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Thursday, December 15, 2022

December 15, 2022

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA THURSDAY, DECEMBER 15, 2022 ALL TIMES ARE…

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

THURSDAY, DECEMBER 15, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0706E
SUNSET:  1612E

OVERCAST YET WARMER WITH LIGHT RAIN….

Today we observed overcast conditions with a decent
visibility this morning of 60 miles. This decreased
to 20 miles this afternoon as a thin layer of fog set
in. Rain began a little after 8 A.M., however lightly.
We measured only 0.01 inches by the 1 P.M. observation.

Wind is northeasterly, increasing as the day went on.
Speed is currently a little over 10 mph with frequent
gusts around 20 mph.

Any rainfall coming up would be greatly appreciated
as we’re in mid-December with an annual deficit of
-12.47 inches!

The high so far today is 38F, which is 2 degrees below
the normal maximum of 40F. The low since midnight is 30F,
which is 5 degrees above the normal minimum of 25F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Overcast stratus
Temperature: 34F; Dew Point: 30F; Relative Humidity: 87%
Wind: NNE @ 7G13 kts
Sea-level pressure: 1024.9 mb; 30.27 in. Hg: rising, then more
rapidly
Visibility: 60 miles
6-hr Max temp: 34F
6-hr Min temp: 30F
24-hr Precip:  0.00 ins.
24-hr Snowfall: 0.0 ins.
Snow Depth: 1 inch
BHO SA 1155 25 OVC 60 249/34/30/0207G13/027/ 8/6// 4/001
53007 10034 20030

10 A.M.
Weather: Overcast stratus, very light rain
Temperature: 33F; Dew Point: 31F; Relative Humidity: 91%
Wind: N @ 7 kts
Sea-level pressure: 1024.3 mb; 30.29 in. Hg: rising unsteadily
Visibility: 60 miles
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 25 OVC 60R- 243/33/31/3607/029/ PCPN VRY LGT/ 8/7//
52006 6000/

1 P.M.
Weather: Overcast stratus, very light drizzle
Temperature: 37F, Dew point: 35F; Relative Humidity: 94%
Wind: ENE @ 11G19 kts
Sea-level pressure: 1021.8 mb; 30.22 in Hg: falling, then more
rapidly
Visibility: 20 miles, thin fog
6-hr Max temp: 38F
6-hr Min temp: 32F
6-hr Precip:  0.01 ins.
6-hr Snowfall: 0.0 ins.
Snow Depth: Trace
BHO SA 1755 25 OVC 20L- 218/37/35/0711G19/022/ PCPN VRY LGT THN F ALQDS/
8/7// 4/000 58025 6001/ 10038 20032

————————————————————–

SUMMARY FOR WEDNESDAY, DECEMBER 14, 2022

TEMPERATURE (DEGREES F)
MAX…….35   NORMAL…..41
MIN…….18   NORMAL…..25
MEAN……27   NORMAL…..33

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………-6
TOTAL DEPARTURE FOR THE MONTH………………..+18 [+1.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY……………38  DEPARTURE……..+6
TOTAL HEATING UNITS FOR THE MONTH…………..403  DEPARTURE…….-19
TOTAL HEATING UNITS FOR THE SEASON…………1372  DEPARTURE……-254
TOTAL HEATING UNITS LAST SEASON TO DATE…….1369  DEPARTURE……..+3

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….42 NNW @  2:29 A.M.
VECTOR #2 (Instantaneous)..45     @  2:29 A.M.
DAVIS #2 ………………39 N   @  2:32 A.M.
RMY #2 (Instantaneous)…..44 NNW @  2:29 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………………28 NNW @  2:25 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..28     @ 10:30 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………27 N   @  2:32 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..28 NNW @  2:31 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…….16.7 NNW [401 total miles] VECTOR #2……………..16.7
DAVIS #2………………16.5 NNW
RMY #2………………..16.4 NNW
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…..-0.18
TOTAL PRECIPITATION FOR THE MONTH…………..1.44 DEPARTURE…..-1.07
TOTAL PRECIPITATION FOR THE YEAR…………..38.51 DEPARTURE….-12.47

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.4
TOTAL SNOWFALL FOR THE MONTH………………..2.6 DEPARTURE……-1.9
TOTAL SNOWFALL FOR THE SEASON (2022-2023)…….2.6 DEPARTURE……-4.4

————————————————————–

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 The low since midnight is 30F, the daily normal low is 25F

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

RECORDS FOR DECEMBER 15
HIGH 64 IN 1975
LOW 4 IN 1900, 1905, 1933
PRECIP 1.80 INS. IN 1981
SNOW 7.5 INS. IN 1951
PEAK GUST 65 MPH NW IN 1991

RECORDS FOR DECEMBER 16
HIGH 61 IN 1971
LOW -2 IN 1930
PRECIP 1.67 INS. IN 1960
SNOW 8.5 INS. IN 2007
WIND 73 MPH SSE IN 1982

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
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