BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, NOVEMBER 15, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME CLEAR SKIES AND SEASONABLE TEMPERATURES ATOP GREAT BLUE HILL.... The 7 AM observation yielded clear skies that remained clear throughout the course of the day. Winds have been out of the southwest, bumping up our max temperature to 50F before our 1 PM observation. Despite somewhat limited visibility due to haze, today has been a splendid reprieve from the bitter cold and cloudy skies that have dominated this week. The high so far today is 50F, which equals the normal maximum of 50F. The low since midnight is 32F, 2 degrees below the normal minimum of 34F.   PRELIMINARY STATS FOR OCTOBER 2019 TEMPERATURE, Deg. F Avg. Max. 60.5 [+0.2] Avg. Min. 46.7 [+3.8] Mean      53.6 [+2.0] 24-hour corrected mean: 53.3 Max. for month: 77F on the 7th Min. for month: 35F on the 5th HEATING DEGREE DAYS Total heating units:   347  [-74] Total for the season:  440 [-123] Total for last season: 543 PRECIPITATION, Inches Total: 6.92 [+2.23] Greatest in 24 hrs: N/A WIND, mph Avg. uncorrected wind speed: 12.2 mph Avg. corrected wind speed:   12.6 mph Prevailing wind direction:   NE [13%] Peak gust and direction:     61 S,E on the 17th, 31st SUNSHINE: Campbell-Stokes card minutes: 7074 minutes of possible 19824 or 36% Astronomical total minutes: 7330 minutes of possible 20566 or 36% This was the second cloudiest October on record! BHO Lowest October Sunshine, hours (1886-2019): 1) 80.5 in 1913  [24%] 2) 117.9 in 2019  [36%] 3) 120.3 in 1896  [36%] 4) 121.6 in 1919  [37%] 5) 124.9 in 1888  [38%] Today's Observations: 7 A.M. Weather: Clear, Few Altostratus & Altocumulus Offshore, Hazy Temperature: 33F; Dew Point: 22F; Wind: WSW AT 10 kts, Sea-level pressure: 30.19 ins. Hg, rising then falling Visibility: 50 miles 6-hr Max temp: 37F 6-hr Min temp: 32F 24-hr Precip:  0.00 ins. 24-hr Snowfall: 0.0 ins. BHO SA 1155 CLR 50 225/33/22/2410/019/ FEW AS/AC OFFSHR HAZY/ 8/080 58002 10037 20032 10 A.M. Weather: Clear, Few Distant Cirrostratus and Few Distant Altostratus and Altocumulus Offshore, Hazy Temperature: 44F; Dew Point: 20F; Wind: SW at 11 kts, Sea-level pressure: 30.17 ins. Hg, rising then falling Visibility: 40 miles 3-hr Precip: 0.00 ins. BHO SA 1455 CLR 40 218/44/20/2311/017/ FEW AS/AC FEW CS OFFSHR HAZY/ 8/088 58009 1 P.M. Weather: Clear, Few Cirrostratus SE-SW Temperature: 49F; Dew Point: 23F; Wind: WSW at 11G19 kts Sea-level pressure: 30.08 ins. Hg, falling then falling more slowly Visibility: 50 miles 6-hr Max temp: 50F 6-hr Min temp: 33F 6-hr Precip: 0.00 ins. BHO SA 1755 CLR 50 187/49/23/24011G19/008/ FEW CS SE-SW HAZY/ 8/008 56031 10050 20033 SUMMARY FOR THURSDAY, NOVEMBER 14, 2019 TEMPERATURE (DEGREES F) MAX.....39   NORMAL.....51 MIN.....17   NORMAL.....34 MEAN....28   NORMAL.....42 DEPARTURE FROM 30-YEAR NORMAL...................-14 TOTAL DEPARTURE FOR THE MONTH...................-59 [-5.0 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............37  DEPARTURE........+14 TOTAL HEATING UNITS FOR THE MONTH..............362  DEPARTURE........+73 TOTAL HEATING UNITS FOR THE SEASON.............802  DEPARTURE........-50 TOTAL HEATING UNITS LAST SEASON TO DATE........813  DEPARTURE........-11 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................18 SW AT 10:49 P.M.                      AERO.........................17 SW AT 10:40 P.M                      ASOS.........................20 SW AT 10:52 P.M.                    DAVIS........................20 S  AT 12:55 P.M. RMY 20 FASTEST MILE FOR YESTERDAY......................15 SW AT 11:04 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................15 SW AT 10:52 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................15 SW AT  9:57 P.M. AVERAGE WIND SPEED AND DIRECTION................7.7 SSE                                      ASOS.........................8.4                      DAVIS........................8.1 SSW [198 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..........0.80  DEPARTURE......-1.40                          ASOS..............0.84 TOTAL PRECIPITATION FOR THE YEAR..........46.14  DEPARTURE......+0.16                          ASOS.............46.31 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.......-0.0 TOTAL SNOWFALL FOR THE MONTH................0.1  DEPARTURE.......-0.4 TOTAL SNOWFALL FOR THE SEASON...............0.1  DEPARTURE.......-0.7 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/+3/0.06/028/04               28 SW  AERO 25 SSW RMY 29 10/02  74/49/62/+5/0.42/021/03               30 ENE AERO 25 ENE RMY 28 10/03  51/46/49/-7/..../000/00               28 ENE AERO 26 ENE RMY N/A 10/04  59/40/50/-6/..../397/57               38 NNW AERO 38 NNW RMY 38 10/05  58/35/47/-9/0.00/687/99               21 N   AERO 18 SSW RMY N/A 10/06  65/44/55/0/0.00/263/38                36 SSW AERO 35 SSW RMY N/A 10/07  77/57/67/+12/0.12/316/46              47 SSW AERO 46 SSW RMY 49 10/08  60/52/56/+2/T/000/00                  22 NE  AERO 18 NW  RMY N/A 10/09  55/49/52/-2/..../000/00               43 NE  AERO 37 NE  RMY 44 10/10  54/47/51/-3/..../000/00               41 NE  AERO 37 NE  RMY 42 10/11  52/48/50/-3/..../000/00               41 NE  AERO 39 NE  RMY 41 10/12  52/49/51/-2/..../000/00               39 NE  AERO 37 NE  RMY N/A 10/13  66/48/57/+4/..../570/85               18 WNW AERO 17 WNW RMY 18 10/14  67/51/59/+7/..../335/50               18 WSW AERO 17 WSW RMY N/A 10/15  61/43/52/0/..../653/98                18 NNW AERO 17 NNW RMY N/A 10/16  61/45/53/+2/..../305/46               58 ESE AERO 58 ESE RMY N/A 10/17  60/46/53/+2/..../086/13               61 E   AERO 63 E   RMY N/A 10/18  57/41/49/-2/..../099/15               29 WNW AERO 32 W   RMY 32 10/19  58/36/47/-3/..../648/99               18 NW  AERO 18 NW  RMY 19 10/20  60/43/52/+2/T/280/43                  14 NE  AERO 16 NE  RMY N/A 10/21  59/49/54/+4/0.01/591/91               25 E   AERO 21 NE  RMY 23 10/22  58/47/53/+4/..../078/12               29 E   AERO 28 E   RMY 23 10/23  65/48/57/+8/..../431/67               35 W   AERO 35 W   RMY 36 10/24  67/43/55/+6/.../635/99                28 SSW AERO 28 SSW RMY 29 10/25  64/47/56/+7/.../217/34                20 WSW AERO 21 SW  RMY N/A 10/26  58/45/52/+4/.../502/79                20 N   AERO 18 N   RMY N/A 10/27  52/45/49/+1/1.43/000/00               37 ESE AERO 35 ESE RMY 37 10/28  53/46/50/+2/.../050/08                24 NNW AERO 24 NNW RMY N/A 10/29  54/47/51/+4/..../000/00               15 ESE AERO 15 ESE RMY 14 10/30  65/51/58/+11/..../138/22              24 S   AERO M  M   RMY N/A 10/31  68/58/63/+16/..../000/00              61 S   AERO M  M   RMY N/A PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER CALENDAR DAY DATA DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/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 11/01  67/35/51/+5/..../0.0/.../..            67 S   AERO M  M   RMY N/A 11/02  50/31/41/-5/0.00/0.0/.../..            17 WNW AERO 14 W   RMY N/A 11/03  53/35/44/-2/0.00/0.0/.../..            25 WSW AERO 23 W   RMY 26 11/04  53/33/43/-2/0.00/0.0/.../..            24 S   AERO 20 S   RMY 24 11/05  54/44/49/+4/0.33/0.0/.../..            22 S   AERO 18 WNW RMY 28 11/06  51/36/44/-1/0.00/0.0/.../..            28 WSW AERO 23 W   RMY 27 11/07  55/38/47/+2/0.27/0.0/.../..            30 S   AERO 26 SSW RMY 32 11/08  38/23/31/-13/0.00/0.0/.../..           38 NW  AERO 37 WNW RMY 44   11/09  39/20/30/-14/0.00/0.0/.../..           22 S   AERO 18 S   RMY N/A 11/10  51/30/41/-3/0.00/0.0/.../..            30 SW  AERO 30 SW  RMY 31 11/11  52/39/46/+3/T/0.0/.../..               23 NE  AERO 22 NE  RMY 23 11/12  42/20/31/-12/0.08/0.1/.../..           37 WNW AERO 37 WNW RMY 41 11/13  28/15/22/-21/0.00/0.0/.../..           32 WNW AERO 32 WNW RMY 35 11/14  39/17/28/-14/0.00/0.0/.../..          18 SW  AERO 17 SW  RMY 20 11/15 The low since midnight is 32F, daily normal minimum is 34F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR NOVEMBER 15 HIGH 74 IN 1993 LOW 15 IN 1933 PRECIP 1.66 INCHES IN 1981 SNOWFALL 4.0 IN 1967 PEAK GUST 65 SSE IN 2008 RECORDS FOR NOVEMBER 16 HIGH 73 IN 1927 LOW 8 IN 1933 PRECIP 2.25 INCHES IN 1981 SNOWFALL 2.0 IN 1913 PEAK GUST 78 S IN 1989 TODAY'S REPORT PREPARED BY: Andrew Swanson