Monday, March 24, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
MONDAY, MARCH 24, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0540E
SUNSET: 1801E
A CHILLY RAW DAY SO FAR WITH PERIODS OF RAIN AND A BRISK WIND….
Overcast skies have been the theme with light rain developing early
this morning. Periods of mainly light rain have continued into the
early afternoon hours with 0.13″ falling through 1pm. There has been
no signs of any frozen precipitation here on the summit, but we did
get a report of sleet in Hingham just before noon. Snow was also
reported in other areas to the north and west this morning.
The temperature made it to the mid 30s before the precipitation
arrived. It then slip back a bit to around 33F for a time before
recovering to the upper 30s early this afternoon. Either way, with
the damp weather out there, it feels quite raw. This is in stark
contrast to the low 60s we enjoyed just 2 days ago!
Winds have been gradually increasing out of mainly a southerly
direction. The average speed for the day so far is around 13mph.
Gusts have been occasionally exceeding 30mph through the mid to
late morning, and into the early afternoon hours. The peak gust so
far is 35mph, which occurred at 9:46am.
Visibility has been limited most of the day thanks to increasing
moisture in the air. The view started at around 40 miles early
this morning, but has now decreased to generally under 3 miles
by early this afternoon. With stratus fractus clouds drifting
over the summit, the visibility has become quite variable, dipping
as low as 1/8th of a mile at times.
The maximum temperature for today is 39F degrees, which is 8 degrees
below the normal high of 47F. The minimum temperature since midnight
is 31F degrees, which is 2 degrees above the normal low of 29F.
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Today’s Observations:
7 A.M.
Weather: Overcast altocumulus/altostratus, few breaks in overcast
distant ESE
Temperature: 34F; Dew Point: 26F; Relative Humidity: 71%
Wind: SSE @ 11G18 kts
Sea-level pressure: 1018.8 mb; 30.09 in. Hg: rising, then falling
Visibility: 40 miles
6-hr Max temp: 34F
6-hr Min temp: 31F
24-hr Precip: 0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 E70 OVC 40 188/34/26/1511G18/009/ FEW BINOVC DSNT ESE/
8/07/ 58020 10034 20031
10 A.M.
Weather: Broken stratocumulus, overcast nimbostratus, light rain
Temperature: 34F; Dew Point: 33F; Relative Humidity: 95%
Wind: S @ 18G30 kts, peak wind SSE 35mph at 9:46 A.M.
Sea-level pressure: 1016.3 mb; 30.01 in. Hg: falling, then more rapidly
Visibility: 10 miles, thin fog
3-hr Precip: 0.02 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 E11 BKN 22 OVC 10R- 163/34/33/1718G30/001/ THN F ALQDS
PK WND 1630/46/ 8/52/ 58025 6002/
1 P.M.
Weather: Sky obscured, vertical visibility 200ft, light rain
Temperature: 39F; Dew Point: 39F; Relative Humidity: 100%
Wind: SSE @ 13G22 kts
Sea-level pressure: 1010.7 mb; 29.85 in. Hg: falling rapidly
Visibility: 1 mile, variable 1/8th mile to 3 miles, fog
6-hr Max temp: 39F
6-hr Min temp: 33F
6-hr Precip: 0.13 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 X W2 1VR-F 107/39/39/1613G22/985/ STFRA DRFTG OVR SMT
VSBY 1/8V3 PRESFR/ 8//// 58056 6013/ 10039 20033
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SUMMARY FOR SUNDAY, MARCH 23, 2025
TEMPERATURE (DEGREES F)
MAX…….44 NORMAL…..46
MIN…….25 NORMAL…..29
MEAN……35 NORMAL…..38
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..-3
TOTAL DEPARTURE FOR THE MONTH……………………+144 [+6.1 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY…………….30 DEPARTURE……..+2
TOTAL HEATING UNITS FOR THE MONTH……………562 DEPARTURE……-146
TOTAL HEATING UNITS FOR THE SEASON………….4743 DEPARTURE……-397
TOTAL HEATING UNITS LAST SEASON TO DATE……..4449 DEPARTURE……+294
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)………..39 WNW @ 12:18 A.M.
VECTOR #1 (1-Sec)……….39 NW @ 07:00 A.M.
VECTOR #2 (1-Sec)……….42 NW @ 07:00 A.M.
DAVIS #1……………….38 WNW @ 08:35 A.M.
DAVIS #2 ………………35 NW @ 12:19 A.M.
RMY #1 (Instantaneous)…..40 NW @ 07:00 A.M.
RMY #2 (Instantaneous)…..41 NW @ 07:00 A.M.
MERLIN…………………38 NW
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………30 WNW @ 01:04 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..26 @ 01:03 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..29 @ 08:38 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………28 W @ 01:03 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………29 NW @ 08:38 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..25 NW @ 05:28 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..29 WNW @ 08:38 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..14.3 NW [342 total miles]
VECTOR #1………………13.7
VECTOR #2………………14.8
DAVIS #1……………….14.3 NW
DAVIS #2……………….14.2 NW
RMY #1…………………13.4 NW
RMY #2…………………14.3 WNW
RICHARDS (C5C)…………..OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.19
TOTAL PRECIPITATION FOR THE MONTH…………..3.74 DEPARTURE…..-0.37
TOTAL PRECIPITATION FOR THE YEAR (2025)……..9.39 DEPARTURE…..-3.22
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…..-12.5
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……34.1 DEPARTURE…..-30.3
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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/…/.. 30 S VEC1 30 S RMY 30
3/21 46/36/41/+4/0.36/0.0/…/.. 48 NW VEC1 49 NW RMY 54
3/22 62/33/48/+11/T/0.0/…/.. 53 WNW VEC1 52 WNW RMY 58
3/23 44/25/35/-3/0.00/0.0/…/.. 39 WNW VEC1 39 NW RMY 40
3/24 The low since midnight is 31F, the daily normal low is 29F.
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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 24
HIGH 70 IN 1920
LOW 6 IN 1906
PRECIP 1.51 INS. IN 1956
SNOWFALL 12.3 INS. IN 1956
PEAK GUST 71 MPH W IN 1968
RECORDS FOR MARCH 25
HIGH 76 IN 1910
LOW 8 IN 1888, 1956
PRECIP 1.84 INS. IN 1909
SNOWFALL 1.8 INS. IN 2018
PEAK GUST 69 MPH SE IN 1969
TODAY’S REPORT PREPARED BY: Matt Douglas
