Saturday, August 15, 2020

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

SATURDAY, AUGUST 15, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

OVERCAST AND COOL WITH TRACE AMOUNTS OF
RAINFALL….

Today was overcast, with some very light drizzle
falling between 5-10 A.M. Visibility was limited
to only 10 mph thanks to a distant fog. Wind is
more significant than previous days, reaching over
30 mph this morning. The breeze off the ocean is
coming in at around 18 mph, keeping temperatures
much cooler than seasonal averages.

The high so far today is 66F, 14 degrees below the
daily normal maximum of 80F. The low since midnight
is 63F, a degree above the normal minimum of 62F.

The summit of Blue Hill is reaching a drought, with
the monthly rain total being 1.74 inches below
normal. Supporting evidence is the annual rain
deficit of -3.66 inches.

Today’s Observations:

7 A.M.
Weather: Overcast stratus, very light drizzle
Temperature: 65F; Dew Point: 61F; Relative Humidity: 87%
Wind: NNE at 13G25 kts, peak of 33 NE at 6:52 A.M.
Sea-level pressure: 30.05 ins. Hg: Falling then rising
Visibility: 5 miles, fog
6-hr Max temp: 66F
6-hr Min temp: 63F
24-hr Precip: Trace
BHO SA 1155 10 OVC 5F 177/65/61/0413G25/005/ L-CTD PCPN
VRY LGT PK WND 0429/52/ 8/6// 51018 10066 20063

10 A.M.
Weather: Overcast stratus
Temperature: 66F; Dew Point: 62F; Relative Humidity: 90%
Wind: NNE at 12G24 kts
Sea-level pressure: 30.09 ins. Hg: Rising steadily
Visibility: 5 miles, fog
3-hr Precip: Trace
BHO SA 1455 20 OVC 5F 192/66/62/0312G24/009/ 8/6// 600//
51015

1 P.M.
Weather: Overcast stratus
Temperature: 65F; Dew Point: 61F; Relative Humidity: 86%
Wind: NNE at 13G23 kts
Sea-level pressure: 30.10 ins. Hg: rising, then steady
Visibility: 10 miles, thin fog
6-hr Max temp: 66F
6-hr Min temp: 64F
6-hr Precip: Trace
BHO SA 1755 20 OVC 10 194/65/61/0313G23/010/ THN FG ALQDS/
8/6// 600// 51002 10066 20064

SUMMARY FOR FRIDAY, AUGUST 14, 2020

TEMPERATURE (DEGREES F)
MAX…..82   NORMAL…..80
MIN…..67   NORMAL…..62
MEAN….75   NORMAL…..71

DEPARTURE FROM 30-YEAR NORMAL……………..+4
TOTAL DEPARTURE FOR THE MONTH……………..+92 [+6.4 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………..10  DEPARTURE…….+4
TOTAL COOLING UNITS FOR THE MONTH…………….185  DEPARTURE……+88
TOTAL COOLING UNITS FOR THE SEASON……………672  DEPARTURE…..+224
TOTAL COOLING UNITS LAST SEASON TO DATE……….510  DEPARTURE…..+162

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..23 ENE AT  6:19 P.M.
AERO…………………….22 NE  AT  8:27 A.M.
ASOS…………………….23 ENE AT  6:20 P.M.
DAVIS……………………23 E   AT  6:20 P.M
RMY N/A  MERLIN N/A
FASTEST MILE FOR YESTERDAY………………….15 NE  AT  8:40 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….16 E   AT  6:16 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………17 ENE AT  8:36 A.M.
AVERAGE WIND SPEED AND DIRECTION…………….10.0 NE
ASOS…………………….10.3
DAVIS……………………10.6 NE [53 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.13
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.23  DEPARTURE……-1.74
ASOS…………..0.23
TOTAL PRECIPITATION FOR THE YEAR……….29.30  DEPARTURE……-3.66
ASOS………….30.04

PRELIMINARY CLIMATE SUMMARY FOR JULY 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

07/01  76/63/70/0/0.01/228/25              16 E    AERO 14 E    RMY 14  TSTM
07/02  86/61/74/+4/0.00/803/88            30 WSW  AERO 25 WSW  RMY 33
07/03  73/60/67/-4/0.00/091/10             30 NE   AERO 28 NE   RMY 30
07/04  79/60/70/-1/0.00/565/62             16 S    AERO 16 S    RMY 16
07/05  83/63/73/+2/0.54/373/41             24 NW   AERO 30 NW   RMY 26  TSTM
07/06  73/60/67/-4/0.00/482/53             20 ENE  AERO 16 NNE  RMY 18
07/07  78/60/69/-2/0.00/454/50             25 S    AERO 25 S    RMY 26
07/08  83/64/74/+2/0.00/227/25             32 SSW  AERO 32 SSW  RMY 32
07/09  89/70/80/+8/0.00/834/92             24 S    AERO 23 S    RMY 22
07/10  83/70/77/+5/0.05/109/12             30 SSE  AERO 32 SSE  RMY N/A
07/11  85/70/78/+6/0.00/614/68             39 S    AERO 39 S    RMY 38
07/12  86/70/78/+6/0.00/830/92             28 WSW  AERO 28 WSW  RMY 29
07/13  82/69/76/+4/0.23/306/34             30 SSE  AERO 31 SSE  RMY 30  TSTM
07/14  78/63/71/-1/0.00/369/41             26 ENE  AERO 25 ENE  RMY 26
07/15  72/59/66/-6/0.00/539/60             21 NE   AERO 21 NE   RMY N/A
07/16  73/57/65/-7/0.00/815/91             21 E    AERO 21 E    RMY 19
07/17  71/57/64/-8/0.19/027/03             24 SSW  AERO 24 SSW  RMY 25
07/18  89/66/78/+6/0.00/822/92             18 W    AERO 17 W    RMY 19
07/19  92/69/81/+9/0.00/722/81             28 S    AERO 28 S    RMY 26
07/20  91/72/82/+10/T/481/54               25 SSW  AERO 25 SSW  RMY N/A
07/21  88/68/78/+6/0.00/799/90             25 W    AERO 25 W    RMY 24
07/22  80/67/74/+2/0.17/275/31             16 ENE  AERO M  M    RMY 16
07/23  88/68/78/+6/0.48/203/23             31 N    AERO 32 N    RMY 31  TSTM
07/24  81/68/75/+3/0.00/476/54             15 ENE  AERO 15 ENE  RMY 16
07/25  88/67/78/+6/0.00/845/96             18 W    AERO 18 WNW  RMY N/A
07/26  89/70/80/+8/0.00/632/72             27 W    AERO 28 W    RMY 27
07/27  94/72/83/+11/0.00/823/94            23 SW   AERO 25 SW   RMY N/A
07/28  95/74/85/+13/0.01/621/71            28 WSW  AERO 25 WSW  RMY 25
07/29  90/68/79/+7/0.00/698/80             23 SSW  AERO 25 SSW  RMY 24
07/30  88/71/80/+8/0.00/252/29             29 W    AERO 28 W    RMY 29
07/31  84/69/77/+5/0.00/564/65             14 ENE  AERO 14 ENE  RMY 15

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/…/..             18 S    AERO 21 S    RMY 19
08/02  85/69/77/+5/0.02/…/..             36 S    AERO 37 S    RMY 38
08/03  91/75/83/+11/0.00/…/..            36 WSW  AERO 38 SW   RMY 36
08/04  83/71/77/5/0.21/…/..              67 SSE  AERO 71 S    RMY 70
08/05  90/68/79/+7/0.00/…/..             28 SW   AERO 30 SW   RMY 29
08/06  84/65/75/3/0.00/…/..   20 W    AERO 17 W    RMY 19
08/07  79/65/72/0/T/…/..                 16 NE   AERO 16 NE   RMY N/A
08/08  83/64/74/+2/0.00/…/..             20 S    AERO 20 S    RMY 19
08/09  90/65/78/+6/0.00/…/..             26 SSW  AERO 26 SSW  RMY 26
08/10  94/69/82/+11/0.00/…/..            22 W    AERO 20 W    RMY 20
08/11  92/72/82/+11/0.00/…/..            31 SSW  AERO 35 SSW  RMY 31  TSTM
08/12  93/74/84/+13/0.00/…/..            22 SSW  AERO 22 SW   RMY 19
08/13  88/71/80/+9/0.00/…/..             18 ENE  AERO 18 NE   RMY 18
08/14  82/67/75/+4/0.00/…/..             23 ENE  AERO 23 ENE RMY N/A

08/15  The low since midnight is 63F, the daily normal low is 62F

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

RECORDS FOR AUGUST 15
HIGH 95F IN 1928
LOW 47F IN 1964
PRECIP 1.89 INCHES IN 2011
PEAK GUST 44e MPH S IN 1941

RECORDS FOR AUGUST 16
HIGH 95F IN 1944
LOW 50F IN 1927
PRECIP 1.47 INCHES IN 1926
PEAK GUST 45e MPH N IN 1951

TODAY’S REPORT PREPARED BY: Benjamin Turner