BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA SATURDAY, DECEMBER 5, 2020 ALL TIMES ARE IN EASTERN STANDARD TIME GRADUALLY COOLER AS RAIN BEGINS TO MIX IN WITH FROZEN PRECIPITATION.... We observed visibility only up to 3 miles due to fog, and a rain that is slowly mixing with ice pellets and snow. Wind is definitely picking up from the northeast, and has reached 45 mph following the 1 P.M. observation. Pressure is trending downwards very fast, dropping by more than 12 millibars between 7 A.M. and 1 P.M. Temperature has dropped since this morning, by more than 7 degrees since the rain came in. Rain began to mix with ice pellets a little before noon, and the ice pellets have become more prevalent since then. Current event rainfall total is around 1.30 inches, with only a trace left of snow.     The high so far today is 43F, the same as the daily normal high of 43F. The low since midnight is 39F, 12 degrees above the normal low of 27F.  Today's Observations: 7 A.M. Weather: Overcast stratus, rain Temperature: 41F; Dew Point: 41F; Relative Humidity: 100% Wind: NE at 9 kts Sea-level pressure: 29.78 in Hg; falling, then more rapidly Visibility: 3 miles, fog 6-hr Max temp: 43F 6-hr Min temp: 41F 24-hr Precip: 0.37 ins. 24-hr Snow: 0.0 ins. Snow Depth: 0 ins. BHO SA 1155 10 OVC 3RF 086/41/41/0509/978/ RCTD/ 8/6// 70037 58018 10043 20041 10 A.M. Weather: Overcast stratus, rain Temperature: 40F; Dew Point: 40F; Relative Humidity: 100% Wind: NE at 13G21 kts Sea-level pressure: 29.67 in Hg; falling rapidly Visibility: 1 mile, fog 3-hr Precip: 0.34 ins. 3-hr Snow: 0.0 ins. BHO SA 1455 10 OVC 1RF 046/40/40/0113G21/967/ RCTD PRESFR/ 8/6// 6034/ 56038 1 P.M. Weather: Overcast stratus, rain and some ice pellets Temperature: 39F; Dew Point: 39F; Relative Humidity: 100% Wind: N at 18G32 kts, peak of 41 mph at 12:17 P.M. Sea-level pressure: 29.42 in Hg; falling rapidly Visibility: 2 miles, fog 6-hr Max temp: 42F 6-hr Min temp: 39F 6-hr Precip: 0.73 ins. 6-hr Snow: Trace Snow Depth: 0 ins. BHO SA 1755 10 OVC 2RF 963/39/39/0118G32/942/ RCTD IP-CTD PRESFR PK WND 0136/17/ 8/6// 6073/ 56083 10042 20039 SUMMARY FOR FRIDAY, DECEMBER 4, 2020 TEMPERATURE (DEGREES F) MAX.......58   NORMAL.....43 MIN.......40   NORMAL.....28 MEAN......49   NORMAL.....35 DEPARTURE FROM 30-YEAR NORMAL................... +16 TOTAL DEPARTURE FOR THE MONTH................... +35 [+8.6 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............16  DEPARTURE......-16 TOTAL HEATING UNITS FOR THE MONTH...............83  DEPARTURE......-33 TOTAL HEATING UNITS FOR THE SEASON............1056  DEPARTURE.....-322 TOTAL HEATING UNITS LAST SEASON TO DATE.......1387  DEPARTURE.....-331 PEAK WIND GUST FOR YESTERDAY (MPH):                      420C/Official..............35 SSW  AT  2:47 P.M.                      AEROVANE (south tower).....35 SSW  AT  2:41 P.M.                      ASOS.......................35 SSW  AT  2:44 P.M.                      DAVIS #1...................38 N    AT  2:44 P.M.                      DAVIS #2 (south tower).....33 SSE  AT  2:27 P.M.                      RMY........................37                            VECTOR.....................40                          MERLIN.....................36 FASTEST MILE FOR YESTERDAY: CONTACTING/OFFICIAL.............................26 SSW  AT   2:32 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................25 SSW  AT   2:31 P.M. MAXIMUM 2-MINUTE DAVIS #1 AVERAGE...............25 SW   AT   2:31 P.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............26 SSW  AT   2:31 P.M. AVERAGE WIND SPEED AND DIRECTION:                      CONTACTING/OFFICIAL......15.7 SSW  [376 total miles]                      ASOS.....................15.9      [382 total miles]                      DAVIS #1.................15.4 SSW  [370 total miles]                      DAVIS #2.................16.3 SSW  [391 total miles]                      RMY......................15.8 SSW  [380 total miles]                      VECTOR...................16.3      [382 total miles] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST): TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.......0.37  DEPARTURE....+0.21                              ASOS.............0.35 TOTAL PRECIPITATION FOR THE MONTH.............0.98  DEPARTURE....+0.12                              ASOS.............1.00 TOTAL PRECIPITATION FOR THE YEAR.............47.38  DEPARTURE....-1.80                               ASOS...........48.33 SNOWFALL (INCHES) THROUGH THIS MORNING (EST): TOTAL SNOWFALL 24 HOURS ENDING 7 A.M...........0.0  DEPARTURE.....-0.3 TOTAL SNOWFALL FOR THE MONTH...................0.0  DEPARTURE.....-1.1 TOTAL SNOWFALL FOR THE SEASON..................6.5  DEPARTURE.....+2.8 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   49/36/43/-3/0.69/0.0/006/01      38 W     AERO 40 W    RMY 39 11/02   40/31/36/-10/T/T/425/69          61 WNW   AERO 62 WNW  RMY 62 11/03   43/29/36/-10/0.00/0.0/473/77     48 WNW   AERO 53 WNW  RMY 48 11/04   54/30/42/-3/0.00/0.0/550/90      30 SSW   AERO 30 SSW  RMY 30 11/05   69/49/59/+14/0.00/0.0/548/90     37 SSW   AERO 40 SSW  RMY 38 11/06   72/55/64/+19/0.00/0.0/394/65     28 SW    AERO 28 SW   RMY M 11/07   75/54/65/+20/0.00/0.0/562/93     21 WSW   AERO 21 WSW  RMY 21 11/08   73/54/64/+20/0.00/0.0/584/97     18 W     AERO 18 W    RMY 19 11/09   74/52/63/+19/0.00/0.0/593/99     20 WSW   AERO 18 WSW  RMY 21 11/10   74/53/64/+20/0.00/0.0/585/98     30 SW    AERO 28 SW   RMY 31 11/11   73/58/66/+23/0.04/0.0/137/23     40 SW    AERO 44 SW   RMY 45 11/12   64/46/55/+12/0.04/0.0/000/00     32 NNW   AERO 31 NNW  RMY 33 11/13   48/38/43/0/0.30/0.0/000/00       22 NW    AERO 21 NW   RMY 25 11/14   49/32/41/-1/0.00/0.0/276/47      26 NW    AERO 28 NW   RMY 29 11/15   58/30/44/+2/0.62/0.0/311/53      60 S     AERO 67 S    RMY 65 11/16   53/39/46/+4/0.00/0.0/526/90      40 WNW   AERO 41 WNW  RMY 43 11/17   47/32/40/-1/0.00/0.0/204/35      28 NW    AERO 28 NW   RMY 30 11/18   32/19/26/-15/0.00/0.0/580/100    40 NW    AERO 46 NW   RMY 43 11/19   44/18/31/-10/0.00/0.0/393/68     37 SW    AERO 39 SW   RMY 43     11/20   63/44/54/+14/0.00/0.0/495/86     33 SSW   AERO 35 SSW  RMY 37 11/21   62/40/51/+11/0.00/0.0/339/59     24 W     AERO 23 W    RMY 27 11/22   45/33/39/-1/T/0.0/000/00         28 SE    AERO 28 SE   RMY 31 11/23   58/32/45/+6/1.77/0.0/000/00      42 WNW   AERO 48 WNW  RMY 46 TSTM 11/24   42/27/35/-4/0.00/0.0/569/100     31 WNW   AERO 32 WNW  RMY 33 11/25   50/26/38/-1/0.01/0.0/107/03      23 SSE   AERO 23 SSE  RMY 26 11/26   58/45/52/+14/0.36/0.0/000/00     36 S     AERO 37 S    RMY 41 11/27   53/46/50/+12/0.00/0.0/056/10     23 WNW   AERO 23 WNW  RMY 23 11/28   52/36/44/+6/T/0.0/180/32         28 WNW   AERO 30 WNW  RMY 27 11/29   52/33/43/+6/0.00/0.0/561/100     21 SSW   AERO 21 SSW  RMY 22 11/30   62/40/51/+14/1.35/0.0/000/00     81 SSE   AERO 82 SSE  RMY 86 DAILY RECORDS FOR NOVEMBER 2020 11/06/20: DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 72F,           BREAKS PREVIOUS RECORD OF 71F SET IN 1959 AND 2015 11/07/20: DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 75F,           TIES PREVIOUS RECORD OF 75F SET IN 1938 11/08/20: DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 73F,           BREAKS PREVIOUS RECORD OF 72F SET IN 1938 11/09/20: DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 74F,           BREAKS PREVIOUS RECORD OF 72F SET IN 1975 11/11/20: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 58F,           BREAKS PREVIOUS RECORD OF 56F IN 2002           DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 73F,           BREAKS PREVIOUS RECORD OF 68F IN 1984 PRELIMINARY CLIMATE SUMMARY FOR DECEMBER 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 12/01   62/40/51/+14/..../0.0/.../..      60 S    AERO 67 W    RMY 64 12/02   42/32/37/+1/..../.../.../..       32 SW   AERO 32 SW   RMY 35 12/03   49/30/40/+4/0.00/0.0/.../..       25 SSW  AERO 25 SSW  RMY 28 12/04   58/40/49/+14/..../.../.../..      35 SSW  AERO 35 SSW  RMY 37 12/05 The low since midnight is 41F, the daily normal low is 27F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR DECEMBER 5 HIGH 65 IN 2001 LOW -1 IN 1926 PRECIP 2.86 INS. IN 1993 SNOWFALL 7.0 INS. IN 1926, 1981 PEAK GUST 67 MPH WNW IN 1961, S IN 1973 RECORDS FOR DECEMBER 6 HIGH 70 IN 2001 LOW 5 IN 1901,1935 PRECIP 2.78 INS. IN 2003 SNOWFALL 17.0 INS. IN 2003 PEAK GUST 74 MPH NW IN 1981 TODAY'S REPORT PREPARED BY: Benjamin Turner