BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, AUGUST 8, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME

ANOTHER CLEAR, COOLER SUMMER DAY 

Very clear overnights conditions along with low winds allowed
for another very cool evening in the surrounding valleys. Here
on Great Blue Hill temperatures dipped to an overnight low
of 58F while nearby Norwood Memorial Airport (KOWD) recorded
a low of 49F.

Nearly cloudless skies have slowly begun to cloud up throughout
the morning, with cirrostratus extending from the south
and a few cumulus inland by the 1:00 PM EST observation. A maximum
of 77F had been reached.


Today's Observations:
 
7 A.M.
Weather: Clear, few cumulus distant offshore E-SE,
few cirrus distant SSE-SSW and W
Temperature: 65F; Dew Point: 56F; Wind: estimated NNE at 3 kts
Wind Speed: Light
Sea-level pressure: 30.01 ins. Hg, rising, then more slowly  
Visibility: 70 miles, light distant haze
6-hr Max temp: 65F
6-hr Min temp: 58F
24-hr precip: 0.00 
BHO SA 1155 CLR 70 161/65/56/E0203/001/ 
FEW CU DSNT OFFSHR E-SE FEW CI DSNT SSE-SSW AND W WND LGT/ 
8/101 51014 10065 20058 

10 A.M.
Weather: Clear, few cumulus E-SW, few cirrostratus distant
E-SW 
Temperature: 74F; Dew Point 55F; Wind: estimated NE at 5 kts,
Wind: Light and Variable
Sea-level pressure: 30.01 ins. Hg, rising, then falling but higher still
Visibility: 75 miles   
BHO SA 1455 CLR 75 162/74/55/E0505/001/ 
FEW CU SE-NNE FEW CI DSNT E-SW WND LGT AND VRB/ 8/105 50001  

1 P.M.
Weather: Thin broken cirrsostratus, few cumulus SE-NNE
Temperature: 76F; Dew Point: 50F; Wind: ENE at 8 kts,
Sea-level pressure: 30.01 ins. Hg, steady 
Visibility: 75 miles  
6-hr Max temp: 77F  
6-hr Min temp: 65F  
BHO SA 1755 E250 -BKN 75 162/76/50/0708/001/ 
FEW CU SE-NNE/ 8/106 50000 10077 20065 


SUMMARY FOR FRIDAY, AUGUST 7, 2015 
  
TEMPERATURE (DEGREES F)
MAX.....78   NORMAL.....81
MIN.....61   NORMAL.....63
MEAN....70   NORMAL.....72
 
DEPARTURE FROM 30-YEAR NORMAL........................-2
TOTAL DEPARTURE FOR THE MONTH.......................+17 [+2.2 DEGREES/DAY]
 
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............5   DEPARTURE..........-2
TOTAL COOLING UNITS FOR THE MONTH..............66   DEPARTURE.........+16
TOTAL COOLING UNITS FOR THE SEASON............460   DEPARTURE.........+59
TOTAL COOLING UNITS LAST SEASON TO DATE.......380   DIFFERENCE........+80
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY...................20  ESE  AT  4:43 P.M.      
                   ASOS........................19  ESE  AT  4:43 P.M. .  
                   DAVIS.......................18  ESE  AT  4:43 P.M. RMY 18
FASTEST MILE FOR YESTERDAY.....................12  E    AT  3:55 P.M.*     
MAXIMUM 2-MINUTE ASOS AVERAGE..................14  NE   AT  2:50 P.M.     
MAXIMUM 2-MINUTE DAVIS AVERAGE.................12  ENE  AT  2:49 P.M.   
AVERAGE WIND SPEED AND DIRECTION..............8.7 E 
                   ASOS.......................9.0
                   DAVIS......................7.7  ENE [057 deg.]
* Last of several occurrences...

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.00  DEPARTURE.....-0.14
                         ASOS...............0.00
TOTAL PRECIPITATION FOR THE MONTH...........0.37  DEPARTURE.....-0.67
                         ASOS...............0.38
TOTAL PRECIPITATION FOR THE YEAR...........27.73  DEPARTURE.....-4.30
                        ASOS...............N/A ***
*** ASOS annual total not available due to erroneous readings

PRELIMINARY CLIMATE SUMMARY FOR AUGUST CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/RMY 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

8/1  88/68/78/+6/0.06/.../..               28 WNW RMY N/A 
8/2  86/62/74/+2/0.00/.../..               24 SW  RMY N/A
8/3  89/68/79/+7/0.00/.../..               31 S   RMY N/A  
8/4  86/66/76/+4/0.31/.../..               45 W   RMY 50  TSTM  
8/5  84/64/74/+2/0.00/.../..               28 WNW RMY 27
8/6  80/59/70/-2/0.00/.../..               22 W   RMY 21
8/7  78/61/70/-2/0.00/.../..               20 ESE RMY 18

8/8  low since midnight is 58F; normal low is now 63F

DAILY RECORDS FOR AUGUST 2015
None so far.

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

RECORDS FOR AUGUST 8
HIGH 93F IN 1909,1949
LOW 47F IN 1903
PRECIP 3.08 INCHES IN 1976
PEAK GUST 45 MPH WNW IN 1958

RECORDS FOR AUGUST 9
HIGH 100F IN 1949
LOW 49F IN 1899
PRE 2.65 INS IN 1976
PEAK GUST 90 MPH SW IN 1968

TODAY'S REPORT PREPARED BY: Brian Fitzgerald