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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JUNE 10, 2016 
ALL TIMES ARE IN EASTERN STANDARD TIME

LOW PRESSURE SYSTEM CONTINUES TO BRING BELOW AVERAGE
TEMPERATURES TO THE REGION

Below normal temperatures continued today with an overnight low
of 50F, 6F below average.  The maximum temperature by 1:00PM EST
was 68F, 5F below average.

For the first day this month, visibility increased to 70 miles 
during the observations.  Winds remained from the WNW 
  

Today's Observations:

7 A.M. 
Weather: Scattered altocumulus, broken cirrus
Temperature: 55F; Dew Point: 41F; Wind: NW at 10G18 kts
Sea-level pressure: 29.88 ins. Hg, rising, then steady
Visibility: 70 miles
6-hr Max temp: 55F 
6-hr Min temp: 50F
24-hr precip: 0.00 in.
BHO SA 1155 84 SCT E250 BKN 70 117/55/41/3110G18/988/ 
8/051 51018 10055 20050

10 A.M.
Weather: Scattered cumulus, scattered cirrostratus
Temperature: 62F; Dew Point: 45F; Wind: WNW at 9G16 kts
Sea-level pressure: 29.91 ins. Hg, rising, then more slowly
Visibility: 70 miles
BHO SA 1455 36 SCT 250 SCT 70 127/62/45/3009G16/991/ 8/108 51010

1 P.M.
Weather: Broken cumulus, broken cirrus
Temperature: 68F; Dew Point: 47F; Wind: NW at 12G17 kts
Sea-level pressure: 29.94 ins. Hg, rising, then falling
Visibility: 70 miles
6-hr Max temp: 68F
6-hr Min temp: 55F
BHO SA 1755 E59 BKN 250 BKN 70 139/68/47/3212G17/994/ 
8/101 50012 10068 20055

SUMMARY FOR THURSDAY, JUNE 9, 2016 
  
TEMPERATURE (DEGREES F)
MAX.....67   NORMAL.....73
MIN.....48   NORMAL.....55 
MEAN....58   NORMAL.....64

DEPARTURE FROM 30-YEAR NORMAL.........................-6
TOTAL DEPARTURE FOR THE MONTH........................+19 [+1.9 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............7   DEPARTURE..........+4
TOTAL HEATING UNITS FOR THE MONTH..............18   DEPARTURE.........-19
TOTAL HEATING UNITS FOR THE SEASON...........5266   DEPARTURE.......-1074
TOTAL HEATING UNITS LAST SEASON TO DATE......6482   DIFFERENCE......-1216

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............0   DEPARTURE..........-3
TOTAL COOLING UNITS FOR THE MONTH..............19   DEPARTURE..........+0
TOTAL COOLING UNITS FOR THE SEASON.............67   DEPARTURE.........+24
TOTAL COOLING UNITS LAST SEASON TO DATE........53   DIFFERENCE........+14    

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................41 WNW AT 12:01 P.M.  
                   ASOS........................43 WNW AT 12:01 P.M.   
                   DAVIS.......................41  W  AT 12:38 P.M. RMY 40
FASTEST MILE FOR YESTERDAY.....................30 WNW AT  3:08 P.M.*   
MAXIMUM 2-MINUTE ASOS AVERAGE..................28 WNW AT  3:10 P.M.   
MAXIMUM 2-MINUTE DAVIS AVERAGE.................27 WNW AT  3:11 P.M.  
AVERAGE WIND SPEED AND DIRECTION.............17.1 WNW 
                   ASOS......................15.7
                   DAVIS.....................14.2 WNW [290 Deg.]
* Last of several occurrences

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..........0.99  DEPARTURE......-0.50
                         ASOS..............1.02
TOTAL PRECIPITATION FOR THE YEAR..........21.06  DEPARTURE......-3.09
                         ASOS.............21.46
 
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

6/1 71/54/63/+1/0.00/.../..                 26 NE  AERO 30 NE  RMY N/A
6/2 68/54/61/-1/0.00/.../..                 21 NE  AERO 22 NE  RMY 21
6/3 70/57/64/+2/T/.../..                    16 SSW AERO 17 SSW RMY 16
6/4 81/61/71/+8/0.00/.../..                 18 S   AERO 21 S   RMY 20
6/5 67/60/64/+1/0.76/000/00                 32 SSE AERO 36 SSE RMY 34  
6/6 80/63/72/+9/0.00/.../..                 26 W   AERO 28 W   RMY 27 
6/7 83/58/71/+7/0.18/.../..                 32 WNW AERO 36 WNW RMY 33 TSTM 
6/8 72/52/62/-2/0.05/.../..                 37 WNW AERO 41 WNW RMY 38
6/9 67/48/58/-6/0.00/.../..                 41 WNW AERO 45 WNW RMY 40

6/10 low temp since midnight is 50F; normal low now 56F

* Last of several occurrences  

DAILY RECORDS FOR JUNE 2016
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: Cecilia Borries-Strigle