BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY WEDNESDAY, OCTOBER 2, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME MOSTLY CLOUDY AND SOME RAIN WITH THE APPROACHING FRONT.... Today we observed mostly cloudy skies with limited visibility due to haze and distant afternoon rainfall. The lowest visibility of ten miles was seen towards Boston, which encountered showers around the 1 P.M. observation. The highest visibility of 45 miles was seen at 10 A.M. The observatory encountered some light rain between 10 and 11 A.M., leaving only a trace in the gauge. Wind has shifted from SW-NE, with a max gust of 28 mph following the frontal passage. The high so far today is 75F, which is 10 degrees above the normal high of 65F. The low this morning was 68F, which is 20 degrees above the normal low of 48F. Today's Observations: 7 A.M. Weather: Scattered cumulus, broken altocumulus Temperature: 70F; Dew Point: 66F; Wind: W at 12 kts, gusting to 20 kts Sea-level pressure: 29.78 ins. Hg, rising steadily Visibility: 25 miles, hazy 6-hr Max temp: 70F 6-hr Min temp: 68F 24-hr Precip: 0.00 ins. BHO SA 1155 20 SCT E140 BKN 25 086/70/66/2612G20/978/ HAZY/ 8/870 53011 10070 20068 10 A.M. Weather: Broken stratocumulus and altostratus, light rain beginning at 9:55 A.M. Temperature: 72F; Dew Point: 67F; Wind: W at 10 kts, Wind: Light and variable Sea-level pressure: 29.79 ins. Hg, falling then rising Visibility: 45 miles, distant haze 3-hr Precip: Trace BHO SA 1455 E30 BKN 100 BKN 45 090/72/67/2604/979/ DSNT HZ ALQDS R-B55 WND L/V/ 8/820 600// 50004 1 P.M. Weather: Broken stratocumulus and altostratus, virga NW-NE Temperature: 73F; Dew Point: 66F; Wind: NE at 6 kts, Wind: Light   Sea-level pressure: 29.78 ins. Hg, rising then falling Visibility: 20 miles, except 10 miles NW-NE 6-hr Max temp: 75F 6-hr Min temp: 70F 6-hr Precip: Trace BHO SA 1755 E30 BKN 100 BKN 20 085/73/66/0506/978/ VIRGA NW-NE VSBY 10 NW-NE WND LGT/ 8/820 600// 55005 10075 20070   SUMMARY FOR TUESDAY, OCTOBER 1, 2019 TEMPERATURE (DEGREES F) MAX.....67   NORMAL.....66 MIN.....52   NORMAL.....49 MEAN....60   NORMAL.....57 DEPARTURE FROM 30-YEAR NORMAL......................+3 TOTAL DEPARTURE FOR THE MONTH......................+3 [+2.8 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............5   DEPARTURE.........-3 TOTAL HEATING UNITS FOR THE MONTH...............5   DEPARTURE.........-3 TOTAL HEATING UNITS FOR THE SEASON.............98   DEPARTURE........-53 TOTAL HEATING UNITS LAST SEASON TO DATE........93   DEPARTURE.........+5 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY...............0   DEPARTURE.........-1 TOTAL COOLING UNITS FOR THE MONTH...............0   DEPARTURE.........-1 TOTAL COOLING UNITS FOR THE SEASON............680   DEPARTURE........+83 TOTAL COOLING UNITS LAST SEASON TO DATE.......863   DEPARTURE.......-183 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................28 SW   AT 10:40 P.M.                    AERO.........................25 SSW  AT  7:22 P.M.                    ASOS.........................29 SW   AT 10:39 P.M.                    DAVIS........................26 SSW  AT  7:53 P.M. RMY 29 FASTEST MILE FOR YESTERDAY......................21 SW   AT 10:20 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................21 SW   AT  9:29 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................20 SSW  AT  7:48 P.M. AVERAGE WIND SPEED AND DIRECTION...............14.3 SSW                    ASOS........................14.3                    DAVIS.......................13.6 SSW [201 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.16                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........0.06  DEPARTURE......-0.10                          ASOS..............0.06 TOTAL PRECIPITATION FOR THE YEAR..........38.48  DEPARTURE......-0.77                          ASOS.............38.35 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  75/53/64/+6/0.00/.../..                24 NW  AERO 23 NW  RMY 23 9/30  62/49/56/-2/0.00/.../..                23 NNE AERO 16 NNE RMY N/A PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 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 10/01  67/52/60/+3/0.06/.../..               28 SW  AERO 25 SSW RMY 29 10/02  The low since midnight is 67F, normal daily minimum is 48F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR OCTOBER 2 HIGH 85F IN 1968 LOW 29F IN 1899 PRECIP 1.75 INCHES IN 1984 PEAK GUST 52e MPH S IN 1952, 52 NNW IN 1984 RECORDS FOR OCTOBER 3 HIGH 82F IN 1922 LOW 28F IN 1899 PRECIP 1.76 INCHES IN 1979 PEAK GUST 62 MPH WNW IN 1964 TODAY'S REPORT PREPARED BY: Benjamin Turner and Greg White