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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JUNE 10, 2018  
ALL TIMES ARE IN EASTERN STANDARD TIME

A DRY, SEASONABLE DAY WITH LIGHT WIND AND CLOUDS INCREASING
IN THE AFTERNOON....

It has been a considerably dry day so far, with the dew point staying
around 40F. This has allowed the visibility to stay at 70 miles for
each observation time. Wind has been light and variable for most of
the day, with a speed less than 10 mph. The wind shifted from north
to east around noon. High clouds have been increasing since this morning,
but have not covered the whole sky. The maximum temperature so far 
is 72F, a degree under the daily normal of 73F. The minimum temperature 
since midnight is 56F, which is also the normal minimum.

Today's Observations:

7 A.M.
Weather: Scattered cirrus, broken cirrostratus
Temperature: 65F; Dew Point: 44F; Wind: NNW at 4 kts,
Wind: Light  
Sea-level pressure: 30.09 ins. Hg, steady
Visibility: 70 miles
6-hr Max temp: 65F
6-hr Min temp: 56F
24-hr Precip: 0.00 ins.
BHO SA 1155 220 SCT E250 BKN 70 188/65/44/3304/009/ WND LGT/ 8/002 
50001 10065 20056

10 A.M.
Weather: Scattered cirrus, broken cirrostratus
Temperature: 70F; Dew Point: 42F; Wind: E at 7G12 kts
Sea-level pressure: 30.09 ins. Hg, steady
Visibility: 70 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 220 SCT E250 BKN 70 189/70/42/0807G12/009/ 8/002 50001

1 P.M.
Weather: Broken cirrostratus
Temperature: 72F; Dew Point: 40F; Wind: S at 3 kts,
Wind: Light and variable
Sea-level pressure: 30.06 ins. Hg, falling, then more quickly
Visibility: 70 miles
6-hr Max temp: 72F
6-hr Min temp: 65F
6-hr precip: 0.00 ins.
BHO SA 1755 E250 BKN 70 181/72/40/1703/006/ WND L/V/ 8/008 58008 10072 20065


SUMMARY FOR SATURDAY, JUNE 9, 2018

TEMPERATURE (DEGREES F)
MAX.....79   NORMAL.....73
MIN.....58   NORMAL.....55
MEAN....69   NORMAL.....64

DEPARTURE FROM 30-YEAR NORMAL.........................+5
TOTAL DEPARTURE FOR THE MONTH........................-20 [-2.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............0   DEPARTURE...........-3
TOTAL HEATING UNITS FOR THE MONTH.............50   DEPARTURE..........+13
TOTAL HEATING UNITS FOR THE SEASON..........5897   DEPARTURE.........-443
TOTAL HEATING UNITS LAST SEASON TO DATE.....5721   DIFFERENCE........+176

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............4   DEPARTURE..........+1
TOTAL COOLING UNITS FOR THE MONTH..............12   DEPARTURE..........-7
TOTAL COOLING UNITS FOR THE SEASON.............74   DEPARTURE.........+31
TOTAL COOLING UNITS LAST SEASON TO DATE........59   DEPARTURE.........+15

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................22  W   AT 2:27 P.M.
                   AERO.........................21  W   AT 3:41 P.M. 
                   ASOS.........................22  W   AT 3:43 P.M.
                   DAVIS........................22  M   AT 2:25 P.M.** RMY 22
FASTEST MILE FOR YESTERDAY......................16  W   AT 3:46 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...................17  W   AT 3:43 P.M.  
MAXIMUM 2-MINUTE DAVIS AVERAGE..................17  M   AT 3:43 P.M.**
AVERAGE WIND SPEED AND DIRECTION...............8.7 N
                   ASOS........................9.0
                   DAVIS.......................8.7
** Davis direction malfunctioning 

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.16
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........1.01  DEPARTURE......-0.48
                         ASOS..............1.04  
TOTAL PRECIPITATION FOR THE YEAR..........28.33  DEPARTURE......+4.36
                         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/+5/0.00/.../..         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 Low temp since midnight is 56F; normal low is now 56F


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 10
HIGH 98F IN 2008
LOW 42F IN 1913,1920
PRECIP 2.51 INCHES IN 1931
PEAK GUST 60e MPH NW IN 1941

RECORDS FOR JUNE 11
HIGH 92F IN 1973, 1984
LOW 40F IN 1972
PRECIP 2.66 INCHES IN 1922
PEAK GUST 43e MPH S IN 1945

TODAY'S REPORT PREPARED BY: Benjamin Turner