BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, JULY 6, 2017   ALL TIMES ARE IN EASTERN STANDARD TIME HIGH PRESSURE STILL IN CONTROL BEFORE PASSAGE OF WARM FRONT THIS EVENING Today has been another pleasant day at Great Blue Hill despite an approaching warm front set to bring scattered showers and an increase in humidity later this evening. Temps. had reached 81F by 1:00PM EST as dew points fell to 51F. Winds have been slightly higher and out of the south and south-southwest.  Cloud cover has also increased today ahead of the warm front with scattered cirrus and a few cumulus and altocumulus. PRELIMINARY STATS FOR JUNE 2017   TEMPERATURE, Deg. F Avg. Max. 77.2 [+2.2] Avg. Min. 57.8 [+0.7] Mean      67.5 [+1.4] 24-hour corrected mean: 67.0 Max. for month: 94F on  12th  Min. for month: 45F on  6th    HEATING DEGREE DAYS Total heating units: 63 [-10]  Total for the season: 5725 [-651]  Total for last season: 5282 COOLING DEGREE DAYS Total cooling units: 145 [+40] Total for the season: 201 [+72] Total for last season: 157 PRECIPITATION, Inches Total: 6.03 [+1.72] Greatest in 24 hrs: 2.19 in on 5th-6th  WIND, mph Avg. uncorrected wind speed: 11.7 Avg. corrected wind speed: 12.1 Prevailing wind direction: W at 15% Peak gust and direction: 48 N on 9th     SUNSHINE: Campbell-Stokes card minutes: 15,030 minutes of possible 26,376 or 57% Astronomical total minutes: 15,613 minutes of possible 27,417 or 57% Today's Observations: 7 A.M. Weather: Few cumulus S-W, scattered cirrus Temperature: 68F; Dew Point: 60F; Wind: S at 7 kts Sea-level pressure: 30.19 ins. Hg, falling then rising Visibility: 70 miles 6-hr Max temp: 68F 6-hr Min temp: 60F 24-hr precip: 0.00 in. BHO SA 1155 250 SCT 70 222/68/60/1707/019/ FEW CU S-W/ 8/101 50000 10068 20060 10 A.M. Weather: Few distant cumulus SSW, few altocumulus E-WNW, broken cirrus Temperature: 72F; Dew Point: 58F; Wind: S at 7 kts Sea-level pressure: 30.19 ins. Hg, falling unsteadily Visibility: 70 miles BHO SA 1455 E250 BKN 70 222/72/58/1807/019/ FEW DSNT CU SSW FEW AC E-WNW/ 8/161 57000 1 P.M.  Weather: Few cumulus SE-N, few altocumulus E-SW, scattered cirrus Temperature: 80F; Dew Point: 51F; Wind: SSW at 11 kts Sea-level pressure: 30.13 ins. Hg, falling, then more slowly Visibility: 70 miles 6-hr Max temp: 81F 6-hr Min temp: 67F BHO SA 1755 250 SCT 60 204/80/51/2111/013/ FEW CU SE-N FEW AC E-SW/ 8/131 56018 10081 20067 SUMMARY FOR WEDNESDAY, JULY 5, 2017   TEMPERATURE (DEGREES F) MAX.....82   NORMAL.....80 MIN.....62   NORMAL.....62 MEAN....72   NORMAL.....71 DEPARTURE FROM 30-YEAR NORMAL.........................+1 TOTAL DEPARTURE FOR THE MONTH........................+22 [+4.2 DEGREES/DAY] COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY...............7   DEPARTURE..........+1 TOTAL COOLING UNITS FOR THE MONTH..............50   DEPARTURE.........+19 TOTAL COOLING UNITS FOR THE SEASON............251   DEPARTURE.........+91 TOTAL COOLING UNITS LAST SEASON TO DATE.......194   DEPARTURE.........+57 PEAK GUST AND AVERAGE WIND SPEED (MPH)  PEAK WIND GUST FOR YESTERDAY...................20  S  AT 10:03 P.M.                    AERO........................20 ENE AT  2:38 P.M.                    ASOS........................21  E  AT  2:38 P.M.                    DAVIS.......................20  S  AT 10:03 P.M. RMY 20 FASTEST MILE FOR YESTERDAY.....................14  S  AT 10:47 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE..................15  S  AT 10:47 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.................13 ENE AT  2:39 P.M. AVERAGE WIND SPEED AND DIRECTION..............7.9 NE                    ASOS.......................8.3                    DAVIS......................6.4  E [102 DEG.] *last of multiple occurrences 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..........0.00  DEPARTURE......-0.54                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE YEAR..........31.37  DEPARTURE......+3.86                          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/+9/0.00/413/45               33 S   AERO 36 S   RMY 36 TSTM 6/24 84/68/76/+7/0.19/413/45               28 WNW AERO 31 WNW RMY 32 6/25 83/61/72/+3/T/688/75                  29 WNW AERO 35 WNW RMY 34 6/26 79/57/68/-1/0.00/843/92               24 W   AERO 24 W   RMY 23 6/27 74/55/65/-4/0.11/421/46               43 S   AERO 45 S   RMY 45 TSTM 6/28 76/52/64/-6/0.00/897/98               28 W   AERO 28 W   RMY 28 6/29 78/60/69/-1/0.00/055/06               30 SSW AERO 30 SSW RMY 32 6/30 82/65/74/+4/0.11/229/25               30 SSW AERO 32 SSW RMY 32 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 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 M:    Missing data 7/1  85/67/76/+6/T/.../..                  35 S   AERO 37 S   RMY 38 7/2  87/69/78/+8/T/.../..                  25 W*  AERO 28 W*  RMY 27 7/3  85/67/76/+5/0.00/.../..               28 W*  AERO 29 W   RMY 30 7/4  84/62/73/+2/0.00/.../..               17 W   AERO 17 W   RMY 18 7/5  82/62/72/+1/0.00/.../..               20 S   AERO 20 ENE RMY 20 7/6 Low temp since midnight is 60F; normal low is now 62F DAILY RECORDS FOR JULY None so far. 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: Cecilia Borries-Strigle