Wednesday, September 2, 2020

| September 2, 2020 | Reply

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

WEDNESDAY, SEPTEMBER 2, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

RAIN STARTS LATE MORNING, WITH FOG BEING
A SIGNIFICANT LIMITER ON VISIBILITY….

Today was overcast with a max visibility of 15 miles
due to fog. Rain began shortly before 10 A.M., with
fog becoming more prominent from that point onward.
Rain totaled 0.12 inches by 1 P.M., continuing through
the time of observation. The highest wind seen yet is
24 mph from the southeast, with an average speed closer
to 15 mph.

The high so far today is 68F, 8 degrees below the daily
normal max of 76F. The low since midnight is 59F, which is
is the normal minimum for today.

Today’s Observations:

7 A.M.
Weather: Overcast stratus
Temperature: 64F; Dew Point: 61F; Relative Humidity: 90%
Wind: SE at 9 kts
Sea-level pressure: 30.06 ins. Hg: rising then falling
Visibility: 15 miles, thin fog
6-hr Max temp: 64F
6-hr Min temp: 60F
24-hr Precip: 0.00 ins.
BHO SA 1155 E20 OVC 15 179/64/61/1309/006/ THN FG ALQDS/
8/6// 56003 10064 20060

10 A.M.
Weather: Light rain beginning 9:43 A.M., overcast
stratus
Temperature: 67F; Dew Point: 64F; Relative Humidity: 91%
Wind: SE at 7 kts
Sea-level pressure: 30.02 ins. Hg: falling steadily
Visibility: 15 miles, thin fog
3-hr Precip: Trace
BHO SA 1455 E40 OVC 15R- 165/67/64/1407/002/ R-B43 THN FG
ALQDS/ 8/6// 600// 58014

1 P.M.
Weather: Light rain, overcast stratus
Temperature: 66F; Dew Point: 66F; Relative Humidity: 100%
Wind: SSE at 10G17 kts
Sea-level pressure: 29.96 ins. Hg: falling unsteadily
Visibility: 1 mile, fog
6-hr Max temp: 68F
6-hr Min temp: 64F
6-hr Precip: 0.12 ins.
BHO SA 1755 E10 OVC 1R-F 145/66/66/1510G17/996/ R-CTD/ 8/7//
6012/ 56020 10068 20064

SUMMARY FOR TUESDAY, SEPTEMBER 1, 2020

TEMPERATURE (DEGREES F)
MAX…..76   NORMAL…..76
MIN…..59   NORMAL…..59
MEAN….68   NORMAL…..68

DEPARTURE FROM 30-YEAR NORMAL……………..  0
TOTAL DEPARTURE FOR THE MONTH……………..  0 [+/-0 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………….  3  DEPARTURE……-1
TOTAL COOLING UNITS FOR THE MONTH…………….  3  DEPARTURE……-1
TOTAL COOLING UNITS FOR THE SEASON……………760  DEPARTURE….+219
TOTAL COOLING UNITS LAST SEASON TO DATE……….622  DEPARTURE….+138

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..22 SSE AT  1:56 P.M.
AERO…………………….21 SE  AT  7:02 P.M.
ASOS…………………….20 SE  AT  5:37 P.M.
DAVIS……………………22 SSE AT  1:49 P.M.
RMY 20  MERLIN 20
FASTEST MILE FOR YESTERDAY………………….16 SE  AT  7:40 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….15 ESE AT  7:14 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………15 SE  AT  7:33 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..10.0 SE
ASOS……………………9.4
DAVIS………………….10.2 SSE [151 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.11
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.00  DEPARTURE……-0.11
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE YEAR……….32.81  DEPARTURE……-2.32
ASOS………….33.58

PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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

08/01  87/66/77/+5/0.00/866/100            18 S    AERO 21 S    RMY 19
08/02  85/69/77/+5/0.02/320/37             36 S    AERO 37 S    RMY 38
08/03  91/75/83/+11/0.00/715/83            36 WSW  AERO 38 SW   RMY 36
08/04  83/71/77/5/0.21/094/11              67 SSE  AERO 71 S    RMY 70
08/05  90/68/79/+7/0.00/668/78             28 SW   AERO 30 SW   RMY 29
08/06  84/65/75/3/0.00/701/82   20 W    AERO 17 W    RMY 19
08/07  79/65/72/0/T/136/16                 16 NE   AERO 16 NE   RMY N/A
08/08  83/64/74/+2/0.00/612/72             20 S    AERO 20 S    RMY 19
08/09  90/65/78/+6/0.00/661/78             26 SSW  AERO 26 SSW  RMY 26
08/10  94/69/82/+11/0.00/727/86            22 W    AERO 20 W    RMY 20
08/11  92/72/82/+11/0.00/708/84            31 SSW  AERO 35 SSW  RMY 31  TSTM
08/12  93/74/84/+13/0.00/647/77            22 SSW  AERO 22 SW   RMY 19
08/13  88/71/80/+9/0.00/528/63             18 ENE  AERO 18 NE   RMY 18
08/14  82/67/75/+4/0.00/618/74             23 ENE  AERO 23 ENE RMY N/A
08/15  67/62/65/-6/T/000/00                33 NNE  AERO 32 NNE  RMY N/A
08/16  69/62/66/-5/…./000/00             26 ENE  AERO 28 ENE  RMY 26
08/17  73/59/66/-5/…./339/41             25 NE   AERO 24 NE   RMY N/A
08/18  84/63/74/+3/…./…/..             23 W    AERO 23 W    RMY 24
08/19  81/59/70/0/0.03/526/64              26 W    AERO 28 W    RMY 27
08/20  80/56/68/-2/0.00/804/98             22 W    AERO 21 W    RMY 22
08/21  88/61/75/+5/0.00/719/88             28 SW   AERO 26 SW   RMY 28
08/22  85/66/76/+6/0.26/521/64             18 NNE  AERO 16 S    RMY 16
08/23  89/63/76/+6/2.21/552/68             60 WNW  AERO 53 WNW  RMY 58  TSTM HAIL
08/24  87/67/77/+7/0.00/493/61             18 S    AERO 18 S    RMY 19  TSTM
08/25  86/65/76/+7/0.01/492/61             35 NNW  AERO 37 NNW  RMY 35
08/26  74/56/65/-4/0.00/…/..             29 NW   AERO 32 NW   RMY N/A
08/27  68/57/63/-6/0.33/…/..             18 SSE  AERO 20 SSE  RMY 20  TSTM
08/28  80/59/70/+1/0.00/…/..             20 W    AERO 20 W    RMY N/A
08/29  74/65/70/+1/0.06/…/..             32 W    AERO 32 W    RMY N/A
08/30  75/57/66/-2/0.00/…/..             36 W    AERO 36 W    RMY N/A
08/31  75/54/65/-3/0.00/…/..             20 S    AERO 20 S    RMY 20

DAILY RECORDS FOR AUGUST 2020

8/23/20: DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 89F,
BREAKS PREVIOUS RECORD of 88F SET IN 1918, 1947, 1949, 1996

8/23/20: DAILY RECORD PRECIPITATION OF 2.21 INS,
BREAKS PREVIOUS RECORD OF 2.09 INS SET IN 2010

8/23/20: DAILY RECORD PEAK WIND GUST OF 60 MPH,
TIES PREVIOUS RECORD OF 60 MPH SET IN 1940

PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER 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

09/01  76/59/68/0/0.00/…/..              22 SSE  AERO 21 SE   RMY 20

09/02 The low since midnight is 59F, the daily normal low is 59F

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

RECORDS FOR SEPTEMBER 2
HIGH 99F IN 1953 (SEPTEMBER MAXIMUM RECORD)
LOW 44F IN 1909
PRECIP 2.73 INCHES IN 1947
PEAK GUST 55e MPH WNW IN 1944

RECORDS FOR SEPTEMBER 3
HIGH 95F IN 1929
LOW 43F IN 1983
PRECIP 3.82 INCHES IN 1972 (TROPICAL STORM CARRIE)
PEAK GUST 58 MPH NNE IN 1972 (TROPICAL STORM CARRIE)

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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