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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, AUGUST 31, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

BEAUTIFUL DRY DAY WITH GREAT VISIBILITY AND SEASONABLE
TEMPERATURES....

Today has been a beautiful day with low humidity, making
visibility excellent and distant mountains look very 
stark. Our high so far today is 78F, which is only 1
degree above our normal high of 77F. Our low since
midnight so far was 61F, which is just above our normal
low of 60F. Besides scattered passing clouds, we experienced
sunny conditions making for a great end of summer day. 
This morning, inversion was experienced where temperatures
below the summit were lower than at the top of the hill, 
causing looming, making for even more excellent visibility.


Today's Observations:

7 A.M.
Weather: Few cumulus in all directions, scattered cirrus
Temperature: 65F; Dew Point: 54F; Wind: WNW at 6 kts
Sea-level pressure: 30.18 ins. Hg, rising unsteadily
Visibility: 90 miles, looming along horizon below 
inversion in all directions
6-hr Max temp: 68F
6-hr Min temp: 61F
24-hr Precip: 0.00 ins.
BHO SA 1155 250 SCT 90 220/65/54/2906/018/ FEW CU ALQDS 
LOOMING ALG HRZN BLO INVSN ALQDS/ 8/104 52019 10068 20061

10 A.M.
Weather: Scattered cumulus, scattered cirrostratus
Temperature: 74F; Dew Point: 50F; Wind: W at 7G14 kts  
Sea-level pressure: 30.19 ins. Hg, rising then more slowly
Visibility: 90 miles, looming along horizon below 
inversion in all directions
3-hr Precip: 0.00 ins.
BHO SA 1455 50 SCT 250 SCT 90 225/74/50/2707G14/019/ 
LOOMING ALG HRZN BLO INVSN ALQDS/ 8/108 51005

1 P.M.
Weather: Scattered cumulus, scattered cirrostratus
Temperature: 78F; Dew Point: 50F; Wind: WNW at 8 kts
Sea-level pressure: 30.19 ins. Hg, falling then more quickly
Visibility: 80 miles
6-hr Max temp: 78F
6-hr Min temp: 65F
6-hr Precip: 0.00 ins.
BHO SA 1755 40 SCT 250 SCT 80 222/78/50/2908/019/ 8/108 
58003 10078 20065 

SUMMARY FOR FRIDAY, AUGUST 30, 2019 

TEMPERATURE (DEGREES F)
MAX.....83   NORMAL.....77
MIN.....59   NORMAL.....60
MEAN....72   NORMAL.....68

DEPARTURE FROM 30-YEAR NORMAL......................+4
TOTAL DEPARTURE FOR THE MONTH.....................+27 [+0.7 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............4   DEPARTURE.........+4
TOTAL COOLING UNITS FOR THE MONTH.............203   DEPARTURE........+21
TOTAL COOLING UNITS FOR THE SEASON............614   DEPARTURE........+81
TOTAL COOLING UNITS LAST SEASON TO DATE.......752   DEPARTURE.......-138

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................30 SW  AT 10:52 A.M.
                   AERO.........................30 SW  AT 10:45 A.M.
                   ASOS.........................29 SW  AT  1:49 P.M.
                   DAVIS........................29 SW  AT  1:48 P.M. RMY 28
FASTEST MILE FOR YESTERDAY......................22 SW  AT 10:50 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...................22 SSW AT 10:52 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................22 SW  AT 10:50 A.M.
AVERAGE WIND SPEED AND DIRECTION..............12.3 SW
                   ASOS.......................12.0
                   DAVIS......................12.4 WSW [243 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..........1.83  DEPARTURE......-2.10
                         ASOS..............1.76
TOTAL PRECIPITATION FOR THE YEAR..........37.15  DEPARTURE......+2.23
                         ASOS.............37.04


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

8/01  84/66/75/+3/0.00/755/87               18 NNW AERO 20 NW  RMY 17
8/02  83/61/72/0/0.00/804/93                18 WSW AERO 18 WSW RMY 18 
8/03  84/66/75/+3/0.00/302/35               25 SW  AERO 26 SW  RMY 25
8/04  83/66/75/+3/0.00/732/85               21 NE  AERO 23 SW  RMY 25
8/05  81/58/70/-2/0.00/842/98               20 S   AERO 18 S   RMY 19
8/06  79/63/71/-1/0.00/282/33               15 S   AERO 14 S   RMY 17
8/07  82/66/74/+2/..../367/43               32 SSW AERO 35 SSW RMY 35
8/08  84/67/76/+4/..../588/69               30 SW  AERO 24 WNW RMY 29
8/09  82/63/73/+1/..../815/96               28 NW  AERO 25 NW  RMY 26
8/10  78/59/69/-2/..../720/85               32 NW  AERO 28 NW  RMY 28
8/11  78/55/67/-4/0.00/734/87               28 W   AERO 25 W   RMY 28
8/12  82/60/71/0/0.00/749/89                25 W   AERO 23 W   RMY 26
8/13  77/66/72/+1/0.02/059/07               25 W   AERO 24 WSW RMY 24
8/14  75/62/69/-2/..../452/54               24 ENE AERO 22 ENE RMY 22
8/15  77/59/68/-3/..../568/68               17 ESE AERO 15 SSE RMY 16
8/16  78/61/70/-1/..../732/88               20 E   AERO 17 ESE RMY 18
8/17  78/67/73/+2/..../099/12               14 SE  AERO 15 SE  RMY 15
8/18  88/70/79/+8/..../529/64               18 SSW AERO 18 SSW RMY 21
8/19  92/69/81/+11/..../.../..              25 WSW AERO 23 WSW RMY 25
8/20  87/66/77/+7/..../.../..               18 W   AERO 14 WSW RMY N/A
8/21  85/68/77/+7/0.12/.../..               33 SW  AERO 32 SW  RMY 33
8/22  88/68/78/+8/0.00/.../..               25 W   AERO 21 W   RMY 26
8/23  78/60/69/-1/0.04/.../..               23 N   AERO 18 N   RMY 24
8/24  72/55/64/-6/0.00/.../..               25 ENE AERO 21 ENE RMY 22
8/25  66/56/61/-8/0.00/.../..               31 ENE AERO 25 ENE RMY 29
8/26  71/51/61/-8/0.00/.../..               25 NE  AERO 21 NE  RMY 25
8/27  77/54/66/-3/0.00/.../..               18 SSW AERO 18 SSW RMY 17
8/28  78/59/69/0/..../.../..                21 SSE AERO 18 SSE RMY 20
8/29  83/63/73/+4/..../.../..               25 WNW AERO 21 WNW RMY 26
8/30  84/59/72/+4/..../.../..               30 SW  AERO 30 SW  RMY 28

8/31 Low temp since midnight is 61F; normal low is 60F


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

RECORDS FOR AUGUST 31
HIGH 94F IN 1953
LOW 42F IN 1976
PRECIP 2.46 INCHES IN 1954
PEAK GUST 125 MPH SE IN 1954 [CAROL - RECORD FOR MONTH]

RECORDS FOR SEPTEMBER 1
HIGH 93F IN 1969, 2010
LOW 47F IN 1975, 2017
PRECIP 2.32 INCHES IN 2013
PEAK GUST 59e MPH S IN 1945, SSW IN 1965

TODAY'S REPORT PREPARED BY: Samantha Richard