Wednesday, November 4, 2020

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

WEDNESDAY, NOVEMBER 4, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

SUNNY WITH EXCELLENT MORNING VISIBILITY
ATOP GREAT BLUE HILL….

Today we experienced clear skies and 85 miles of visibility.
Wind started off light and variable, but reached 16 mph
on average, with a max gust of 27 mph. High pressure
has moved into the region, bringing us dew points in the low
20’s.  However,  some moisture has moved in during the later
afternoon hours.

The high so far today is 52F, which is 2 degrees below the
daily normal maximum of 54F. The low since midnight is 30F,
which is 7 degrees below the daily normal minimum of 37F.

Today’s Observations:

7 A.M.
Weather: Scattered stratocumulus and altostratus
Temperature: 30F; Dew Point: 22F; Relative Humidity: 70%
Wind: W at 4 kts, light and variable
Sea-level pressure: 30.50 ins. Hg: rising, then more rapidly
Visibility: 85 miles
6-hr Max temp: 31F
6-hr Min temp: 30F
24-hr Precip: 0.0
24-hr Snow: 0.0
Snow Depth: 0 ins.
BHO SA 1155 40 SCT 120 SCT 85 330/30/22/2704/050/ WND L/V/
8/810 53013 10031 20030

10 A.M.
Weather: Few altocumulus
Temperature: 43F; Dew Point: 22F; Relative Humidity: 42%
Wind: S at 9 kts
Sea-level pressure: 30.52 ins. Hg: rising, then more slowly
Visibility: 80 miles
3-hr Precip: 0.00 ins.
3-hr Snow: 0.0 ins.
BHO SA 1455 CLR 80 338/43/22/1809/052/ FEW AC ALQDS/ 8/080
50008

1 P.M.
Weather: Few cumulus
Temperature: 51F; Dew Point: 35F; Relative Humidity: 53%
Wind: S at 9G15 kts
Sea-level pressure: 30.48 ins. Hg: falling steadily
Visibility: 80 miles
6-hr Max temp: 52F
6-hr Min temp: 30F
6-hr Precip: 0.00 ins.
6-hr Snow: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 CLR 80 326/51/35/1809G15/048/ FEW CU ALQDS/ 8/100
58012 10052 20030

SUMMARY FOR TUESDAY, NOVEMBER 3, 2020

TEMPERATURE (DEGREES F)
MAX…….43   NORMAL…..54
MIN…….29   NORMAL…..37
MEAN……36   NORMAL…..46

DEPARTURE FROM 30-YEAR NORMAL………………-10
TOTAL DEPARTURE FOR THE MONTH………………-23 [-7.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………….. 29  DEPARTURE…..+10
TOTAL HEATING UNITS FOR THE MONTH…………….. 80  DEPARTURE…..+23
TOTAL HEATING UNITS FOR THE SEASON…………….532  DEPARTURE…..-88
TOTAL HEATING UNITS LAST SEASON TO DATE………..499  DEPARTURE…..+33

PEAK WIND GUST FOR YESTERDAY (MPH)
420C/Official……………………..48 WNW  AT  9:57 A.M.
AEROVANE (south tower)……………..53 WNW  AT  9:22 A.M.
ASOS……………………………..47 WNW  AT  9:56 A.M.
DAVIS #1………………………….49 WNW  AT  9:49 A.M.
DAVIS #2 (south tower)……………..45 WNW   AT  9:56 A.M.
VECTOR……………………………5
RMY………………………………48
MERLIN……………………………48

FASTEST MILE FOR YESTERDAY……………..31 WNW  AT 9:58 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE…………..30 WNW  AT 9:57 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……….33 WNW  AT 9:57 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……….36 NW   AT 9:57 A.M.
AVERAGE WIND SPEED AND DIRECTION………..14.4 NNW [345 total miles] ASOS…………..13.1
DAVIS #1……….14.5 WNW   [294 deg.] DAVIS #2……….14.8 WNW   [294 deg.]

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….+0.22
ASOS…………0.71
TOTAL PRECIPITATION FOR THE YEAR…………41.86     DEPARTURE….-2.38
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….-0.1
TOTAL SNOWFALL FOR THE SEASON……………. 6.5    DEPARTURE….+6.1

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/…/..               48 WNW  AERO 53 WNW  RMY 48

11/04 The low since midnight is 30F, the daily normal low is 37F

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

RECORDS FOR NOVEMBER 4
HIGH 77 IN 1987
LOW 22 IN 1891
PRECIP 3.27 INCHES IN 1910
SNOWFALL 6.4 IN 1945
PEAK GUST 73 WNW IN 1965

RECORDS FOR NOVEMBER 5
HIGH 76 IN 1994
LOW 18 IN 1908
PRECIP 4.26 INCHES IN 1955
SNOWFALL 1.5 IN 1892
PEAK GUST 69 W IN 2004

TODAY’S REPORT PREPARED BY: Benjamin Turner