Thursday, December 14, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
THURSDAY, DECEMBER 14, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0705E
SUNSET: 1612E
MAINLY SUNNY SKIES, BUT COLDER AND LESS WIND TODAY AT BLUE HILL….
Skies were clear all morning, but some scattered mid and high
level clouds are floating by early this afternoon. All in all
it’s a nice day despite the chilly air.
Temperatures are on the cold side for this time of year with
readings only reaching the low to mid 30s early this afternoon.
The dew point has been holding fairly steady in the low to mid
teens all day. So the air is very dry adding more chill to the
air.
The wind has been lighter today than the past couple of days.
It’s been mainly out of a northwesterly direction, with an average
speed for the day thus far of around 9mph. The peak gust for the
day so far is around 26mph which occurred around 5am this morning.
Visibility has been excellent all day with a view of 70-80 miles!
The maximum temperature for today is 34F degrees, this is 7 degrees
below the normal high of 41F. The minimum temperature since midnight
is 22F degrees, this is 3 degrees below the normal low of 25F.
————————————————————–
Today’s Observations:
7 A.M.
Weather: Clear, few stratocumulus offshore distant NE-S
Temperature: 23F; Dew Point: 12F; Relative Humidity: 63%
Wind: NW @ 9 kts
Sea-level pressure: 1036.2 mb; 30.60 in. Hg: rising, then more rapidly
Visibility: 70 miles
6-hr Max temp: 28F
6-hr Min temp: 23F
24-hr Precip: 0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 CLR 70 362/23/12/3209/060/ FEW SC OFFSHR DSNT NE-S/
8/500 53020 10028 20023
10 A.M.
Weather: Clear, few stratocumulus offshore distant NE-SE, few cirrus
distant SSW-W-N
Temperature: 28F; Dew Point: 13F; Relative Humidity: 53%
Wind: NW @ 9G18 kts
Sea-level pressure: 1037.2 mb; 30.63 in. Hg: rising, then more slowly
Visibility: 80 miles
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 CLR 80 372/28/13/3209G18/063/ FEW SC OFFSHR DSNT NE-SE
FEW CI DSNT SSW-W-N/ 8/502 51010
1 P.M.
Weather: Scattered cirrocumulus, thin scattered cirrus,
few stratocumulus offshore distant ENE-SE and distant WNW-W,
few altocumulus NW-N
Temperature: 32F; Dew Point: 13F; Relative Humidity: 44%
Wind: WNW @ 8G16 kts
Sea-level pressure: 1035.1 mb; 30.57 in. Hg: rising, then falling
Visibility: 80 miles
6-hr Max temp: 34F
6-hr Min temp: 22F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 180 SCT 250 -SCT 80 351/32/13/2908G16/057/ FEW SC OFFSHR
DSNT ENE-SE AND DSNT W-WNW FEW AC NW-N/ 8/559 58021 10034 20022
————————————————————–
SUMMARY FOR WEDNESDAY, DECEMBER 13, 2023
TEMPERATURE (DEGREES F)
MAX…….43 NORMAL…..41
MIN…….28 NORMAL…..26
MEAN……36 NORMAL…..33
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………..+3
TOTAL DEPARTURE FOR THE MONTH………………….+52 [+3.8 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY……………29 DEPARTURE……..-3
TOTAL HEATING UNITS FOR THE MONTH…………..337 DEPARTURE…….-53
TOTAL HEATING UNITS FOR THE SEASON…………1424 DEPARTURE……-170
TOTAL HEATING UNITS LAST SEASON TO DATE…….1334 DEPARTURE…….+90
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)……….E36 WNW @ 05:30 P.M.
VECTOR #1 (1-Sec)……….34 WNW @ 05:30 P.M.
VECTOR #2 (1-Sec)……….38 WNW @ 05:32 P.M.
DAVIS #1……………….34 W @ 05:30 P.M.
DAVIS #2 ………………34 NW @ 05:26 P.M.
RMY #1 (Instantaneous)…..36 WNW @ 05:29 P.M.
RMY #2 (Instantaneous)…..38 WNW @ 05:32 P.M.
MERLIN…………………32 WNW
RICHARDS (C5C) (Inst)……37 @ 05:29 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………25 WNW @ 05:34 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..23 @ 05:30 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..27 @ 05:33 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………24 WNW @ 05:30 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………27 WNW @ 05:33 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..22 WNW @ 05:34 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..27 WNW @ 05:33 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………23 @ 05:34 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….14.6 WNW[350 total miles]
VECTOR #1……………..14.0
VECTOR #2……………..15.4
DAVIS #1………………14.7 W
DAVIS #2………………15.3 WNW
RMY #1………………..13.4 WNW
RMY #2………………..15.0 WNW
RICHARDS (C5C)…………14.2
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.18
TOTAL PRECIPITATION FOR THE MONTH…………..3.50 DEPARTURE…..+1.17
TOTAL PRECIPITATION FOR THE YEAR…………..54.87 DEPARTURE…..+4.07
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.4
TOTAL SNOWFALL FOR THE MONTH………………..0.3 DEPARTURE……-3.8
TOTAL SNOWFALL FOR THE SEASON (2023-2024)…….0.3 DEPARTURE……-6.3
————————————————————–
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/-12/0.00/0.0/121/22 18 NNW VEC1 18 NW RMY 19
12/8 42/24/33/-2/0.00/0.0/530/96 20 S VEC1 18 S RMY 18
12/9 52/33/43/+9/0.00/0.0/264/48 24 S VEC1 24 S RMY 24
12/10 60/43/52/+18/0.66/0.0/033/06 55 SSW VEC1 54 SSW RMY 53
12/11 61/33/47/+13/1.96/0.0/038/07 69 SSW VEC1 69 SSW RMY 71
12/12 42/29/36/+2/0.00/0.0/543/99 33 WNW VEC1 32 WNW RMY 34
12/13 43/28/36/+3/0.00/0.0/470/86 36 WNW VEC1 34 WNW RMY 36
12/14 The low since midnight is 22F, the daily normal low is 25F
————————————————————–
DECEMBER DAILY RECORDS TO DATE
NONE…
————————————————————–
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR DECEMBER 14
HIGH 62 IN 1901
LOW -6 IN 1893
PRECIP 1.94 INS. IN 2002
SNOWFALL 8.0 INS. IN 1907
PEAK GUST 78e ENE IN 1941
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
TODAY’S REPORT PREPARED BY: Matt Douglas
