BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JULY, 3 2015 
ALL TIMES ARE IN EASTERN STANDARD TIME

BLUE SKIES REIGN SUPREME THIS MORNING,
STABLE, NEAR NORMAL PATTERN CONTINUES

Cool temperatures overnight dipped to a minimum
temperature of 58F, which is 4 degrees below the
daily norm. Clear and dry conditions allowed for
an impressive 80 miles of visibility at this morning's
7:00 AM EST observation.

June sunshine came in at 47% for the month, 
or 8% below normal. 


PRELIMINARY STATS FOR JUNE 2015

TEMPERATURE, Deg. F
Avg. Max. 72.9 [-2.1]
Avg. Min. 55.8 [-1.3]
Mean      64.4 [-1.7]
Corrected mean: 63.9
Max. for month: 86 on 6/12
Min. for month: 44 on 6/2 and 6/3

HEATING DEGREE DAYS
Total heating units: 101 [+28]
Total for the season: 6505 [+129]
Total for last season: 6422

COOLING DEGREE DAYS
Total cooling units: 89 [-16]
Total for the season: 138 [+9]
Total for last season: 109

PRECIPITATION, Inches
Total: 4.90 [+0.59]
Greatest in 24 hrs: N/A

WIND, mph
Avg. uncorrected wind speed: 10.4
Avg. corrected wind speed: 10.9
Prevailing wind direction: S @ 12%
Peak gust and direction: 41 SSW on the 8th

SUNSHINE:
Astronomical total minutes:  12,941 out of 27,416 possible, or 47%
Campbell-Stokes card minutes: 12,470 out of 26,376 possible, or 47%

 
Today's Observations:
 
7 A.M.
Weather: Clear, few cumulus and cirrus distant WNW-N
Temperature: 65F; Dew Point: 52F; Wind: estimated N at 5 kts,
Wind Speed: Light
Sea-level pressure: 29.97 ins. Hg, rising, then more quickly
Visibility: 80 miles
6-hr Max temp: 65F
6-hr Min temp: 58F
24-hr precip: none
BHO SA 1155 CLR 80 148/65/52/E3605/997/ FEW CU DSNT WNW-N 
FEW CI DSNT WNW-N WND LGT/ 8/101 53020 10065 20058

10 A.M.
Weather: Clear, few cumulus S and W-NNE, few cirrus distant 
SE-S and WNW-N
Temperature: 74F; Dew Point: 51F; Wind: estimated WNW at 6 kts,
Wind Speed: Light
Sea-level pressure: 29.95 ins. Hg, rising, then falling but higher
Visibility: 80 miles
BHO SA 1455 CLR 80 143/74/51/E3006/995/ FEW CU S AND W-NNE 
FEW CI DSNT SE-S AND WNW-N WND LGT/ 8/101 50005

1 P.M.
Weather: Clear, few small cumulus in all directions,
few cirrostratus distant SE-SSW
Temperature: 78F; Dew Point: 53F; Wind: WNW at 7 kts,
Sea-level pressure: 29.96 ins. Hg, slightly higher
Visibility: 80 miles
BHO SA 1455 CLR 80 144/78/53/2907/996/ FEW SML CU ALQDS 
FEW CS DSNT SE-SSW/ 8/108 52001 10078 20065 


SUMMARY FOR THURSDAY, JULY 2, 2015 
  
TEMPERATURE (DEGREES F)
MAX.....78   NORMAL.....79
MIN.....60   NORMAL.....62
MEAN....69   NORMAL.....70
 
DEPARTURE FROM 30-YEAR NORMAL........................-1 
TOTAL DEPARTURE FOR THE MONTH........................+1 [+0.3 DEGREES/DAY]
 
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............4   DEPARTURE..........-2
TOTAL COOLING UNITS FOR THE MONTH..............11   DEPARTURE..........-1
TOTAL COOLING UNITS FOR THE SEASON............149   DEPARTURE..........+8
TOTAL COOLING UNITS LAST SEASON TO DATE.......134   DIFFERENCE........+15
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY...................23  WNW  AT   3:54 A.M.   
                   ASOS........................24  W    AT   3:54 A.M.
                   DAVIS.......................22  WNW  AT   MISSING   RMY N/A
FASTEST MILE FOR YESTERDAY.....................18  WNW  AT   3:53 A.M.  
MAXIMUM 2-MINUTE ASOS AVERAGE..................20  W    AT   3:49 A.M.    
MAXIMUM 2-MINUTE DAVIS AVERAGE.................16  W    AT   MISSING  
AVERAGE WIND SPEED AND DIRECTION............. 10.3 W
                   ASOS.......................10.5
                   DAVIS.......................9.1 W [266] deg.

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.00  DEPARTURE.....-0.11
                         ASOS...............0.00
TOTAL PRECIPITATION FOR THE MONTH...........0.59  DEPARTURE.....+0.37 
                         ASOS...............0.60
TOTAL PRECIPITATION FOR THE YEAR.......... 24.86   DEPARTURE....-2.20
                         ASOS...............N/A ***

*** ASOS annual totals not available due to erroneous readings
 
PRELIMINARY CLIMATE SUMMARY FOR JUNE CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/RMY 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  48/46/47/-15/0.69/000/00              32 NE  RMY 34 
6/2  47/44/46/-16/0.78/000/00              28 NNE RMY 28 
6/3  59/44/52/-10/0.00/172/19              16 ESE RMY 16
6/4  63/46/55/-8/0.00/445/49               17 E   RMY 16
6/5  70/49/60/-3/T/500/55                  17 NNE RMY 17
6/6  65/52/59/-4/0.06/382/42               26 ENE RMY 27
6/7  73/49/61/-3/0.00/884/97               28 S   RMY 29
6/8  73/50/62/-2/T/310/34                  41 SSW RMY 48
6/9  76/61/69/+4/0.03/228/25               29 SSW RMY 32  
6/10 82/57/70/+5/0.00/840/92               24 WSW RMY N/A  
6/11 85/61/73/+8/0.00/594/65               29 SSW RMY 32
6/12 86/65/76/+11/0.00/522/57              26 S   RMY 29 
6/13 83/67/75/+10/T/586/64                 24 N   RMY 27
6/14 75/61/68/+2/0.00/641/70               21 SSE RMY 21
6/15 61/52/57/-9/0.60/000/00               25 SE  RMY 26
6/16 73/56/65/-1/..../009/01               18 NW  RMY N/A 
6/17 70/57/64/-3/0.00/605/66               28 NE  RMY 28
6/18 76/54/65/-2/0.00/669/73               22 S   RMY 26
6/19 84/60/72/+5/T/642/70                  24 SSW RMY 22
6/20 75/56/66/-2/..../559/61               23 SSE RMY N/A
6/21 76/60/68/0/..../202/22                26 S   RMY 29
6/22 83/63/73/+5/0.00/770/84               20 WNW RMY 19
6/23 85/67/76/+8/0.01/284/31               36 S   RMY 38
6/24 82/62/72/+3/0.00/899/98               25 WNW RMY 27
6/25 80/60/70/+1/0.00/605/66               21 W   RMY N/A 
6/26 72/58/65/-4/0.01/540/59               23 NNE RMY 21
6/27 73/56/65/-4/..../202/22               32 ESE RMY N/A 
6/28 59/50/55/-15/..../000/00              39 ENE RMY 38
6/29 71/50/61/-9/..../110/12               17 SSW RMY 18
6/30 81/60/71/+1/T/741/81                  21 S   RMY N/A

7/1  80/63/72/+2/0.59/.../..               30 SSE RMY 33  TSTM
7/2  78/60/69/-1/0.00/.../..               23 WNW RMY N/A

7/3 low since midnight is 58F; normal low is now 62F
 
DAILY RECORDS FOR JUNE AND JULY 2015

6/1- NEW RECORD LOW MAXIMUM TEMPERATURE OF 48F
surpasses previous record of 51F in 2004
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated): 

RECORDS FOR JULY 3
HIGH 99F IN 1911
LOW 47F IN 1914
PRECIP 1.36 IN 1985
PEAK GUST 52 MPH NW IN 1963

RECORDS FOR JULY 4
HIGH 98F IN 1911, 1919, 1949
LOW 48F IN 1914
PRECIP 2.48 IN 2014
PEAK GUST 50e MPH WNW IN 1949

TODAY'S REPORT PREPARED BY: Brian Fitzgerald