Friday, December 29, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
FRIDAY, DECEMBER 29, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0713E
SUNSET: 1620E
CLOUDS, DRIZZLE, AND FOG ARE KEEPING IT DREARY ON BLUE HILL TODAY….
While the steadier and heavier rainfall moved out of the area
yesterday afternoon, persistent drizzle, and at times a light
rain continues to the plague the area today. Storm total rainfall
through 7am this morning was 0.76″. An additional 0.04″ has
fallen since 7am, again, mainly in the form of drizzle and very
light rain.
Temperatures have been stuck in the upper 30s to low 40s all day.
While it is “chilly” due to the damp conditions, it is still
slightly above normal for this time of year.
The wind has been quite light today, even going calm for a time
during the mid morning hours. The average speed for the day is
only around 5mph. The peak gust so far today is 17mph, which
occurred just after midnight.
Visibility had been limited to between 1/16 and 1/4 all morning,
but has improved to around 5 miles early this afternoon as the
cloud level has risen a bit.
The maximum temperature so far today is 42F degrees, this is 5
degrees above the normal high of 37F. The minimum temperature since
midnight is 38F degrees, this is 17 degrees above the normal low
of 21F.
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Today’s Observations:
7 A.M.
Weather: Sky obscured, vertical visibility 200ft, very light drizzle
Temperature: 38F; Dew Point: 38F; Relative Humidity: 100%
Wind: N @ 2 kts, wind light
Sea-level pressure: 1004.7 mb; 29.67 in. Hg: falling, then rising
Visibility: 1/16 mile, fog
6-hr Max temp: 39F
6-hr Min temp: 38F
24-hr Precip: 0.57 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 X W2 1/16L-F 047/38/38/3502/967/ PCPN VRY LGT WND LGT/
8//// 53003 6002/ 70057 10039 20038
10 A.M.
Weather: Overcast stratus, very light drizzle
Temperature: 40F; Dew Point: 40F; Relative Humidity: 100%
Wind: Calm
Sea-level pressure: 1005.3 mb; 29.69 in. Hg: steady, then rising
Visibility: 1/4 mile, fog
3-hr Precip: Trace
3-hr Snowfall: 0.0 inches
BHO SA 1455 E3 OVC 1/4L-F 053/40/40/0000/969/ PCPN VRY LGT WND CALM/
8/6// 53006 6000/
1 P.M.
Weather: Overcast stratus, very light rain, lower stratus fractus
all quadrants and occasionally drifting over summit
Temperature: 41F; Dew Point: 41F; Relative Humidity: 100%
Wind: SW @ 4 kts, wind light
Sea-level pressure: 1003.3 mb; 29.63 in. Hg: falling, then more rapidly
Visibility: 5 miles, fog
6-hr Max temp: 42F
6-hr Min temp: 38F
6-hr Precip: 0.04 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 E3 OVC 5R-F 033/41/41/2204/963/ LWR STFRA ALQDS AND OCNLY
DRFTG OVR SMT PCPN VRY LGT WND LGT/ 8/7// 58020 6004/ 10042 20038
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SUMMARY FOR THURSDAY, DECEMBER 28, 2023
TEMPERATURE (DEGREES F)
MAX…….44 NORMAL…..37
MIN…….39 NORMAL…..22
MEAN……42 NORMAL…..29
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….+13
TOTAL DEPARTURE FOR THE MONTH…………………+171 [+5.9 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY……………23 DEPARTURE…….-13
TOTAL HEATING UNITS FOR THE MONTH…………..726 DEPARTURE……-172
TOTAL HEATING UNITS FOR THE SEASON…………1813 DEPARTURE……-289
TOTAL HEATING UNITS LAST SEASON TO DATE…….1859 DEPARTURE…….-46
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)……….E40 NE @ 01:54 P.M.
VECTOR #1 (1-Sec)……….41 NE @ 01:54 P.M.
VECTOR #2 (1-Sec)……….40 NE @ 12:46 P.M.
DAVIS #1……………….37 NE @ 11:31 A.M.
DAVIS #2 ………………37 E @ 11:47 A.M.
RMY #1 (Instantaneous)…..40 ENE @ 11:41 A.M.
RMY #2 (Instantaneous)…..41 NE @ 12:19 P.M.
MERLIN…………………36 ENE
RICHARDS (C5C) (Inst)……36 @ 01:01 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………28 NE @ 01:36 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..26 @ 12:47 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..28 @ 12:47 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………27 NE @ 01:36 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………27 ENE @ 12:47 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..26 NE @ 12:47 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..27 NE @ 12:47 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………25 @ 12:47 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……15.4 NE [370 total miles]
VECTOR #1…………….14.9
VECTOR #2…………….15.5
DAVIS #1……………..15.3 NE
DAVIS #2……………..15.2 NE
RMY #1……………….14.5 NNE
RMY #2……………….15.1 NE
RICHARDS (C5C)………..14.8
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.57 DEPARTURE…..+0.42
TOTAL PRECIPITATION FOR THE MONTH…………..7.22 DEPARTURE…..+2.31
TOTAL PRECIPITATION FOR THE YEAR…………..58.59 DEPARTURE…..+5.21
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.5
TOTAL SNOWFALL FOR THE MONTH………………..0.3 DEPARTURE…..-10.7
TOTAL SNOWFALL FOR THE SEASON (2023-2024)…….0.3 DEPARTURE…..-13.2
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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/-12/0.00/0.0/121/22 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 34/22/28/-5/0.00/0.0/520/95 31 SW VEC1 31 SW RMY 32
12/15 53/30/42/+9/0.00/0.0/541/99 31 WNW VEC1 30 WNW RMY 28
12/16 50/36/43/+11/0.00/0.0/530/97 21 ESE VEC1 22 ESE RMY 22
12/17 55/37/46/+14/0.47/0.0/098/18 40 SSE VEC1 41 SSE RMY 41
12/18 61/42/52/+20/2.47/0.0/000/00 90 SSE VEC1 95 SSE RMY 101
12/19 46/30/38/+6/0.00/0.0/332/61 28 NW VEC1 28 NW RMY 26
12/20 41/26/34/+3/0.00/0.0/540/99 26 NNW VEC1 27 NNW RMY 28
12/21 34/20/27/-4/0.00/0.0/534/98 29 NNW VEC1 30 NNW RMY 28
12/22 34/16/25/-6/0.00/0.0/540/99 18 NNW VEC1 18 NNW RMY 19
12/23 42/26/34/+3/0.00/0.0/414/76 18 SSW VEC1 18 SSW RMY 16
12/24 46/35/41/+11/0.01/0.0/000/00 16 SE VEC1 16 SE RMY 16
12/25 53/41/47/+17/0.01/0.0/409/75 15 ENE VEC1 15 SE RMY 14
12/26 52/32/42/+12/0.00/0.0/245/45 18 SW VEC1 18 SW RMY 19
12/27 52/39/45/+15/0.02/0.0/000/00 18 SW VEC1 18 SW RMY 19
12/28 44/39/42/+13/0.72/0.0/000/00 40 NE VEC1 41 NE RMY 40
12/29 The low since midnight is 38F, the daily normal low is 21F
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DECEMBER DAILY RECORDS TO DATE
12/18: RECORD MAXIMUM TEMPERATURE OF 61F;
BEATS OLD RECORD OF 59F SET IN 1928
12/18: RECORD PRECIPITATION OF 2.47 INS;
BEATS OLD RECORD OF 1.44 INS SET IN 1915
12/18: RECORD PEAK WIND GUST OF 90 MPH;
BEATS OLD RECORD OF 76e MPH SET IN 1978
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DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR DECEMBER 29
HIGH 72 IN 1984
LOW -19 IN 1933 (RECORD FOR DECEMBER)
PRECIP 1.89 INS. IN 1945
SNOWFALL 18.4 INS. IN 1945
PEAK GUST 95 MPH S IN 1966 (RECORD FOR DECEMBER)
RECORDS FOR DECEMBER 30
HIGH 60 IN 1984
LOW -18 IN 1933
PRECIP 1.54 INS. IN 1942
SNOWFALL 7.5 INS. IN 1956
PEAK GUST 81 MPH WNW IN 1962
TODAY’S REPORT PREPARED BY: Matt Douglas
