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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JUNE 30, 2017  
ALL TIMES ARE IN EASTERN STANDARD TIME

HUMID BUT SEASONABLE TEMPERATURES CONTINUE

Humid air continued through the morning with the winds coming from
the south/ southwest. Temperatures have been close to normal with a
high yesterday of 78F and today of 82F by 1:00 P.M. The normal
temperature being 79F. A short rainstorm left a trace of precipitation 
just before the 10:00 AM observation. Humidity started to fall after 
it moved through and made for a drier feeling afternoon. As southerly 
winds continues a distant haze remained in the region and limited 
visibility to 20 miles during the last observation.

Today's Observations:

7 A.M.
Weather: Broken stratocumulus, broken altocumulus,
broken cirrostratus
Temperature: 70F; Dew Point: 61F; Wind: SSW at 11 kts
Sea-level pressure: 30.00 ins. Hg, rising, then more slowly
Visibility: 20 miles, distant haze in all directions
6-hr Max temp: 70F
6-hr Min temp: 65F
24-hr precip: 0.00 in.
BHO SA 1155 E60 BKN E80 BKN 250 BKN 20 158/70/61/2011/000/
DSNT HZ ALQDS/ 8/486 50003 10070 20065

10 A.M.
Weather: Few cumulus N-NNE, broken altocumulus, broken altostratus
Temperature: 72F; Dew Point: 64F; Wind: SSW at 12 kts
Sea-level pressure: 30.01 ins. Hg, rising, then more slowly
Visibility: 40 miles, distant haze in all directions
BHO SA 1455 E110 BKN 160 OVC 40 161/72/64/2012/001/ FEW CU N-NNE DSNT
HZ ALQDS/ 8/118 MANUAL 600// ASOS 60001 53003

1 P.M.
Weather: Few cumulus all directions, broken altocumulus, broken
cirrostratus
Temperature: 80F; Dew Point: 68F; Wind: S at 10G18 kts
Sea-level pressure: 29.97 ins. Hg,falling unsteadily
Visibility: 20 miles, distant haze in all directions
6-hr Max temp: 82F
6-hr Min temp: 69F
3-hr precip: Trace
BHO SA 1755 E80 BKN E200 BKN 20 148/80/68/1910G18/997/ FEW CU ALQDS
DSNT HZ ALQDS/ 8/178 58013 10082 20069

SUMMARY FOR THURSDAY, JUNE 29, 2017

TEMPERATURE (DEGREES F)
MAX.....78   NORMAL.....79
MIN.....60   NORMAL.....61
MEAN....69   NORMAL.....70

DEPARTURE FROM 30-YEAR NORMAL.........................-1
TOTAL DEPARTURE FOR THE MONTH........................+45 [+1.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............0   DEPARTURE..........+1
TOTAL HEATING UNITS FOR THE MONTH..............63   DEPARTURE.........-10
TOTAL HEATING UNITS FOR THE SEASON...........5752   DEPARTURE........-650
TOTAL HEATING UNITS LAST SEASON TO DATE......5282   DIFFERENCE.......+443

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............4   DEPARTURE..........-1
TOTAL COOLING UNITS FOR THE MONTH.............136   DEPARTURE.........+37
TOTAL COOLING UNITS FOR THE SEASON............192   DEPARTURE.........+69
TOTAL COOLING UNITS LAST SEASON TO DATE.......147   DEPARTURE.........+45

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY...................30 SSW AT 10:04 P.M.
                   AERO........................30 SSW AT 10:00 P.M.
                   ASOS........................32 SSW AT 10:05 P.M.
                   DAVIS.......................34 SSW AT  9:50 P.M. RMY 32
FASTEST MILE FOR YESTERDAY.....................21 SSW AT 10:00 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE..................23 SSW AT  9:52 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE.................23 SSW AT  9:47 P.M.
AVERAGE WIND SPEED AND DIRECTION.............13.6 SSW
                   ASOS.........................M
                   DAVIS.....................12.1 SSW [211 DEG.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.10
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........5.92  DEPARTURE......+1.72
                         ASOS..............5.98
TOTAL PRECIPITATION FOR THE YEAR..........31.26  DEPARTURE......+4.40
                         ASOS...............N/A ***
*** ASOS annual total not available due to erroneous readings


PRELIMINARY CLIMATE SUMMARY FOR JUNE 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
M:    Missing data

6/1  78/55/67/+5/0.06/706/78               39 NW  AERO 39 NW  RMY 41
6/2  70/50/60/-2/T/652/72                  32 WNW AERO 35 WNW RMY 34
6/3  66/47/57/-5/0.01/472/52               23 NW  AERO 25 NW  RMY 24
6/4  71/49/60/-3/0.28/490/54               21 SSE*AERO 21 SW  RMY N/A
6/5  55/49/52/-11/1.20/000/00              32 NE  AERO 35 NE  RMY N/A
6/6  49/45/47/-16/1.36/000/00              40 ENE AERO 43 ENE RMY 43
6/7  65/47/56/-8/0.05/519/57               21 NNE AERO 18 NE* RMY 20
6/8  76/52/64/0/0.00/602/66                21 SSE AERO 21 SSE RMY 18
6/9  78/53/66/+2/0.16/438/48               48 N   AERO 54 N   RMY 52 TSTM
6/10 83/59/71/+6/0.00/722/79               25 SSW AERO 28 SSW RMY 27  
6/11 89/64/77/+12/0.00/704/77              29 SW  AERO 32 WSW RMY 30
6/12 94/69/82/+17/0.00/851/93              28 W   AERO 29 W   RMY 28
6/13 92/67/80/+15/0.03/796/87              25 W   AERO 28 WNW RMY 28
6/14 78/56/67/+1/0.02/889/97               20 S   AERO 20 S   RMY 20
6/15 75/54/65/-1/0.00/870/95               25 SSW AERO 29 S   RMY 30
6/16 70/56/63/-3/2.14/073/08               28 S   AERO 29 S   RMY N/A
6/17 70/58/64/-3/0.01/000/00               18 S   AERO 18 S   RMY N/A
6/18 82/65/74/+7/T/394/43                  33 SSW*AERO 35 SSW RMY 37
6/19 82/67/75/+8/0.05/312/34               40 S   AERO 43 S   RMY 43
6/20 84/66/75/+7/0.25/651/71               38 SW  AERO 44 SW  RMY 40
6/21 83/64/74/+6/0.00/734/80               29 W   AERO 30 W   RMY 30
6/22 83/59/71/+3/0.00/779/85               23 W   AERO 22 W   RMY 21
6/23 88/66/77/+9/0.00/.../..               33 S   AERO 36 S   RMY 36 TSTM
6/24 84/68/76/+7/0.19/.../..               28 WNW AERO 31 WNW RMY 32
6/25 83/61/72/+3/T/.../..                  29 WNW AERO 35 WNW RMY 34
6/26 79/57/68/-1/0.00/.../..               24 W   AERO 24 W   RMY 23
6/27 74/55/65/-4/0.11/.../..               43 S   AERO 45 S   RMY 45
6/28 76/52/64/-6/0.00/.../..               28 W   AERO 28 W   RMY 28
6/29 78/60/69/-1/0.00/.../..               30 SSW AERO 30 SSW RMY 32

6/30 Low temp since midnight is 65F; normal low is now 61F


DAILY RECORDS FOR JUNE

6/12/17: DAILY RECORD MAXIMUM TEMPERATURE OF 94F,
         BREAKS PREVIOUS RECORD OF 92F SET IN 1973

6/12/17: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 69F,
         TIES PREVIOUS RECORD SET IN 1942

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):      

RECORDS FOR JUNE 30
HIGH 94F IN 1964
LOW 47F IN 191 9
PRECIP 3.04 INS IN 1921
PEAK GUST 51 MPH WNW IN 1957

RECORDS FOR JULY 1
HIGH 98F IN 1964
LOW 44F IN 1988 [RECORD FOR MONTH]
PRECIP 4.46 INS IN 1915 [RECORD FOR MONTH]
PEAK GUST 52 MPH WNW IN 1974

TODAY'S REPORT PREPARED BY: Kaitlin Geagan