BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, SEPTEMBER 29, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME FAIR WEATHER DAY WITH PASSING CLOUDS, HIGH PRESSURE, AND WARM TEMPERATURES.... Besides a few passing clouds, weather has been beautiful and sunny today. Visibility remains excellent at about 80 miles, and has been excellent since 7 this morning. The high temperature so far is 75F, which is 8 degrees above the normal maximum temperature of 67F, and the low since midnight is 64F, which is 15 degrees above our normal minimum temperature of 49F. Today's Observations: 7 A.M. Weather: Clear, few stratocumulus and cirrus in all directions Temperature: 65F; Dew Point: 54F; Wind: NNW at 10 kts Sea-level pressure: 30.20 ins. Hg, rising, then more slowly Visibility: 80 miles 6-hr Max temp: 66F 6-hr Min temp: 64F 24-hr Precip: 0.00 ins. BHO SA 1155 CLR 80 228/65/54/3310/020/ FEW SC ALQDS FEW CI ALQDS/ 8/402 51036 10066 20064 10 A.M. Weather: Broken stratocumulus, broken cirrus Temperature: 70F; Dew Point: 54F; Wind: N at 8 kts Sea-level pressure: 30.25 ins. Hg, rising, then more slowly Visibility: 80 miles 3-hr Precip: 0.00 ins. BHO SA 1455 E40 BKN E250 BKN 80 245/70/54/3508/025/ 8/401 51017 1 P.M. Weather: Scattered cumulus, scattered cirrus Temperature: 74F; Dew Point: 52F; Wind: NNW at 7 kts   Sea-level pressure: 30.24 ins. Hg, falling, then more slowly Visibility: 80 miles 6-hr Max temp: 75F 6-hr Min temp: 65F 6-hr Precip: 0.00 ins. BHO SA 1755 40 SCT 250 SCT 80 240/74/52/3407/024/ 8/101 58005 10075 20065 SUMMARY FOR SATURDAY, SEPTEMBER 28, 2019 TEMPERATURE (DEGREES F) MAX.....78   NORMAL.....67 MIN.....55   NORMAL.....50 MEAN....67   NORMAL.....58 DEPARTURE FROM 30-YEAR NORMAL......................+9 TOTAL DEPARTURE FOR THE MONTH.....................+28 [+0.8 DEGREES/DAY] HEATING DEGREE DAYS (SEASON AUG TO JUL) TOTAL HEATING UNITS FOR YESTERDAY...............0   DEPARTURE.........-7 TOTAL HEATING UNITS FOR THE MONTH..............71   DEPARTURE........-30 TOTAL HEATING UNITS FOR THE SEASON.............83   DEPARTURE........-43 TOTAL HEATING UNITS LAST SEASON TO DATE........76   DEPARTURE.........+7 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY...............2   DEPARTURE.........+1 TOTAL COOLING UNITS FOR THE MONTH..............58   DEPARTURE.........-1 TOTAL COOLING UNITS FOR THE SEASON............680   DEPARTURE........+84 TOTAL COOLING UNITS LAST SEASON TO DATE.......863   DEPARTURE.......-183 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................31 S   AT 12:18 P.M.                    AERO.........................29 S   AT 12:40 P.M.                    ASOS.........................32 S   AT 12:18 P.M.                    DAVIS........................31 S   AT  2:07 P.M. RMY 30 FASTEST MILE FOR YESTERDAY......................23 S   AT 12:11 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................23 SSW AT  2:13 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................22 SSW AT  2:12 P.M. AVERAGE WIND SPEED AND DIRECTION................14.2 SSW                    ASOS.........................14.3                    DAVIS........................13.3 SSW [203 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.15                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........1.27  DEPARTURE......-2.49                          ASOS..............1.19 TOTAL PRECIPITATION FOR THE YEAR..........38.42  DEPARTURE......-0.37                          ASOS.............38.23 PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER 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/-3/0.00/703/89                21 ENE AERO 14 ENE RMY 18 9/02  75/57/66/-2/0.37/165/21                39 W   AERO 41 W   RMY 41 9/03  77/61/69/+2/0.00/643/82                18 S   AERO 16 S   RMY N/A 9/04  83/61/72/+5/0.00/375/48                30 SW  AERO 28 SW  RMY 30 9/05  68/54/61/-6/0.00/513/66                23 NW  AERO 17 NW  RMY N/A 9/06  65/56/61/-6/0.03/054/07                37 ENE AERO 36 ENE RMY 36 9/07  70/51/61/-5/0.27/325/42                37 N   AERO 37 N   RMY N/A 9/08  73/53/63/-3/0.00/631/82                25 W   AERO 21 W   RMY N/A 9/09  71/54/63/-3/0.00/537/70                17 SE  AERO 16 SE  RMY 16 9/10  73/57/65/0/0.00/207/27                 25 S   AERO 25 S   RMY N/A 9/11  83/63/73/+8/0.00/419/55                31 SW  AERO 32 SW  RMY N/A 9/12  70/52/61/-4/0.11/015/02                29 ENE AERO 28 ENE RMY 28 9/13  65/49/57/-7/0.00/741/98                29 ENE AERO 27 ENE RMY 27 9/14  69/49/59/-5/0.19/030/04                36 S   AERO 37 S   RMY 37 9/15  78/62/70/+6/0.00/600/80                24 W   AERO 23 W   RMY 22 9/16  72/54/63/0/0.00/673/90                 25 WNW AERO 23 WNW RMY 25 9/17  67/49/58/-5/0.00/611/82                23 NW  AERO 23 N   RMY N/A 9/18  61/49/55/-7/0.00/.../..                26 NE  AERO 25 NE  RMY 25 9/19  67/43/55/-7/0.00/.../..                17 NE  AERO 18 NE  RMY N/A 9/20  78/50/64/+2/0.00/.../..                21 W   AERO 18 W   RMY 20 9/21  83/60/72/+11/0.00/.../..               21 WNW AERO 18 WNW RMY N/A 9/22  85/62/74/+13/0.00/.../..               24 SW  AERO 23 SW  RMY 25 9/23  88/65/77/+17/0.00/.../..               29 SSW AERO 28 SSW RMY 29 9/24  76/56/66/+6/0.04/.../..                26 W   AERO 26 W   RMY 27   9/25  73/50/62/+2/0.00/.../..                22 W   AERO 21 W   RMY 21 9/26  79/55/67/+8/0.25/.../..                38 SW  AERO 37 SW  RMY 39 9/27  72/50/61/+2/0.00/.../..                23 S   AERO 23 S   RMY 22 9/28  78/55/67/+9/0.00/.../..                31 S   AERO 29 S   RMY 30 9/29  The low since midnight is 64F, normal daily minimum is 50F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR SEPTEMBER 29 HIGH 85F IN 1952 LOW 28F IN 1914 (SEPTEMBER MINIMUM RECORD) PRECIP 2.61 INCHES IN 1907 PEAK GUST 62 MPH S IN 2005 RECORDS FOR SEPTEMBER 30 HIGH 84F IN 1986 LOW 31F IN 1992 PRECIP 2.44 INCHES IN 2015 PEAK GUST 58 MPH SSE IN 1999 TODAY'S REPORT PREPARED BY: Samantha Richard