Monday, November 9, 2020

| November 9, 2020 | Reply

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

MONDAY, NOVEMBER 9, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

RECORD WARMTH CONTINUES FOR THE FOURTH CONSECUTIVE DAY…

The big story of the last few days has certainly been
the warmth that has overspread the region. Today marks
the fourth consecutive day of record high temperatures
here at the Observatory. So far today the high has been
74 degrees, which beats the previous record for the
date of 72 degrees set back in 1975.

The 3 previous days records were as follows…

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

In addition to the warmth, an abundance of sunshine has
been observed today with mainly clear skies dominating,
the only clouds have been a few cirrus off in the distance.

As is normally the case under a big ridge of high pressure,
the atmosphere is a bit inverted. This has been the reason
for a rather impressive smoke layer the last few days. From
the observatory this looks like a brownish layer near the
horizon in all quadrants. Today it’s more impressive off to
the north and northeast, likely where surface temperatures
are a bit cooler due to marine influence, thus creating a
stronger inversion in those areas.

Thanks to the smoke and haze, visibility has been limited
today, only 25-35 miles this morning, improving a bit to
50 miles early this afternoon.

The wind has been quite light today, generally out of a
west-northwesterly direction, but hanging out at less than
10 mph. The average speed since 7 A.M. has only been
around 6 mph!

With only one notable precipitation event for the month
to date, we are currently running at a monthly deficit of
greater than a half inch, and a yearly deficit of more
than 3 inches.

The maximum temperature so far today is 74 degrees, this
is 22 degrees above the normal high of 52 degrees. The
minimum temperature since midnight has been 52 degrees,
this is 17 degrees above the normal low of 35 degrees.

Today’s Observations:

7 A.M.
Weather: Clear, few cirrus distant SE-SSW, patchy thin
ground fog all quadrants, thin smoke layer all quadrants
below inversion
Temperature: 55F; Dew Point: 40F; Relative Humidity: 56%
Wind: WSW at 10 kts
Sea-level pressure: 30.33 ins. Hg: steady then rising
Visibility: 25 miles, hazy
6-hr Max temp: 56F
6-hr Min temp: 52F
24-hr Precip: 0.00 ins.
24-hr Snow: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 CLR 25 271/55/40/2510/033/ FEW CI DSNT SE-SSW
PTCHY THN GF ALQDS THN K LYR ALQDS BLW INVRSN HAZY/
8/001 53004 10056 20052

10 A.M.
Weather: Clear, few cirrus distant NW-NE, thin smoke layer
all quadrants
Temperature: 64F; Dew Point: 41F; Relative Humidity: 42%
Wind: WNW at 5 kts, wind light
Sea-level pressure: 30.33 ins. Hg: rising then falling
Visibility: 35 miles, hazy
3-hr Precip: 0.00 ins.
3-hr Snow: 0.0 ins.
BHO SA 1455 CLR 35 271/64/41/3005/033/ FEW CI DSNT NW-NE
THN K LYR ALQDS HAZY WND LGT/ 8/001 50000

1 P.M.
Weather: Clear, few cirrus distant NW-NE, thin smoke layer
all quadrants
Temperature: 74F; Dew Point: 37F; Relative Humidity: 26%
Wind: WNW at 4 kts, wind light
Sea-level pressure: 30.29 ins. Hg: falling, then more rapidly
Visibility: 50 miles, hazy
6-hr Max temp: 74F
6-hr Min temp: 55F
6-hr Precip: 0.00 ins.
6-hr Snow: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 CLR 50 256/74/37/3004/029/ FEW CI DSNT NW-NE
THN K LYR ALQDS HAZY WND LGT/ 8/001 58015 10074 20055

SUMMARY FOR SUNDAY, NOVEMBER 8, 2020

TEMPERATURE (DEGREES F)
MAX…….73   NORMAL…..53
MIN…….54   NORMAL…..36
MEAN……64   NORMAL…..44

DEPARTURE FROM 30-YEAR NORMAL……………….+20
TOTAL DEPARTURE FOR THE MONTH……………….+47 [+5.7 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………….1  DEPARTURE……-20
TOTAL HEATING UNITS FOR THE MONTH…………..111  DEPARTURE……-47
TOTAL HEATING UNITS FOR THE SEASON………….563  DEPARTURE…..-158
TOTAL HEATING UNITS LAST SEASON TO DATE……..610  DEPARTURE……-47

PEAK WIND GUST FOR YESTERDAY (MPH):
420C/Official…………..18 W    AT  1:12 A.M.
AEROVANE (south tower)…..18 W    AT  1:11 A.M.
ASOS…………………..19 W    AT  1:11 A.M.
DAVIS #1……………….19 W    AT  1:10 A.M.
DAVIS #2 (south tower)…..20 W    AT  1:10 A.M.
MERLIN…………………N/a
RMY……………………19
VECTOR…………………21

FASTEST MILE FOR YESTERDAY:
CONTACTING/OFFICIAL………………………..16 W    AT  1:13 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….15 W    AT  1:12 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………16 WNW  AT  1:11 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………16 W    AT  1:12 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……. 8.2 SSE [197 total miles]
DAVIS #1……………… 8.7 NW  [209 total miles]
DAVIS #2 (south tower)…. 9.0 NNW [216 total miles]
ASOS…………………. 8.4     [202 total miles]
VECTOR……………….. 8.9     [214 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………….0.69  DEPARTURE….-0.56
ASOS………….0.71
TOTAL PRECIPITATION FOR THE YEAR………….41.86  DEPARTURE….-3.16
ASOS………..42.66

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…..-0.3
TOTAL SNOWFALL FOR THE SEASON………………6.5  DEPARTURE…..+5.9

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/…/..               22 NNW   AERO 22 NNW  RMY N/A
10/28  49/42/46/-2/0.33/…/..           18 W     AERO 18 W    RMY 18
10/29  46/41/44/-3/1.26/…/..           39 NE    AERO 38 NE   RMY 38
10/30  41/26/34/-13/0.94/…/..          37 NNE   AERO 44 NNE  RMY N/A
10/31  39/24/32/-15/0.00/…/..          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 The low since midnight is 52F, 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

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

RECORDS FOR NOVEMBER 9
HIGH 72 IN 1975
LOW 17 IN 1971
PRECIP 1.37 INCHES IN 1969
SNOWFALL 0.2 IN 1921,1923
PEAK GUST 73e S IN 1943

RECORDS FOR NOVEMBER 10
HIGH 75 IN 1931
LOW 20 IN 2004
PRECIP 2.11 INCHES IN 1888
SNOWFALL 2.2 IN 1987
PEAK GUST 83e S IN 1942

TODAY’S REPORT PREPARED BY: Matt Douglas

Category: Daily Discussions

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