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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, AUGUST 10, 2017  
ALL TIMES ARE IN EASTERN STANDARD TIME

SUMMER TEMPERATURES RETURN TO GREAT BLUE HILL

Today's and yesterday's temperatures feel like summer again on top 
of Great Blue Hill. The maximum temperatures have been slightly 
above the normal of 81F with a maximum temperature yesterday of 
83F and a high of 85F as of 1:00 PM EST today. Winds have been 
mild and variable all day and distant haze remained all day limiting 
visibility to 30 miles during each observation. The morning started 
off clear, but by the 1:00 pm observation we had scattered cumulus 
clouds.

Today's Observations:

7 A.M.
Weather: Clear, few altocumulus in all directions
Temperature: 68F; Dew Point: 60F; Wind: W at 9 kts
Sea-level pressure: 30.27 ins. Hg, rising, then less quickly
Visibility: 30 miles, distant fog in all directions, thin smoke 
layer to the north moving east
6-hr Max temp: 67F
6-hr Min temp: 63F
24-hr precip: 0.00
BHO SA 1155 CLR 30 251/68/60/2609/027/ FEW AC ALQDS DSNT FG 
ALQDS SML FIRE 10 MI NNW THN K PLUME DRFTNG E/ 8/060 53008 
10067 20063 

10 A.M.
Weather: Clear, lone towering cumulus N, few distant altocumulus SSW
Temperature: 80F; Dew Point: 62F; Wind: Estimated SSW at 3 kts,
Wind: Light
Sea-level pressure: 30.26 ins. Hg, steady then falling
Visibility: 30 miles, distant haze all directions 
BHO SA 1455 CLR 30 247/80/62/E2103/026/ FEW TCU N FEW AC SSW 
DSNT HZ ALQDS WND LGT AND VRB/ 8/200 58004  

1 P.M. 
Weather: Scattered cumulus 
Temperature: 82F; Dew Point: 58F; Wind: SSW at 4 kts,
Wind speed: Light
Sea-level pressure: 30.24 ins. Hg, falling, then more quickly
Visibility: 30 miles, distant haze in all directions
6-hr Max temp: 85F 
6-hr Min temp: 68F
BHO SA 1755 40 SCT 30 241/82/58/E2104/024/ DSNT HZ ALQDS 
WND LGT AND VRB/ 8/200 57006 10085 20068

SUMMARY FOR WEDNESDAY, AUGUST 9, 2017
 
TEMPERATURE (DEGREES F)
MAX.....83   NORMAL.....80
MIN.....58   NORMAL.....63
MEAN....71   NORMAL.....72

DEPARTURE FROM 30-YEAR NORMAL.........................-1
TOTAL DEPARTURE FOR THE MONTH.........................-5 [-0.8 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............6   DEPARTURE..........-1
TOTAL COOLING UNITS FOR THE MONTH..............58   DEPARTURE..........-4
TOTAL COOLING UNITS FOR THE SEASON............479   DEPARTURE.........+64
TOTAL COOLING UNITS LAST SEASON TO DATE.......553   DEPARTURE.........-74

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................18 S   AT  7:22 P.M.
                   AERO........................18 S   AT  6:55 P.M.
                   ASOS........................19 S   AT  7:21 P.M.
                   DAVIS.......................17 SSW AT  6:49 P.M. RMY 19
FASTEST MILE FOR YESTERDAY.....................13 WSW AT  8:29 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE..................14 SSW AT  8:30 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE.................13 SSW AT  8:30 P.M.
AVERAGE WIND SPEED AND DIRECTION..............8.4 WSW
                   ASOS.......................9.0
                   DAVIS......................6.3 WSW [245 DEG.]

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..........1.22  DEPARTURE......-0.10
                         ASOS..............1.22
TOTAL PRECIPITATION FOR THE YEAR..........35.98  DEPARTURE......+3.67
                         ASOS...............N/A ***
*** ASOS annual total not available due to erroneous readings


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  76/57/67/-5/0.00/.../..               30 NW  AERO 32 NW  RMY 31
8/7  76/60/68/-4/..../.../..               28 SSW AERO 28 SSW RMY 29
8/8  74/60/67/-5/..../.../..               17 S   AERO 16 SSE RMY 16
8/9  83/58/71/-1/0.00/.../..               18 S   AERO 18 S   RMY 19 

8/9  Low temp since midnight is 63F; 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 9
HIGH 100F IN 1949
LOW 49F IN 1899
PRE 2.65 INS IN 1976
PEAK GUST 90 MPH SW IN 1968

RECORDS FOR AUGUST 10
HIGH 101F IN 1949 [STATION RECORD MAXIMUM - Tied with 8/2/1975]
LOW 49F IN 1964
PRE 2.27 INS IN 1952
PEAK GUST 88e MPH S IN 1976

TODAY'S REPORT PREPARED BY: Kaitlin Geagan