BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, AUGUST 31, 2017   ALL TIMES ARE IN EASTERN STANDARD TIME TEMPS FALL, AFTERNOON SKIES MOSTLY CLOUDY DUE TO COLD FRONT Cloud cover became broken with stratocumulus in the early afternoon due to a passing cold front.  Temperatures rose to 79F before falling to 73F at 1:00PM EST as the front entered the region.  Winds out of the west and northwest began gusting over 20 MPH, and a peak gust of 23 MPH was recorded before noon.  Distant haze was present during each observation which limited visibility to 40 miles.   Today's Observations: 7 A.M. Weather: Few altostratus WSW-N Temperature: 59F; Dew Point: 51F; Wind: W at 10 kts Sea-level pressure: 29.87 ins. Hg, rising unsteadily Visibility: 40 miles, distant fog in all directions 6-hr Max temp: 59F 6-hr Min temp: 55F 24-hr Precip: Trace BHO SA 1155 CLR 40 114/59/51/2610/987/ FEW AS WSW-N DSNT FG ALQDS/ 8/010 52007 10059 20055 10 A.M. Weather: Few altocumulus in all directions Temperature: 75F; Dew Point: 54F; Wind: WNW at 8 kts Sea-level pressure: 29.85 ins. Hg, rising then falling Visibility: 40 miles, distant haze in all directions BHO SA 1455 CLR 40 109/75/54/3008/985/ FEW AC ALQDS DSNT HZ ALQDS/ 8/030 58005 1 P.M.  Weather: Broken stratocumulus, broken altocumulus Temperature: 73F; Dew Point: 56F; Wind: WNW at 12G17 kts Sea-level pressure: 29.84 ins. Hg, falling then rising Visibility: 40 miles, distant haze in all directions 6-hr Max temp: 79F  6-hr Min temp: 59F BHO SA 1755 E49 BKN 130 BKN 40 105/73/56/2912G17/984/ DSNT HZ ALQDS/ 8/530 55004 10079 20059 SUMMARY FOR WEDNESDAY, AUGUST 30, 2017   TEMPERATURE (DEGREES F) MAX.....72   NORMAL.....77 MIN.....57   NORMAL.....60 MEAN....65   NORMAL.....68 DEPARTURE FROM 30-YEAR NORMAL.........................-3 TOTAL DEPARTURE FOR THE MONTH........................+12 [+0.2 DEGREES/DAY] COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY...............0   DEPARTURE..........-4 TOTAL COOLING UNITS FOR THE MONTH.............184   DEPARTURE..........+2 TOTAL COOLING UNITS FOR THE SEASON............605   DEPARTURE.........+72 TOTAL COOLING UNITS LAST SEASON TO DATE.......784   DEPARTURE........-179 PEAK GUST AND AVERAGE WIND SPEED (MPH)  PEAK WIND GUST FOR YESTERDAY...................22 NNE AT 10:58 A.M.                    AERO........................21 NNE AT 11:02 A.M.                    ASOS........................23 NE  AT 11:42 A.M.                    DAVIS.......................21 N   AT 10:58 A.M. RMY 23 FASTEST MILE FOR YESTERDAY.....................16 NNE AT 11:42 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE..................17 NE  AT 11:43 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.................16 NNE AT 11:42 A.M. AVERAGE WIND SPEED AND DIRECTION..............9.0 NNE                    ASOS.......................9.3                    DAVIS......................5.3 NNE [034 DEG.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M...Trace  DEPARTURE......-0.11                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........1.60  DEPARTURE......-2.32                          ASOS..............1.58 TOTAL PRECIPITATION FOR THE YEAR..........36.36  DEPARTURE......+1.45                          ASOS...............N/A *** *** ASOS annual total not available due to erroneous readings PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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 8/1  87/65/76/+4/0.00/762/88               16 ESE*AERO 16 NNW RMY 16 8/2  86/65/76/+4/1.09/372/43               32 W   AERO 36 W   RMY 34 TSTM 8/3  83/65/74/+2/0.00/552/64               22 S   AERO 23 S   RMY 24 8/4  84/66/75/+3/0.00/697/81               26 S   AERO 30 S   RMY 29 8/5  75/63/69/-3/0.10/060/07               23 NW  AERO 28 NW  RMY 29 8/6  76/57/67/-5/0.00/795/93               30 NW  AERO 32 NW  RMY 31 8/7  76/60/68/-4/0.01/597/70               28 SSW AERO 28 SSW RMY 29 8/8  74/60/67/-5/0.02/000/00               17 S   AERO 16 SSE RMY 16 8/9  83/58/71/-1/0.00/831/98               18 S   AERO 18 S   RMY 19  8/10 86/63/75/+4/T/643/76                  20 S   AERO 18 S   RMY 20 8/11 82/63/73/+2/0.00/666/79               17 S   AERO 16 S   RMY 17 8/12 75/57/66/-5/0.17/294/35               22 SSW*AERO 22 SSW RMY 23 8/13 84/67/76/+5/0.00/796/95               26 WNW AERO 24 WNW RMY 26 8/14 82/67/75/+4/0.00/359/43               14 SSW*AERO 14 S   RMY 15 8/15 79/64/72/+1/T/058/07                  21 S   AERO 21 S   RMY 23 8/16 83/64/74/+3/0.00/698/84               23 NW* AERO 23 NW  RMY 25 8/17 81/58/70/-1/0.00/.../..               15 SSW AERO 14 SSW RMY N/A  8/18 79/63/71/0/0.01/.../..                33 S   AERO 35 S   RMY 35 8/19 89/65/77/+7/0.00/.../..               23 WSW AERO 23 WSW RMY 25  8/20 84/66/75/+5/0.00/.../..               23 NW  AERO 25 NW  RMY 27 8/21 85/63/74/+5/0.00/.../..               18 SW  AERO 20 SW  RMY 20 8/22 88/68/78/+8/0.00/.../..               31 S   AERO 35 S   RMY 34   8/23 83/64/74/+4/0.04/.../..               24 WNW*AERO 25 WNW RMY 27 8/24 80/59/70/0/0.00/.../..                18 WNW*AERO 17 WNW RMY 21 8/25 75/57/66/-3/T/.../..                  21 NW  AERO 21 NW  RMY 23 8/26 75/55/65/-4/0.00/.../..               16 WNW AERO 16 SSE RMY 17 8/27 75/55/65/-4/0.00/.../..               17 ENE*AERO 16 ENE*RMY 18 8/28 74/56/65/-4/0.00/.../..               17 ENE AERO 16 ENE*RMY 18 8/29 68/57/63/-6/..../.../..               18 ENE AERO 16 ENE RMY N/A 8/30 72/57/65/-3/..../.../..               22 NNE AERO 21 NNE RMY 23 8/31 Low temp since midnight is 55F; normal low is now 60F DAILY RECORDS FOR AUGUST None so far. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):       RECORDS FOR AUGUST 31 HIGH 94F IN 1953 LOW 42F IN 1976 PRECIP 2.46 INCHES IN 1954 PEAK GUST 125 MPH SE IN 1954 [CAROL - RECORD FOR MONTH] RECORDS FOR SEPTEMBER 1 HIGH 93F IN 1969, 2010 LOW 47F IN 1975 PRECIP 2.32 INCHES IN 2013 PEAK GUST 59e MPH S IN 1945, SSW IN 1965 TODAY'S REPORT PREPARED BY: Cecilia Borries-Strigle