BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, JULY 6, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME

HEAT AND HUMIDITY BEGIN TO BUILD INTO THE REGION

Dry conditions are in place since a trace of rain 
fell on July the 4th. Haze and a thin layer of
smoke have reduced visibility significantly, with
a visibility of just 10 miles at this morning's
7:00 AM EST observation.

By the 1:00 PM EST observation visibility had only
increased to just 15 miles in all directions with hazy
conditions in place. A maximum temperature of 85F
had been recorded by this time as well.
  

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: 12,450 out of 26,376 possible, or 47%
 
Today's Observations:
 
7 A.M.
Weather: Thin broken cirrus
Temperature: 72F; Dew Point: 61F; Wind: estimated W at 5 kts
Wind Speed: Light
Sea-level pressure: 30.17 ins. Hg, rising, then more quickly
Visibility: 10 miles, hazy, thin smoke in all directions
6-hr Max temp: 72F
6-hr Min temp: 64F
24-hr precip: none
BHO SA 1155 E250 -BKN 10 217/72/61/E2805/017/ 
HAZY THN K ALQDS WND LGT/ 8/001 53006 10072 20064

10 A.M.
Weather: Broken altocumulus, few cumulus in all directions
Temperature: 80F; Dew Point: 61F; Wind: CALM
Sea-level pressure: 30.19 ins. Hg, rising, then more quickly
Visibility: 15 miles, hazy
BHO SA 1455 E70 BKN 15 224/80/61/E0000/019/ 
FEW CU ALQDS HAZY WND CALM/ 8/130 53007

1 P.M.
Weather: Scattered cumulus
Temperature: 85F; Dew Point: 59F; Wind: WSW at 8 kts,
Sea-level pressure: 29.88 ins. Hg, falling, then more slowly 
Visibility: 15 miles, hazy
6-hr Max temp: 85F
6-hr Min temp: 72F
BHO SA 1755 60 SCT 15 218/85/59/2508/017/ 
HAZY/ 8/100 55006 10085 20072


SUMMARY FOR SUNDAY, JULY 5, 2015 
  
TEMPERATURE (DEGREES F)
MAX.....82   NORMAL.....80
MIN.....58   NORMAL.....62
MEAN....70   NORMAL.....71
 
DEPARTURE FROM 30-YEAR NORMAL........................-1
TOTAL DEPARTURE FOR THE MONTH........................-5 [-1.2 DEGREES/DAY]
 
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............5   DEPARTURE..........-1
TOTAL COOLING UNITS FOR THE MONTH..............23   DEPARTURE..........-8
TOTAL COOLING UNITS FOR THE SEASON............161   DEPARTURE..........+1
TOTAL COOLING UNITS LAST SEASON TO DATE.......152   DIFFERENCE.........+9
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY...................20 WSW AT   3:12 A.M.                
                   ASOS........................20 W   AT   3:11 A.M.
                   DAVIS.......................19 WSW AT   3:10 A.M.  RMY 20
FASTEST MILE FOR YESTERDAY.....................15 W   AT   4:07 A.M.           
MAXIMUM 2-MINUTE ASOS AVERAGE..................15 W   AT   4:10 A.M.                 
MAXIMUM 2-MINUTE DAVIS AVERAGE.................15 W   AT   4:09 A.M.         
AVERAGE WIND SPEED AND DIRECTION............. .8.8 W
                   ASOS........................9.2
                   DAVIS.......................7.3 W [265 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.....+0.05 
                         ASOS...............0.60
TOTAL PRECIPITATION FOR THE YEAR.......... 24.86  DEPARTURE.....-2.52
                         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/T/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/-2/0.05/559/61               23 SSE RMY N/A
6/21 76/60/68/0/1.14/202/22                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  79/58/69/-2/0.00/.../..               17 SSW RMY 17 
7/4  74/61/68/-3/T/.../..                  16 S   RMY N/A
7/5  82/58/70/-1/0.00/.../..               20 WSW RMY 20  

7/6 low since midnight is 64F; 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 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

RECORDS FOR JULY 7
HIGH 97F IN 1908,1993
LOW 48F IN 1902
PRECIP 2.11 INS IN 1966
PEAK GUST 55 MPH NW IN 1989

TODAY'S REPORT PREPARED BY: Brian Fitzgerald