BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, SEPTEMBER 26, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME MORNING FOG LEADS TO INCREASING CLOUDS AND WIND IN THE AFTERNOON.... Today began foggy with a visibility of a 1/16th mile, increasing to a max of 60 miles at the 10 A.M. observation. Skies became cloudier as the day went on, being almost overcast at 1 P.M. Dew points have held in the mid to upper 50s, with an afternoon humidity of 40%. A sea breeze has been coming in from the southeast, becoming more significant in the afternoon. The peak gust so far today is 40 mph, observed around 3 P.M.   Very little has been measured for rainfall this month, with a monthly total of only 1.02 inches. That is 2.30 inches below normal at this point in the month. The high so far today has been 79F, which is 11 degrees above the normal high of 68F. The low since midnight was 57F, which is 6 degrees above our normal low of 51F. Today's Observations: 7 A.M. Weather: Fog Temperature: 59F; Dew Point: 59F; Wind: S at 8 kts Sea-level pressure: 29.85 ins. Hg, rising then falling Visibility: 1/16th mile, fog 6-hr Max temp: 59F 6-hr Min temp: 57F 24-hr Precip: 0.00 ins. BHO SA 1155 X W2 1/16F 108/59/59/1808/985/ 8//// 58000 10059 20057 10 A.M. Weather: Scattered cirrostratus, few cumulus in all directions Temperature: 73F; Dew Point: 58F; Wind: S at 8 kts Sea-level pressure: 29.84 ins. Hg, rising then falling Visibility: 60 miles, distant fog offshore 3-hr Precip: 0.00 ins. BHO SA 1455 250 SCT 60 104/73/58/1808/984/ FEW AC ALQDS DSNT FG OFFSHR/ 8/078 58004 1 P.M. Weather: Broken altocumulus Temperature: 78F; Dew Point: 53F; Wind: S at 15G25 kts, Peak wind: 30 MPH (26 kts) at 12:35 P.M. Sea-level pressure: 29.76 ins. Hg, falling, then more rapidly Visibility: 35 miles, hazy 6-hr Max temp: 79F 6-hr Min temp: 59F 6-hr Precip: 0.00 ins. BHO SA 1755 E180 BKN 35 078/78/53/1915G25/976/ HAZY PK WND 1926/35/ 8/070 56026 10079 20059 SUMMARY FOR WEDNESDAY, SEPTEMBER 25, 2019 TEMPERATURE (DEGREES F) MAX.....73   NORMAL.....68 MIN.....50   NORMAL.....51 MEAN....62   NORMAL.....60 DEPARTURE FROM 30-YEAR NORMAL.....................+2 TOTAL DEPARTURE FOR THE MONTH.....................+9 [+0.2 DEGREES/DAY] HEATING DEGREE DAYS (SEASON AUG TO JUL) TOTAL HEATING UNITS FOR YESTERDAY...............3   DEPARTURE.........-3 TOTAL HEATING UNITS FOR THE MONTH..............67   DEPARTURE........-13 TOTAL HEATING UNITS FOR THE SEASON.............79   DEPARTURE........-26 TOTAL HEATING UNITS LAST SEASON TO DATE........61   DEPARTURE........+18 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY...............0   DEPARTURE.........-1 TOTAL COOLING UNITS FOR THE MONTH..............54   DEPARTURE.........-2 TOTAL COOLING UNITS FOR THE SEASON............676   DEPARTURE........+83 TOTAL COOLING UNITS LAST SEASON TO DATE.......855   DEPARTURE.......-179 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................22 W   AT 11:52 A.M.                    AERO.........................21 W   AT 11:58 A.M.                    ASOS.........................21 NW  AT 11:34 A.M.                    DAVIS........................21 W   AT 11:54 A.M. RMY 21 FASTEST MILE FOR YESTERDAY......................14 W   AT 11:42 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................15 NW  AT 11:44 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................16 WNW AT 11:39 A.M. AVERAGE WIND SPEED AND DIRECTION.................8.5 WNW                    ASOS..........................9.0                    DAVIS.........................9.0 W [279 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..........1.02  DEPARTURE......-2.30                          ASOS..............0.98 TOTAL PRECIPITATION FOR THE YEAR..........38.17  DEPARTURE......-0.18                          ASOS.............38.02 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  The low since midnight is 57F, normal daily minimum is 51F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR SEPTEMBER 26 HIGH 91F IN 2007 LOW 36F IN 1905,1922,1978 PRECIP 3.84 INCHES IN 1888 PEAK GUST 54e MPH S IN 1977 RECORDS FOR SEPTEMBER 27 HIGH 86F IN 2017 LOW 32F IN 1947 PRECIP 2.26 INCHES IN 1962 PEAK GUST 100 MPH SSE IN 1985 (HURRICANE GLORIA) TODAY'S REPORT PREPARED BY: Benjamin Turner and Greg White