUMMARY FOR MONDAY, MARCH 31, 2025
TEMPERATURE (DEGREES F)
MAX…….57 NORMAL…..49
MIN…….38 NORMAL…..32
MEAN……48 NORMAL…..41
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+7
TOTAL DEPARTURE FOR THE MONTH……………………+164 [+5.1 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY…………….17 DEPARTURE……..-8
TOTAL HEATING UNITS FOR THE MONTH……………748 DEPARTURE……-167
TOTAL HEATING UNITS FOR THE SEASON………….4929 DEPARTURE……-418
TOTAL HEATING UNITS LAST SEASON TO DATE……..4641 DEPARTURE……+288
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)………..35 SSW @ 10:24 A.M.
VECTOR #1 (1-Sec)……….36 SSW @ 10:24 A.M.
VECTOR #2 (1-Sec)……….34 SSW @ 10:42 A.M.
DAVIS #1……………….41 S @ 10:24 A.M.
DAVIS #2 ………………40 S @ 10:04 A.M.
RMY #1 (Instantaneous)…..36 SSW @ 10:28 A.M.
RMY #2 (Instantaneous)…..36 SSW @ 10:42 A.M.
MERLIN…………………33 S
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………27 SSW @ 09:46 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..27 @ 10:24 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..27 @ 10:24 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………27 S @ 09:41 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………29 S @ 10:24 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..25 SSW @ 08:24 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..27 SSW @ 10:24 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..15.2 SSW [364 total miles]
VECTOR #1………………15.4
VECTOR #2………………15.6
DAVIS #1……………….15.1 SSW
DAVIS #2……………….15.8 SSW
RMY #1…………………15.1 SSW
RMY #2…………………15.9 S
RICHARDS (C5C)…………..OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.52 DEPARTURE…..+0.35
TOTAL PRECIPITATION FOR THE MONTH…………..5.06 DEPARTURE…..-0.46
TOTAL PRECIPITATION FOR THE YEAR (2025)…….10.88 DEPARTURE…..-3.14
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.3
TOTAL SNOWFALL FOR THE MONTH………………TRACE DEPARTURE…..-15.0
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……34.1 DEPARTURE…..-32.8
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PRELIMINARY CLIMATE SUMMARY FOR MARCH 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
3/1 50/21/36/+5/T/T/081/12 46 NW VEC1 46 NW RMY 49
3/2 28/14/21/-11/0.00/0.0/672/99 41 NW VEC1 42 NW RMY 43
3/3 31/8/20/-12/0.00/0.0/667/98 28 NW VEC1 28 NW RMY 31
3/4 48/23/36/+4/0.00/0.0/390/57 41 SW VEC1 42 SW RMY 43
3/5 54/41/48/+16/0.52/0.0/021/03 50 SSW VEC1 50 SSW RMY 55
3/6 55/32/44/+11/0.66/T/014/02 69 S VEC1 69 S RMY 68
3/7 41/25/33/0/T/T/638/92 60 WNW VEC1 61 WNW RMY 64
3/8 40/27/34/+1/0.00/0.0/619/89 55 W VEC1 55 W RMY 58
3/9 45/25/35/+2/0.00/0.0/544/78 40 W VEC1 39 W RMY 42
3/10 60/33/47/+13/0.00/0.0/680/97 38 WNW VEC1 38 WNW RMY 39
3/11 62/37/50/+16/0.00/0.0/676/96 39 SSW VEC1 40 SSW RMY 40
3/12 48/32/40/+6/T/T/544/77 29 N VEC1 29 N RMY 29
3/13 46/32/39/+5/0.00/0.0/483/68 25 ESE VEC1 26 ESE RMY 25
3/14 54/33/44/+9/0.00/0.0/570/80 22 SSW VEC1 22 SSW RMY 22
3/15 59/37/48/+13/0.00/0.0/358/50 28 S VEC1 28 S RMY 28
3/16 67/44/56/+21/0.05/0.0/136/19 56 SSW VEC1 58 SSW RMY 58
3/17 58/38/48/+12/2.12/0.0/000/00 60 SSW VEC1 60 SSW RMY 60
3/18 48/34/41/+5/0.00/0.0/362/50 31 NNW VEC1 31 NNW RMY 32
3/19 52/34/43/+7/0.00/0.0/662/91 18 NE VEC1 18 NE RMY 17
3/20 55/36/46/+9/0.03/0.0/044/06 30 S VEC1 30 S RMY 30
3/21 46/36/41/+4/0.36/0.0/220/30 48 NW VEC1 49 NW RMY 54
3/22 62/33/48/+11/T/0.0/545/74 53 WNW VEC1 52 WNW RMY 58
3/23 44/25/35/-3/0.00/0.0/694/94 39 WNW VEC1 39 NW RMY 40
3/24 43/31/37/-1/0.79/0.0/000/00 35 S VEC1 35 S RMY 36
3/25 53/33/43/+5/0.00/0.0/558/75 32 WSW VEC1 33 WSW RMY 34
3/26 51/36/44/+5/0.00/0.0/217/29 25 WNW VEC1 25 NW RMY 27
3/27 49/27/38/-1/0.00/0.0/638/85 30 WNW VEC1 30 W RMY 33
3/28 58/35/47/+8/0.00/0.0/467/62 38 WNW VEC1 37 WNW RMY 40
3/29 48/32/40/0/0.14/0.0/000/00 38 NNE VEC1 38 NNE RMY 39
3/30 42/32/37/-3/0.02/0.0/000/00 23 E VEC1 23 ESE RMY 23
3/31 57/38/48/+7/0.37/0.0/000/00 35 SSW VEC1 35 SSW RMY 36
4/1 The low since midnight is 42F, the daily normal low is 32F.
————————————————————–
MARCH DAILY RECORDS TO DATE
3/16 RECORD HIGH MINIMUM TEMP OF 44F;
OLD RECORD WAS 43F IN 1921, 1973
3/17 RECORD PRECIPITATION AMOUNT OF 2.12 INS;
OLD RECORD WAS 1.97 INS IN 1968
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DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR APRIL 1
HIGH 74 IN 1967
LOW 6 IN 1923 [RECORD FOR MONTH]
PRECIP 3.47 IN. IN 2004 [RECORD FOR MONTH]
SNOWFALL 15.0 IN. IN 1997 [RECORD FOR MONTH]
PEAK GUST 75 MPH SSW IN 1962
RECORDS FOR APRIL 2
HIGH 77 IN 1967
LOW 14 IN 1919
PRECIP 1.83 IN. IN 1970
SNOWFALL 6.5 IN. IN 1924
PEAK GUST 76 MPH SSW IN 1970
TODAY’S REPORT PREPARED BY: Matt Douglas
