Sunday, March 16, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SUNDAY, MARCH 16, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0554E
SUNSET: 1752E
ANOTHER UNSEASONABLY WARM DAY WITH AFTERNOON GUSTY CONDITIONS….
This morning was much like yesterday, with impacted visibility and
widespread foggy conditions. Relative humidity also stayed in or near
100% for much of the morning, further impacting visibility. Once the
fog cleared out some and the sun made its appearance, we saw a
dramatic rise in temperature.
Temperatures continue to stay above average, with an overnight “low”
of 44F. High temperatures were slow to rise during the early morning
due to the fog, but have rebounded quickly with the lifting of the
fog.
Winds were on the steady side for much of the day but picked up
quite a bit by the early afternoon with the approaching cold front.
Winds have been predominantly out of the SSW, bringing us warmer
air which is partially why our temperatures have been above normal.
Our average for the day so far is about 17mph and the peak gust of
around 45mph occured at 12:50pm.
Visibility has been impacted for much of the day due to foggy
conditions. The fog had lifted some by late morning, but still left
us with about 30 miles as a maximum visibility by the end of the
observation period.
The maximum temperature for today is 67F degrees, which is 23 degrees
above the normal high of 44F. The minimum temperature since midnight
is 44F degrees, which is 17 degrees above the normal low of 27F.
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Today’s Observations:
7 A.M.
Weather: Sky obscured, vertical visibility 200ft
Temperature: 50F; Dew Point: 50F; Relative Humidity: 100%
Wind: SSW @ 13G19 kts
Sea-level pressure: 1018.7 mb; 30.08 in. Hg: falling, then steady
Visibility: 1/8 mile, fog
6-hr Max temp: 50F
6-hr Min temp: 44F
24-hr Precip: 0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 X W2 1/8 F 187/50/50/1913G19/008/ 8//// 56001 10050 20044
10 A.M.
Weather: Overcast stratus
Temperature: 55F; Dew Point: 55F; Relative Humidity: 100%
Wind: SSW @ 16G24 kts
Sea-level pressure: 1018.8 mb; 30.09 in. Hg: rising, then falling
Visibility: 4 miles, fog
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 E8 OVC 4 F 188/55/55/2016G24/009/ 8/6// 50001
1 P.M.
Weather: Broken stratocumulus, overcast altocumulus, few breaks in
overcast E-ESE
Temperature: 59F; Dew Point: 43F; Relative Humidity: 74%
Wind: SSW @ 22G39 kts, peak wind SSW 45mph at 12:50 P.M.
Sea-level pressure: 1016.3 mb; 30.01 in. Hg: falling, then more rapidly
Visibility: 35 miles
6-hr Max temp: 66F
6-hr Min temp: 50F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 E25 BKN 100 OVC 35 163/66/58/2022G39/001/ FEW BINOVC E-ESE
PK WND 2039/50/ 8/55/ 58025 10066 20050
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SUMMARY FOR SATURDAY, MARCH 15, 2025
TEMPERATURE (DEGREES F)
MAX…….59 NORMAL…..44
MIN…….37 NORMAL…..26
MEAN……48 NORMAL…..35
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………….+13
TOTAL DEPARTURE FOR THE MONTH…………………….+78 [+5.0 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY…………….17 DEPARTURE…….-13
TOTAL HEATING UNITS FOR THE MONTH……………400 DEPARTURE…….-79
TOTAL HEATING UNITS FOR THE SEASON………….4581 DEPARTURE……-330
TOTAL HEATING UNITS LAST SEASON TO DATE……..4244 DEPARTURE……+337
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)………..28 S @ 07:23 P.M.
VECTOR #1 (1-Sec)……….28 S @ 07:23 P.M.
VECTOR #2 (1-Sec)……….29 S @ 06:48 P.M.
DAVIS #1……………….31 S @ 07:51 P.M.
DAVIS #2 ………………34 S @ 06:54 P.M.
RMY #1 (Instantaneous)…..28 SSW @ 06:48 P.M.
RMY #2 (Instantaneous)…..31 S @ 06:48 P.M.
MERLIN…………………28 S
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………22 S @ 07:23 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..21 @ 07:23 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..22 @ 07:24 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………22 S @ 09:39 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………25 S @ 06:41 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..21 S @ 07:23 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..22 S @ 07:24 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..12.7 SSW [304 total miles]
VECTOR #1………………13.0
VECTOR #2………………13.3
DAVIS #1……………….12.6 S
DAVIS #2……………….13.8 SSW
RMY #1…………………12.7 SSW
RMY #2…………………13.4 S
RICHARDS (C5C)…………..OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.17
TOTAL PRECIPITATION FOR THE MONTH…………..1.18 DEPARTURE…..-1.42
TOTAL PRECIPITATION FOR THE YEAR (2025)……..6.83 DEPARTURE…..-4.27
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.5
TOTAL SNOWFALL FOR THE MONTH………………TRACE DEPARTURE……-8.8
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……34.1 DEPARTURE…..-26.6
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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/…/.. 28 S VEC1 28 S RMY 28
3/16 The low since midnight is 44F, the daily normal low is 27F.
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MARCH 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 MARCH 16
HIGH 73 IN 1990
LOW 8 IN 1932
PRE 1.95 INS. IN 1900
SNOW 10.0 INS. IN 1896
WIND 79 MPH NE IN 1956
RECORDS FOR MARCH 17
HIGH 69 IN 2003
LOW 6 IN 1885
PRECIP 1.97 INS. IN 1968
SNOWFALL 6.5 INS. IN 1956
PEAK GUST 70 MPH SSW IN 1973
TODAY’S REPORT PREPARED BY: Amanda Joly
