Tuesday, December 27, 2022

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

TUESDAY, DECEMBER 27, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0712E
SUNSET:  1618E

MILDER WITH GOOD VISIBILITY AS WE BREAK
FREEZING ONCE AGAIN….

Today is milder than the temps of last week, with temperatures
making their way into the mid 30’s. Skies are partly cloudy,
and wind is westerly at around 10 mph.

Visibility is decent, reaching 70 miles by the
10 A.M. observation.

The ponds are completely frozen, with a few small puddles
forming on both due to the abundant sunshine and above
freezing daytime temperatures.

The high so far today is 32F, which is 6 degrees below the
normal maximum of 38F. The low since midnight is 23F, which
is a degree above the normal minimum of 22F.

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Today’s Observations:

7 A.M.
Weather: Overcast altocumulus
Temperature: 24F; Dew Point: 14F; Relative Humidity: 65%
Wind: W @ 8G12 kts
Sea-level pressure: 1023.2 mb; 30.22 in. Hg: rising, then
more rapidly
Visibility: 20 miles, haze
6-hr Max temp: 24F
6-hr Min temp: 23F
24-hr Precip:  0.00 ins.
24-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 80 OVC 20 232/24/14/2708G12/022/ HAZY/ 8/07/
53009 10024 20023

10 A.M.
Weather: Broken altocumulus
Temperature: 26F; Dew Point: 16F; Relative Humidity: 65%
Wind: W @ 7G14 kts
Sea-level pressure: 1023.8 mb; 30.24 in. Hg: rising, then
more slowly
Visibility: 70 miles
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 80 BKN 70 238/26/16/2707G14/024/ 8/070 51006

1 P.M.
Weather: Scattered altocumulus
Temperature: 31F; Dew Point: 14F; Relative Humidity: 49%
Wind: WNW @ 11G18 kts
Sea-level pressure: 1023.2 mb; 30.19 in. Hg: falling, then
more slowly
Visibility: 70 miles
6-hr Max temp: 32F
6-hr Min temp: 24F
24-hr Precip:  0.00 ins.
24-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 80 SCT 70 232/31/14/3011G18/019/ 8/050 56015
10032 20024

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SUMMARY FOR MONDAY, DECEMBER 26, 2022

TEMPERATURE (DEGREES F)
MAX…….32   NORMAL…..38
MIN…….15   NORMAL…..22
MEAN……24   NORMAL…..30

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……..-6
TOTAL DEPARTURE FOR THE MONTH………………..+7 [+0.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY……………41  DEPARTURE……..+6
TOTAL HEATING UNITS FOR THE MONTH…………..819  DEPARTURE……..-8
TOTAL HEATING UNITS FOR THE SEASON…………1788  DEPARTURE……-243
TOTAL HEATING UNITS LAST SEASON TO DATE…….1742  DEPARTURE…….+46

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….23 WSW @  2:07 A.M.
VECTOR #2 (Instantaneous)..24     @  2:07 A.M.
DAVIS #2 ………………23 W   @  2:05 A.M.
RMY #2 (Instantaneous)…..23 WSW @  2:06 A.M.
VECTOR #1……OUT OF SERVICE D/T RENOVATIONS
DAVIS #1…….OUT OF SERVICE D/T RENOVATIONS
RMY #1………OUT OF SERVICE D/T RENOVATIONS
MERLIN………OUT OF SERVICE D/T RENOVATIONS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………16 WSW @  2:07 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..16     @  7:30 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………16 W   @  2:12 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..16 WSW @  7:30 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE….OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE RMY #1 AVERAGE……OUT OF SERVICE D/T RENOVATIONS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….8.9 WSW [213 total miles] VECTOR #2……………..9.7
DAVIS #2………………9.8 W
RMY #2………………..9.7 W
RMY #1……….OUT OF SERVICE D/T RENOVATIONS
VECTOR #1…….OUT OF SERVICE D/T RENOVATIONS
DAVIS #1……..OUT OF SERVICE D/T RENOVATIONS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.17
TOTAL PRECIPITATION FOR THE MONTH…………..5.51 DEPARTURE…..+0.91
TOTAL PRECIPITATION FOR THE YEAR…………..42.58 DEPARTURE….-10.49

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.5
TOTAL SNOWFALL FOR THE MONTH………………..2.7 DEPARTURE……-7.3
TOTAL SNOWFALL FOR THE SEASON (2022-2023)…….2.7 DEPARTURE……-9.8

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PRELIMINARY CLIMATE SUMMARY FOR DECEMBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN)/SUN(%)/PEAK GUST/AERO/RMY GUST
AERO: Aerovane wind recording system gust
RMY:  R.M. Young wind gust recording system
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M:    Missing data

12/1  40/30/35/-2/0.00/0.0/520/93         54 NW   AERO N/A    RMY 60
12/2  44/27/36/-1/0.00/0.0/535/96         24 SSW  AERO N/A    RMY 25
12/3  57/36/47/+11/0.31/0.0/000/00        54 SSW  AERO N/A    RMY 57
12/4  41/30/36/0/0.00/0.0/355/64          39 WNW  AERO N/A    RMY 41
12/5  48/29/39/+3/0.00/0.0/454/82         32 SSW  AERO N/A    RMY 32
12/6  54/38/46/+11/0.09/0.0/000/00        30 SSE  AERO N/A    RMY 31
12/7  56/46/51/+16/0.85/0.0/000/00        39 SSE  AERO N/A    RMY 39
12/8  53/33/43/+8/0.00/0.0/534/97         36 NNW  AERO N/A    RMY 39
12/9  44/29/37/+3/0.00/0.0/549/100        29 N    AERO N/A    RMY 30
12/10 31/27/29/-5/0.04/0.4/000/00         27 NE   AERO N/A    RMY 26
12/11 30/23/27/-7/0.15/2.1/000/00         25 NNE  AERO N/A    RMY 26
12/12 29/21/25/-9/T/T/395/72              24 N    AERO N/A    RMY 24
12/13 38/19/29/-4/0.00/0.0/547/100        38 NNW  AERO N/A    RMY 38
12/14 35/18/27/-6/T/0.1/…/..            42 NNW  AERO N/A    RMY 44
12/15 40/30/35/+2/0.09/0.0/…/..         40 E    AERO N/A    RMY 41
12/16 42/39/41/+9/1.88/0.0/…/..         47 E    AERO N/A    RMY 48
12/17 42/31/37/+5/0.45/0.1/…/..         37 WNW  AERO N/A    RMY 38
12/18 39/27/33/+1/0.00/0.0/…/..         29 NW   AERO N/A    RMY 28
12/19 39/25/32/0/0.00/0.0/…/..          41 WNW  AERO N/A    RMY 41
12/20 38/25/32/+1/0.00/0.0/…/..         34 NW   AERO N/A    RMY 35
12/21 37/22/30/-1/0.00/0.0/…/..         17 N    AERO N/A    RMY 17
12/22 43/28/36/+5/…./0.0/…/..         44 E    AERO N/A    RMY 45
12/23 55/15/35/+4/…./0.0/…/..         74 SE   AERO N/A    RMY 74
12/24 17/6/12/-18/…./0.0/…/..         37 WSW  AERO N/A    RMY 39
12/25 25/9/17/-13/0.00/0.0/…/..         29 WSW  AERO N/A    RMY 31
12/26 32/15/24/-6/0.00/0.0/…/..         23 WSW  AERO N/A    RMY 23

12/27 The low since midnight is 23F, the daily normal low is 22F

DAILY RECORDS

12/16/2022: NEW PRECIPITATION RECORD OF 1.88 INS,
THIS BEATS THE OLD RECORD OF 1.67 INS SET IN 1960

12/23/2022: NEW PEAK GUST RECORD 74 SE,
REPLACING THE OLD RECORD OF 67 SSE IN 2004

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

RECORDS FOR DECEMBER 26
HIGH 58 IN 1973,1982
LOW -12 IN 1980
PRECIP 3.64 INS. IN 1969
SNOWFALL 17.5 INS. IN 1909
PEAK GUST 84 MPH SSE IN 1957

RECORDS FOR DECEMBER 27
HIGH 57 IN 1895,1949
LOW -4 IN 1903
PRECIP 2.43 INS. IN 1969
SNOWFALL 11.2 INS. IN 1947
PEAK GUST 73 S IN 2011

TODAY’S REPORT PREPARED BY: Benjamin Turner