Tuesday, March 12, 2024

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

TUESDAY, MARCH 12, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0600E
SUNSET:  1748E

SUNNY AND WARM WITH BRISK BREEZE…

Aside from some distant clouds, the skies have been largely clear
today, making it a great day to enjoy some sunshine!

Temperatures are above average for the time of year, beginning in
the low 30s and quickly rising to the low 50s by the afternoon. The stiff
breeze has been making it feel a bit cooler, however. This airmass is
quite dry, as the dew point has remained in the upper teens to low
20s all day.

Though not as active as yesterday, the winds remain noticeable. Our
average so far is around 15mph, mostly out of the west-northwest. The
peak gust to this point is around 37mph, taking place just before 1pm.

Visibility has remained great today, with views holding at 80 miles!

The maximum temperature so far today is 52F degrees, which is
9 degrees above the normal high of 43F. The minimum temperature
since midnight is 33F degrees, which is 7 degrees above the normal
low of 26F.

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Today’s Observations:

7 A.M.
Weather: Clear, few cirrostratus distant NNW-SE,
few cirrus distant E-SSE
Temperature: 35F; Dew Point: 19F; Relative Humidity: 53%
Wind: WNW @ 10 kts
Sea-level pressure: 1006.2 mb; 29.71 in. Hg: rising, then more rapidly
Visibility: 80 miles
6-hr Max temp: 35F
6-hr Min temp: 33F
24-hr Precip:  0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 CLR 80 062/35/19/3010/971/ FEW CS DSNT NNW-SE
FEW CI DSNT E-SSE/ 8/008 53020 10035 20033

10 A.M.
Weather: Clear, few stratocumulus distant WSW-NW,
few cirrus distant N-NE
Temperature: 44F; Dew Point: 18F; Relative Humidity: 34%
Wind: NW @ 19G30 kts, peak wind NW 35mph at 9:48 A.M.
Sea-level pressure: 1006.6 mb; 29.72 in. Hg: rising, then falling
Visibility: 80 miles
3-hr Precip:  0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 CLR 80 066/44/18/3119G30/972/ FEW SC DSNT WSW-NW
FEW CI DSNT N-NE PK WND 3130/48/ 8/501 50004

1 P.M.
Weather: Clear, few stratocumulus distant SW-NW,
few cirrus distant N-ENE
Temperature: 51F; Dew Point: 22F; Relative Humidity: 31%
Wind: NW @ 18G32 kts, peak wind NW 37mph at 12:45 P.M.
Sea-level pressure: 1005.3 mb; 29.69 in. Hg: falling, then more rapidly
Visibility: 80 miles
6-hr Max temp: 52F
6-hr Min temp: 35F
6-hr Precip:  0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 CLR 80 053/51/22/3118G32/969/ FEW SC DSNT SW-NW
FEW CI DSNT N-ENE PK WND 3232/45/ 8/501 58013 10052 20035

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SUMMARY FOR MONDAY, MARCH 11, 2024

TEMPERATURE (DEGREES F)
MAX…….43   NORMAL…..42
MIN…….30   NORMAL…..25
MEAN……37   NORMAL…..34

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………+3
TOTAL DEPARTURE FOR THE MONTH…………………..+84 [+7.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY……………28  DEPARTURE……..-3
TOTAL HEATING UNITS FOR THE MONTH…………..272  DEPARTURE…….-85
TOTAL HEATING UNITS FOR THE SEASON…………4160  DEPARTURE……-629
TOTAL HEATING UNITS LAST SEASON TO DATE…….4045  DEPARTURE……+115

PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
F420C, Contacting, Merlin, and Richards are all Main Tower.
E=Estimated

F420C (Official)……….E53 NW   @  11:06 A.M.
VECTOR #1 (1-Sec)……….54 NW   @  11:18 A.M.
VECTOR #2 (1-Sec)……….61 NW   @  11:05 A.M.
DAVIS #1……………….51 NW   @  11:06 A.M.
DAVIS #2 ………………55 NNW  @  11:05 A.M.
RMY #1 (Instantaneous)…..58 NW   @  11:06 A.M.
RMY #2 (Instantaneous)…..62 NW   @  11:05 A.M.
MERLIN…………………56 NW
RICHARDS (C5C) (Inst)……57      @  11:06 A.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………35 NW   @  11:08 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..35      @  11:07 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..38      @  11:07 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………37 NW   @  11:19 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………38 NNW  @  11:07 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..35 NW   @  11:07 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..37 NW   @  11:07 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………35      @  11:07 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……21.7 WNW [521 total miles] VECTOR #1…………….20.3
VECTOR #2…………….23.0
DAVIS #1……………..21.5 WNW
DAVIS #2……………..22.6 NW
RMY #1……………….19.5 WNW
RMY #2……………….22.2 WNW
RICHARDS (C5C)………..20.7

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.17
TOTAL PRECIPITATION FOR THE MONTH…………..4.33 DEPARTURE…..+2.41
TOTAL PRECIPITATION FOR THE YEAR (2024)…….14.89 DEPARTURE…..+4.47

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……-6.6
TOTAL SNOWFALL FOR THE SEASON (2023-2024)……26.1 DEPARTURE…..-32.4

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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
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)

3/1   41/18/30/-1/0.00/0.0/649/96         30 NW  VEC1 30 WNW RMY 33
3/2   50/32/41/+9/1.16/0.0/000/00         44 SSE VEC1 46 SE  RMY 42
3/3   55/42/49/+17/0.24/0.0/130/19        32 SSE VEC1 33 SSE RMY 32
3/4   49/36/43/+11/0.01/0.0/116/17        24 ENE VEC1 22 ENE RMY 23
3/5   42/36/39/+7/0.14/0.0/000/00         21 E   VEC1 21 E   RMY 21
3/6   51/39/45/+12/0.44/0.0/000/00        28 NE  VEC1 28 NE  RMY 29
3/7   42/37/40/+7/1.06/0.0/000/00         44 NNE VEC1 44 NNE RMY 42
3/8   45/32/39/+6/0.00/0.0/…/..         35 NNE VEC1 36 NNE RMY 38
3/9   40/32/36/+3/0.21/0.0/…/..         32 E   VEC1 32 E   RMY 31
3/10  51/36/44/+10/1.07/0.0/…/..        45 WNW VEC1 46 SE  RMY 45
3/11  43/30/37/+3/T/T/…/..              53 NW  VEC1 54 NW  RMY 58

3/12 The low since midnight is 33F, the daily normal low is 26F.

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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 12
HIGH 72 IN 2012
LOW 2 IN 1885
PRECIP 2.87 INS. IN 1888
SNOWFALL 9.7 INS. IN 1959
PEAK GUST 66 MPH SE IN 1962

RECORDS FOR MARCH 13
HIGH 72 IN 1990
LOW -1 IN 1885
PRECIP 2.47 INS. IN 1993
SNOWFALL 23.0 INS. IN 2018 [RECORD FOR MONTH] PEAK GUST 76 MPH ENE IN 1993 [THE “STORM OF THE CENTURY”]

TODAY’S REPORT PREPARED BY: Joshua Polen