Friday, December 8, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
FRIDAY, DECEMBER 8, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0700E
SUNSET: 1612E
ABUNDANT SUNSHINE TODAY WITH NEAR NORMAL TEMPERATURES…
The skies have generally been mostly clear with the exception
of some distant clouds out near the horizon. As the temperatures
warmed through the late morning to early afternoon, more cirrus
clouds filled in the sky.
Temperatures overnight were in the mid 20’s and by our first
observation we were only 1 degree from yesterday’s high. We have
slowly warmed to near normal temperatures which is a bit of a
reprieve from the bitter cold from the past couple of days. The
dew point values have also increased quite a bit but are still
relatively comfortable, holding in the upper 20’s.
The wind has continued to remain light, with some brief periods of
calm conditions throughout the late morning hours. The average speed
so far has been around 7 mph with the current gust around 15 mph,
which occurred shortly after midnight.
Visibility has been limited to general haziness throughout the day,
giving us about a 40 mile overall viewing. By late morning and early
afternoon a thin smoke layer continued to impact the visibility.
The maximum temperature so far today is 40F degrees, which is 2 degrees
below the normal high of 42F. The minimum temperature since midnight
is 24F degrees, which is 3 degrees below the normal low of 27F.
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Today’s Observations:
7 A.M.
Weather: Scattered cirrostratus, few stratocumulus offshore distant
NE-ESE, few altocumulus N-E-SE
Temperature: 27F; Dew Point: 25F; Relative Humidity: 93%
Wind: NW @ 5 kts, wind light
Sea-level pressure: 1021.4 mb; 30.16 in. Hg: rising steadily
Visibility: 40 miles
6-hr Max temp: 27F
6-hr Min temp: 24F
24-hr Precip: 0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 250 SCT 40 214/27/25/3005/016/ FEW SC OFFSHR DSNT NE-ESE
FEW AC N-E-SE WND LGT/ 8/558 52019 10027 20024
10 A.M.
Weather: Thin scattered cirrus, few scattered stratocumulus SSW-W,
altocumulus distant NNE-E
Temperature: 35F; Dew Point: 28F; Relative Humidity: 77%
Wind: calm
Sea-level pressure: 1023.4 mb; 30.22 in. Hg: rising, then more slowly
Visibility: 40 miles, thin smoke layer all quadrants, hazy
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 250 -SCT 40 234/35/28/0000/022/ FEW SC SSW-W FEW AC DSNT NNE-E
THN K LYR ALQDS HAZY WND CALM/ 8/551 51020
1 P.M.
Weather: Scattered cirrus, few altocumulus NW-NNW
Temperature: 27F; Dew Point: 14F; Relative Humidity: 58%
Wind: calm
Sea-level pressure: 1022.8 mb; 30.20 in. Hg: falling, then more slowly
Visibility: 40 miles, thin smoke layer N-E, hazy
6-hr Max temp: 40F
6-hr Min temp: 27F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 250 SCT 40 228/40/28/0000/020/ FEW AC NW-NNW THN K LYR N-E
HAZY WND CALM/ 8/054 56006 10040 20027
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SUMMARY FOR THURSDAY, DECEMBER 7, 2023
TEMPERATURE (DEGREES F)
MAX…….28 NORMAL…..43
MIN…….17 NORMAL…..27
MEAN……23 NORMAL…..35
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………-12
TOTAL DEPARTURE FOR THE MONTH………………….+9 [+1.1 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY……………42 DEPARTURE…….+12
TOTAL HEATING UNITS FOR THE MONTH…………..194 DEPARTURE…….-10
TOTAL HEATING UNITS FOR THE SEASON…………1281 DEPARTURE……-126
TOTAL HEATING UNITS LAST SEASON TO DATE…….1134 DEPARTURE……+147
PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
F420C, Contacting, Merlin, and Richards are all Main Tower.
E=Estimated
F420C (Official)……….E18 NW @ 01:30 A.M.
VECTOR #1 (1-Sec)……….18 NW @ 02:04 A.M.
VECTOR #2 (1-Sec)……….20 NNW @ 01:25 A.M.
DAVIS #1……………….17 N @ 01:46 A.M.
DAVIS #2 ………………17 NNW @ 01:25 A.M.
RMY #1 (Instantaneous)…..19 NNW @ 02:38 A.M.
RMY #2 (Instantaneous)…..21 NNW @ 01:25 A.M.
MERLIN…………………15 NW
RICHARDS (C5C) (Inst)……18 @ 02:06 A.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………13 NW @ 02:05 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..12 @ 02:05 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..13 @ 11:18 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………13 NW @ 02:06 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………13 NW @ 11:18 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..12 NW @ 02:06 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..13 NW @ 11:18 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………13 @ 11:19 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….7.7 WNW [185 total miles]
VECTOR #1……………..8.0
VECTOR #2……………..8.5
DAVIS #1………………8.1 WNW
DAVIS #2………………8.2 NW
RMY #1………………..7.7 WNW
RMY #2………………..8.3 NW
RICHARDS (C5C)…………8.4
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.18
TOTAL PRECIPITATION FOR THE MONTH…………..0.88 DEPARTURE…..-0.37
TOTAL PRECIPITATION FOR THE YEAR…………..52.25 DEPARTURE…..+2.53
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.3
TOTAL SNOWFALL FOR THE MONTH………………..0.3 DEPARTURE……-1.5
TOTAL SNOWFALL FOR THE SEASON (2023-2024)…….0.3 DEPARTURE……-4.0
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PRELIMINARY CLIMATE SUMMARY FOR DECEMBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN)/SUN(%)/PEAK GUST/VEC1/RMY GUST
PEAK GUST: F420C (Official)
VEC1: Vector #1 1-second gust
RMY: R.M. Young #1 wind gust recording system (Instantaneous)
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M: Missing data
12/1 51/38/45/+8/0.04/0.0/213/38 29 SW VEC1 28 SW RMY 29
12/2 48/43/46/+9/T/0.0/000/00 18 SSW VEC1 19 SSW RMY 19
12/3 44/41/43/+7/0.76/0.0/000/00 31 ENE VEC1 32 ENE RMY 33
12/4 49/37/43/+7/0.07/0.0/155/28 23 W VEC1 22 W RMY 23
12/5 38/28/33/-3/0.00/0.0/144/26 23 NNW VEC1 24 NW RMY 24
12/6 34/22/28/-7/0.01/0.3/100/18 21 N VEC1 21 N RMY 20
12/7 28/17/56/-12/0.00/0.0/…/.. 18 NNW VEC1 18 NW RMY 19
12/8 The low since midnight is 24F, the daily normal low is 27F
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DECEMBER DAILY RECORDS TO DATE
NONE…
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DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR DECEMBER 8
HIGH 62 IN 1966
LOW -4 IN 1906
PRECIP 1.54 INS. IN 1969
SNOWFALL 2.5 INS. IN 2001
PEAK GUST 78e W IN 1979
RECORDS FOR DECEMBER 9
HIGH 68 IN 1966
LOW -14 IN 1902
PRECIP 3.23 INS. IN 2014
SNOWFALL 10.8 INS. IN 2005
PEAK GUST 66 SE IN 1973
TODAY’S REPORT PREPARED BY: Amanda Joly
