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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JUNE 17, 2018  
ALL TIMES ARE IN EASTERN STANDARD TIME

A WARMER THAN SEASONABLE DAY WITH LOW HUMIDITY AND A VERY 
LIGHT NORTHERLY WIND....

Wind stayed light and from the north most of the day, staying lower than 
8 miles an hour on average. We observed a visibility of 70 miles at each 
observation. The air has been noticeably dry, with a humidity of
33% at the 1 P.M. observation. We have reached a maximum temperature 
of 86F so far today, 10 degrees above the normal of 76F. The low 
temperature since midnight was 63F, 6 degrees above the daily normal of 57F.       

Today's Observations:

7 A.M.
Weather: Clear, few cumulus W-SE, few cirrus NE-S
Temperature: 69F; Dew Point: 54F; Wind: N at 4 kts,
Wind: Light
Sea-level pressure: 30.07 ins. Hg, rising, then steady
Visibility: 70 miles, thin smoke layer in all directions
6-hr Max temp: 69F
6-hr Min temp: 63F
24-hr Precip: 0.00 ins.
BHO SA 1155 CLR 70 182/69/54/3504/007/ FEW CU W-SE FEW CI 
NE-S THN K LYR ALQDS WND LGT/ 8/102 51012 10069 20063

10 A.M.
Weather: Scattered cirrus
Temperature: 79F; Dew Point: 49F; Wind: NNW at 2 kts,
Wind: Light and variable
Sea-level pressure: 30.11 ins. Hg, rising, then steady
Visibility: 70 miles
3-hr Precip: 0.00 ins
BHO SA 1455 250 SCT 70 196/79/49/3402/011/ WND L/V/ 8/002 51014 

1 P.M.
Weather: Scattered cirrus and cirrostratus, few cumulus
SE-SW 
Temperature: 86F; Dew Point: 53F; Wind: NE at 5G12 kts,
Wind: Light
Sea-level pressure: 30.06 ins. Hg, falling, then more slowly
Visibility: 70 miles
6-hr Max temp: 86F
6-hr Min temp: 69F
6-hr precip: 0.00 ins.
BHO SA 1755 250 SCT 70 181/86/53/0405G12/006/ FEW CU SE-SW WND LGT/ 
8/008 56015 10086 20069


SUMMARY FOR SATURDAY, JUNE 16, 2018

TEMPERATURE (DEGREES F)
MAX.....83   NORMAL.....75
MIN.....54   NORMAL.....57
MEAN....69   NORMAL.....66

DEPARTURE FROM 30-YEAR NORMAL.........................+3
TOTAL DEPARTURE FOR THE MONTH........................-27 [-1.9 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............0   DEPARTURE...........-2
TOTAL HEATING UNITS FOR THE MONTH.............62   DEPARTURE...........+6
TOTAL HEATING UNITS FOR THE SEASON..........5909   DEPARTURE.........-450
TOTAL HEATING UNITS LAST SEASON TO DATE.....5723   DIFFERENCE........+186

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............4   DEPARTURE..........+1
TOTAL COOLING UNITS FOR THE MONTH..............20   DEPARTURE.........-20
TOTAL COOLING UNITS FOR THE SEASON.............82   DEPARTURE.........+18
TOTAL COOLING UNITS LAST SEASON TO DATE.......111   DEPARTURE.........-29

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................25 NNW  AT 10:24 A.M.
                   AERO.........................24 NNW  AT 10:34 A.M. 
                   ASOS.........................26 NNW  AT 10:25 A.M.
                   DAVIS........................26 M    AT 10:59 A.M.** RMY 25
FASTEST MILE FOR YESTERDAY......................18 NNW  AT 10:26 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...................18 NNW  AT 10:26 A.M.  
MAXIMUM 2-MINUTE DAVIS AVERAGE..................17 M    AT 11:12 A.M.**
AVERAGE WIND SPEED AND DIRECTION...............9.3 W
                   ASOS........................9.9
                   DAVIS.......................8.8
**Davis direction malfunctioning 

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..........1.02  DEPARTURE......-1.56
                         ASOS..............1.04  
TOTAL PRECIPITATION FOR THE YEAR..........28.34  DEPARTURE......+3.28
                         ASOS.............29.91


PRELIMINARY CLIMATE SUMMARY FOR JUNE 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

6/01 78/62/70/+8/T/.../..            21 S   AERO 21 S   RMY N/A
6/02 79/54/67/+5/T/.../..            26 ENE AERO 25 ENE RMY 27
6/03 59/45/52/-10/0.00/.../..        28 ENE AERO 25 ENE RMY N/A  
6/04 52/45/49/-14/.../.../..         29 ENE AERO 26 ENE RMY 29
6/05 64/47/56/-7/..../.../..         24 N   AERO 21 N   RMY 23 TSTM  
6/06 66/50/58/-5/0.00/.../..         23 S   AERO 21 S   RMY 22
6/07 69/50/60/-4/0.00/.../..         25 S   AERO 25 S   RMY 27 
6/08 79/52/66/+2/0.00/.../..         20 SW  AERO 17 SW  RMY 18
6/09 79/58/69/+5/0.00/.../..         22 W   AERO 21 W   RMY 22
6/10 72/56/64/-1/0.00/.../..         20 S   AERO 18 S   RMY 17
6/11 68/51/60/-5/0.00/.../..         21 ENE AERO 20 SSW RMY N/A
6/12 77/49/63/-2/0.00/.../..         37 SW  AERO 37 SW  RMY 39
6/13 74/56/65/0/T/.../..             35 SW  AERO 36 SW  RMY 36
6/14 77/61/69/+3/..../.../..         35 W   AERO 36 WNW RMY 37
6/15 68/53/61/-5/.../.../..          17 NNW AERO 16 WNW RMY 19
6/16 83/54/69/+3/0.00/.../..         25 NNW AERO 24 NNW RMY 25

6/17 Low temp since midnight is 63F; normal low is now 58F


DAILY RECORDS FOR JUNE 2018

None so far.

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

RECORDS FOR JUNE 17
HIGH 93F IN 1894
LOW 44F IN 1920
PRECIP 2.79 INS 2001 (Sub-Tropical storm ALLISON)
PEAK GUST 55e MPH S IN 1977

RECORDS FOR JUNE 18
HIGH 93F IN 1929,1994
LOW 39F IN 1920
PRECIP 3.36 INS 1998
PEAK GUST 48e MPH W IN 1943

TODAY'S REPORT PREPARED BY: Benjamin Turner