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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JUNE 29, 2016 
ALL TIMES ARE IN EASTERN STANDARD TIME

HUMIDITY DECREASES, SKIES CLEAR AS COLD FRONT RUNS OFFSHORE

An additional 0.08 inches of precipitation fell in the early morning
hours making the 24 hour precipitation total 0.15 ins. at 7:00AM EST this
morning.  Skies were overcast with distant fog and only 15 miles of
visibility but began to clear as the day continued.  Humidity measured
90-100% in the morning; however, it had fallen to 60% by the 1:00PM
EST observation.

Overnight temperatures were warmer than average reaching an overnight
low of 66F, 5F above normal.  They were fast to rise as clouds cleared
and hit a max. of 83F by 1:00PM EST, 4F above normal.


Today's Observations:

7 A.M. 
Weather: Broken stratus fractus, broken stratus, overcast stratus
Temperature: 68F; Dew Point: 68F; Wind: S at 10G16 kts
Sea-level pressure: 29.88 in. Hg, rising, then more slowly
Visibility: 15 miles, distant fog
6-hr Max temp: 68F 
6-hr Min temp: 66F
24-hr precip: 0.15 in.
BHO SA 1155 E9 BKN 15 BKN 22 OVC 15 119/68/68/1910G16/988/ DSNT FG/ 
8/6// 51001 ASOS 70015 MANUAL 70015 10068 20066

10 A.M.
Weather: Broken stratocumulus
Temperature: 76F; Dew Point: 67F; Wind: S at 8 kts
Sea-level pressure: 29.87 in. Hg, rising, then falling
Visibility: 20 miles
BHO SA 1455 E64 BKN 20 116/76/67/1708/987/ 8/500 58003
 
1 P.M.
Weather: Few cumulus in all directions, broken stratocumulus
Temperature: 83F; Dew Point: 66F; Wind: SW at 10 kts
Sea-level pressure: 29.84 in. Hg, falling, then more quickly
Visibility: 40 miles
6-hr Max temp: 83F 
6-hr Min temp: 68F
BHO SA 1755 E36 BKN 40 106/83/66/2210/984/ FEW CU ALQDS/ 
8/800 58010 10083 20068
 
SUMMARY FOR TUESDAY, JUNE 28, 2016 
 
TEMPERATURE (DEGREES F)
MAX.....77   NORMAL.....79
MIN.....66   NORMAL.....61 
MEAN....72   NORMAL.....70

DEPARTURE FROM 30-YEAR NORMAL.........................+2
TOTAL DEPARTURE FOR THE MONTH........................+30 [+0.9 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............0   DEPARTURE..........-1
TOTAL HEATING UNITS FOR THE MONTH..............34   DEPARTURE.........-38
TOTAL HEATING UNITS FOR THE SEASON...........5282   DEPARTURE.......-1093
TOTAL HEATING UNITS LAST SEASON TO DATE......6501   DIFFERENCE......-1219

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............7   DEPARTURE..........+2
TOTAL COOLING UNITS FOR THE MONTH..............88   DEPARTURE..........-5
TOTAL COOLING UNITS FOR THE SEASON............136   DEPARTURE.........+19
TOTAL COOLING UNITS LAST SEASON TO DATE.......132   DIFFERENCE.........+4   

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................26 S  AT  5:22 P.M.  
                   ASOS........................27 S  AT  5:27 P.M.     
                   DAVIS.......................26 S  AT  2:05 A.M. RMY 27
FASTEST MILE FOR YESTERDAY.....................18 S  AT  3:29 P.M.    
MAXIMUM 2-MINUTE ASOS AVERAGE..................18 S  AT  5:40 P.M.      
MAXIMUM 2-MINUTE DAVIS AVERAGE.................18 S  AT  2:05 A.M.     
AVERAGE WIND SPEED AND DIRECTION...............12.6 S
                   ASOS........................12.4
                   DAVIS.......................11.4 S [180 Deg.]
* Last of several occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.15  DEPARTURE......+0.05
                         ASOS..............0.15
TOTAL PRECIPITATION FOR THE MONTH..........1.61  DEPARTURE......-2.47
                           ASOS............1.66
TOTAL PRECIPITATION FOR THE YEAR..........21.68  DEPARTURE......-5.06
                         ASOS.............22.10
 
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/-4/0.00/823/90                 25 W   AERO 28 W   RMY 26
6/11 68/52/60/-5/0.06/155/17                 30 SSW AERO 35 SSW RMY 31
6/12 76/51/64/-1/T/558/61                    41 W   AERO 48 W   RMY 42
6/13 70/49/60/-5/0.00/641/70                 36 NW  AERO 46 NW  RMY 38
6/14 77/50/64/-2/0.00/889/97                 32 NNW AERO 38 NNW RMY 33
6/15 83/60/72/+6/0.00/852/93                 22 NW  AERO 26 NW  RMY 25
6/16 82/62/72/+6/0.00/660/72                 26 E   AERO 28 E   RMY 27
6/17 77/59/68/+1/T/834/91                    25 E   AERO 28 E   RMY 23 TSTM
6/18 75/55/65/-2/0.00/899/98                 22 SSW AERO 24 SSE RMY N/A
6/19 79/55/67/+0/0.00/807/88                 32 S   AERO 35 S   RMY 36
6/20 81/57/69/+1/0.00/871/95                 25 S   AERO 28 S   RMY 27
6/21 82/61/72/+1/0.40/596/65                 30 WSW AERO 31 W*  RMY 33 
6/22 79/59/69/+1/0.01/495/54                 31 NW  AERO 35 NW  RMY 31
6/23 84/56/70/+2/0.00/642/70                 17 S   AERO 18 S   RMY 18
6/24 77/58/68/-1/0.00/889/97                 20 NE  AERO 21 NE  RMY 20
6/25 80/60/70/+1/0.00/.../..                 16 ENE AERO 17 ENE RMY 16
6/26 86/59/73/+4/0.00/.../..                 25 S   AERO 26 S   RMY 26
6/27 84/60/72/+3/T/.../..                    32 S   AERO 35 S*  RMY 34
6/28 77/66/72/+2/0.15/.../..                 26 S   AERO 29 S   RMY 27

6/29 low temp since midnight is 66F; normal low now 61F

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 29
HIGH 93F IN 1933
LOW 42F IN 1919
PRECIP 1.60 INS IN 1889
PEAK GUST 49 MPH S IN 1957

RECORDS FOR JUNE 29
HIGH 93F IN 1933
LOW 42F IN 1919
PRECIP 1.60 INS IN 1889
PEAK GUST 49 MPH S IN 1957

TODAY'S REPORT PREPARED BY: Cecilia Borries-Strigle