Monday, November 16, 2020

| November 16, 2020 | Reply

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

MONDAY, NOVEMBER 16, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

BRISK AND COOL FOLLOWING A COLD FRONTAL PASSAGE LAST
EVENING….

A strong cold front came through last evening
bringing with it a period of heavy rain totaling
0.67″ and strong wind gusts. A peak gust to 60 mph
occurred twice, once at 10 P.M. and again at
11:13 P.M., the latter coming with the actual
frontal passage.

Today we’re seeing a mix of sun and clouds with
a brisk westerly wind blowing. Gusts of 30-40 mph
have been common since about mid morning into early
this afternoon.

Visibility has been decent, holding between 60-70
miles today.

The high so far today is 52F, 2 degrees above the
daily normal high of 50F. The low since midnight
is 43F, 9 degrees above the normal low of 34F.

PRELIMINARY STATS FOR OCTOBER 2020

TEMPERATURE, Deg. F
Avg. Max. 61.2 [+0.9]
Avg. Min. 45.5 [+2.6]
Mean      53.4 [+1.8]
24-hour corrected mean: 52.7
Max. for month: 75F on the 1st and 10th
Min. for month: 24F on the 31st

HEATING DEGREE DAYS
Total heating units:   354  [-67]
Total for the season:  452 [-111]
Total for last season: 440

COOLING DEGREE DAYS
Total cooling units:      1  [-4]
Total for the season:   831  [+229]
Total for last season:  682

PRECIPITATION, Inches
Total: 6.75 [+2.06]
Greatest in 24 hrs: 2.24 inches on the 16-17th

SNOWFALL, Inches
Total: 6.5 [+6.2]
Greatest in 24 hrs: 6.5 inches on the 30th

WIND, mph
Avg. uncorrected wind speed: 10.7 mph
Avg. corrected wind speed:   11.3 mph
Prevailing wind direction:   S [12%]
Peak gust and direction:     76 S on the 7th

SUNSHINE:
Campbell-Stokes card minutes: 10008 minutes of a possible 19824 or 50%
Astronomical total minutes: 10345 minutes of a possible 20500 or 50%

Today’s Observations:

7 A.M.
Weather: Scattered stratocumulus, virga distant NE
Temperature: 43F; Dew Point: 34F; Relative Humidity: 70%
Wind: WSW at 12 kts
Sea-level pressure: 29.78 ins. Hg: falling then rising
Visibility: 60 miles
6-hr Max temp: 49F
6-hr Min temp: 43F
24-hr Precip: 0.67 ins.
24-hr Snow: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 60 SCT 60 086/43/34/2512/978/ VIRGA DSNT NE/
8/500 53006 6001 70067 10049 20043

10 A.M.
Weather: Scattered stratocumulus
Temperature: 48F; Dew Point: 27F; Relative Humidity: 43%
Wind: W at 18G28 kts, peak wind 32 mph W at 9:51 A.M.
Sea-level pressure: 29.82 ins. Hg: rising then falling
Visibility: 70 miles
3-hr Precip: 0.00 ins.
3-hr Snow: 0.0 ins.
BHO SA 1455 60 SCT 70 099/48/27/2618G28/982/ PK WND 2628/51/
8/500 50013

1 P.M.
Weather: Broken stratocumulus
Temperature: 52F; Dew Point: 28F; Relative Humidity: 39%
Wind: W at 17G26 kts, peak wind 32 mph W at 12:33 P.M.
Sea-level pressure: 29.83 ins. Hg: rising, then more slowly
Visibility: 60 miles
6-hr Max temp: 52F
6-hr Min temp: 43F
6-hr Precip: 0.00 ins.
6-hr Snow: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 E55 BKN 60 102/52/28/2817G26/983/ PK WND 2828/33/
8/500 51003 10052 20043

SUMMARY FOR SUNDAY, NOVEMBER 15, 2020

TEMPERATURE (DEGREES F)
MAX…….58   NORMAL…..51
MIN…….30   NORMAL…..34
MEAN……44   NORMAL…..42

DEPARTURE FROM 30-YEAR NORMAL……………….  +2
TOTAL DEPARTURE FOR THE MONTH……………….+122 [+7.9 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………21  DEPARTURE…… -2
TOTAL HEATING UNITS FOR THE MONTH…………..191  DEPARTURE…..-121
TOTAL HEATING UNITS FOR THE SEASON………….643  DEPARTURE…..-232
TOTAL HEATING UNITS LAST SEASON TO DATE……..825  DEPARTURE…..-218

PEAK WIND GUST FOR YESTERDAY (MPH):
420C/Official…………..60 S    AT 11:13 P.M.
AEROVANE (south tower)…..67 S    AT 11:17 P.M.
ASOS…………………..59 S    AT 10:05 P.M.
DAVIS #1……………….59 S    AT 10:52 P.M.
DAVIS #2 (south tower)…..66 S    AT 10:04 P.M.
RMY……………………65
VECTOR…………………66
MERLIN…………………59

FASTEST MILE FOR YESTERDAY:
CONTACTING/OFFICIAL………………………..43 S    AT 11:13 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….44 S    AT 11:16 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………40 S    AT  9:48 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………49 S    AT 11:16 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……14.8 SSE [354 total miles]
ASOS…………………14.3     [343 total miles]
DAVIS #1……………..14.6 S   [350 total miles]
VECTOR……………….14.7     [353 total miles]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….0.67  DEPARTURE….+0.52
ASOS………….0.70
TOTAL PRECIPITATION FOR THE MONTH………….1.74  DEPARTURE….-0.61
ASOS………….1.78
TOTAL PRECIPITATION FOR THE YEAR………….42.91  DEPARTURE….-3.21
ASOS………..43.73

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HOURS ENDING 7 A.M………..0.0  DEPARTURE……0.0
TOTAL SNOWFALL FOR THE MONTH……………..Trace  DEPARTURE…..-0.6
TOTAL SNOWFALL FOR THE SEASON………………6.5  DEPARTURE…..+5.6

PRELIMINARY CLIMATE SUMMARY FOR OCTOBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/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

10/01  75/56/66/+9/0.00/591/84           28 SW    AERO 28 SW   RMY N/A
10/02  63/49/56/-1/0.02/203/29           20 NW    AERO 21 NW   RMY 20
10/03  65/45/55/-1/0.00/676/97           19 WNW   AERO 19 WNW  RMY 19
10/04  65/45/55/-1/0.00/659/95           17 ESE   AERO 18 ESE  RMY 18
10/05  62/52/57/+1/0.00/277/40           17 ENE   AERO 17 ENE  RMY N/A
10/06  69/51/60/+5/0.00/503/73           28 S     AERO 28 S    RMY 29
10/07  73/50/62/+7/0.14/316/46           76 W     AERO 74 W    RMY 70  TSTM
10/08  61/42/52/-2/0.00/676/99           41 W     AERO 41 W    RMY N/A
10/09  60/37/49/-5/0.00/646/95           25 SSW   AERO 28 SSW  RMY N/A
10/10  75/52/64/+10/0.00/549/81          40 SSW   AERO 40 SSW  RMY 38
10/11  64/47/56/+3/0.00/574/85           32 NNW   AERO 35 NNW  RMY N/A
10/12  52/48/50/-3/T/000/00              28 E     AERO 27 E    RMY N/A
10/13  57/49/53/0/1.74/000/00            32 E     AERO 33 E    RMY N/A
10/14  67/47/57/+5/0.00/606/91           23 WNW   AERO 25 WNW  RMY N/A
10/15  71/50/61/+9/0.00/511/77           43 S     AERO 46 S    RMY 42
10/16  68/48/58/+7/1.00/020/03           28 S     AERO 30 S    RMY N/A
10/17  56/39/48/-3/1.24/480/73           35 WNW   AERO 40 WNW  RMY 37
10/18  60/46/53/+2/0.00/622/95           20 ESE   AERO 21 ESE  RMY 20
10/19  61/46/54/+4/0.00/575/88           16 ESE   AERO 16 SSE  RMY N/A
10/20  66/49/58/+8/0.00/065/10           22 S     AERO 22 S    RMY 22
10/21  71/56/64/+14/0.06/000/00          26 SSW   AERO 26 SSW  RMY 26
10/22  70/54/62/+13/0.00/471/73          18 SSW   AERO 17 SSW  RMY N/A
10/23  68/52/60/+11/0.00/340/53          18 ESE   AERO 18 ESE  RMY 18
10/24  68/42/55/+6/0.00/217/34           32 NNW   AERO 32 NNW  RMY 32
10/25  50/40/45/-4/0.00/134/21           19 NNW   AERO 19 NNW  RMY N/A
10/26  52/43/48/0/0.02/000/00            20 E     AERO 18 ESE  RMY 20
10/27  52/43/48/0/T/038/06               22 NNW   AERO 22 NNW  RMY N/A
10/28  49/42/46/-2/0.33/000/00           18 W     AERO 18 W    RMY 18
10/29  46/41/44/-3/1.26/000/00           39 NE    AERO 38 NE   RMY 38
10/30  41/26/34/-13/0.94/000/00          37 NNE   AERO 44 NNE  RMY N/A
10/31  39/24/32/-15/0.00/596/96          18 SSE   AERO 20 SSE  RMY 17

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/…/..      38 W     AERO 40 W    RMY 39
11/02   40/31/36/-10/T/T/…/..          61 WNW   AERO 62 WNW  RMY 62
11/03   43/29/36/-10/0.00/0.0/…/..     48 WNW   AERO 53 WNW  RMY 48
11/04   54/30/42/-3/0.00/0.0/…/..      30 SSW   AERO 30 SSW  RMY 30
11/05   69/49/59/+14/0.00/0.0/…/..     37 SSW   AERO 40 SSW  RMY 38
11/06   72/55/64/+19/0.00/0.0/…/..     28 SW    AERO 28 SW   RMY M
11/07   75/54/65/+20/0.00/0.0/…/..     21 WSW   AERO 21 WSW  RMY 21
11/08   73/54/64/+20/0.00/0.0/…/..     18 W     AERO 18 W    RMY 19
11/09   74/52/63/+19/0.00/0.0/…/..     20 WSW   AERO 18 WSW  RMY 21
11/10   74/53/64/+20/0.00/0.0/…/..     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   The low since midnight is 43F, the daily normal low is 34F

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

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

RECORDS FOR NOVEMBER 16
HIGH 73 IN 1927
LOW 8 IN 1933
PRECIP 2.25 INCHES IN 1981
SNOWFALL 2.0 IN 1913
PEAK GUST 78 S IN 1989

RECORDS FOR NOVEMBER 17
HIGH 74 IN 1928
LOW 10 IN 1924
PRECIP 1.92 INCHES IN 1920
SNOWFALL 1.0 INS IN 1980
PEAK GUST 61 SSE IN 2006

TODAY’S REPORT PREPARED BY: Matt Douglas

Category: Daily Discussions

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