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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JUNE 19, 2016 
ALL TIMES ARE IN EASTERN STANDARD TIME

CONTINUING HIGH PRESSURE BRINGS CLEAR SKIES AND LOW HUMIDITY

Yesterday's light winds gradually swept from southwest to north to 
east then back to south and have remained out of the south through 
this afternoon.  Visibility reduced to 55 miles by 1:00PM EST due to
distant haze.

Skies remained very clear with few cirrus and cumulus present during
the observations.  Dew points were in the low 50s resulting in humidity 
being in the 40-60% range.

The overnight low was 55F.  Temperatures reached a max. of 79F by the 
1:00PM observation.

Today's Observations:

7 A.M. 
Weather: Few cirrus in all directions
Temperature: 63F; Dew Point: 52F; Wind: S at 8 kts
Sea-level pressure: 30.32 in. Hg, falling, then rising
Visibility: 70 miles, distant haze
6-hr Max temp: 63F 
6-hr Min temp: 55F
24-hr precip: 0.00 in.
BHO SA 1155 CLR 70 268/63/52/1708/032/ FEW CI ALQDS DSNT HZ/ 
8/001 53001 10063 20055

10 A.M.
Weather: Few cirrus in all directions
Temperature: 75F; Dew Point: 52F; Wind: S at 10 kts
Sea-level pressure: 30.32 in. Hg, falling, then rising but same as 3 hours
before
Visibility: 70 miles, distant haze
BHO SA 1455 CLR 70 268/75/52/1810/032/ FEW CI ALQDS DSNT HZ/ 8/001 55000

1 P.M.
Weather: Few cumulus W-NW, few cirrus in all directions
Temperature: 78F; Dew Point: 54F; Wind: S at 14G21 kts
Sea-level pressure: 30.27 in. Hg, falling, then less quickly
Visibility: 55 miles, distant haze
6-hr Max temp: 79F
6-hr Min temp: 64F
BHO SA 1755 CLR 55 252/78/54/1714G21/027/ FEW CU W-NW FEW CI ALQDS DSNT HZ/ 
8/101 58016 10079 20064

SUMMARY FOR SATURDAY, JUNE 18, 2016 
 
TEMPERATURE (DEGREES F)
MAX.....75   NORMAL.....76
MIN.....55   NORMAL.....58 
MEAN....65   NORMAL.....67

DEPARTURE FROM 30-YEAR NORMAL.........................-2
TOTAL DEPARTURE FOR THE MONTH........................+13 [+0.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............0   DEPARTURE..........-2
TOTAL HEATING UNITS FOR THE MONTH..............34   DEPARTURE.........-26
TOTAL HEATING UNITS FOR THE SEASON...........5282   DEPARTURE.......-1081
TOTAL HEATING UNITS LAST SEASON TO DATE......6491   DIFFERENCE......-1209

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............0   DEPARTURE..........-4
TOTAL COOLING UNITS FOR THE MONTH..............36   DEPARTURE.........-11
TOTAL COOLING UNITS FOR THE SEASON.............84   DEPARTURE.........+13
TOTAL COOLING UNITS LAST SEASON TO DATE........90   DIFFERENCE.........-6   

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................22 SSW AT 12:24 A.M. 
                   ASOS........................22 SSW AT 12:24 A.M.   
                   DAVIS.......................22 S   AT 12:24 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY.....................17 SSW AT 12:51 A.M.   
MAXIMUM 2-MINUTE ASOS AVERAGE..................17 SW  AT 12:55 A.M.    
MAXIMUM 2-MINUTE DAVIS AVERAGE.................17 SSW AT 12:19 A.M.  
AVERAGE WIND SPEED AND DIRECTION..............10.4 ENE
                   ASOS.......................10.5
                   DAVIS.......................9.4 SE [130 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..........1.05  DEPARTURE......-1.81
                         ASOS..............1.08
TOTAL PRECIPITATION FOR THE YEAR..........21.12  DEPARTURE......-4.40
                         ASOS.............21.52
 
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/+1/0.00/860/95                 26 NE  AERO 30 NE  RMY N/A
6/2  68/54/61/-1/0.00/444/49                 21 NE  AERO 22 NE  RMY 21
6/3  70/57/64/+2/T/173/19                    16 SSW AERO 17 SSW RMY 16
6/4  81/61/71/+8/0.00/491/54                 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/+9/0.00/747/82                 26 W   AERO 28 W   RMY 27 
6/7  83/58/71/+7/0.18/602/66                 32 WNW AERO 36 WNW RMY 33 TSTM 
6/8  72/52/62/-2/0.05/684/75                 37 WNW AERO 41 WNW RMY 38 TSTM
6/9  67/48/58/-6/0.00/466/51                 41 WNW AERO 45 WNW RMY 40
6/10 71/50/61/-4/0.00/841/92                 25 W   AERO 28 W   RMY 26
6/11 68/52/60/-5/0.06/.../..                 30 SSW AERO 35 SSW RMY 31
6/12 76/51/64/-1/T/.../..                    41 W   AERO 48 W   RMY 42
6/13 70/49/60/-5/0.00/.../..                 36 NW  AERO 46 NW  RMY 38
6/14 77/50/64/-2/0.00/.../..                 32 NNW AERO 38 NNW RMY 33
6/15 83/60/72/+6/0.00/.../..                 22 NW  AERO 26 NW  RMY 25
6/16 82/62/72/+6/0.00/.../..                 26 E   AERO 28 E   RMY 27
6/17 77/59/68/+1/T/.../..                    25 E   AERO 28 E   RMY 23 TSTM
6/18 75/55/65/-2/0.00/.../..                 22 SSW AERO 24 SSE RMY N/A

6/19 low temp since midnight is 55F; normal low now 58F

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 19
HIGH 92F IN 1923
LOW 40F IN 1920
PRECIP 3.92 INS 1922
PEAK GUST 66e MPH NW IN 1940

RECORDS FOR JUNE 20
HIGH 94F IN 1953
LOW 41F IN 1918
PRECIP 2.62 INS 1945
PEAK GUST 63 MPH NE IN 1967, SSW IN 2010 

TODAY'S REPORT PREPARED BY: Cecilia Borries-Strigle