BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA FRIDAY, DECEMBER 10, 2021 ALL TIMES ARE IN EASTERN STANDARD TIME SUNRISE: 0703E SUNSET:  1612E COOL AND OVERCAST THE THEME ATOP GREAT BLUE HILL.... After the coldest day since mid-March, not a whole lot to write home about today...and that's not a bad thing. Weather is tranquil with temps in the upper 30s, overcast skies, and winds gently flowing from the SSE. Visibility is checking in at around 45 miles.  Winds shifted overnight to the SSE - an indication that milder air will follow. Guidance suggests temps will make a run for 50s and 60s tomorrow! The high so far today is 41F, which is 1 degree below the normal max of 42F. The low since midnight is 27F, which equals the normal low of 27F. -------------------------------------------------------------- PRELIMINARY STATS FOR NOVEMBER 2021 TEMPERATURE, Deg. F Avg. Max. 50.8 [+0.7] Avg. Min. 33.6 [-0.2] Mean      42.2 [+0.2] 24-hour corrected mean: 41.6 Max. for month: 69F on the 18th Min. for month: 21F on the 30th HEATING DEGREE DAYS Total heating units:    680 [-12] Total for the season:  1007 [-197] Total for last season: 1204 PRECIPITATION, Inches Total: 1.92 [-2.39] Greatest in 24 hrs: 1.00 inch on the 12th SNOWFALL, Inches Total: 1.0 ins. [-0.8] Greatest in 24 hrs: 1.0 ins. from the 26th-27th  WIND, mph Avg. uncorrected wind speed: 11.2 mph Avg. corrected wind speed:   11.7 mph Prevailing wind direction:   WNW [16%] Peak gust and direction:     72 SSE on the 12th SUNSHINE: Campbell-Stokes card minutes: 11466 minutes of a possible 17010 or 67% Astronomical total minutes: 11874 minutes of a possible 17610 or 67% -------------------------------------------------------------- Today's Observations: 7 A.M. Weather: Overcast Stratus Temperature: 30F; Dew Point: 20F; Relative Humidity: 67% Wind: SE @ 9G12 kts Sea-level pressure: 1023.7 mb; 30.23 in. Hg: falling, then falling more slowly Visibility: 35 miles, hazy 6-hr Max temp: 30F 6-hr Min temp: 27F 24-hr Precip:  0.00 ins.  24-hr Snowfall: 0.0 ins.  Snow Depth: 1 ins. BHO SA 1155 40 OVC 35 237/30/20/1309G12/023/ HAZY/ 8/6// 4/001 56006 10030 20027 10 A.M. Weather: Overcast Stratus Temperature: 34F; Dew Point: 27F; Relative Humidity: 76% Wind: SSE @ 8G12 kts, Sea-level pressure: 1024.2 mb; 30.24 in Hg; rising unsteadily Visibility: 65 miles, hazy 3-hr Precip: 0.00 ins. 3-hr Snowfall: 0.0 ins. BHO SA 1455 40 OVC 65 242/34/27/1608G12/024/ HAZY/ 8/6// 52005 1 P.M. Weather: Scattered Stratus; Overcast Altocumulus/Altostratus Temperature: 40F, Dew point: 32F; Relative Humidity: 73% Wind: SSE @ 6 kts (wind light) Sea-level pressure: 1021.5mb; 30.16 in Hg; falling unsteadily Visibility: 30 miles, hazy 6-hr Max temp: 41F 6-hr Min temp: 30F 6-hr Precip: 0.00 ins. 6-hr Snowfall: 0.0 ins. Snow Depth: Trace BHO SA 1755 50 SCT 90 OVC 30 215/40/32/1606/016/ HAZY WND LGT/ 8/65/ 57027 10041 20030 SUMMARY FOR THURSDAY, DECEMBER 9, 2021 TEMPERATURE (DEGREES F) MAX.......35     NORMAL.....42 MIN.......20     NORMAL.....27 MEAN......28     NORMAL.....34 DEPARTURE FROM 30-YEAR (1991-2020) NORMAL................-6 TOTAL DEPARTURE FOR THE MONTH...........................+10 [+0.9 DEGREES/DAY] HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022) TOTAL HEATING UNITS FOR YESTERDAY...............37  DEPARTURE........+6 TOTAL HEATING UNITS FOR THE MONTH..............254  DEPARTURE.......-10 TOTAL HEATING UNITS FOR THE SEASON............1261  DEPARTURE......-207 TOTAL HEATING UNITS LAST SEASON TO DATE.......1233  DEPARTURE...... +28 PEAK WIND GUST (MPH):                      Official (1-Sec AVG).......32 NW  @ 11:10 A.M.                      AEROVANE...................30 NW  @ 12:12 P.M.                      VECTOR #2 (Instantaneous)..34     @ 11:09 A.M.                      DAVIS #2 ..................28 NE  @ 11:10 A.M.                      RMY #2 (Instantaneous).....33 NW  @ 11:09 A.M.                      ASOS...........OUT OF SERVICE D/T RENOVATIONS                      VECTOR #1......OUT OF SERVICE D/T RENOVATIONS                      DAVIS #1.......OUT OF SERVICE D/T RENOVATIONS                      RMY #1.........OUT OF SERVICE D/T RENOVATIONS                        MERLIN.........OUT OF SERVICE D/T RENOVATIONS FASTEST MILE: CONTACTING ANEMOMETER/OFFICIAL..................21 NW  @ 12:34 P.M. MAXIMUM 2-MINUTE VECTOR #2 AVERAGE..............23     @ 11:11 A.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............22 NW  @ 11:11 A.M. MAXIMUM 2-MINUTE RMY #2 AVERAGE.................22 NW  @ 11:11 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE.......OUT OF SERVICE D/T RENOVATIONS MAXIMUM 2-MINUTE DAVIS #1 AVERAGE...OUT OF SERVICE D/T RENOVATIONS MAXIMUM 2-MINUTE VECTOR #1 AVERAGE..OUT OF SERVICE D/T RENOVATIONS MAXIMUM 2-MINUTE RMY #1 AVERAGE.....OUT OF SERVICE D/T RENOVATIONS AVERAGE WIND SPEED AND DIRECTION:                      CONTACTING/OFFICIAL.......8.8 WNW [212 total miles]                      VECTOR #2.................9.5                      DAVIS #2..................9.1 NNW                      RMY #2....................9.4 NW                      RMY #1..............OUT OF SERVICE D/T RENOVATIONS                      ASOS................OUT OF SERVICE D/T RENOVATIONS                      VECTOR #1...........OUT OF SERVICE D/T RENOVATIONS                      DAVIS #1............OUT OF SERVICE D/T RENOVATIONS     PRECIPITATION (INCHES) THROUGH THIS MORNING (EST): TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.......0.00  DEPARTURE.....-0.18 TOTAL PRECIPITATION FOR THE MONTH.............0.44  DEPARTURE.....-1.17 TOTAL PRECIPITATION FOR THE YEAR.............57.21  DEPARTURE.....+7.39 SNOWFALL (INCHES) THROUGH THIS MORNING (EST): TOTAL SNOWFALL 24 HRS ENDING 7 A.M.............0.0  DEPARTURE......-0.3 TOTAL SNOWFALL FOR THE MONTH...................1.2  DEPARTURE......-1.4 TOTAL SNOWFALL FOR THE SEASON (2021-2022)......2.2  DEPARTURE......-2.9 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   59/41/50/+3/0.00/0.0/594/96      38 WNW AERO 39 WNW RMY 39 11/02   56/40/48/+1/0.00/0.0/247/40      25 SW  AERO 25 SW  RMY 26 11/03   51/35/43/-3/0.00/0.0/572/93      28 W   AERO 25 W   RMY 27      11/04   49/31/40/-6/0.00/0.0/446/73      17 NNE AERO 17 NNW RMY 16 11/05   49/32/41/-5/0.00/0.0/591/97      25 NW  AERO 24 NW  RMY 24 11/06   51/34/43/-2/0.00/0.0/595/98      18 SSW AERO 17 SW  RMY 19 11/07   55/37/46/+1/0.00/0.0/514/85      17 W   AERO 17 W   RMY 16 11/08   60/38/49/+4/0.00/0.0/578/96      20 N   AERO 18 N   RMY 19 11/09   69/45/57/+13/0.00/0.0/582/97     21 W   AERO 21 W   RMY 22 11/10   60/44/52/+8/0.00/0.0/389/65      36 NW  AERO 35 NW  RMY 35 11/11   56/40/48/+5/0.00/0.0/501/84      26 SE  AERO 28 SE  RMY 27 11/12   61/45/53/+10/1.00/0.0/000/00     72 SSE AERO 78 SSE RMY 76 11/13   60/36/48/+5/0.32/0.0/556/94      53 SW  AERO 53 SW  RMY 54 TSTM 11/14   47/33/40/-2/0.03/0.0/336/57      29 W   AERO 28 W   RMY 28 11/15   48/36/42/0/0.07/0.0/405/69       35 W   AERO 36 W   RMY 38 11/16   46/31/39/-3/0.00/0.0/555/95      40 WNW AERO 41 WNW RMY 42 11/17   49/30/40/-1/0.00/0.0/291/50      34 S   AERO 36 S   RMY 34 11/18   69/49/59/+18/T/0.0/557/96        39 NW  AERO 36 WNW RMY 42 11/19   51/32/42/+1/0.29/0.0/463/80      42 W   AERO 41 W   RMY 41 11/20   45/27/36/-4/0.00/0.0/525/91      23 S   AERO 23 S   RMY 24 11/21   52/36/44/+4/T/0.0/063/11         35 S   AERO 35 S   RMY 36  11/22   55/33/44/+4/0.09/0.0/011/02      41 WSW AERO 41 WSW RMY 42 11/23   38/24/31/-8/0.00/0.0/497/87      36 NW  AERO 37 NW  RMY 37 11/24   41/22/32/-7/0.00/0.0/569/100     33 NW  AERO 32 NW  RMY 34 11/25   53/31/42/+3/0.00/0.0/358/63      21 WNW AERO 21 W   RMY 21 11/26   43/31/37/-1/0.11/0.9/000/00      39 WNW AERO 39 WNW RMY 41 11/27   37/24/31/-7/0.01/0.1/462/82      47 WNW AERO 45 WNW RMY 48 11/28   36/24/30/-8/T/T/090/16           22 W   AERO 21 W   RMY 23 11/29   39/25/32/-6/0.00/0.0/135/24      30 NW  AERO 28 NW  RMY 30 11/30   40/21/31/-6/0.00/0.0/392/70      27 WNW AERO 23 WSW RMY 26 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   44/30/37/0.00/0.0/.../..          35 W   AERO 35 W   RMY 34       12/02   58/35/47/10/T/0.0/.../..          56 WNW AERO 59 WNW RMY 62 TSTM 12/03   41/28/35/-1/0.00/0.0/.../..       46 NW  AERO 44 NW  RMY 46 12/04   39/25/32/-4/0.00/0.0/.../..       25 SW  AERO 23 SW  RMY 26 12/05   45/32/39/+3/0.00/0.0/.../..       25 SE  AERO 25 SE  RMY 25 12/06   59/37/48/+13/0.34/0.0/.../..      59 WNW AERO 59 NW  RMY 60 12/07   40/29/35/0/T/0.0/.../...          47 WNW AERO 36 WNW RMY 48 12/08   34/25/30/-5/..../.../.../..       26 NNE AERO 25 NE  RMY 26 12/09   35/20/28/-6/..../.../.../..       32 NW  AERO 30 NW  RMY 33 12/10   The low since midnight is 27F, 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 10 HIGH 62 IN 1946 LOW -6 IN 1902 PRECIP 1.67 INS. IN 1907 SNOWFALL 6.0 INS. IN 1905 PEAK GUST 66e SW IN 1940 RECORDS FOR DECEMBER 11 HIGH 63 IN 1911 LOW -1 IN 1988 PRECIP 2.36 INS. IN 1992 SNOWFALL 4.8 INS. IN 2019 PEAK GUST 78 S IN 1969 TODAY'S REPORT PREPARED BY: Andrew Swanson