BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, SEPTEMBER 9, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME A COOL, FAIR WEATHER DAY WITH CONDITIONS BECOMING MOSTLY CLOUDY IN THE AFTERNOON.... Visibility has stayed at a nice 80 miles for the duration of the day today. Dew points have remained comfortable in the low to mid-50s. Winds have been on the lighter side at around 8 MPH and direction has been generally NE. Observed increasing cloud cover since this morning with mostly cloudy skies being seen in the afternoon. Cooler than normal temperatures today are due to increasing clouds and a light sea breeze. The high so far today is 71F, 3 degrees below the daily normal maximum of 74F. The low so far today is 54F, 3 degrees below the daily normal minimum of 57F. PRELIMINARY STATS FOR AUGUST 2019 TEMPERATURE, Deg. F Avg. Max. 80.4 [+1.2] Avg. Min. 62.1 [+0.3] Mean      71.5 [+1.0] 24-hour corrected mean: 70.5 Max. for month: 92F on the 19th Min. for month: 51F on the 26th COOLING DEGREE DAYS Total cooling units:   211 [+22] Total for the season:  619 [+82] Total for last season: 753 PRECIPITATION, Inches Total: 1.83 [-2.21] Greatest in 24 hrs: N/A WIND, mph Avg. uncorrected wind speed: 9.1 mph Avg. corrected wind speed:   9.8 mph Prevailing wind direction: N/A Peak gust and direction: N/A   SUNSHINE: Campbell-Stokes card minutes: N/A Astronomical total minutes:   N/A Today's Observations: 7 A.M. Weather: Scattered stratocumulus   Temperature: 59F; Dew Point: 50F; Wind: NNE at 7 kts Sea-level pressure: 30.27 ins. Hg, rising, then more slowly Visibility: 75 miles 6-hr Max temp: 59F 6-hr Min temp: 54F 24-hr Precip: 0.00 ins. BHO SA 1155 60 SCT 75 251/59/50/0207/027/ 8/400 51018 10059 20054 10 A.M. Weather: Scattered stratocumulus, scattered cirrocumulus Temperature: 67F; Dew Point: 52F; Wind: NNE at 7 kts   Sea-level pressure: 30.31 ins. Hg, rising, then more slowly Visibility: 80 miles 3-hr Precip: 0.00 in. BHO SA 1455 50 SCT 250 80 265/67/52/0307/031/ 8/809 51014 1 P.M. Weather: Broken stratocumulus, broken altocumulus Temperature: 68F; Dew Point: 52F; Wind: ENE at 7 kts Sea-level pressure: 30.29 ins. Hg, falling unsteadily Visibility: 80 miles 6-hr Max temp: 71F 6-hr Min temp: 59F BHO SA 1755 E60 BKN 180 BKN 80 257/68/52/0607/029/ 8/850 57008 10071 20059 SUMMARY FOR SUNDAY, SEPTEMBER 8, 2019 TEMPERATURE (DEGREES F) MAX.....73   NORMAL.....74 MIN.....53   NORMAL.....57 MEAN....63   NORMAL.....66 DEPARTURE FROM 30-YEAR NORMAL......................-3 TOTAL DEPARTURE FOR THE MONTH.....................-18 [-2.5 DEGREES/DAY] COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY...............0   DEPARTURE.........-3 TOTAL COOLING UNITS FOR THE MONTH..............12   DEPARTURE........-15 TOTAL COOLING UNITS FOR THE SEASON............631   DEPARTURE........+67 TOTAL COOLING UNITS LAST SEASON TO DATE.......822   DEPARTURE.......-191 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................25 W   AT  2:43 A.M.                    AERO.........................21 W   AT  5:21 A.M.                    ASOS.........................23 W   AT  2:46 A.M.                    DAVIS........................26 WNW AT  2:45 A.M. RMY N/A FASTEST MILE FOR YESTERDAY......................18 W   AT  5:20 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................17 W   AT  3:02 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................17 W   AT  3:02 A.M. AVERAGE WIND SPEED AND DIRECTION..............10.3 WNW                    ASOS........................9.7                    DAVIS......................10.8 WNW [291 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.12                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........0.67  DEPARTURE......-0.29                          ASOS..............0.67 TOTAL PRECIPITATION FOR THE YEAR..........37.82  DEPARTURE......+1.83                          ASOS.............37.70 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 8/01  84/66/75/+3/0.00/755/87               18 NNW AERO 20 NW  RMY 17 8/02  83/61/72/0/0.00/804/93                18 WSW AERO 18 WSW RMY 18 8/03  84/66/75/+3/0.00/302/35               25 SW  AERO 26 SW  RMY 25 8/04  83/66/75/+3/0.00/732/85               21 NE  AERO 23 SW  RMY 25 8/05  81/58/70/-2/0.00/842/98               20 S   AERO 18 S   RMY 19 8/06  79/63/71/-1/0.00/282/33               15 S   AERO 14 S   RMY 17 8/07  82/66/74/+2/0.34/367/43               32 SSW AERO 35 SSW RMY 35 8/08  84/67/76/+4/0.44/588/69               30 SW  AERO 24 WNW RMY 29 8/09  82/63/73/+1/0.00/815/96               28 NW  AERO 25 NW  RMY 26 8/10  78/59/69/-2/0.00/720/85               32 NW  AERO 28 NW  RMY 28 8/11  78/55/67/-4/0.00/734/87               28 W   AERO 25 W   RMY 28 8/12  82/60/71/0/0.00/749/89                25 W   AERO 23 W   RMY 26 8/13  77/66/72/+1/0.02/059/07               25 W   AERO 24 WSW RMY 24 8/14  75/62/69/-2/T/452/54                  24 ENE AERO 22 ENE RMY 22 8/15  77/59/68/-3/0.02/568/68               17 ESE AERO 15 SSE RMY 16 8/16  78/61/70/-1/0.00/740/89               20 E   AERO 17 ESE RMY 18 8/17  78/67/73/+2/0.01/099/12               14 SE  AERO 15 SE  RMY 15 8/18  88/70/79/+8/0.00/529/64               18 SSW AERO 18 SSW RMY 21 8/19  92/69/81/+11/0.03/536/65              25 WSW AERO 23 WSW RMY 25 8/20  87/66/77/+7/0.00/797/97               18 W   AERO 14 WSW RMY N/A 8/21  85/68/77/+7/0.12/287/35               33 SW  AERO 32 SW  RMY 33 8/22  88/68/78/+8/0.00/522/64               25 W   AERO 21 W   RMY 26 8/23  78/60/69/-1/0.04/016/02               23 N   AERO 18 N   RMY 24 8/24  72/55/64/-6/0.00/803/99               25 ENE AERO 21 ENE RMY 22 8/25  66/56/61/-8/0.00/590/73               31 ENE AERO 25 ENE RMY 29 8/26  71/51/61/-8/0.00/717/89               25 NE  AERO 21 NE  RMY 25 8/27  77/54/66/-3/0.00/530/66               18 SSW AERO 18 SSW RMY 17 8/28  78/59/69/0/0.66/184/23                21 SSE AERO 18 SSE RMY 20 8/29  83/63/73/+4/0.15/614/77               25 WNW AERO 21 WNW RMY 26 8/30  84/59/72/+4/0.00/739/93               30 SW  AERO 30 SW  RMY 28 8/31  79/61/70/+2/0.00/602/76               21 W   AERO 18 W   RMY 20 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 9/01  73/56/65/-3/0.00/.../..                21 ENE AERO 14 ENE RMY 18 9/02  75/57/66/-2/0.37/.../..                39 W   AERO 41 W   RMY 41 9/03  77/61/69/+2/0.00/.../..                18 S   AERO 16 S   RMY N/A 9/04  83/61/72/+5/0.00/.../..                30 SW  AERO 28 SW  RMY 30 9/05  68/54/61/-6/0.00/.../..                23 NW  AERO 17 NW  RMY N/A 9/06  65/56/61/-6/..../.../..                37 ENE AERO 36 ENE RMY 36 9/07  70/51/61/-5/0.00/.../..                37 N   AERO 37 N   RMY N/A 9/08  73/53/63/-3/0.00/.../..                25 W   AERO 21 W   RMY N/A 9/09 Low temp since midnight is 54F; normal low is 57F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR SEPTEMBER 9 HIGH 92F IN 2015 LOW 41F IN 1938 PRECIP 1.97 INCHES IN 1969 PEAK GUST 52 MPH WNW IN 1969, NW IN 1978 RECORDS FOR SEPTEMBER 10 HIGH 90F IN 1931,1989 LOW 41F IN 1956 PRECIP 5.60 INCHES IN 1999 (DAILY RECORD FOR SEPTEMBER) PEAK GUST 48 MPH NW IN 1972 TODAY'S REPORT PREPARED BY: Benjamin Turner and Andrew Swanson