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BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
MONDAY, DECEMBER 4, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0657E
SUNSET: 1612E
PARTIAL SUNSHINE RETURNS WITH MILD TEMPERATURES AND LIGHT WIND…
Yesterday’s soaking steady rain amounted to 0.82″ in the rain
gauge here at Blue Hill. Rain ended by 2:30am this morning, but
dense fog was left in its wake until the mid morning hours.
Visibility early this morning was as low as 1/16th of a mile.
The fog lifted and breaks developed in the cloud cover during the
mid morning hours, leaving us with a rather pleasant day overall into
early this afternoon. A mix of sun and clouds has been the theme
with improving visibility and a bit drier air working into the area.
Temperatures have warmed into the mid and upper 40s early this
afternoon, but with the light wind, it feels quite nice out there
today.
As mentioned, the wind has been on the light side for the most part
today with an average speed of only around 6mph. However the wind is
showing signs of getting a little busier as the highest gust occurred
right at observation time with 23mph.
Visibility was quite limited early this morning, to around 1/16th
of a mile, due to dense fog. It has improved markedly into this
afternoon however, with the view reaching 70 miles.
The maximum temperature so far today is 49F degrees, this is 5
degrees above the normal high of 44F. The minimum temperature since
midnight is 37F degrees, which is 9 degrees above the normal low
of 28F.
————————————————————–
PRELIMINARY STATS FOR NOVEMBER 2023
TEMPERATURE, Deg. F
Avg. Max. 48.5 [-1.6]
Avg. Min. 31.8 [-2.0]
Mean 40.2 [-1.8]
24-hour corrected mean: 39.7
Max. for month: 65F on the 7th
Min. for month: 20F on the 25th
HEATING DEGREE DAYS
Total heating units: 737 [+045]
Total for the season: 1087 [-117]
Total for last season: 969
COOLING DEGREE DAYS
Total cooling units: 000 [ 000]
Total for the season: 715 [+038]
Total for last season: 889
PRECIPITATION, Inches
Total: 2.18 [-2.13]
Greatest in 24 hrs: 1.25 on the 21st-22nd
SNOWFALL, Inches
Total: Trace [-1.8]
Greatest in 24 hrs: T on the 1st, 9th, 13th, 21st, and 22nd
WIND, mph
Avg. uncorrected wind speed: 10.8 mph
Avg. corrected wind speed: 11.3 mph
Prevailing wind direction: Northwest [15%]
Peak gust and direction: 46 SE on the 27th
SUNSHINE:
Campbell-Stokes card minutes: 10470 of a possible 17010, or 62%
Astronomical total minutes: 10860 of a possible 17641, or 62%
————————————————————–
Today’s Observations:
7 A.M.
Weather: Sky obscured, vertical visibility 200ft
Temperature: 37F; Dew Point: 37F; Relative Humidity: 100%
Wind: NW @ 6 kts, wind light
Sea-level pressure: 1006.1 mb; 29.71 in. Hg: falling, then rising
Visibility: 1/16 mile, fog
6-hr Max temp: 43F
6-hr Min temp: 37F
24-hr Precip: 0.82 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 X W2 1/16F 061/37/37/3106/971/ WND LGT/ 8//// 53018 6003/
70082 10043 20037
10 A.M.
Weather: Sky partially obscured, overcast stratus, stratus fractus
occasionally drifting over summit
Temperature: 39F; Dew Point: 39F; Relative Humidity: 100%
Wind: W @ 6 kts, wind light
Sea-level pressure: 1007.3 mb; 29.75 in. Hg: rising unsteadily
Visibility: 3 miles, 1/2 mile variable 5 miles, fog
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 -X E1 OVC 3VF 073/39/39/2806/975/ STFRA OCNLY DRFTG OVR SMT
VSBY 1/2V5 WND LGT/ 8/7// 52012
1 P.M.
Weather: Broken stratocumulus, broken altocumulus, broken cirrus
Temperature: 47F; Dew Point: 40F; Relative Humidity: 78%
Wind: W @ 8 kts
Sea-level pressure: 1006.2 mb; 29.71 in. Hg: falling, then rising
Visibility: 70 miles
6-hr Max temp: 49F
6-hr Min temp: 37F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 E25 BKN 65 BKN 250 BKN 70 062/47/40/2608/971/ 8/551 55011
10049 20037
————————————————————–
SUMMARY FOR SUNDAY, DECEMBER 3, 2023
TEMPERATURE (DEGREES F)
MAX…….44 NORMAL…..44
MIN…….41 NORMAL…..29
MEAN……43 NORMAL…..36
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….+7
TOTAL DEPARTURE FOR THE MONTH…………………+24 [+7.8 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY……………22 DEPARTURE……..-7
TOTAL HEATING UNITS FOR THE MONTH……………61 DEPARTURE…….-24
TOTAL HEATING UNITS FOR THE SEASON…………1148 DEPARTURE……-141
TOTAL HEATING UNITS LAST SEASON TO DATE…….1046 DEPARTURE……+102
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)……….E31 ENE @ 04:31 P.M.
VECTOR #1 (1-Sec)……….32 ENE @ 04:47 P.M.
VECTOR #2 (1-Sec)……….33 ENE @ 04:23 P.M.
DAVIS #1……………….31 E @ 01:16 P.M.
DAVIS #2 ………………33 E @ 03:42 P.M.
RMY #1 (Instantaneous)…..33 ENE @ 04:31 P.M.
RMY #2 (Instantaneous)…..34 ENE @ 03:41 P.M.
MERLIN…………………30 ENE
RICHARDS (C5C) (Inst)……30 @ 01:16 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………22 E @ 08:42 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..20 @ 04:48 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..22 @ 03:51 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………22 ENE @ 04:48 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………22 ENE @ 03:51 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..21 ENE @ 04:48 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..21 ENE @ 04:48 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………21 @ 04:48 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……12.7 E [304 total miles]
VECTOR #1…………….11.6
VECTOR #2…………….13.0
DAVIS #1……………..13.3 E
DAVIS #2……………..12.9 E
RMY #1……………….12.4 ENE
RMY #2……………….12.8 ENE
RICHARDS (C5C)………..12.7
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.82 DEPARTURE…..+0.65
TOTAL PRECIPITATION FOR THE MONTH…………..0.86 DEPARTURE…..+0.34
TOTAL PRECIPITATION FOR THE YEAR…………..52.23 DEPARTURE…..+3.24
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.3
TOTAL SNOWFALL FOR THE MONTH………………..0.0 DEPARTURE……-0.7
TOTAL SNOWFALL FOR THE SEASON (2023-2024)…..TRACE DEPARTURE……-3.2
————————————————————–
PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 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
11/1 42/31/37/-10/0.01/T/056/09 23 ENE VEC1 21 ENE RMY 23
11/2 45/28/37/-10/0.00/0.0/618/100 23 NNW VEC1 23 NNW RMY 22
11/3 55/36/46/0/0.00/0.0/541/88 32 SW VEC1 33 SSW RMY 33
11/4 59/44/52/+6/0.00/0.0/049/08 32 SW VEC1 31 SW RMY 32
11/5 61/42/52/+6/0.00/0.0/360/59 24 NNW VEC1 27 NNW RMY 27
11/6 50/40/45/+/0.00/0.0/067/11 28 S VEC1 27 S RMY 25
11/7 65/46/56/+11/0.05/0.0/272/45 38 WNW VEC1 37 WNW RMY 37
11/8 48/33/41/-4/0.00/0.0/440/73 36 NNW VEC1 38 NNW RMY 39
11/9 42/32/37/+7/0.11/T/000/00 20 WNW VEC1 20 WNW RMY 20
11/10 49/38/44/0/0.00/0.0/024/04 23 W VEC1 23 W RMY 22
11/11 49/30/40/-3/0.00/0.0/590/99 29 NW VEC1 26 NW RMY 30
11/12 41/27/34/-9/0.00/0.0/475/80 20 N VEC1 19 N RMY 19
11/13 44/24/34/-9/T/T/456/77 20 NNW VEC1 20 N RMY 19
11/14 47/31/39/-3/0.00/0.0/342/58 29 NW VEC1 29 NW RMY 29
11/15 50/30/40/-2/0.00/0.0/475/81 30 SW VEC1 30 SW RMY 31
11/16 62/40/51/+9/0.00/0.0/574/98 30 WSW VEC1 31 WSW RMY 31
11/17 64/43/54/+13/0.00/0.0/280/48 35 SSW VEC1 36 SSW RMY 37
11/18 56/30/43/+2/0.20/0.0/157/27 35 NW VEC1 35 NW RMY 37
11/19 50/29/40/-1/0.00/0.0/475/82 38 WNW VEC1 38 WNW RMY 39
11/20 38/25/32/-8/0.00/0.0/577/100 29 NNW VEC1 32 NNW RMY 33
11/21 39/22/31/-9/0.05/T/363/63 29 SE VEC1 29 SE RMY 28
11/22 53/33/43/+3/1.20/T/000/00 38 SE VEC1 40 SE RMY 37
11/23 50/36/43/+4/0.00/0.0/572/100 33 NW VEC1 32 NW RMY 33
11/24 47/26/37/-2/0.00/0.0/496/87 35 WNW VEC1 33 WNW RMY 33
11/25 35/20/28/-11/0.00/0.0/545/96 26 NW VEC1 25 NW RMY 26
11/26 43/27/35/-3/0.08/0.0/289/51 31 SE VEC1 36 SE RMY 32
11/27 53/34/44/+6/0.48/0.0/401/71 46 SE VEC1 48 SE RMY 47
11/28 38/26/32/-6/0.00/0.0/355/63 41 WNW VEC1 42 WNW RMY 43
11/29 36/23/30/-8/0.00/0.0/472/84 31 WNW VEC1 31 WNW RMY 30
11/30 45/27/36/-1/0.00/0.0/516/96 32 SW VEC1 32 SW RMY 31
————————————————————–
NOVEMBER DAILY RECORDS TO DATE
11/1 TIED RECORD FOR SNOWFALL WITH A TRACE, TIED WITH 1906, 1951
————————————————————–
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 The low since midnight is 37F, the daily normal low is 28F
————————————————————–
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 4
HIGH 67 IN 1998
LOW -4 IN 1940
PRECIP 1.87 INS. IN 1968
SNOWFALL 6.0 INS. IN 1907
PEAK GUST 73 MPH WNW IN 1980
RECORDS FOR DECEMBER 5
HIGH 65 IN 2001
LOW -1 IN 1926
PRECIP 2.86 INS. IN 1993
SNOWFALL 7.0 INS. IN 1893, 1895, 1926, 1981
PEAK GUST 67 MPH WNW IN 1961, S IN 1973
TODAY’S REPORT PREPARED BY: Matt Douglas
