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Sunday, December 11, 2022

December 11, 2022

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA SUNDAY, DECEMBER 11, 2022 ALL TIMES ARE…

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

SUNDAY, DECEMBER 11, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0703E
SUNSET:  1612E

OVERCAST BUT QUIETER FOLLOWING THE FIRST MEASURABLE
SNOWFALL OF THE SEASON….

Today we observed overcast skies with a northeasterly
wind around 5 mph. Snowfall yesterday evening totaled
0.5 inches, being the first measurable snowfall of the
season. We are at a snowfall deficit of -2.4 inches on
the month and -4.9 inches on the year.

Visibility was decent today under low clouds, being
60 miles on average.  Conditions were colder today,
with temperatures not breaking out of the mid-20’s.

The high so far today is 28F, which is 13 degrees below
the normal maximum of 41F. The low since midnight is 23F,
which is 3 degrees below the normal minimum of 26F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Overcast stratus
Temperature: 24F; Dew Point: 18F; Relative Humidity: 77%
Wind: N @ 11G14 kts
Sea-level pressure: 1029.3 mb; 30.39 in. Hg: falling then
rising
Visibility: 60 miles
6-hr Max temp: 28F
6-hr Min temp: 23F
24-hr Precip:  0.05 ins.
24-hr Snowfall: 0.5 ins.
Snow Depth: 1 inch
BHO SA 1155 20 OVC 60 293/24/18/36011G14/039/ NEW SNW PST
24 HRS 0.5 INS/ 8/6// 4/001 55002 70005 10028 10023

10 A.M.
Weather: Overcast stratus
Temperature: 25F; Dew Point: 21F; Relative Humidity: 87%
Wind: N @ 7 kts
Sea-level pressure: 1028.7 mb; 30.37 in. Hg: falling then
rising
Visibility: 60 miles
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 20 OVC 60 287/25/21/3607/037/ 8/6// 55006

1 P.M.
Weather: Overcast stratus
Temperature: 27F, Dew point: 24F; Relative Humidity: 89%
Wind: NE @ 6 kts, wind light
Sea-level pressure: 1025.0 mb; 30.27 in Hg: falling, then
more slowly
Visibility: 60 miles
6-hr Max temp: 28F
6-hr Min temp: 24F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
Snow Depth: Trace
BHO SA 1755 20 OVC 60 250/27/24/0506/027/ WND LGT/ 8/6//
4/000 56034 10028 20024

————————————————————–

SUMMARY FOR SATURDAY, DECEMBER 10, 2022

TEMPERATURE (DEGREES F)
MAX…….31   NORMAL…..42
MIN…….27   NORMAL…..27
MEAN……29   NORMAL…..34

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……..-5
TOTAL DEPARTURE FOR THE MONTH………………..+44 [+4.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY……………36  DEPARTURE……..+5
TOTAL HEATING UNITS FOR THE MONTH…………..251  DEPARTURE…….-44
TOTAL HEATING UNITS FOR THE SEASON…………1220  DEPARTURE……-279
TOTAL HEATING UNITS LAST SEASON TO DATE…….1291  DEPARTURE…….-71

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….27 NE  @  9:51 P.M.
VECTOR #2 (Instantaneous)..28     @  9:51 P.M.
DAVIS #2 ………………25 ENE @  9:52 P.M.
RMY #2 (Instantaneous)…..26 NE  @  9:51 P.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………………17 NE  @  9:51 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..18     @  9:52 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………18 ENE @  9:53 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..17 NE  @  9:52 P.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…….10.3 NNE [247 total miles] VECTOR #2……………..10.7
DAVIS #2………………10.4 NNE
RMY #2………………..10.4 NNE
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……..0.05 DEPARTURE…..-0.13
TOTAL PRECIPITATION FOR THE MONTH…………..1.30 DEPARTURE…..-0.49
TOTAL PRECIPITATION FOR THE YEAR…………..38.37 DEPARTURE….-11.89

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.5 DEPARTURE……+0.2
TOTAL SNOWFALL FOR THE MONTH………………..0.5 DEPARTURE……-2.4
TOTAL SNOWFALL FOR THE SEASON (2022-2023)…….0.5 DEPARTURE……-4.9

————————————————————–

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/…/..        39 SSE  AERO N/A    RMY 39
12/8  53/33/43/+8/0.00/0.0/…/..         36 NNW  AERO N/A    RMY 39
12/9  44/29/37/+3/0.00/0.0/…/..         29 N    AERO N/A    RMY 30
12/10 31/27/29/-5/…./…/…/..         27 NE   AERO N/A    RMY 26

12/11 The low since midnight is 23F, the daily normal low is 26F

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

RECORDS FOR DECEMBER 11
HIGH 63 IN 1911
LOW -1 IN 1988
PRECIP 2.36 INS. IN 1992
SNOWFALL 4.8 INS. IN 2019
PEAK GUST 78 S IN 1969

RECORDS FOR DECEMBER 12
HIGH 67 IN 1979
LOW -3 IN 1988
PRECIP 3.94 INS. IN 1992
SNOWFALL 20.3 INS. IN 1960
PEAK GUST 75 MPH SSE IN 2008

TODAY’S REPORT PREPARED BY: Benjamin Turner

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Blue Hill Observatory & Science Center · Legal

Data Use & Privacy Policy

Please read the full Policy before accessing Observatory data · Effective January 1, 2025

Notice: By accessing, downloading, or using any Blue Hill Observatory data or services, you unconditionally accept and agree to be bound by this Policy in its entirety. If you do not agree, you may not access or use Observatory data.
Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
Part I — Data Use Policy
§ 01

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Effective January 1, 2025 · Blue Hill Observatory & Science Center · Milton, Massachusetts
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