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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, JUNE 30, 2016 
ALL TIMES ARE IN EASTERN STANDARD TIME

CLEAR MORNING SKIES, LOW HUMIDITY, GREAT VISIBILITY

At the 7:00AM EST observation, 0.01 in. of precip. was measured
from a thunderstorm which quickly passed Blue Hill yesterday
afternoon.  This brought yesterday's total 24 hour precipitation
to 0.09 in. 

Cumulus clouds began to develop in the mid-morning after a completely
clear sky at 7:00AM EST.  Winds remained light but shifted direction
to be out of the W-NW shortly before midnight early this morning.
Visibility was consistently an excellent 70 miles today.

The maximum temperature at the 1:00PM EST observation was 85F, 6F
above the normal max. temp.  Dew points were in the 50s-60s resulting
in decreasing humidities into the afternoon.


Today's Observations:

7 A.M. 
Weather: Clear
Temperature: 69F; Dew Point: 60F; Wind: estimated NW at 6 kts,
Wind Speed: Light
Sea-level pressure: 29.96 in. Hg, rising, then more slowly
Visibility: 70 miles
6-hr Max temp: 69F 
6-hr Min temp: 63F
24-hr precip: 0.01 in.
BHO SA 1155 CLR 70 147/69/60/E3206/996/ SKC WND LGT/ 8/000 51017 
ASOS 70002 MANUAL 70001 10069 20063

10 A.M.
Weather: Few cumulus in all directions
Temperature: 79F; Dew Point: 57F; Wind: WNW at 7 kts
Sea-level pressure: 29.87 in. Hg, rising, then more quickly
Visibility: 70 miles
BHO SA 1455 CLR 70 153/79/57/3007/998/ FEW CU ALQDS/ 8/100 51006 
 
1 P.M.
Weather: Scattered cumulus
Temperature: 84F; Dew Point: 65F; Wind: estimated WNW at 6 kts,
Wind: Light and variable
Sea-level pressure: 29.97 in. Hg, steady, then falling
Visibility: 70 miles
6-hr Max temp: 85F 
6-hr Min temp: 68F
BHO SA 1755 54 SCT 70 149/84/65/E2906/997/ WND L/V/ 8/100 58004 
10085 20068
 
SUMMARY FOR WEDNESDAY, JUNE 29, 2016 
 
TEMPERATURE (DEGREES F)
MAX.....85   NORMAL.....79
MIN.....66   NORMAL.....61 
MEAN....76   NORMAL.....70

DEPARTURE FROM 30-YEAR NORMAL.........................+6
TOTAL DEPARTURE FOR THE MONTH........................+36 [+1.0 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.........-39
TOTAL HEATING UNITS FOR THE SEASON...........5282   DEPARTURE.......-1093
TOTAL HEATING UNITS LAST SEASON TO DATE......6505   DIFFERENCE......-1223

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY..............11   DEPARTURE..........+5
TOTAL COOLING UNITS FOR THE MONTH..............99   DEPARTURE...........0
TOTAL COOLING UNITS FOR THE SEASON............147   DEPARTURE.........+24
TOTAL COOLING UNITS LAST SEASON TO DATE.......132   DIFFERENCE........+15   

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................28 WNW AT  3:29 P.M.  
                   ASOS........................29 WNW AT  3:31 P.M.     
                   DAVIS.......................27 W   AT  3:30 P.M. RMY 29
FASTEST MILE FOR YESTERDAY.....................16 WNW AT  3:26 P.M.    
MAXIMUM 2-MINUTE ASOS AVERAGE..................17 WNW AT  3:31 P.M.      
MAXIMUM 2-MINUTE DAVIS AVERAGE.................17 S   AT  7:52 A.M.     
AVERAGE WIND SPEED AND DIRECTION...............10.0 S
                   ASOS........................10.1
                   DAVIS........................9.2 SSW [200 Deg.]
* Last of several occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.01  DEPARTURE......-0.11
                         ASOS..............0.02
TOTAL PRECIPITATION FOR THE MONTH..........1.62  DEPARTURE......-2.58
                         ASOS..............1.68
TOTAL PRECIPITATION FOR THE YEAR..........21.69  DEPARTURE......-5.17
                         ASOS.............22.12
 
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/+1/0.00/889/97                 16 ENE AERO 17 ENE RMY 16
6/26 86/59/73/+4/0.00/870/95                 25 S   AERO 26 S   RMY 26
6/27 84/60/72/+3/T/641/70                    32 S   AERO 35 S*  RMY 34
6/28 77/66/72/+2/0.15/.../..                 26 S   AERO 29 S   RMY 27 TSTM
6/29 85/66/76/+6/0.01/.../..                 28 WNW AERO 28 WNW RMY 29

6/30 low temp since midnight is 63F; 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 JULY 1
HIGH 98F IN 1964
LOW 44F IN 1988 [RECORD FOR MONTH]
PRECIP 4.46 INS IN 1915 [RECORD FOR MONTH]
PEAK GUST 52 MPH WNW IN 1974

TODAY'S REPORT PREPARED BY: Cecilia Borries-Strigle