Thursday, November 12, 2020

| November 12, 2020 | Reply

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

THURSDAY, NOVEMBER 12, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

OVERCAST AND COOLER WITH SOME RAIN SHOWERS
IN THE MORNING….

Today was overcast with rain beginning in the mid-afternoon
hours, a light shower and left only 0.01 inches in the gauge
at the 1 P.M. observation. Last night was received 0.07
inches, measured at 7 A.M. Visibility opened up nicely
as the morning fog left, reaching 70 miles by noon.

The maximum temperature so far today is 63 degrees, this
is 11 degrees above the normal high of 52 degrees. The
minimum temperature since midnight has been 62 degrees,
this is 27 degrees above the normal low of 35 degrees.
That’s on track to be a record, but conditions are
cooling significantly as the day goes on. Over the past
6 hours, there has been a temperature drop of over
13 degrees!

PRELIMINARY STATS FOR OCTOBER 2020

TEMPERATURE, Deg. F
Avg. Max. 61.2 [+0.9]
Avg. Min. 45.5 [+1.6]
Mean      53.4 [+1.8]
24-hour corrected mean: 52.7
Max. for month: 75F on the 1st
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:  93

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

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: Broken stratus
Temperature: 63F; Dew Point: 63F; Relative Humidity: 100%
Wind: W at 7 kts
Sea-level pressure: 29.93 ins. Hg: falling, then rising
Visibility: 1 mile, fog
6-hr Max temp: 64F
6-hr Min temp: 63F
24-hr Precip: 0.07 ins.
24-hr Snow: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 35 OVC 1F 134/63/63/2707/993/ 8/6// 70007 53008
10064 20063

10 A.M.
Weather: Overcast stratus
Temperature: 58F; Dew Point: 56F; Relative Humidity: 93%
Wind: NW at 4 kts, light and variable
Sea-level pressure: 29.92 ins. Hg: falling steadily
Visibility: 20 miles, thin fog
3-hr Precip: 0.00 ins.
3-hr Snow: 0.0 ins.
BHO SA 1455 40 OVC 20 130/58/56/3204/992/ THN FG ALQDS WND L/V/
8/6// 58004

1 P.M.
Weather: Overcast stratus
Temperature: 55F; Dew Point: 44F; Relative Humidity: 67%
Wind: NNW at 12G27 kts, peak of 39 mph at 12:40 P.M.
Sea-level pressure: 29.92 ins. Hg: falling, then more slowly
Visibility: 70 miles
6-hr Max temp: 63F
6-hr Min temp: 54F
6-hr Precip: 0.01 ins.
6-hr Snow: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 30 OVC 70 129/55/44/34012G27/992/ PK WND 3428/40
8/6// 6001/ 55001 10063 20054

SUMMARY FOR WEDNESDAY, NOVEMBER 11, 2020

TEMPERATURE (DEGREES F)
MAX…….73   NORMAL…..52
MIN…….58   NORMAL…..35
MEAN……66   NORMAL…..43

DEPARTURE FROM 30-YEAR NORMAL……………….+23
TOTAL DEPARTURE FOR THE MONTH……………….+109 [+9.7 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………….0  DEPARTURE……-22
TOTAL HEATING UNITS FOR THE MONTH…………..114  DEPARTURE…..-108
TOTAL HEATING UNITS FOR THE SEASON………….566  DEPARTURE…..-219
TOTAL HEATING UNITS LAST SEASON TO DATE……..688  DEPARTURE…..-122

PEAK WIND GUST FOR YESTERDAY (MPH):
420C/Official…………..40 SW   AT 12:30 P.M.
AEROVANE (south tower)…..44 SW   AT 12:15 P.M.
ASOS…………………..39 WSW  AT 12:14 P.M.
DAVIS #1……………….40 N    AT 12:14 P.M.
DAVIS #2 (south tower)…..41 SW   AT 12:14 P.M.
MERLIN…………………42
RMY……………………45
VECTOR…………………47

FASTEST MILE FOR YESTERDAY:
CONTACTING/OFFICIAL………………………..30 SW   AT  1:04 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….33 SW   AT  1:03 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………29 W    AT 12:15 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………30 SW   AT 12:16 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….17.2 SSW [413 total miles]
DAVIS #1………………16.8 WSW [403 total miles]
DAVIS #2 (south tower)….17.6 SSW [422 total miles]
ASOS………………….16.4     [394 total miles]
VECTOR………………..17.4     [418 total miles]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….0.07  DEPARTURE….-0.09
ASOS………….0.07
TOTAL PRECIPITATION FOR THE MONTH………….0.76  DEPARTURE….-0.76
ASOS………….0.78
TOTAL PRECIPITATION FOR THE YEAR………….41.93  DEPARTURE….-3.56
ASOS………..42.73

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HOURS ENDING 7 A.M………..0.0  DEPARTURE…..-0.1
TOTAL SNOWFALL FOR THE MONTH……………..Trace  DEPARTURE…..-0.4
TOTAL SNOWFALL FOR THE SEASON………………6.5  DEPARTURE…..+5.8

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/…./…/…/..     40 SW    AERO 44 SW   RMY 45

11/12 The low since midnight is 54F, the daily normal low is 35F

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 12
HIGH 74 IN 1909
LOW 18 IN 1926
PRECIP 3.25 INCHES IN 1947
SNOWFALL 8.1 INCHES IN 1987
PEAK GUST 79e MPH NW IN 1947

RECORDS FOR NOVEMBER 13
HIGH 66 IN 1931, 1964
LOW 14 IN 1920
PRECIP 1.96 INCHES IN 1982
SNOWFALL 4.6 IN 2004
PEAK GUST 77 S IN 1982

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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