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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JULY 12, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME
 
WARM, DRY WEATHER CONTINUES TODAY
 
Heat has been building into the region today, with temperatures 
climbing into the mid 80s this afternoon after a fairly cool morning 
low of 67F.  Bright sunshine has accompanied the warmth, with clear but 
hazy conditions. Winds have been light today, from the Southwest most 
of the day. 
 
Dry and warm conditions will continue this afternoon for what promises 
to be a beautiful day. 
 
Today's Observations:

7 A.M.
Weather: Clear
Temperature: 71F; Dew Point: 60F; Wind: W at 9 kts
Sea-level pressure: 30.01 ins. Hg, decreasing
Visibility: 20 miles, haze
6-hr Max temp: 69F
6-hr Min temp: 67F
24-hr precip: none
BHO SA 1155 CLR 30 163/71/60/2709/001/ SKC DSNT HZ/  8/000  50004 
10069 20067
 
10 A.M.
Weather: Clear
Temperature: 81F; Dew Point: 65F; Wind: Estimated WNW at 5 kts,
Wind: light
Sea-level pressure: 30.00 ins. Hg, steady
Visibility: 20 miles, haze
BHO SA 1455 CLR 20 162/81/65/E2205/000/ SKC HAZY/ 8/000 58001
 
1 P.M.
Weather: Clear
Temperature: 86F; Dew Point: 59F; Wind: SW at 7 kts
Sea-level pressure: 30.00 ins. Hg, falling slightly
Wind: Light
Visibility: 15 miles,haze
6-hr Max temp: 86F
6-hr Min temp: 69F
BHO SA 1755 CLR 15 161/86/59/2207/000/ SKC HAZY/ 8/000
58001 10086 20069
 
SUMMARY FOR SATURDAY, JULY 11, 2015
  
TEMPERATURE (DEGREES F)
MAX.....84   NORMAL.....81
MIN.....61   NORMAL.....63
MEAN....73   NORMAL.....72

DEPARTURE FROM 30-YEAR NORMAL........................+1
TOTAL DEPARTURE FOR THE MONTH........................+3 [+0.1 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............8   DEPARTURE.......... 0
TOTAL COOLING UNITS FOR THE MONTH..............71   DEPARTURE..........-1
TOTAL COOLING UNITS FOR THE SEASON............207   DEPARTURE..........+9
TOTAL COOLING UNITS LAST SEASON TO DATE.......209   DIFFERENCE......... 0

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY...................21  NW   AT   3:27 A.M.               
                   ASOS........................22  NW   AT   3:28 A.M.
                   DAVIS.......................18  NW   AT   4:27 A.M.  RMY 19
FASTEST MILE FOR YESTERDAY.....................12  NW   AT   2:35 A.M.         
MAXIMUM 2-MINUTE ASOS AVERAGE..................15  NW   AT   3:08 A.M.                
MAXIMUM 2-MINUTE DAVIS AVERAGE.................12  NW   AT   6:37 A.M.        
AVERAGE WIND SPEED AND DIRECTION...............8.7 NW
                   ASOS........................8.7
                   DAVIS.......................7.0 WNW [293 deg.]
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.00  DEPARTURE.....-0.13
                         ASOS...............0.00
TOTAL PRECIPITATION FOR THE MONTH...........2.64  DEPARTURE.....+1.30
                         ASOS...............2.69
TOTAL PRECIPITATION FOR THE YEAR.......... 26.91  DEPARTURE.....-1.18
                         ASOS...............N/A ***
 
*** ASOS annual totals not available due to erroneous readings

PRELIMINARY CLIMATE SUMMARY FOR JULY 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
 
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  85/64/75/+4/0.00/.../..               20 S   RMY 21
7/7  84/65/75/+4/0.02/.../..               35 S   RMY 40
7/8  87/68/78/+6/T/.../..                  23 NE  RMY N/A
7/9  73/61/67/-5/..../.../..               24 NE  RMY 25
7/10 80/59/70/-2/..../.../..               18 W   RMY N/A TSTM
7/11 84/61/73/+1/0.00/.../..               21 NW  RMY 19
 
7/12 low since midnight is 67F; normal low is now 63F

DAILY RECORDS FOR JULY 2015
 
7/10- NEW RECORD DAILY PRECIPITATION PENDING OF X.XX in 2015
surpasses previous record of 1.68 in. in 1933

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR JULY 12
HIGH 97F IN 1943
LOW 48F IN 1945
PRECIP 1.43 INS IN 1975
WIND 48e MPH SSW IN 1944
 
RECORDS FOR JULY 13
HIGH 95F IN 1894
LOW 52F IN 1888, 1895, 1939, 1973
PRECIP 3.54 INS IN 1996
WIND 55 MPH SE IN 1996
 
TODAY'S REPORT PREPARED BY: Robert Millette