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BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
TUESDAY, DECEMBER 8, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME
CLOUDY AND COLD FOLLOWING EARLY MORNING FLURRIES…
Several hours of very light snow flurries occurred overnight
into early this morning thanks to some ocean effect, however
no accumulation resulted.
Otherwise it’s been a cloudy and cold day here on the summit
as the temperature has failed to make it to 30 degrees today.
Today is the first sub 30 degree day since way back on
February 15th, when the high was 27 degrees!
It has been a bit breezy at times, adding a bite to the cold.
Occasional gusts between 20-25 MPH have been observed.
Visibility has been limited today to only 30-40 miles.
The high so far today is 29F, 13 degrees below the daily
normal high of 42F. The low since midnight is 24F, 2 degrees
below the normal low of 26F.
PRELIMINARY STATS FOR NOVEMBER 2020
TEMPERATURE, Deg. F
Avg. Max. 56.3 [+6.3]
Avg. Min. 38.6 [+5.1]
Mean 47.5 [+5.8]
24-hour corrected mean: 46.9
Max. for month: 75F on the 7th
Min. for month: 18F on the 19th
HEATING DEGREE DAYS
Total heating units: 521 [-177]
Total for the season: 973 [-288]
Total for last season: 1237
PRECIPITATION, Inches
Total: 5.23 [+1.77]
Greatest in 24 hrs: N/A
SNOWFALL, Inches
Total: TRACE
Greatest in 24 hrs: T on the 2nd
WIND, mph
Avg. uncorrected wind speed: 12.9 mph
Avg. corrected wind speed: 13.2 mph
Prevailing wind direction: SSW [14%]
Peak gust and direction: 81 SSE on the 30th
SUNSHINE:
Campbell-Stokes card minutes: 9066 minutes of a possible 17010 or 53%
Astronomical total minutes: 9382 minutes of a possible 17593 or 53%
Today’s Observations:
7 A.M.
Weather: Broken stratocumulus, overcast stratus, light snow shower
Temperature: 25F; Dew Point: 20F; Relative Humidity: 81%
Wind: N at 13G20 kts
Sea-level pressure: 29.65 in Hg; rising, then falling
Visibility: 30 miles
6-hr Max temp: 25F
6-hr Min temp: 24F
24-hr Precip: Trace.
24-hr Snow: Trace.
Snow Depth: 1 ins.
BHO SA 1155 E20 BKN 30 OVC 30SW- 042/25/20/3613G20/965/ HIER CLDS
VSBL DSNT N-NNE PCPN VRY LGT/ 8/5// 4/001 50002 6000/ 70000 10025
20024
10 A.M.
Weather: Broken stratocumulus, overcast stratus
Temperature: 27F; Dew Point: 20F; Relative Humidity: 75%
Wind: NW at 12G20 kts
Sea-level pressure: 29.70 in Hg; rising, then more slowly
Visibility: 40 miles, hazy
3-hr Precip: Trace.
3-hr Snow: Trace.
BHO SA 1455 E20 BKN 40 OVC 40 056/27/20/3212G20/970/ HAZY/ 8/5//
51014 6000/
1 P.M.
Weather: Broken stratocumulus, broken stratocumulus standing lenticular,
broken cirrus
Temperature: 29F; Dew Point: 21F; Relative Humidity: 72%
Wind: NW at 12G18 kts
Sea-level pressure: 29.66 in Hg; rising, then falling
Visibility: 40 miles, hazy
6-hr Max temp: 29F
6-hr Min temp: 25F
6-hr Precip: Trace.
6-hr Snow: Trace.
Snow Depth: 1 ins.
BHO SA 1755 E20 BKN 40 BKN 180 BKN 40 044/29/21/3212G18/966/ VIRGA
DSNT E-ESE HAZY/ 8/502 4/001 58012 6000/ 10029 20025
SUMMARY FOR MONDAY, DECEMBER 7, 2020
TEMPERATURE (DEGREES F)
MAX…….33 NORMAL…..42
MIN…….22 NORMAL…..27
MEAN……28 NORMAL…..34
DEPARTURE FROM 30-YEAR NORMAL………………. -6
TOTAL DEPARTURE FOR THE MONTH………………. +24 [+3.2 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………37 DEPARTURE…….+6
TOTAL HEATING UNITS FOR THE MONTH…………..183 DEPARTURE……-24
TOTAL HEATING UNITS FOR THE SEASON…………1156 DEPARTURE…..-313
TOTAL HEATING UNITS LAST SEASON TO DATE…….1495 DEPARTURE…..-339
PEAK WIND GUST FOR YESTERDAY (MPH):
420C/Official…………..24 NW AT 10:25 A.M.
AEROVANE (south tower)…..26 NW AT 9:43 A.M.
ASOS…………………..25 NW AT 10:13 A.M.
DAVIS #1……………….25 W AT 1:08 A.M.
DAVIS #2 (south tower)…..24 WNW AT 9:47 A.M.
RMY……………………26
VECTOR…………………28
MERLIN…………………N/A
FASTEST MILE FOR YESTERDAY:
CONTACTING/OFFICIAL………………………..18 W AT 1:04 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….17 NW AT 10:16 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………19 NW AT 10:15 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………18 W AT 1:13 A.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…… 9.5 W [229 total miles]
ASOS…………………10.0 [240 total miles]
DAVIS #1……………..10.2 NW [245 total miles]
DAVIS #2……………..10.3 NW [247 total miles]
RMY…………………. 9.2 NW [221 total miles]
VECTOR……………….10.0 [240 total miles]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……TRACE DEPARTURE….-0.17
ASOS………….0.00
TOTAL PRECIPITATION FOR THE MONTH………….2.81 DEPARTURE….+1.65
ASOS………….2.89
TOTAL PRECIPITATION FOR THE YEAR………….47.38 DEPARTURE….-0.48
ASOS………..48.33
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HOURS ENDING 7 A.M………TRACE DEPARTURE…..-0.3
TOTAL SNOWFALL FOR THE MONTH……………….2.8 DEPARTURE…..+0.7
TOTAL SNOWFALL FOR THE SEASON………………9.3 DEPARTURE…..+4.6
PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 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
11/01 49/36/43/-3/0.69/0.0/006/01 38 W AERO 40 W RMY 39
11/02 40/31/36/-10/T/T/425/69 61 WNW AERO 62 WNW RMY 62
11/03 43/29/36/-10/0.00/0.0/473/77 48 WNW AERO 53 WNW RMY 48
11/04 54/30/42/-3/0.00/0.0/550/90 30 SSW AERO 30 SSW RMY 30
11/05 69/49/59/+14/0.00/0.0/548/90 37 SSW AERO 40 SSW RMY 38
11/06 72/55/64/+19/0.00/0.0/394/65 28 SW AERO 28 SW RMY M
11/07 75/54/65/+20/0.00/0.0/562/93 21 WSW AERO 21 WSW RMY 21
11/08 73/54/64/+20/0.00/0.0/584/97 18 W AERO 18 W RMY 19
11/09 74/52/63/+19/0.00/0.0/593/99 20 WSW AERO 18 WSW RMY 21
11/10 74/53/64/+20/0.00/0.0/597/100 30 SW AERO 28 SW RMY 31
11/11 73/58/66/+23/0.04/0.0/137/23 40 SW AERO 44 SW RMY 45
11/12 64/46/55/+12/0.04/0.0/000/00 32 NNW AERO 31 NNW RMY 33
11/13 48/38/43/0/0.30/0.0/000/00 22 NW AERO 21 NW RMY 25
11/14 49/32/41/-1/0.00/0.0/276/47 26 NW AERO 28 NW RMY 29
11/15 58/30/44/+2/0.62/0.0/311/53 60 S AERO 67 S RMY 65
11/16 53/39/46/+4/0.00/0.0/526/90 40 WNW AERO 41 WNW RMY 43
11/17 47/32/40/-1/0.00/0.0/204/35 28 NW AERO 28 NW RMY 30
11/18 32/19/26/-15/0.00/0.0/580/100 40 NW AERO 46 NW RMY 43
11/19 44/18/31/-10/0.00/0.0/393/68 37 SW AERO 39 SW RMY 43
11/20 63/44/54/+14/0.00/0.0/495/86 33 SSW AERO 35 SSW RMY 37
11/21 62/40/51/+11/0.00/0.0/339/59 24 W AERO 23 W RMY 27
11/22 45/33/39/-1/T/0.0/006/01 28 SE AERO 28 SE RMY 31
11/23 58/32/45/+6/1.77/0.0/000/00 42 WNW AERO 48 WNW RMY 46 TSTM
11/24 42/27/35/-4/0.00/0.0/569/100 31 WNW AERO 32 WNW RMY 33
11/25 50/26/38/-1/0.01/0.0/017/03 23 SSE AERO 23 SSE RMY 26
11/26 58/45/52/+14/0.36/0.0/000/00 36 S AERO 37 S RMY 41
11/27 53/46/50/+12/0.00/0.0/056/10 23 WNW AERO 23 WNW RMY 23
11/28 52/36/44/+6/T/0.0/180/32 28 WNW AERO 30 WNW RMY 27
11/29 52/33/43/+6/0.00/0.0/561/100 21 SSW AERO 21 SSW RMY 22
11/30 62/40/51/+14/1.35/0.0/000/00 81 SSE AERO 82 SSE RMY 86
DAILY RECORDS FOR NOVEMBER 2020
11/06/20: DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 72F,
BREAKS PREVIOUS RECORD OF 71F SET IN 1959 AND 2015
11/07/20: DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 75F,
TIES PREVIOUS RECORD OF 75F SET IN 1938
11/08/20: DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 73F,
BREAKS PREVIOUS RECORD OF 72F SET IN 1938
11/09/20: DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 74F,
BREAKS PREVIOUS RECORD OF 72F SET IN 1975
11/11/20: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 58F,
BREAKS PREVIOUS RECORD OF 56F IN 2002
DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 73F,
BREAKS PREVIOUS RECORD OF 68F IN 1984
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
12/01 62/40/51/+14/0.61/0.0/…/.. 60 S AERO 67 W RMY 64
12/02 42/32/37/+1/0.00/0.0/…/.. 32 SW AERO 32 SW RMY 35
12/03 49/30/40/+4/0.00/0.0/…/.. 25 SSW AERO 25 SSW RMY 28
12/04 58/40/49/+14/0.06/0.0/…/.. 35 SSW AERO 35 SSW RMY 37
12/05 42/32/37/+2/2.13/2.8/…/.. 58 NNW AERO 58 NNW RMY 67
12/06 34/26/30/-5/0.01/T/…/.. E44 WNW AERO 44 WNW RMY 49
12/07 33/22/28/-6/T/T/…/.. 24 NW AERO 26 NW RMY 26
12/08 The low since midnight is 24F, 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 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: Matt Douglas
