Saturday, March 1, 2025

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BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

SATURDAY, MARCH 1, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0619E
SUNSET: 1734E

WARM WITH LIGHT RAIN TO BEGIN METEOROLOGICAL SPRING….

Sunrise was beautiful this morning, with mid level clouds across
the western portion of the sky. These clouds quickly filled in and we have
remained overcast since, outside of a few breaks of sunshine late morning.
Very light rain early this morning and this afternoon has only amounted to a
trace.

With flow out of the south, temperatures remain above normal today.
The minimum occurred at midnight in the mid 30s, and we have since made
it into the low 50s. The dew point has risen from the low 30s to the low
40s, but has continued to lag behind the temperature by several degrees.

Winds have been steady, with an average speed of 19mph. The peak gust
took place around 4:20am, with a speed of 36mph.

Visibility has remained modest, holding at 30 miles due to virga.

The maximum temperature for today is 50F degrees, which is 10 degrees
above the normal high of 40F. The minimum temperature since midnight
is 34F degrees, which is 11 degrees above the normal low of 23F.

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PRELIMINARY STATS FOR FEBRUARY 2025

TEMPERATURE, Deg. F
Avg. Max. 35.5 [-1.5] Avg. Min. 20.1 [+0.6] Mean 27.8 [-0.4] 24-hour corrected mean: 28.0
Max. for month: 55F on the 25th
Min. for month: 5F on the 2nd

HEATING DEGREE DAYS
Total heating units: 1038 [+009] Total for the season: 4181 [-251] Total for last season: 3852

COOLING DEGREE DAYS
Total cooling units: 0 [ 000] Total for the season: 0 [ 000] Total for last season: 0

PRECIPITATION, Inches
Total: 3.30 [-0.70] Greatest in 24 hrs: 1.86 on the 15th-16th

SNOWFALL, Inches
Total: 13.1 [ -5.1] Greatest in 24 hrs: 4.9 on the 15th-16th

WIND, mph
Avg. uncorrected wind speed: 13.2 mph
Avg. corrected wind speed: 13.6 mph
Prevailing wind direction: West-Northwest [25%] Peak gust and direction: 70 WNW on the 17th

SUNSHINE:
Campbell-Stokes card minutes: 8778 of a possible 17148, or 51%
Astronomical total minutes: 9115 of a possible 17808 or 51%

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Today’s Observations:

7 A.M.
Weather: Scattered stratocumulus, broken nimbostratus, broken altocumulus,
virga SW-WNW
Temperature: 41F; Dew Point: 34F; Relative Humidity: 76%
Wind: SSW @ 18G25 kts, peak wind S 30mph @ 6:24 A.M.
Sea-level pressure: 1001.7 mb; 29.58 in. Hg: falling, then rising
Visibility: 30 miles
6-hr Max temp: 41F
6-hr Min temp: 34F
24-hr Precip: Trace
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 50 SCT E90 BKN 110 BKN 30 017/41/34/2018G25/958/ VIRGA SW-WNW
PK WND 1926/24/ 8/570 55006 70000 10041 20034

10 A.M.
Weather: Broken nimbostratus, overcast altocumulus,
few breaks in overcast distant W-NNW, virga SSW-W-NNE
Temperature: 46F; Dew Point: 38F; Relative Humidity: 74%
Wind: S @ 14G21 kts
Sea-level pressure: 999.5 mb; 29.52 in. Hg: falling, then more rapidly
Visibility: 30 miles
3-hr Precip: Trace
3-hr Snowfall: 0.0 inches
BHO SA 1455 E80 BKN 100 OVC 30 995/46/38/1814G21/952/ FEW BINOVC DSNT W-NNW
VIRGA SSW-W-NNE R-E10B17E21/ 8/07/ 58022 6000/

1 P.M.
Weather: Scattered stratus fractus, broken nimbostratus,
overcast altocumulus, few breaks in overcast distant SW-NW
Temperature: 47F; Dew Point: 40F; Relative Humidity: 77%
Wind: S @ 11G22 kts
Sea-level pressure: 996.5 mb; 29.43 in. Hg: falling, then more rapidly
Visibility: 20 miles, virga all quadrants
6-hr Max temp: 50F
6-hr Min temp: 41F
6-hr Precip: Trace
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 35 SCT E70 BKN 100 OVC 20 965/47/40/1911G22/943/
FEW BINOVC DSNT SW-NW VIRGA ALQDS SUN DMLY VSBL R-E50/ 8/77/ 58030
6000/ 10050 20041

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SUMMARY FOR FRIDAY, FEBRUARY 28, 2025

TEMPERATURE (DEGREES F)
MAX…….45 NORMAL…..40
MIN…….33 NORMAL…..22
MEAN……39 NORMAL…..31

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+8
TOTAL DEPARTURE FOR THE MONTH……………………..-9 [-0.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY…………….26 DEPARTURE……..-8
TOTAL HEATING UNITS FOR THE MONTH…………..1038 DEPARTURE……..+9
TOTAL HEATING UNITS FOR THE SEASON………….4181 DEPARTURE……-251
TOTAL HEATING UNITS LAST SEASON TO DATE……..3852 DEPARTURE……+329

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)………..41 WNW @ 09:18 A.M.
VECTOR #1 (1-Sec)……….42 WNW @ 09:18 A.M.
VECTOR #2 (1-Sec)……….43 WNW @ 10:07 A.M.
DAVIS #1……………….43 W @ 09:19 A.M.
DAVIS #2 ………………43 W @ 09:18 A.M.
RMY #1 (Instantaneous)…..43 WNW @ 09:18 A.M.
RMY #2 (Instantaneous)…..46 WNW @ 10:07 A.M.
MERLIN…………………40 WNW
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………30 W @ 10:08 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..28 @ 09:21 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..30 @ 10:09 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………30 W @ 09:21 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………31 WNW @ 10:09 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..27 WNW @ 09:21 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..30 W @ 10:09 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..13.9 WNW [334 total miles] VECTOR #1………………13.5
VECTOR #2………………14.5
DAVIS #1……………….14.1 WNW
DAVIS #2……………….14.2 WNW
RMY #1…………………12.8 WNW
RMY #2…………………14.2 W
RICHARDS (C5C)…………..OTS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….TRACE DEPARTURE…..-0.16
TOTAL PRECIPITATION FOR THE MONTH…………..3.30 DEPARTURE…..-0.70
TOTAL PRECIPITATION FOR THE YEAR (2025)……..5.65 DEPARTURE…..-2.85

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.6
TOTAL SNOWFALL FOR THE MONTH……………….13.1 DEPARTURE……-5.1
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……34.1 DEPARTURE…..-17.8

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PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY 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

2/1 32/10/21/-5/0.07/0.4/000/00 35 NNW VEC1 34 NNW RMY 35
2/2 24/5/15/-11/0.10/1.0/260/43 22 SE VEC1 25 SE RMY 24
2/3 42/24/33/+7/0.05/0.5/321/53 35 SSW VEC1 35 SSW RMY 35
2/4 41/20/31/+5/0.00/0.0/542/89 51 NW VEC1 51 NW RMY 55
2/5 27/14/21/-6/0.00/0.0/562/92 32 NW VEC1 32 NW RMY 32
2/6 32/16/24/-3/0.22/1.0/000/00 26 SE VEC1 28 SE RMY 25
2/7 38/22/30/+3/0.00/0.0/542/88 48 WNW VEC1 49 WNW RMY 50
2/8 35/19/27/0/0.09/1.1/433/70 23 W VEC1 22 W RMY 23
2/9 29/23/26/-1/0.30/3.0/006/01 24 N VEC1 24 N RMY 24
2/10 33/19/26/-1/0.00/0.0/343/55 26 WNW VEC1 27 NW RMY 28
2/11 30/14/22/-5/0.00/0.0/232/37 23 WSW VEC1 22 WSW RMY 23
2/12 32/24/28/0/0.04/0.4/006/01 29 ENE VEC1 29 ENE RMY 28
2/13 38/28/33/+5/0.42/0.7/000/00 52 WNW VEC1 52 WNW RMY 55
2/14 32/20/26/-2/0.00/0.0/634/100 50 NW VEC1 50 NW RMY 54
2/15 28/15/22/-6/0.29/3.3/108/17 20 ESE VEC1 20 ESE RMY 18
2/16 35/22/29/+1/1.66/1.6/000/00 45 W VEC1 45 W RMY 48 TSTM
2/17 28/16/22/-7/T/T/597/93 70 WNW VEC1 68 WNW RMY 72
2/18 25/13/19/-10/0.00/0.0/645/100 51 WNW VEC1 52 WNW RMY 54
2/19 30/12/21/-8/0.00/0.0/635/98 33 WNW VEC1 33 WNW RMY 34
2/20 29/11/20/-9/T/T/046/07 26 NW VEC1 27 NW RMY 27
2/21 33/17/25/-4/0.00/0.0/470/72 38 NW VEC1 39 NW RMY 40
2/22 35/13/24/-6/0.00/0.0/505/77 30 NW VEC1 30 NW RMY 33
2/23 42/25/34/+4/0.00/0.0/395/60 30 WNW VEC1 31 WNW RMY 28
2/24 45/25/35/+5/0.00/0.0/449/68 33 SSW VEC1 34 SSW RMY 35
2/25 55/35/45/+15/T/0.0/153/23 31 SSW VEC1 31 SSW RMY 32
2/26 51/35/43/+12/0.00/0.0/620/93 31 NW VEC1 31 WNW RMY 33
2/27 49/33/41/+10/0.06/0.1/020/03 36 WNW VEC1 36 WNW RMY 35
2/28 45/33/39/+8/0.00/0.0/591/88 41 WNW VEC1 42 WNW RMY 43