BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, JULY 2, 2015 
ALL TIMES ARE IN EASTERN STANDARD TIME

CLEAR, NEAR NORMAL CONDITIONS 
FOLLOWING BRIEF OVERNIGHT DELUGE

Midnight to midnight rainfall totaled 0.59 inches
of new precipitation, continuing a recently wetter-
than-average streak. Beginning at 8:00 AM EST a
heavy rain shower moving SE across the summit dumped
0.13 inches of new rain in about 30 minutes, with
the majority falling in less than 10 minutes.

Clear conditions this morning have been thanks in 
part to just a thin layer of scattered cirrus overhead.
Temperatures have slowly warmed to a maximum of 78F
by the 1:00 PM EST observation.


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:   N/A
Campbell-Stokes card minutes: N/A

 
Today's Observations:
 
7 A.M.
Weather: Thin scattered cirrus
Temperature: 66F; Dew Point: 58F; Wind: W at 10 kts,
Sea-level pressure: 29.89 ins. Hg, rising, then more quickly
Visibility: 50 miles, light distant haze 
6-hr Max temp: 66F
6-hr Min temp: 60F
24-hr precip: 0.34 inches
BHO SA 1155 250 -SCT 50 121/66/58/2610/989/ LGT DSNT HZ 
ALQDS/ 8/001 53016 ASOS 70039 MANUAL 70034 10066 20060

10 A.M.
Weather: Clear, few small cumulus in all directions,
few cirrus/cirrocumulus in all directions 
Temperature: 73F; Dew Point: 55F; Wind: SW at 9 kts,
Sea-level pressure: 29.91 ins. Hg, rising, then more slowly
Visibility: 60 miles, light distant haze
BHO SA 1455 CLR 60 130/73/55/2309/991/ FEW SML CU ALQDS 
FEW CI/CC ALQDS LGT DSNT HZ ALQDS/ 8/101 51009 

1 P.M.
Weather: Scattered cumulus, thin broken cirrus
Temperature: 76F; Dew Point: 55F; Wind: W at 8 kts,
Sea-level pressure: 29.89 ins. Hg, rising, then falling and lower
Visibility: 50 miles, light distant haze
6-hr Max temp: 78F  
6-hr Min temp: 66F
BHO SA 1755 60 SCT E250 -BKN 50 122/76/55/2608/989/ 
LGT DSNT HZ ALQDS/ 8/101 58008 10078 20066 


SUMMARY FOR WEDNESDAY, JULY 1, 2015 
  
TEMPERATURE (DEGREES F)
MAX.....80   NORMAL.....79
MIN.....63   NORMAL.....61
MEAN....72   NORMAL.....70
 
DEPARTURE FROM 30-YEAR NORMAL........................+2 
TOTAL DEPARTURE FOR THE MONTH........................+2 [+1.8 DEGREES/DAY]
 
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............7   DEPARTURE..........+1
TOTAL COOLING UNITS FOR THE MONTH...............7   DEPARTURE..........+1
TOTAL COOLING UNITS FOR THE SEASON............145   DEPARTURE.........+10
TOTAL COOLING UNITS LAST SEASON TO DATE.......120   DIFFERENCE........+25
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY...................30  SSE  AT   7:22 A.M.                  
                   ASOS........................31  SSE  AT   7:23 A.M.
                   DAVIS.......................33  SSE  AT   7:23 A.M. RMY 33
FASTEST MILE FOR YESTERDAY.....................24  SSW  AT   1:39 P.M.           
MAXIMUM 2-MINUTE ASOS AVERAGE..................24  SW   AT   1:44 P.M.                 
MAXIMUM 2-MINUTE DAVIS AVERAGE.................23  SSW  AT   1:44 P.M.          
AVERAGE WIND SPEED AND DIRECTION............. 15.6 SE
                   ASOS.......................14.8
                   DAVIS......................13.9 S [186] deg.

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.34  DEPARTURE.....+0.23
                         ASOS...............0.39
TOTAL PRECIPITATION FOR THE MONTH...........0.59  DEPARTURE.....+0.48 
                         ASOS...............0.60
TOTAL PRECIPITATION FOR THE YEAR.......... 24.86   DEPARTURE....-2.09
                         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/..../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/..../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/..../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/.../..               23 NNE RMY 21
6/27 73/56/65/-4/..../.../..               32 ESE RMY N/A 
6/28 59/50/55/-15/..../000/00              39 ENE RMY 38
6/29 71/50/61/-9/..../.../..               17 SSW RMY 18
6/30 81/60/71/+1/T/.../..                  21 S   RMY N/A

7/1  80/63/72/+2/0.59/.../..               30 SSE RMY 33

7/2 low since midnight is 60F; normal low is now 62F
 
DAILY RECORDS FOR JUNE 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 2
HIGH 95F IN 1963
LOW 47F IN 1988
PRECIP 1.42 INS IN 1986
PEAK GUST 45 MPH SW IN 1999

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

TODAY'S REPORT PREPARED BY: Brian Fitzgerald