Tuesday, November 3, 2020

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

TUESDAY, NOVEMBER 3, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

ONCE AGAIN WINDY AND CHILLY, BUT MORE SUNSHINE….

Today is yet another chilly day with gusty winds. The biggest
difference is there is considerably more sun today after clouds
moved out this morning.

A weak disturbance moved through this morning with clouds
and a lot of virga, but no precipitation was observed here at
the hill. The low hanging clouds and virga with brighter skies
in the backdrop made for quite the picturesque view early this
morning!

Winds were gusty ahead of this disturbance blowing out of
southwest and then west-southwest. Then the wind diminished
for about an hour this morning before shifting to west-northwest
and increasing once again. Gusts have been frequently 30-35 mph
with a peak gust of 46 mph occurring at 9:57 A.M.

The air has dried out considerably as well following the
disturbance. The dew point was around 30 early this morning,
but has dropped into the mid teens early this afternoon.

Visibility has been excellent all day, holding at around 80 miles.

The high so far today is 43F, which is 11 degrees below the
daily normal maximum of 54F. The low since midnight is 31F,
which is 6 degrees below the daily normal minimum of 37F.

Today’s Observations:

7 A.M.
Weather: Scattered stratocumulus, overcast altostratus/nimbostratus,
few breaks in overcast all quadrants, virga all quadrants
Temperature: 35F; Dew Point: 30F; Relative Humidity: 81%
Wind: W at 16G21 kts, peak wind W 30 kts at 6:32 A.M.
Sea-level pressure: 29.74 ins. Hg: rising, then more rapidly
Visibility: 80 miles
6-hr Max temp: 37F
6-hr Min temp: 32F
24-hr Precip: Trace
24-hr Snow: Trace
Snow Depth: 0 ins.
BHO SA 1155 30 SCT E75 OVC 80 072/35/30/2616G21/974/
FEW BINOVC ALQDS VIRGA ALQDS PK WND 2730/32/ 8/52/
53034 70000 10037 20032

10 A.M.
Weather: Broken stratocumulus, broken cirrostratus, virga NW-NE-E
Temperature: 41F; Dew Point: 20F; Relative Humidity: 42%
Wind: WNW at 18G31 kts, peak wind WNW 34 kts at 9:31 A.M.
Sea-level pressure: 29.85 ins. Hg: rising, then more slowly
Visibility: 80 miles
3-hr Precip: 0.00 ins.
3-hr Snow: 0.0 ins.
BHO SA 1455 E50 BKN 220 BKN 80 107/41/20/3018G31/985/
VIRGA NW-NE-E PK WND 2934/31/ 8/508 51035

1 P.M.
Weather: Scattered stratocumulus, scattered cirrostratus,
thin broken cirrus
Temperature: 40F; Dew Point: 16F; Relative Humidity: 37%
Wind: WNW at 14G20 kts, peak wind WNW 28 kts at 12:16 P.M.
Sea-level pressure: 29.96 ins. Hg: rising, then more rapidly
Visibility: 80 miles
6-hr Max temp: 43F
6-hr Min temp: 35F
6-hr Precip: 0.00 ins.
6-hr Snow: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 60 SCT 220 SCT 250 -BKN 80 147/40/16/3014G20/996/
PK WND 3028/16/ 8/508 53040 10043 20035

SUMMARY FOR MONDAY, NOVEMBER 2, 2020

TEMPERATURE (DEGREES F)
MAX…….40   NORMAL…..55
MIN……..31   NORMAL…..37
MEAN…..36   NORMAL…..46

DEPARTURE FROM 30-YEAR NORMAL………………-10
TOTAL DEPARTURE FOR THE MONTH………………-13 [-6.7 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………….. 29  DEPARTURE…..+10
TOTAL HEATING UNITS FOR THE MONTH…………….. 51  DEPARTURE…..+13
TOTAL HEATING UNITS FOR THE SEASON…………..503  DEPARTURE…..  -98
TOTAL HEATING UNITS LAST SEASON TO DATE……478  DEPARTURE…..+25

PEAK WIND GUST FOR YESTERDAY (MPH)
420C/Official…………………….61 WNW  AT  11:22 A.M.
AEROVANE (south tower)…….62 WNW  AT  11:22 A.M.
ASOS……………………………..60 WNW  AT  11:23 A.M.
DAVIS #1………………………..59 WNW  AT  11:22 A.M.
DAVIS #2 (south tower)……..56 WNW   AT  11:22 A.M.
VECTOR………………………….71
RMY………………………………62
MERLIN…………………………..61

FASTEST MILE FOR YESTERDAY……………..41 WNW  AT 11:22 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……….38 WNW  AT 11:23 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE….41 WNW  AT 11:23 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE….44 WNW  AT 11:23 A.M.
AVERAGE WIND SPEED AND DIRECTION……20.5 WNW [491 total miles] ASOS…………..18.6
DAVIS #1……..20.7 WNW   [286 deg.] DAVIS #2……..20.9 WNW   [286 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…..Trace    DEPARTURE….-0.16
ASOS…………0.00
TOTAL PRECIPITATION FOR THE MONTH…………0.69      DEPARTURE….+0.38
ASOS…………0.71
TOTAL PRECIPITATION FOR THE YEAR…………..41.86     DEPARTURE….-2.22
ASOS……….42.66

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HOURS ENDING 7 A.M……Trace     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 The low since midnight is 31F, 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 3
HIGH 75 IN 1990
LOW 21 IN 1891
PRECIP 1.92 INCHES IN 1951
SNOWFALL 0.1 IN 1951
PEAK GUST 96e SSE IN 1951

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

TODAY’S REPORT PREPARED BY: Matt Douglas