BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

THURSDAY, DECEMBER 3, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

MOSTLY SUNNY WITH GOOD VISIBILITY AND LIGHTER
WINDS IN COMPARISON TO YESTERDAY....

Today we observed a good visibility of 70 miles under
partly cloudy skies in the afternoon hours. Wind was significant
yesterday, reaching a 32 mph. Today we are seeing wind from 
the southwest, with an average speed of 15 mph. The max gust
so far is 24 mph. 

The high so far today is 47F, 3 degrees above the daily
normal high of 44F. The low since midnight is 30F, 2 degrees
above the normal low of 28F.  


Today's Observations:

7 A.M.
Weather: Clear, few stratocumulus
Temperature: 30F; Dew Point: 22F; Relative Humidity: 70%
Wind: SSW at 10 kts
Sea-level pressure: 30.13 in Hg; rising steadily
Visibility: 65 miles
6-hr Max temp: 36F
6-hr Min temp: 30F
24-hr Precip: 0.00 ins.
24-hr Snow: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 CLR 65 203/30/22/2210/013/ FEW SC ALQDS/ 
8/800 53016 10036 20030

10 A.M.
Weather: Scattered cirrostratus, few cumulus
Temperature: 40F; Dew Point: 23F; Relative Humidity: 50%
Wind: SSW at 12G16 kts
Sea-level pressure: 30.17 in Hg; steady, then rising
Visibility: 65 miles
3-hr Precip: 0.00 ins.
3-hr Snow: 0.0 ins.
BHO SA 1455 250 SCT 65 215/40/23/2212G16/017/ FEW CU ALQDS/ 
8/105 51012

1 P.M.
Weather: Scattered cirrostratus
Temperature: 46F; Dew Point: 23F; Relative Humidity: 40%
Wind: SSW at 13G17 kts
Sea-level pressure: 30.10 in Hg; falling, then steady
Visibility: 70 miles
6-hr Max temp: 47F
6-hr Min temp: 30F
6-hr Precip: 0.00 ins.
6-hr Snow: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 250 SCT 70 195/46/23/2213G17/010/ 8/008 56020 
10047 20030


SUMMARY FOR WEDNESDAY, DECEMBER 2, 2020 

TEMPERATURE (DEGREES F)
MAX.......42   NORMAL.....44 
MIN.......32   NORMAL.....28
MEAN......37   NORMAL.....36

DEPARTURE FROM 30-YEAR NORMAL................... +1
TOTAL DEPARTURE FOR THE MONTH................... +15 [+7.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............28  DEPARTURE.......-1
TOTAL HEATING UNITS FOR THE MONTH...............42  DEPARTURE......-16
TOTAL HEATING UNITS FOR THE SEASON............1015  DEPARTURE.....-304
TOTAL HEATING UNITS LAST SEASON TO DATE.......1312  DEPARTURE.....-297

PEAK WIND GUST FOR YESTERDAY (MPH):
                     420C/Official..............32 SW   AT  10:47 A.M.
                     AEROVANE (south tower).....32 SW   AT  10:43 A.M.
                     ASOS.......................34 SW   AT  10:48 A.M.
                     DAVIS #1...................32 SW   AT  10:47 A.M.
                     DAVIS #2 (south tower).....34 SW   AT  10:47 A.M.
                     RMY........................35      
                     VECTOR.....................37     
                     MERLIN.....................33

FASTEST MILE FOR YESTERDAY:
CONTACTING/OFFICIAL.............................23 SW   AT  11:18 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...................23 SW   AT  11:17 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE...............24 WSW  AT  10:48 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............24 SW   AT  10:48 A.M.

AVERAGE WIND SPEED AND DIRECTION:
                     CONTACTING/OFFICIAL......13.5 SW   [325 total miles]
                     ASOS.....................13.1      [314 total miles]
                     DAVIS #1.................13.6 WSW  [326 total miles]
                     DAVIS #2.................14.0 WSW  [336 total miles]
                     RMY......................13.1      [314 total miles]
                     VECTOR...................13.5      [317 total miles]


PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.......0.00  DEPARTURE....-0.16
                             ASOS.............0.00
TOTAL PRECIPITATION FOR THE MONTH.............0.61  DEPARTURE....+0.29
                             ASOS.............0.65
TOTAL PRECIPITATION FOR THE YEAR.............47.01  DEPARTURE....-1.84
                              ASOS...........47.98

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HOURS ENDING 7 A.M...........0.0  DEPARTURE.....-0.3
TOTAL SNOWFALL FOR THE MONTH...................0.0  DEPARTURE.....-0.5
TOTAL SNOWFALL FOR THE SEASON..................6.5  DEPARTURE.....+3.4


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/.../..     40 SW    AERO 44 SW   RMY 45
11/12   64/46/55/+12/0.04/0.0/.../..     32 NNW   AERO 31 NNW  RMY 33
11/13   48/38/43/0/0.30/0.0/.../..       22 NW    AERO 21 NW   RMY 25
11/14   49/32/41/-1/0.00/0.0/.../..      26 NW    AERO 28 NW   RMY 29
11/15   58/30/44/+2/0.62/0.0/.../..      60 S     AERO 67 S    RMY 65
11/16   53/39/46/+4/0.00/0.0/.../..      40 WNW   AERO 41 WNW  RMY 43
11/17   47/32/40/-1/0.00/0.0/.../..      28 NW    AERO 28 NW   RMY 30
11/18   32/19/26/-15/0.00/0.0/.../..     40 NW    AERO 46 NW   RMY 43
11/19   44/18/31/-10/0.00/0.0/.../..     37 SW    AERO 39 SW   RMY 43    
11/20   63/44/54/+14/0.00/0.0/.../..     33 SSW   AERO 35 SSW  RMY 37
11/21   62/40/51/+11/0.00/0.0/.../..     24 W     AERO 23 W    RMY 27
11/22   45/33/39/-1/T/0.0/.../..         28 SE    AERO 28 SE   RMY 31
11/23   58/32/45/+6/1.77/0.0/.../..      42 WNW   AERO 48 WNW  RMY 46 TSTM
11/24   42/27/35/-4/0.00/0.0/.../..      31 WNW   AERO 32 WNW  RMY 33
11/25   50/26/38/-1/0.01/0.0/.../..      23 SSE   AERO 23 SSE  RMY 26
11/26   58/45/52/+14/0.36/0.0/.../..     36 S     AERO 37 S    RMY 41
11/27   53/46/50/+12/0.00/0.0/.../..     23 WNW   AERO 23 WNW  RMY 23
11/28   52/36/44/+6/T/0.0/.../..         28 WNW   AERO 30 WNW  RMY 27
11/29   52/33/43/+6/0.00/0.0/.../..      21 SSW   AERO 21 SSW  RMY 22
11/30   62/40/51/+14/1.35/0.0/.../..     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/+41/..../0.0/.../..      60 S    AERO 67 W    RMY 64
12/02   42/32/37/+1/..../.../.../..       32 SW   AERO 32 SW   RMY 35

12/03 The low since midnight is 30F, the daily normal low is 28F


DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated): 

RECORDS FOR DECEMBER 3
HIGH 67 IN 2009
LOW  -1 IN 1890
PRECIP 2.10 INS. IN 1986
SNOWFALL 6.0 INS. IN 1963
PEAK GUST 73e MPH W IN 1942

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

TODAY'S REPORT PREPARED BY: Benjamin Turner