Wednesday, December 2, 2020

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

WEDNESDAY, DECEMBER 2, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

INCREASINGLY CLOUDY WHILE STILL MAINTAINING
GREAT VISIBILITY….

Today we observed a great visibility of 80 miles under
overcast skies in the afternoon hours. Wind was significant
today, reaching a little over 30 mph by the 1 P.M. observation.
Wind is southwesterly at an average of 15 mph. With the rain
that happened a couple days ago (storm total of 1.69 inches),
we are at an annual rain deficit of only 1.68 inches at this
point, bringing us almost completely out of drought status.

The high so far today is 41F, 3 degrees below the daily
normal high of 44F. The low since midnight is 32F, 4 degrees
above the normal low of 28F.

Today’s Observations:

7 A.M.
Weather: Scattered altocumulus
Temperature: 32F; Dew Point: 22F; Relative Humidity: 65%
Wind: SW at 11 kts
Sea-level pressure: 29.86 in Hg; falling, then rising
Visibility: 75 miles
6-hr Max temp: 39F
6-hr Min temp: 32F
24-hr Precip: 0.00 ins.
24-hr Snow: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 100 SCT 75 111/32/22/2311/986/ 8/070 51012
10039 20032

10 A.M.
Weather: Scattered altocumulus
Temperature: 39F; Dew Point: 23F; Relative Humidity: 52%
Wind: SW at 16G23 kts, peak of 30 mph at 9:40 A.M.
Sea-level pressure: 29.89 in Hg; steady, then rising
Visibility: 80 miles
3-hr Precip: 0.00 ins.
3-hr Snow: 0.0 ins.
BHO SA 1455 100 SCT 80 120/39/23/2316G23/989/ PK WND 2226/40/
8/070 51009

1 P.M.
Weather: Scattered stratocumulus, broken altocumulus,
broken cirrostratus
Temperature: 40F; Dew Point: 27F; Relative Humidity: 58%
Wind: SSW at 16G23 kts, peak wind 30 MPH SW at 11:53 A.M.
Sea-level pressure: 29.86 in Hg; falling, then steady
Visibility: 80 miles
6-hr Max temp: 41F
6-hr Min temp: 32F
6-hr Precip: 0.00 ins.
6-hr Snow: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 50 SCT 100 BKN 250 BKN 80 109/40/27/2016G23/986/
PK WND 2326/1553/ 8/877 58011 10041 20032

SUMMARY FOR TUESDAY, DECEMBER 1, 2020

TEMPERATURE (DEGREES F)
MAX…….62   NORMAL…..44
MIN…….40   NORMAL…..29
MEAN……51   NORMAL…..37

DEPARTURE FROM 30-YEAR NORMAL………………. +14
TOTAL DEPARTURE FOR THE MONTH………………. +14 [+13.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………14  DEPARTURE……-14
TOTAL HEATING UNITS FOR THE MONTH……………14  DEPARTURE……-15
TOTAL HEATING UNITS FOR THE SEASON………….987  DEPARTURE…..-303
TOTAL HEATING UNITS LAST SEASON TO DATE…….1278  DEPARTURE…..-291

PEAK WIND GUST FOR YESTERDAY (MPH):
420C/Official…………..60 S    AT  12:12 A.M.
AEROVANE (south tower)…..67 S    AT  12:12 A.M.
ASOS…………………..59 S    AT  12:14 A.M.
DAVIS #1……………….60 S    AT  12:13 A.M.
DAVIS #2 (south tower)…..70 SSE  AT  12:24 A.M.
RMY……………………64
VECTOR…………………72
MERLIN…………………N/A

FASTEST MILE FOR YESTERDAY:
CONTACTING/OFFICIAL………………………..45 S    AT  12:25 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….41 S    AT  12:27 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………45 SSE  AT  12:14 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………51 SSE  AT  12:26 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……20.2 S    [485 total miles] ASOS…………………19.8      [475 total miles] DAVIS #1……………..19.0 SSW  [456 total miles] DAVIS #2……………..21.1 S    [506 total miles] RMY………………….19.4      [467 total miles] VECTOR……………….19.8      [489 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….+0.45
ASOS………….0.65
TOTAL PRECIPITATION FOR THE YEAR………….47.01  DEPARTURE….-1.68
ASOS………..47.98

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HOURS ENDING 7 A.M………..0.0  DEPARTURE…..-0.2
TOTAL SNOWFALL FOR THE MONTH……………….0.0  DEPARTURE…..-0.2
TOTAL SNOWFALL FOR THE SEASON………………6.5  DEPARTURE…..+3.7

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

12/2 The low since midnight is 58F, the daily normal low is 29F

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

RECORDS FOR DECEMBER 2
HIGH 61 IN 1998
LOW 3 IN 1890
PRECIP 2.09 INS. IN 1974
SNOWFALL 5.0 INS. IN 1894, 1929
PEAK GUST 89e MPH SSE IN 1942

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

TODAY’S REPORT PREPARED BY: Benjamin Turner