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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, JULY 5, 2016 
ALL TIMES ARE IN EASTERN STANDARD TIME

OVERCAST SKIES AND FOG ARE SLOW TO CLEAR

Light rain began early this morning and continued as very light
drizzle through the early afternoon.  A total of 0.17 in. fell
before the 7:00AM EST observation with an additional 0.12 in. 
falling by the 10:00AM ob.  Overcast skies and fog were slow to 
clear.

A morning low temp. of 65F was measured, and temperatures reached 
a maximum of only 73F by 1:00PM.  Dew points remained in the upper
60s creating a spread of only 1-3 degrees and 90% humidity.
 
The final heating degree day total for the 2015-2016
season is 5282. This is the second lowest on record.

BHO Warmest July-June Temperature, deg F (1885-2016):

1) 52.5 in 2011-2012
2) 52.0 in 2015-2016
3) 51.0 in 1990-1991
4) 50.9 in 2001-2002
5) 50.6 in 1998-1999

BHO Fewest July-June Heating Degree Days, (1885-2016):

1) 4984 in 2011-2012
2) 5282 in 2015-2016
3) 5338 in 2001-2002
4) 5458 in 1990-1991
5) 5633 in 1998-1999

Sunshine duration for June totaled 301.6 hours 
(sun card hours) or 69 percent of the possible bright
sunshine. This makes the month the seventh sunniest 
since 1886. 

BHO Sunniest June, hours (1886-2016):

1) 336.5 in 1971  [76%]
2) 335.5 in 1908  [76%]
3) 327.4 in 1953  [74%]
4) 322.6 in 1949  [73%]
5) 313.7 in 1912  [71%]
6) 309.1 in 1965  [70%]
7) 301.6 in 2016  [69%]
8) 295.7 in 1978  [68%]
9) 295.3 in 1979  [68%]
10) 293.7 in 1901  [67%]

PRELIMINARY STATS FOR JUNE 2016 

TEMPERATURE, Deg. F
Avg. Max. 77.3 [+2.3]
Avg. Min. 57.2 [+0.1]
Mean      67.3 [+1.2]
24-hour corrected mean: 66.6
Max. for month: 86 on 26th and 30th
Min. for month: 48 on 9th

HEATING DEGREE DAYS
Total heating units: 34 [-39]  
Total for the season: 5282 [-1094] (Final seasonal total)
Total for last season: 6505

COOLING DEGREE DAYS
Total cooling units: 109 [+4]  
Total for the season: 157 [+28]
Total for last season: 138

PRECIPITATION, Inches
Total: 1.62 [-2.69]
Greatest in 24 hrs: 0.76 in. on 5th
 
WIND, mph
Avg. uncorrected wind speed: 11.2
Avg. corrected wind speed: 11.6
Prevailing wind direction: S at 24%
Peak gust and direction: 41 WNW on 8th, 41 W on 12th

SUNSHINE:
Campbell-Stokes card minutes: 18096 mins. of possible 26376 or 69%
Astronomical total minutes: 18822 mins. of possible 27423 or 69%


Today's Observations:

7 A.M. 
Weather: Light rain, overcast nimbostratus
Temperature: 66F; Dew Point: 65F; Wind: estimated SE at 6 kts,
Wind Speed: Light
Sea-level pressure: 29.81 in. Hg, falling, then more quickly
Visibility: 1/4 mile, fog
6-hr Max temp: 66F 
6-hr Min temp: 65F
24-hr precip: 0.17 in.
BHO SA 1155 E4 OVC 1/4R-F 094/66/65/E1306/981/ WND LGT/ 8/6// 
56013 ASOS 70016 MANUAL 70017 10066 20065

10 A.M.
Weather: Light drizzle, overcast stratus
Temperature: 71F; Dew Point: 69F; Wind: estimated E at 1 kt,
Wind Speed: Light
Sea-level pressure: 29.78 in. Hg, falling, then more slowly
Visibility: 3 miles, except 4 miles S-W
BHO SA 1455 E6 OVC 3L-F 084/71/69/E0901/978/ VSBY S-W 4 WND LGT/ 
8/6// 56010 ASOS 60012 MANUAL 60012

1 P.M.
Weather: Few stratus fractus in all directions, broken stratus,
overcast stratus
Temperature: 73F; Dew Point: 70F; Wind: estimated N at 6 kts,
Wind Speed: Light
Sea-level pressure: 29.76 in. Hg, falling, then more slowly
Visibility: 20 miles
6-hr Max temp: 76F 
6-hr Min temp: 66F
BHO SA 1755 E17 BKN 22 OVC 20 077/73/70/E0106/976/ FEW STFRA ALQDS 
DSNT FG ALQDS WND LGT/ 8/6// 56007 ASOS 60012 MANUAL 60012 10073 20066

SUMMARY FOR MONDAY, JULY 4, 2016 
 
TEMPERATURE (DEGREES F)
MAX.....87   NORMAL.....80
MIN.....61   NORMAL.....62 
MEAN....74   NORMAL.....71

DEPARTURE FROM 30-YEAR NORMAL.........................+3
TOTAL DEPARTURE FOR THE MONTH.........................+7 [+1.6 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............9   DEPARTURE..........+3
TOTAL COOLING UNITS FOR THE MONTH..............29   DEPARTURE..........+5
TOTAL COOLING UNITS FOR THE SEASON............186   DEPARTURE.........+33
TOTAL COOLING UNITS LAST SEASON TO DATE.......156   DIFFERENCE........+30   

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................28 SSW AT  6:46 P.M.  
                   ASOS........................28 SW  AT  6:55 P.M.     
                   DAVIS.......................26 WSW AT  2:10 P.M. RMY 28
FASTEST MILE FOR YESTERDAY.....................19 SSW AT  6:37 P.M.   
MAXIMUM 2-MINUTE ASOS AVERAGE..................22 SW  AT  7:06 P.M.      
MAXIMUM 2-MINUTE DAVIS AVERAGE.................21 SSW AT  7:06 P.M.     
AVERAGE WIND SPEED AND DIRECTION.............12.3 WSW
                   ASOS......................12.6
                   DAVIS.....................10.9 WSW [240 Deg.]
* Last of several occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.17  DEPARTURE......+0.07
                         ASOS..............0.16
TOTAL PRECIPITATION FOR THE MONTH..........0.37  DEPARTURE......-0.06
                         ASOS..............0.34
TOTAL PRECIPITATION FOR THE YEAR..........22.06  DEPARTURE......-5.34
                         ASOS.............22.46
 
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/+1/0.00/860/95                 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 TSTM
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/+2/0.15/018/02                 26 S   AERO 29 S   RMY 27 
6/29 85/66/76/+6/0.01/439/48                 28 WNW AERO 28 WNW RMY 29 TSTM
6/30 86/63/75/+5/0.00/887/97                 17 WSW AERO 18 WSW*RMY 19

PRELIMINARY CLIMATE SUMMARY FOR JULY 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
                                     
7/1  84/67/76/+6/0.20/.../..                 32 S   AERO 35 S   RMY 34 TSTM 
7/2  76/61/69/-1/0.00/.../..                 31 W   AERO 34 W   RMY 32 
7/3  83/57/70/-1/0.00/.../..                 23 W   AERO 23 W   RMY 23
7/4  87/61/74/+3/0.00/.../..                 28 SSW AERO 28 SSW RMY 28

7/5 low temp since midnight is 65F; normal low now 62F

DAILY RECORDS FOR JUNE 2016
None

DAILY RECORDS FOR JULY 2016
None so far
     
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated): 

RECORDS FOR JULY 5
HIGH 98F IN 1911
LOW 48F IN 1920, 1927 & 1979
PRECIP 1.45 INS IN 1922
PEAK GUST 44e N IN 1944

RECORDS FOR JULY 6
HIGH 99F IN 2010
LOW 47F IN 1979
PRECIP 1.43 INS IN 2005
PEAK GUST 56e MPH NNW IN 1942, 56 MPH WNW IN 1999

TODAY'S REPORT PREPARED BY: Cecilia Borries-Strigle