Tuesday, March 4, 2025

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

TUESDAY, MARCH 4, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0614E
SUNSET:  1738E

CLOUDS INCREASE WITH MILDER TEMPERATURES AND A BRISK WIND….

We started the day with plenty of sunshine being filtered through
some thin broken cirrus clouds. However by mid morning, a deck of
mid level altocumulus clouds rolled in significantly filtering or
even completely blocking the sun at times.

Regardless of the cloud cover, milder temperatures are being
advected into the region by increasing southwest winds. Readings
started the day in the mid to upper 20s, but have recovered nicely
into the mid to upper 40s by early this afternoon. The dew point is
also significantly higher than it was the past couple of days with
values getting into the mid 20s, indicating that the arctic air mass
has moved out of the area.

As mentioned, winds have been increasing during the morning becoming
rather gusty by the late morning and early afternoon hours. The
average speed for the day so far is around 14mph, however the average
is closer to 17-20mph over the past couple of hours. Gusts have been
reaching the 30-35mph range frequently as we moved into the early
afternoon hours, with a peak gust so far of 38mph which occurred
at 11:42am.

Visibility has been somewhat limited today thanks to general
haziness. The view has been around 30-35 miles all day.

The maximum temperature for today is 47F degrees, which is 6 degrees
above the normal high of 41F. The minimum temperature since midnight
is 23 degrees, which is equal to the normal low of 23F.

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Today’s Observations:

7 A.M.
Weather: Thin broken cirrus, few altocumulus distant WSW-NW-NNE
Temperature: 27F; Dew Point: 20F; Relative Humidity: 75%
Wind: SSW @ 10 kts
Sea-level pressure: 1024.1 mb; 30.24 in. Hg: falling, then steady
Visibility: 30 miles, hazy
6-hr Max temp: 27F
6-hr Min temp: 24F
24-hr Precip:  0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 E250 -BKN 30 241/27/20/2110/024/ FEW AC DSNT WSW-NW-NNE
HAZY/ 8/051 56007 10027 20024

10 A.M.
Weather: Broken altocumulus, thin broken cirrus
Temperature: 38F; Dew Point: 18F; Relative Humidity: 44%
Wind: SW @ 14G21 kts
Sea-level pressure: 1024.0 mb; 30.24 in. Hg: rising, then falling
Visibility: 35 miles, hazy
3-hr Precip:  0.0 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 E75 BKN 250 -BKN 35 240/38/18/2214G21/024/ HAZY/ 8/051 58001

1 P.M.
Weather: Scattered altocumulus, thin broken cirrus
Temperature: 46F; Dew Point: 24F; Relative Humidity: 42%
Wind: SW @ 16G27 kts, peak wind SW 35mph at 12:23 P.M.
Sea-level pressure: 1020.5 mb; 30.14 in. Hg: falling, then more rapidly
Visibility: 35 miles, hazy
6-hr Max temp: 47F
6-hr Min temp: 27F
6-hr Precip:  0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 75 SCT 250 -BKN 35 205/46/24/2216G27/014/ HAZY
PK WND 2230/23/ 8/051 58035 10047 20027

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SUMMARY FOR MONDAY, MARCH 3, 2025

TEMPERATURE (DEGREES F)
MAX…….31   NORMAL…..40
MIN……. 8   NORMAL…..23
MEAN……20   NORMAL…..32

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………….-12
TOTAL DEPARTURE FOR THE MONTH…………………….-18 [-6.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY…………….45  DEPARTURE…….+12
TOTAL HEATING UNITS FOR THE MONTH……………118  DEPARTURE…….+18
TOTAL HEATING UNITS FOR THE SEASON………….4299  DEPARTURE……-233
TOTAL HEATING UNITS LAST SEASON TO DATE……..3963  DEPARTURE……+336

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 NW   @   03:12 A.M.
VECTOR #1 (1-Sec)……….28 NW   @   03:12 A.M.
VECTOR #2 (1-Sec)……….31 WNW  @   03:12 A.M.
DAVIS #1……………….28 NW   @   03:08 A.M.
DAVIS #2 ………………27 NNW  @   03:12 A.M.
RMY #1 (Instantaneous)…..31 NW   @   03:10 A.M.
RMY #2 (Instantaneous)…..30 WNW  @   03:12 A.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………24 NW   @   03:10 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..20      @   03:10 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..21      @   03:14 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………21 NW   @   03:10 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………20 NNW  @   03:14 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..20 NW   @   03:10 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..20 NW   @   03:14 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………9.5 NW  [228 total miles] VECTOR #1……………….9.6
VECTOR #2………………10.1
DAVIS #1………………..9.9 NW
DAVIS #2………………..9.9 NW
RMY #1………………….9.2 NW
RMY #2………………….9.9 WNW
RICHARDS (C5C)…………..OTS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.18
TOTAL PRECIPITATION FOR THE MONTH………….TRACE DEPARTURE…..-0.52
TOTAL PRECIPITATION FOR THE YEAR (2025)……..5.65 DEPARTURE…..-3.37

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M………….0.00 DEPARTURE……-0.6
TOTAL SNOWFALL FOR THE MONTH………………TRACE DEPARTURE……-1.9
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……34.1 DEPARTURE…..-19.7

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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/…/..            46 NW  VEC1 46 NW  RMY 49
3/2    28/14/21/-11/0.00/0.0/…/..      41 NW  VEC1 42 NW  RMY 43
3/3    31/8/20/-12/0.00/0.0/…/..       28 NW  VEC1 28 NW  RMY 31

3/4 The low since midnight is 23F, the daily normal low is 23F.

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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 4
HIGH 69 IN 1974
LOW -5 IN 1950 [RECORD LOW FOR MONTH] PRECIP 1.80 IN 1960
SNOWFALL 17.3 IN 1960
PEAK GUST 81e MPH SSW IN 1971

RECORDS FOR MARCH 5
HIGH 64 IN 1979
LOW -2 IN 1948
PRECIP 1.76 INS. IN 1920, 2001
SNOWFALL 12.0 INS. IN 1917
PEAK GUST 76e MPH WNW IN 1971

TODAY’S REPORT PREPARED BY: Matt Douglas