Monday, March 31, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
MONDAY, MARCH 31, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0528E
SUNSET: 1809E
MORNING DENSE FOG, TURNING WARMER AND WINDY INTO THIS AFTERNOON….
A few rain showers moved through in the pre-dawn hours this morning
associated with a warm front that pushed through. Only 0.02″ of rain
was left behind by these light showers. More impactful was the dense
fog that persisted through the morning hours reducing visibility to
as low as 1/16th of a mile for a good chunk of the morning.
As we push into the early afternoon hours, the fog is lifting, but
overcast skies remain. As we get fully into the warm sector, both
the temperature and wind speeds have been heading upwards.
Temperatures steadily rose since midnight, but started to rise more
rapidly by the mid morning hours. Readings have reached the mid 50s
by early this afternoon. Likewise, the dew point has also been rising
in tandem with the air temperature, thus keeping the air mass pretty
saturated.
The wind, which spent most of yesterday on the light side, has been
increasing in speed through the morning out of the south-southwest. The
average speed for the day so far is around 14mph. Gusts have been
ramping up as well exceeding 30mph at times. The peak gust so far is
35mph, which occurred just before, and then again just after 10am this
morning.
As mentioned, visibility was quite limited this morning with the
dense fog keeping it under a 1/4 mile. However, as the fog lifted,
the view did improve to around 20 miles for a time, but has since
dropped back below 6 miles by the 1pm observation as the ceiling
lowers again and fog redevelops.
The maximum temperature for today is 56F degrees, which is 7 degrees
above the normal high of 49F. The minimum temperature since midnight
is 38F degrees, which is 6 degrees above the normal low of 32F.
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Today’s Observations:
7 A.M.
Weather: Sky obscured, vertical visibility 200ft
Temperature: 49F; Dew Point: 49F; Relative Humidity: 100%
Wind: SSW @ 16G22 kts
Sea-level pressure: 1010.9 mb; 29.85 in. Hg: falling unsteadily
Visibility: 1/16 mile, fog
6-hr Max temp: 49F
6-hr Min temp: 39F
24-hr Precip: 0.02 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 X W2 1/16F 109/49/49/2016G22/985/ 8//// 57012 6002/ 70002
10049 20039
10 A.M.
Weather: Sky obscured, vertical visibility 200ft
Temperature: 52F; Dew Point: 52F; Relative Humidity: 100%
Wind: SSW @ 19G30 kts, peak wind SSW 35mph at 9:54 A.M.
Sea-level pressure: 1007.9 mb; 29.76 in. Hg: falling, then more rapidly
Visibility: 1/8 mile, fog
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 X W2 1/8F 079/55/55/2019G30/976/ PK WND 2030/54/ 8//// 58030
1 P.M.
Weather: Sky obscured, vertical visibility 300ft
Temperature: 55F Dew Point: 55F; Relative Humidity: 100%
Wind: SSW @ 15G26 kts, peak wind SSW 32mph at 12:16 P.M.
Sea-level pressure: 1006.4 mb; 29.72 in. Hg: falling, then more slowly
Visibility: 4 miles, 6 miles NE, fog
6-hr Max temp: 56F
6-hr Min temp: 49F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 X W3 4F 064/55/55/2015G26/972/ VSBY 6 NE PK WND 2128/16/
8//// 56015 10056 20049
————————————————————–
SUMMARY FOR SUNDAY, MARCH 30, 2025
TEMPERATURE (DEGREES F)
MAX…….42 NORMAL…..49
MIN…….32 NORMAL…..31
MEAN……37 NORMAL…..40
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..-3
TOTAL DEPARTURE FOR THE MONTH……………………+157 [+5.0 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY…………….28 DEPARTURE……..+3
TOTAL HEATING UNITS FOR THE MONTH……………731 DEPARTURE……-159
TOTAL HEATING UNITS FOR THE SEASON………….4912 DEPARTURE……-410
TOTAL HEATING UNITS LAST SEASON TO DATE……..4625 DEPARTURE……+287
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)………..23 E @ 09:15 A.M.
VECTOR #1 (1-Sec)……….23 ESE @ 09:43 A.M.
VECTOR #2 (1-Sec)……….22 E @ 00:03 A.M.
DAVIS #1……………….24 E @ 09:15 A.M.
DAVIS #2 ………………23 ESE @ 09:03 A.M.
RMY #1 (Instantaneous)…..23 E @ 09:14 A.M.
RMY #2 (Instantaneous)…..22 E @ 09:03 A.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………17 E @ 09:17 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..18 @ 09:16 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..16 @ 09:46 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………18 E @ 09:16 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………16 ESE @ 09:46 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..17 ESE @ 09:16 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..16 ESE @ 09:46 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………6.1 E [147 total miles]
VECTOR #1……………….6.5
VECTOR #2……………….6.7
DAVIS #1………………..6.9 E
DAVIS #2………………..6.5 ESE
RMY #1………………….6.7 E
RMY #2………………….6.6 E
RICHARDS (C5C)…………..OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.02 DEPARTURE…..-0.15
TOTAL PRECIPITATION FOR THE MONTH…………..4.71 DEPARTURE…..-0.64
TOTAL PRECIPITATION FOR THE YEAR (2025)…….10.36 DEPARTURE…..-3.49
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.2
TOTAL SNOWFALL FOR THE MONTH………………TRACE DEPARTURE…..-14.7
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……34.1 DEPARTURE…..-32.5
————————————————————–
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 The low since midnight is 38F, 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 MARCH 31
HIGH 89 IN 1998 [RECORD HIGH FOR MONTH]
LOW 16 IN 1923
PRECIP 2.89 IN 1987
SNOWFALL 15.0 IN 1997
PEAK GUST 81 MPH SSE IN 1987
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
TODAY’S REPORT PREPARED BY: Matt Douglas
