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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, AUGUST 6, 2017  
ALL TIMES ARE IN EASTERN STANDARD TIME

PARTLY SUNNY SKIES AND CLEAR DAY ATOP GREAT BLUE HILL

High pressure south of the region has helped to make
today a very pleasant summer day.  Skies have remained
partly sunny with scattered cirrus and few cumulus
during each observation.  Visibility measured 70 miles
all day due to the low humidity and clear conditions.
Temperatures in the 60s and gusty winds made the morning
feel slightly chilly, but the afternoon was much more
seasonable as temperatures warmed into the 70s.  Winds
were out of the west and west-northwest for much of the
day.  A peak gust of 30 MPH NW occurred at 8:40AM.


PRELIMINARY STATS FOR JULY 2017

TEMPERATURE, Deg. F
Avg. Max. 79.8 [-1.0]
Avg. Min. 62.3 [-0.6]
Mean      71.1 [-0.8]
24-hour corrected mean: 70.2
Max. for month: 90F on  19th, 20th, and 21st
Min. for month: 54F on  24th and 25th

HEATING DEGREE DAYS
Total heating units: 24 [+15]
Total for the season: 24 [+15]
Total for last season: 10

COOLING DEGREE DAYS
Total cooling units: 220 [-2]
Total for the season: 421 [+70]
Total for last season: 474

PRECIPITATION, Inches
Total: 3.39 [-0.63]
Greatest in 24 hrs: 1.76 in on 24th-25th

WIND, mph
Avg. uncorrected wind speed: 9.4
Avg. corrected wind speed: 10.0
Prevailing wind direction: W at 13%
Peak gust and direction: 38 NE on 24th  

SUNSHINE:
Campbell-Stokes card minutes: 15,564 minutes of possible 26,268 or 58%
Astronomical total minutes: 16,175 minutes of possible 27,735 or 58%


Today's Observations:

7 A.M.
Weather: Few distant cumulus WNW-N, scattered cirrus
Temperature: 61F; Dew Point: 53F; Wind: W at 10G14 kts
Sea-level pressure: 29.98 ins. Hg, rising, then more slowly
Visibility: 70 miles
6-hr Max temp: 61F
6-hr Min temp: 57F
24-hr precip: 0.10 in.
BHO SA 1155 250 SCT 70 152/61/53/2810G14/998/ FEW CU DSNT WNW-N/
8/101 51026 MANUAL 70010 ASOS 70009 10061 20057

10 A.M.
Weather: Few distant cumulus WSW-E, scattered cirrus
Temperature: 69F; Dew Point: 49F; Wind: WNW at 14G25 kts
Sea-level pressure: 30.00 ins. Hg, rising, then more quickly
Visibility: 70 miles
BHO SA 1455 250 SCT 70 160/69/49/2914G25/000/ FEW CU DSNT WSW-E/
8/101 53008

1 P.M. 
Weather: Few cumulus SSE-NW, few altocumulus E and SSW, scattered 
cirrus
Temperature: 74F; Dew Point: 50; Wind: WNW at 10G16 kts
Sea-level pressure: 30.01 ins. Hg, rising then falling
Visibility: 70 miles
6-hr Max temp: 75F 
6-hr Min temp: 60F
BHO SA 1755 250 SCT 70 162/74/50/2910G16/001/ FEW CU SSE-NW
FEW AC E AND SSW/ 8/131 51002 10075 20060


SUMMARY FOR SATURDAY, AUGUST 5, 2017
 
TEMPERATURE (DEGREES F)
MAX.....75   NORMAL.....81
MIN.....63   NORMAL.....63
MEAN....69   NORMAL.....72

DEPARTURE FROM 30-YEAR NORMAL.........................-3
TOTAL DEPARTURE FOR THE MONTH........................+10 [+1.8 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............4   DEPARTURE..........-3
TOTAL COOLING UNITS FOR THE MONTH..............45   DEPARTURE..........+9
TOTAL COOLING UNITS FOR THE SEASON............466   DEPARTURE.........+79
TOTAL COOLING UNITS LAST SEASON TO DATE.......505   DEPARTURE.........-39

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................23 NW  AT 9:44 P.M.
                   AERO........................28 NW  AT 9:44 P.M.
                   ASOS........................26 WNW AT 9:43 P.M.
                   DAVIS.......................26 SSW AT 5:15 P.M. RMY 29
FASTEST MILE FOR YESTERDAY.....................18 WNW AT 9:43 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE..................18 S   AT 3:37 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE.................17 WNW AT 9:45 P.M.
AVERAGE WIND SPEED AND DIRECTION.............11.4 S
                   ASOS......................10.8
                   DAVIS......................9.6 S [181 DEG.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.10  DEPARTURE......-0.05
                         ASOS..............0.09
TOTAL PRECIPITATION FOR THE MONTH..........1.19  DEPARTURE......+0.44
                         ASOS..............1.19
TOTAL PRECIPITATION FOR THE YEAR..........35.95  DEPARTURE......+4.21
                         ASOS...............N/A ***
*** ASOS annual total not available due to erroneous readings


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

7/1  85/67/76/+6/T/439/48                  35 S   AERO 37 S   RMY 38
7/2  87/69/78/+8/T/785/86                  25 W*  AERO 28 W*  RMY 27
7/3  85/67/76/+5/0.00/894/98               28 W*  AERO 29 W   RMY 30
7/4  84/62/73/+2/0.00/783/86               17 W   AERO 17 W   RMY 18
7/5  82/62/72/+1/0.00/855/94               20 S   AERO 20 ENE RMY 20
7/6  82/60/71/+0/0.00/664/73               21 SSW AERO 22 SSW RMY 21
7/7  71/60/66/-5/0.63/000/00               28 ENE AERO 28 ENE RMY 27
7/8  84/61/73/+1/0.15/463/51               30 SW* AERO 32 SSW RMY 33  TSTM
7/9  81/60/71/-1/0.00/897/99               26 W   AERO 26 W   RMY 26
7/10 85/63/74/+2/T/751/83                  25 SW  AERO 25 S   RMY 26
7/11 82/66/74/+2/0.25/253/28               24 S   AERO 24 S   RMY N/A
7/12 85/68/77/+5/0.43/325/36               23 NE  AERO 22 NE  RMY 23  TSTM
7/13 68/55/62/-10/0.03/000/00              28 NNE AERO 28 NE  RMY 29
7/14 63/56/60/-12/0.02/000/00              15 E   AERO 14 E   RMY 14
7/15 80/60/70/-2/0.00/296/33               18 S   AERO 16 S   RMY 18
7/16 87/64/76/+4/0.00/852/95               18 SSE AERO 16 E   RMY 17
7/17 84/68/76/+4/0.00/680/76               25 S   AERO 25 S*  RMY 25
7/18 85/68/77/+5/0.07/500/56               23 S   AERO 23 S   RMY 23
7/19 90/70/80/+8/0.00/794/89               22 SW  AERO 22 SW* RMY 22
7/20 90/70/80/+8/0.00/623/70               21 WSW AERO 22 WSW RMY 21
7/21 90/68/79/+7/0.00/844/95               26 W   AERO 26 W   RMY 27
7/22 87/70/79/+7/T/266/30                  20 WNW AERO 20 WNW RMY N/A
7/23 72/61/67/-5/T/681/77                  33 NE  AERO 32 NE  RMY 33
7/24 62/54/58/-14/1.74/000/00              38 NE  AERO 37 ENE RMY 38
7/25 63/54/59/-13/0.03/203/23              23 NNE AERO 21 NNE RMY N/A
7/26 79/55/67/-5/0.00/703/80               21 S*  AERO 22 SSE RMY N/A
7/27 72/59/66/-6/0.04/044/05               21 SSW AERO 23 SW  RMY 22 
7/28 82/64/73/+1/0.00/674/77               16 W   AERO 17 N   RMY N/A
7/29 67/56/62/-10/0.00/166/19              30 NNE AERO 32 NNE RMY 33
7/30 76/55/66/-6/0.00/871/100              18 SSW*AERO 18 SSW RMY 19
7/31 85/60/73/+1/0.00/869/100              18 SSW AERO 20 SSW RMY 20


DAILY RECORDS FOR JULY

7/24/17: DAILY RECORD LOW MAXIMUM TEMPERATURE OF 62F,
         TIES PREVIOUS RECORD SET IN 1904 AND TIED IN 1964


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

8/1  87/65/76/+4/0.00/.../..               16 ESE*AERO 16 NNW RMY 16
8/2  86/65/76/+4/1.09/.../..               32 W   AERO 36 W   RMY 34 TSTM
8/3  83/65/74/+2/0.00/.../..               22 S   AERO 23 S   RMY 24
8/4  84/66/75/+3/0.00/.../..               26 S   AERO 30 S   RMY 29
8/5  75/63/69/-3/0.10/.../..               23 NW  AERO 28 NW  RMY 29

8/6  Low temp since midnight is 57F; normal low is now 63F


DAILY RECORDS FOR AUGUST

None so far.


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

RECORDS FOR AUGUST 6
HIGH 95F IN 1931
LOW 48F IN 1934
PRECIP 1.47 INCHES IN 1995
PEAK GUST 44e MPH SSW IN 1940

RECORDS FOR AUGUST 7
HIGH 95F IN 1924
LOW 51F IN 2004
PRECIP 3.32 INCHES IN 1926
PEAK GUST 51 MPH NE 1975

TODAY'S REPORT PREPARED BY: Cecilia Borries-Strigle