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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, AUGUST 5, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

A COOL DAY OVERALL WITH ABUNDANT SUNSHINE
AND CALM WIND IN THE MORNING HOURS....

We observed a great visibility of 80 miles, 
with almost no wind in the morning. Wind following
noontime has been 6 mph at most from the northwest.
Today has remained dry, and cooler than seasonal 
averages. The high so far today is 78F, 3 degrees 
below the daily normal maximum of 81F. The low 
since midnight is 58F, 5 degrees below the normal 
low of 63F.


PRELIMINARY STATS FOR JULY 2019

TEMPERATURE, Deg. F
Avg. Max. 84.6 [+3.8]
Avg. Min. 65.6 [+2.7]
Mean      75.1 [+3.2]
24-hour corrected mean: 74.5
Max. for month: 93F on the 20th, 30th
Min. for month: 58F on the 1st, 23rd

COOLING DEGREE DAYS
Total cooling units:   322 [+100]
Total for the season:  411 [+60]
Total for last season: 455

PRECIPITATION, Inches
Total: 5.46 [+1.44]
Greatest in 24 hrs: N/A 

WIND, mph
Avg. uncorrected wind speed: 8.8
Avg. corrected wind speed:   9.6
Prevailing wind direction: W at 14%
Peak gust and direction: 44 W on 17th  

SUNSHINE:
Campbell-Stokes card minutes: N/A
Astronomical total minutes:   N/A


Today's Observations:

7 A.M.
Weather: Scattered cirrus
Temperature: 65F; Dew Point: 51F; Wind: Calm
Sea-level pressure: 30.02 ins. Hg, falling then rising
Visibility: 80 miles
6-hr Max temp: 65F
6-hr Min temp: 58F
24-hr Precip: 0.00 ins.
BHO SA 1155 250 SCT 80 166/65/51/0000/002/ WND CALM/ 
8/002 51008 10065 20058

10 A.M.
Weather: Scattered cirrus
Temperature: 73F; Dew Point: 49F; Wind: Calm
Sea-level pressure: 30.03 ins. Hg, rising steadily
Visibility: 80 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 250 SCT 80 168/73/49/0000/003/ WND CALM/ 
8/002 51002 

1 P.M.
Weather: Broken cirrus
Temperature: 78F; Dew Point: 50F; Wind: WNW at 5 kts
Sea-level pressure: 30.00 ins. Hg, falling steadily
Visibility: 75 miles
6-hr Max temp: 78F
6-hr Min temp: 65F
6-hr Precip: 0.00 ins. 
BHO SA 1755 E250 BKN 75 158/78/50/2905/000/ WND LGT/ 
8/002 56010 10078 20065 

SUMMARY FOR SUNDAY, AUGUST 4, 2019 

TEMPERATURE (DEGREES F)
MAX.....83   NORMAL.....81
MIN.....66   NORMAL.....63
MEAN....75   NORMAL.....72

DEPARTURE FROM 30-YEAR NORMAL.....................+3
TOTAL DEPARTURE FOR THE MONTH.....................+9 [+2.1 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY..............10   DEPARTURE.........+3
TOTAL COOLING UNITS FOR THE MONTH..............37   DEPARTURE.........+8
TOTAL COOLING UNITS FOR THE SEASON............448   DEPARTURE........+68
TOTAL COOLING UNITS LAST SEASON TO DATE.......509   DEPARTURE........-61

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................21 NE  AT  6:05 P.M.
                   AERO.........................23 SW  AT 12:22 A.M.
                   ASOS.........................22 SW  AT 12:57 A.M.
                   DAVIS........................22 SW  AT 12:56 A.M. RMY 25
FASTEST MILE FOR YESTERDAY......................14 SW  AT 12:46 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...................16 SW  AT 12:47 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................15 SW  AT 12:47 A.M.
AVERAGE WIND SPEED AND DIRECTION...............6.9 NE
                   ASOS........................7.1
                   DAVIS.......................7.3 NW [314 deg.]


PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.15
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........0.00  DEPARTURE......-0.60
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE YEAR..........35.33  DEPARTURE......+3.74
                         ASOS.............35.28

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 83/58/71/+1/0.00/896/98               21 NNW AERO 21 NNW RMY N/A
07/02 82/65/74/+4/0.00/329/36               23 W   AERO 23 W   RMY 23
07/03 89/67/78/+7/0.00/866/95               18 S   AERO 18 S   RMY 18
07/04 88/68/78/+7/0.00/748/82               17 SSW AERO M  M   RMY 17
07/05 87/69/78/+7/0.00/829/91               21 SW  AERO M  M   RMY 21
07/06 90/71/81/+10/0.83/646/71              26 WNW AERO M  M   RMY N/A
07/07 78/64/71/0/0.00/827/91                30 NE  AERO M  M   RMY N/A
07/08 79/59/69/-3/0.00/763/84               16 N   AERO 18 SSW RMY N/A
07/09 85/61/73/+1/0.00/871/96               18 NW  AERO 16 NW  RMY 18
07/10 88/69/79/+7/0.00/607/67               20 ESE AERO 16 ESE RMY 17
07/11 81/67/74/+2/0.62/000/00               35 S   AERO 33 S   RMY 36
07/12 84/68/76/+4/0.00/316/35               31 WNW AERO 30 WNW RMY 32
07/13 85/65/75/+3/0.00/812/90               21 W   AERO 20 WSW RMY 20
07/14 87/68/78/+6/0.00/702/78               25 W   AERO 21 W   RMY 23
07/15 82/63/73/+1/0.00/791/88               24 WNW AERO 23 WNW RMY 22
07/16 86/65/76/+4/0.00/682/76               23 W   AERO 21 W   RMY 21
07/17 90/70/80/+8/1.32/.../..               44 W   AERO M  M   RMY 47 
07/18 72/61/67/-5/0.04/.../..               33 NE  AERO 36 NE  RMY 33
07/19 89/61/75/+3/0.00/.../..               24 WSW AERO 26 SW  RMY 25
07/20 93/75/84/+12/0.00/.../..              21 WSW AERO 22 WSW RMY N/A
07/21 92/76/84/+12/0.00/.../..              31 W   AERO 35 W   RMY 31
07/22 81/64/73/+1/..../.../..               35 ENE AERO 37 ENE RMY 34
07/23 66/58/62/-10/..../.../..              30 NNE AERO 33 NNE RMY 30
07/24 77/60/69/-3/0.00/.../..               14 NE  AERO 15 NE  RMY N/A
07/25 80/61/71/-1/0.00/.../..               17 SSE AERO 23 N   RMY 17
07/26 84/62/73/+1/0.00/.../..               22 SSE AERO 23 SSE RMY 20
07/27 83/64/74/+2/0.00/.../..               21 S   AERO 23 S   RMY 21
07/28 89/64/77/+5/0.00/.../..               25 WSW AERO 36 WSW RMY 26
07/29 89/71/80/+8/0.01/.../..               23 W   AERO 25 W   RMY 21
07/30 93/71/82/+10/0.00/.../..              24 S   AERO 24 S   RMY 23
07/31 90/68/79/+7/0.55/.../..               37 SW  AERO 35 SW  RMY 38

DAILY RECORDS FOR JULY 2019

7/20/19: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 75F,
BREAKS PREVIOUS RECORD OF 73F SET IN 1977, 2015

7/21/19: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 76F,
BREAKS PREVIOUS RECORD OF 75F SET IN 1991

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/.../..                18 NNW AERO 20 NW  RMY 17
8/02   83/61/72/0/0.00/.../..                18 WSW AERO 18 WSW RMY 18 
8/03   84/66/75/+3/0.00/.../..               25 SW  AERO 26 SW  RMY 25
8/04   83/66/75/+3/0.00/.../..               21 NE  AERO 23 SW  RMY 25

8/05 Low temp since midnight is 58F; normal low is 63F


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


RECORDS FOR AUGUST 4
HIGH 95F IN 1928
LOW 48F IN 1900
PRECIP 1.68 INS IN 1983
PEAK GUST 48 MPH SW IN 1974

RECORDS FOR AUGUST 5
HIGH 98F IN 1955
LOW 48F IN 1929,1972
PRECIP 3.03 INCHES IN 1893
PEAK GUST 60e MPH SW 1977

TODAY'S REPORT PREPARED BY: Benjamin Turner