Monday, December 12, 2022
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
MONDAY, DECEMBER 12, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0704E
SUNSET: 1612E
CHILLY, YET FAIR WEATHER FOLLOWING SOME MORE SNOWFALL….
Snowfall from last night totaled 2.0 inches, which
worked out to 0.14 inches melted! Snow depth on the
summit has been 2 inches all day.
We observed rapidly changing conditions since the
7 A.M. observation, both in regard to visibility and
sky cover. Visibility increased from 8 miles this
morning to 80 miles by 1 P.M. Cloud cover went
from overcast to almost clear as the day went on.
Weather was chilly with temperatures holding below
30F. Wind was northerly with speeds around 15 mph
by noontime. This is very chilly as dew points dropped
into the low teens.
The high so far today is 28F, which is 13 degrees below
the normal maximum of 41F. The low since midnight is 21F,
which is 5 degrees below the normal minimum of 26F.
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Today’s Observations:
7 A.M.
Weather: Overcast stratus
Temperature: 21F; Dew Point: 21F; Relative Humidity: 100%
Wind: N @ 9G13 kts
Sea-level pressure: 1020.0 mb; 30.12 in. Hg: rising, then more
slowly
Visibility: 8 miles, thin fog
6-hr Max temp: 22F
6-hr Min temp: 21F
24-hr Precip: 0.14 ins.
24-hr Snowfall: 2.0 ins.
Snow Depth: 1 inch
BHO SA 1155 20 OVC 8 200/21/21/3607G13/012/ THN F ALQDS NEW SNW
PST 24 HRS 2.0 INS/ 8/6// 4/002 51017 70014 10022 20021
10 A.M.
Weather: Scattered stratocumulus, broken altostratus
Temperature: 25F; Dew Point: 22F; Relative Humidity: 90%
Wind: N @ 10G17 kts
Sea-level pressure: 1020.0 mb; 30.12 in. Hg: falling then
rising
Visibility: 15 miles, thin fog
3-hr Precip: 0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 30 SCT 70 BKN 15 200/25/22/3610G17/012/ THN F
ALQDS/ 8/550 50000
1 P.M.
Weather: Clear, few stratocumulus NE-E-SE
Temperature: 28F, Dew point: 14F; Relative Humidity: 56%
Wind: NNE @ 10G16 kts
Sea-level pressure: 1019.2 mb; 30.10 in Hg: falling, then
more slowly
Visibility: 80 miles
6-hr Max temp: 28F
6-hr Min temp: 21F
6-hr Precip: 0.00 ins.
6-hr Snowfall: 0.0 ins.
Snow Depth: 2 ins.
BHO SA 1755 CLR 80 192/28/14/0210G16/010/ FEW SC NE-E-SE/
8/500 4/002 56008 10028 20021
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SUMMARY FOR SUNDAY, DECEMBER 11, 2022
TEMPERATURE (DEGREES F)
MAX…….30 NORMAL…..41
MIN…….23 NORMAL…..26
MEAN……27 NORMAL…..34
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……..-7
TOTAL DEPARTURE FOR THE MONTH………………..+37 [+3.2 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY……………38 DEPARTURE……..+7
TOTAL HEATING UNITS FOR THE MONTH…………..289 DEPARTURE…….-38
TOTAL HEATING UNITS FOR THE SEASON…………1258 DEPARTURE……-272
TOTAL HEATING UNITS LAST SEASON TO DATE…….1306 DEPARTURE…….-48
PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….25 NNE @ 2:29 A.M.
VECTOR #2 (Instantaneous)..26 @ 2:29 A.M.
DAVIS #2 ………………23 NE @ 2:29 A.M.
RMY #2 (Instantaneous)…..26 NNE @ 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………………17 NNE @ 2:30 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..17 @ 2:30 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………17 NE @ 2:30 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..17 NNE @ 2:30 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…….10.0 N [241 total miles]
VECTOR #2……………..10.7
DAVIS #2………………10.1 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……..0.14 DEPARTURE…..-0.04
TOTAL PRECIPITATION FOR THE MONTH…………..1.44 DEPARTURE…..-0.53
TOTAL PRECIPITATION FOR THE YEAR…………..38.51 DEPARTURE….-11.93
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..2.0 DEPARTURE……+1.6
TOTAL SNOWFALL FOR THE MONTH………………..2.5 DEPARTURE……-0.8
TOTAL SNOWFALL FOR THE SEASON (2022-2023)…….2.5 DEPARTURE……-3.3
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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/…/.. 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 30/23/27/-7…./…/…/.. 25 NNE AERO N/A RMY 26
12/12 The low since midnight is 21F, 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 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
RECORDS FOR DECEMBER 13
HIGH 60 IN 1984
LOW 0 IN 1893
PRECIP 1.45 INS. IN 1983
SNOWFALL 9.2 INS. IN 2007
PEAK GUST 81e WNW IN 1976
TODAY’S REPORT PREPARED BY: Benjamin Turner
