BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JULY 10, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME
 
ANOTHER COOL, CLOUDY, DAMP DAY
RECORD LOW MAX MISSED BY TWO DEGREES SATURDAY
 
For a third day, fog, drizzle, and cool temperatures have been the
story as a weak, elongated low pressure slogs its way through New England.
Some heavier showers last night totaled 0.12 inches of rain by the 7:00
observation this morning.  Yesterday averaged 11 degrees below normal, with
the high of 64F only two degrees above the record low maximum temperature for
the date of 62F.  The recent cool spell now has July running slightly below
normal for temperatures, but also still a little below normal for rainfall. 
 
So far this afternoon, the temperature has risen to 65F, well below the
average high of 81F.  Drizzle had mostly subsided by late morning, and the
cloud ceiling and visibility have slowly risen.  The sky has brightened at
times, but so far, no sunshine has been observed.
 
Today's Observations:
 
7 A.M.
Weather: Sky obscured by dense fog, light drizzle
Temperature: 59F; Dew Point: 59F; Wind: estimated NE at 5 kts,
Wind: Light
Sea-level pressure: 29.87 ins. Hg, rising then steady
Visibility: 1/8 mile
6-hr Max temp: 59F
6-hr Min temp: 58F
24-hr precip: 0.12 in.
BHO SA 1155 W3 X 1/8L-F 115/59/59/E0405/987/ WND LGT/ 8//// 51007
ASOS 60002 70011 MANUAL 70012 10059 20058 
 
10 A.M.
Weather: Broken stratocumulus, overcast stratocumulus (higher layer),
thin fog
Temperature: 62F; Dew Point: 59F; Wind: estimated NE at 5 kts,
Wind: Light
Sea-level pressure: 29.88 ins. Hg, steady then rising slightly
Visibility: 10 miles, except 25 miles SW-W, 45 miles NE-ENE 
3-hr precip: Trace
BHO SA 1455 E8 BKN 15 OVC 10 118/62/59/E0405/988/ THN FG
VSBY SW-W 25 NE-ENE 45 WND LGT/ 8/5// 53003 MANUAL 6000/
 
1 P.M.
Weather: Overcast stratocumulus, thin fog NNW-N
Temperature: 65F; Dew Point: 60F; Wind: estimated NE at 5 kts
Sea-level pressure: 29.88 ins. Hg, rising then falling 
Visibility: 30 miles, except 10 miles NNW-N, 50 miles NE-E
6-hr Max temp: 65F
6-hr Min temp: 59F
6-hr precip: Trace
BHO SA 1755 E10 OVC 30 120/65/60/E0505/988/ THN FG NNW-N VSBY
NNW-N 10 NE-E 50 WND L/V/ 8/5// 50002 MANUAL 6000/ 10065 20059

SUMMARY FOR SATURDAY, JULY 9, 2016
 
TEMPERATURE (DEGREES F)
MAX.....64   NORMAL.....81
MIN.....57   NORMAL.....63
MEAN....61   NORMAL.....72
 
DEPARTURE FROM 30-YEAR NORMAL........................-11
TOTAL DEPARTURE FOR THE MONTH.........................-4 [-0.2 DEGREES/DAY]
 
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............0   DEPARTURE..........-7
TOTAL COOLING UNITS FOR THE MONTH..............56   DEPARTURE..........-1
TOTAL COOLING UNITS FOR THE SEASON............213   DEPARTURE.........+27
TOTAL COOLING UNITS LAST SEASON TO DATE.......196   DIFFERENCE........+17  
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY...................20  NE   AT  2:12 A.M.
                   ASOS........................20  ENE  AT  2:12 A.M.     
                   DAVIS.......................18  NNE  AT  2:40 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY.....................12  ENE  AT  6:42 P.M.* 
MAXIMUM 2-MINUTE ASOS AVERAGE..................14  ENE  AT  6:42 P.M.      
MAXIMUM 2-MINUTE DAVIS AVERAGE.................13  E    AT  2:07 P.M.     
AVERAGE WIND SPEED AND DIRECTION..............7.8  E
                   ASOS.......................8.1
                   DAVIS......................7.0  ENE [069 Deg.]
*Last of several occurrences
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.12  DEPARTURE......+0.01
                         ASOS..............0.11
TOTAL PRECIPITATION FOR THE MONTH..........0.63  DEPARTURE......-0.36
                         ASOS..............0.59
TOTAL PRECIPITATION FOR THE YEAR..........22.32  DEPARTURE......-5.64
                         ASOS.............22.71

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/+6/0.20/520/57                 32 S   AERO 35 S   RMY 34 TSTM
7/2  76/61/69/-1/0.00/811/91                 31 W   AERO 34 W   RMY 32
7/3  83/57/70/-1/0.00/766/84                 23 W   AERO 23 W   RMY 23
7/4  87/61/74/+3/0.00/847/93                 28 SSW AERO 28 SSW RMY 28
7/5  80/65/73/+2/0.29/309/34                 16 S   AERO 16 S   RMY N/A
7/6  92/68/80/+9/0.00/864/95                 22 WSW AERO 24 WSW RMY 22
7/7  77/61/69/-2/..../.../..                 21 NE  AERO 20 ENE RMY N/A
7/8  67/58/63/-9/0.02/000/00                 25 NE  AERO 25 NE  RMY 26
7/9  64/57/61/-11/..../000/00                20 NE  AERO 18 NE  RMY 17
 
7/10 low temp since midnight is 58F; normal low is now 63F
 
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 10
HIGH 99F IN 1911
LOW 46F IN 1890
PRECIP 1.95 INS IN 2015
WIND 75 MPH W IN 1985
 
RECORDS FOR JULY 11
HIGH 98F IN 1911
LOW 49F IN 1890
PRECIP 1.87 INS IN 1959
WIND 53 MPH NW IN 1988
 
TODAY'S REPORT PREPARED BY: Jonathan O'Brien