Friday, December 23, 2022

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

FRIDAY, DECEMBER 23, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0711E
SUNSET:  1616E

VERY WINDY WITH A DECENT AMOUNT OF RAIN ATOP GREAT BLUE HILL….

We observed very windy and overcast conditions with light
rain and a limited visibility of 5 miles. Rain overnight
totaled 1.12 inches with an additional 0.36 inches falling
between 7 A.M. and 1 P.M. Wind is out of the southeast with
a speed of 30 mph on average with frequent gusts around 50 mph.
The highest gust so far today is 74 mph around 8 A.M.

We received some help in the rainfall department, with our
monthly surplus being raised to 1.06 inches. The annual
total is still 10.34 inches below normal.

The high so far today is 55F, which is 17 degrees above the
normal maximum of 38F. The low since midnight is 43F, which
is 20 degrees above the normal minimum of 23F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Overcast stratus with light rain
Temperature: 54F; Dew Point: 54F; Relative Humidity: 100%
Wind: SE @ 30G48 kts, peak of 59 mph SE
Sea-level pressure: 997.1 mb; 30.44 in. Hg: falling rapidly
Visibility: 5 miles, fog
6-hr Max temp: 54F
6-hr Min temp: 44F
24-hr Precip:  1.12 ins.
24-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 20 OVC 5R-F 971/54/54/1430G48/944/ PK WND 1351/29
PRESFR/ 8/7// 58086 70112 10054 20044

10 A.M.
Weather: Overcast stratus with light rain
Temperature: 55F; Dew Point: 55F; Relative Humidity: 100%
Wind: SSE @ 26G46 kts, peak of 67 mph SSE
Sea-level pressure: 992.9 mb; 29.32 in. Hg: falling, then
more rapidly
Visibility: 6 miles, fog
3-hr Precip:  0.24 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 20 OVC 6R-F 929/55/55/1626G46/932/ PK WND 1658/07/
8/7// 58042 6024/

1 P.M.
Weather: Overcast stratus and light rain
Temperature: 53F, Dew point: 53F; Relative Humidity: 100%
Wind: SSE @ 25G40 kts, peak of 47 mph SSE at 12:05 P.M.
Sea-level pressure: 985.0 mb; 29.09 in Hg: falling rapidly
Visibility: 6 miles, fog
6-hr Max temp: 55F
6-hr Min temp: 52F
6-hr Precip:  0.36 ins.
6-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 20 OVC 6R-F 850/53/53/1625G40/909/ PK WND 1641/05 PRESFR/
8/7// 58079 6036/ 10055 20052

————————————————————–

SUMMARY FOR THURSDAY, DECEMBER 22, 2022

TEMPERATURE (DEGREES F)
MAX…….43   NORMAL…..39
MIN…….28   NORMAL…..23
MEAN……36   NORMAL…..31

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………+5
TOTAL DEPARTURE FOR THE MONTH………………..+40 [+1.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY……………29  DEPARTURE……..-5
TOTAL HEATING UNITS FOR THE MONTH…………..647  DEPARTURE…….-41
TOTAL HEATING UNITS FOR THE SEASON…………1616  DEPARTURE……-275
TOTAL HEATING UNITS LAST SEASON TO DATE…….1595  DEPARTURE…….+21

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….44 E   @ 10:27 P.M.
VECTOR #2 (Instantaneous)..46     @ 10:27 P.M.
DAVIS #2 ………………44 E   @ 10:28 P.M.
RMY #2 (Instantaneous)…..45 E   @ 10:27 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………………31 E   @ 10:29 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..30     @ 10:29 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………31 ESE @ 11:38 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..29 E   @ 10:29 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…….11.3 E [272 total miles] VECTOR #2……………..11.8
DAVIS #2………………11.9 ESE
RMY #2………………..11.7 E
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……..1.12 DEPARTURE…..+0.94
TOTAL PRECIPITATION FOR THE MONTH…………..4.98 DEPARTURE…..+1.06
TOTAL PRECIPITATION FOR THE YEAR…………..42.05 DEPARTURE….-10.34

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.4
TOTAL SNOWFALL FOR THE MONTH………………..2.7 DEPARTURE……-5.3
TOTAL SNOWFALL FOR THE SEASON (2022-2023)…….2.7 DEPARTURE……-7.8

————————————————————–

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 The low since midnight is 43F, the daily normal low is 23F

DAILY RECORDS

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

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

RECORDS FOR DECEMBER 23
HIGH 62 IN 1990
LOW -1 IN 1989
PRECIP 1.53 INS. IN 1994
SNOWFALL 11.9 INS. IN 1947
PEAK GUST 67 SSE IN 2004

RECORDS FOR DECEMBER 24
HIGH 67 IN 2015
LOW -6 IN 1943
PRECIP 2.21 INS. IN 1994
SNOWFALL 12.3 INS. IN 1961
PEAK GUST 79e MPH SE IN 1941

TODAY’S REPORT PREPARED BY: Benjamin Turner