Thursday, October 22, 2020

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

THURSDAY, OCTOBER 22, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

PARTLY CLOUDY AFTER ANOTHER FOGGY MORNING
WITH HAZY CONDITIONS FOR THE REST OF THE DAY….

We observed foggy conditions this morning, and
then haze after the sun broke through. In the fog
we were at 2 miles of visibility, only increasing to
35 miles later on due to haze. Wind is northeasterly,
only hitting 14 mph since 7 A.M. Skies are currently
partly cloudy, yet the sun is being blocked out
a little early thanks to some clouds to the west.

What is left to mention is this day is definitely on
the warmer side. The high so far today is 70F, 12
degrees above the daily normal minimum of 58F. The low
since midnight is 60F, 19 degrees above the normal low
of 41F. These temperatures are normal for early to
mid-September.

Today’s Observations:

7 A.M.
Weather: Fog and overcast stratus
Temperature: 61F; Dew Point: 61F; Relative Humidity: 100%
Wind: W at 8 kts
Sea-level pressure: 30.27 ins. Hg: rising, then more slowly
Visibility: 2 miles, fog
6-hr Max temp: 64F
6-hr Min temp: 60F
24-hr Precip: 0.02 ins.
BHO SA 1155 15 OVC 2F 249/61/61/2808/027/ 8/6// 70002 53014
10064 20060

10 A.M.
Weather: Scattered cumulus
Temperature: 69F; Dew Point: 59F; Relative Humidity: 71%
Wind: NNE at 4 kts, light and variable
Sea-level pressure: 30.28 ins. Hg: falling then rising
Visibility: 35 miles, hazy
3-hr Precip: 0.00 ins.
BHO SA 1455 30 SCT 35 252/69/59/0104/028/ HAZY WND L/V/
8/100 50003

1 P.M.
Weather: Scattered cumulus, altocumulus, and cirrostratus
Temperature: 70F; Dew Point: 60F; Relative Humidity: 71%
Wind: ENE at 7 kts
Sea-level pressure: 30.25 ins. Hg: falling steadily
Visibility: 35 miles, haze
6-hr Max temp: 70F
6-hr Min temp: 61F
6-hr Precip: 0.00 inches
BHO SA 1755 30 SCT 120 SCT 250 SCT 35 242/70/60/0607/025/
HAZY/ 8/178 58010 10070 20061

SUMMARY FOR WEDNESDAY, OCTOBER 21, 2020

TEMPERATURE (DEGREES F)
MAX…..71   NORMAL…..59
MIN…..56   NORMAL…..41
MEAN….64   NORMAL…..50

DEPARTURE FROM 30-YEAR NORMAL…………….+14
TOTAL DEPARTURE FOR THE MONTH…………….+68 [+3.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………. 1  DEPARTURE….. -8
TOTAL HEATING UNITS FOR THE MONTH…………178  DEPARTURE…..-73
TOTAL HEATING UNITS FOR THE SEASON………..276  DEPARTURE….-117
TOTAL HEATING UNITS LAST SEASON TO DATE……334  DEPARTURE…..-58

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………. 0  DEPARTURE…… 0
TOTAL COOLING UNITS FOR THE MONTH…………. 1  DEPARTURE….. -4
TOTAL COOLING UNITS FOR THE SEASON………..831  DEPARTURE….+229
TOTAL COOLING UNITS LAST SEASON TO DATE……682  DEPARTURE….+149

PEAK WIND GUST FOR YESTERDAY (MPH)
420C/Official……………26 SSW AT   7:14 P.M.
AEROVANE (south tower)……26 SSW AT   7:46 P.M.
ASOS……………………27 SSW AT   6:52 P.M.
DAVIS #1………………..26 N   AT   7:15 P.M.
DAVIS #2 (south tower)……26 N   AT   7:15 P.M.
RMY…………………….26
MERLIN………………….27
FASTEST MILE FOR YESTERDAY…………………20 SSW AT   7:36 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………20 SSW AT   9:29 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE…………..19 SW  AT   7:48 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE…………..21 SSW AT   9:28 P.M.
AVERAGE WIND SPEED AND DIRECTION………….9.1 ENE  [218 total miles] ASOS………………….9.7
DAVIS #1………………9.3 S    [184 deg.] DAVIS #2………………9.9 S    [179 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.02  DEPARTURE….-0.13
ASOS…………..0.02
TOTAL PRECIPITATION FOR THE MONTH……….4.20  DEPARTURE….+1.07
ASOS…………..4.18
TOTAL PRECIPITATION FOR THE YEAR……….38.62  DEPARTURE….-3.59
ASOS………….39.39

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/…/..             28 SW   AERO 28 SW   RMY N/A
10/02  63/49/56/-1/0.02/…/..             20 NW   AERO 21 NW   RMY 20
10/03  65/45/55/-1/0.00/…/..             19 WNW  AERO 19 WNW  RMY 19
10/04  65/45/55/-1/0.00/…/..             17 ESE  AERO 18 ESE  RMY 18
10/05  62/52/57/+1/0.00/…/..             17 ENE  AERO 17 ENE  RMY N/A
10/06  69/51/60/+5/0.00/…/..             28 S    AERO 28 S    RMY 29
10/07  73/50/62/+7/0.14/…/..             76 W    AERO 74 W    RMY 70  TSTM
10/08  61/42/52/-2/0.00/…/..             41 W    AERO 41 W    RMY N/A
10/09  60/37/49/-5/0.00/…/..             25 SSW  AERO 28 SSW  RMY N/A
10/10  75/52/64/+10/0.00/…/..            40 SSW  AERO 40 SSW  RMY 38
10/11  64/47/56/+3/0.00/…/..             32 NNW  AERO 35 NNW  RMY N/A
10/12  52/48/50/-3/T/…/..                28 E    AERO 27 E    RMY N/A
10/13  57/49/53/0/1.74/…/..              32 E    AERO 33 E    RMY N/A
10/14  67/47/57/+5/0.00/…/..             23 WNW  AERO 25 WNW  RMY N/A
10/15  71/50/61/+9/0.00/…/..             43 S    AERO 46 S    RMY 42
10/16  68/48/58/+7/…./…/..             28 S    AERO 30 S    RMY N/A
10/17  56/39/48/-3/…./…/..             35 WNW  AERO 40 WNW  RMY 37
10/18  60/46/53/+2/0.00/…/..             20 ESE  AERO 21 ESE  RMY 20
10/19  61/46/54/+4/0.00/…/..             16 ESE  AERO 16 SSE  RMY N/A
10/20  66/49/58/+8/0.00/…/..             22 S    AERO 22 S    RMY 22
10/21  71/56/64/+14/0.06/…/..            26 SSW  AERO 26 SSW  RMY 26

10/22 The low since midnight is 60F, the daily normal low is 41F

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

RECORDS FOR OCTOBER 22
HIGH 85F IN 1979
LOW 22F IN 1940
PRECIP 2.38 INCHES IN 2014
SNOWFALL TRACE IN 1969, 2010
PEAK GUST 67 MPH ESE IN 1988

RECORDS FOR OCTOBER 23
HIGH 82F IN 1947
LOW 24F IN 1969
PRECIP 3.66 INCHES IN 2014
SNOWFALL 3.0 INCHES IN 1891
PEAK GUST 78e MPH NW IN 1941

TODAY’S REPORT PREPARED BY: Benjamin Turner