BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA THURSDAY, DECEMBER 9, 2021 ALL TIMES ARE IN EASTERN STANDARD TIME SUNRISE: 0702E SUNSET:  1610E PARTLY CLOUDY WITH GOOD VISIBILITY FOLLOWING SOME OVERNIGH SNOWFALL.... Overnight snow left 1.2 inches, with a 0.10 inch being measured for the liquid amount. Skies were partly cloudy at most, and visibility reached 70 miles by the 1 P.M. observation.   Wind intensified as the day went on, with an average speed of 10 mph and a max gust of 25 mph around noontime.   The high so far today is 35F, which is 7 degrees below the normal max of 42F. The low since midnight is 20F, 7 degrees below 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: Clear, few cumulus offshore, few cirrostratus Temperature: 21F; Dew Point: 17F; Relative Humidity: 54% Wind: W @ 6 kts, light Sea-level pressure: 1018.0 mb; 30.06 in. Hg: rising, then more slowly Visibility: 30 miles, hazy 6-hr Max temp: 24F 6-hr Min temp: 20F 24-hr Precip:  0.10 ins. 24-hr Snowfall: 1.2 ins. Snow Depth: 1 ins. BHO SA 1155 CLR 30 180/21/17/2706/006/ FEW CU OFFSHR FEW CS ALQDS NEW SNW PST 24 HRS 1.2 INS. HAZY WND LGT/ 8/105 4/001 51022 70010 10024 20020 10 A.M. Weather: Clear, few cumulus offshore, few cirrostratus Temperature: 30F; Dew Point: 24F; Relative Humidity: 78% Wind: NW @ 9 kts, Sea-level pressure: 1020.6 mb; 30.14 in Hg; rising, then more rapidly Visibility: 40 miles 3-hr Precip: 0.00 ins. 3-hr Snowfall: 0.0 ins. BHO SA 1455 CLR 40 206/30/24/3109/014/ FEW CU OFFSHR FEW CS ALQDS/ 8/105 53026 1 P.M. Weather: Scattered cumulus and cirrostratus Temperature: 34F, Dew point: 19F; Relative Humidity: 54% Wind: NNW @ 10G20 kts Sea-level pressure: 1020.9 mb; 30.15 in Hg; steady, then rising Visibility: 70 miles 6-hr Max temp: 35F 6-hr Min temp: 21F 6-hr Precip: 0.00 ins. 6-hr Snowfall: 0.0 ins. Snow Depth: 0 ins. BHO SA 1755 40 SCT 250 SCT 70 209/34/19/3410G20/015/ 8/106 53003 10035 20021 SUMMARY FOR WEDNESDAY, DECEMBER 8, 2021 TEMPERATURE (DEGREES F) MAX.......34     NORMAL.....42 MIN.......25     NORMAL.....27 MEAN......30     NORMAL.....35 DEPARTURE FROM 30-YEAR (1991-2020) NORMAL................-5 TOTAL DEPARTURE FOR THE MONTH...........................+16 [+1.8 DEGREES/DAY] HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022) TOTAL HEATING UNITS FOR YESTERDAY...............35  DEPARTURE........+5 TOTAL HEATING UNITS FOR THE MONTH..............217  DEPARTURE.......-17 TOTAL HEATING UNITS FOR THE SEASON............1224  DEPARTURE......-214 TOTAL HEATING UNITS LAST SEASON TO DATE.......1195  DEPARTURE...... +29 PEAK WIND GUST (MPH):                      Official (1-Sec AVG).......26 NNE @  6:21 P.M.                      AEROVANE...................25 NE  @  6:07 P.M.                      VECTOR #2 (Instantaneous)..26     @  6:07 P.M.                      DAVIS #2 ..................25 NE  @  6:07 P.M.                      RMY #2 (Instantaneous).....26 NE  @  6:07 P.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..................16 NNE @  6:24 P.M. MAXIMUM 2-MINUTE VECTOR #2 AVERAGE..............17     @  6:23 P.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............17 NNE @  6:23 P.M. MAXIMUM 2-MINUTE RMY #2 AVERAGE.................17 NNE @  9:26 P.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.......8.3 NNE [198 total miles]                      VECTOR #2.................8.9                      DAVIS #2..................8.4 NNE                      RMY #2....................8.7 NNE                      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.......0.10  DEPARTURE.....-0.08 TOTAL PRECIPITATION FOR THE MONTH.............0.44  DEPARTURE.....-0.99 TOTAL PRECIPITATION FOR THE YEAR.............57.21  DEPARTURE.....+7.57 SNOWFALL (INCHES) THROUGH THIS MORNING (EST): TOTAL SNOWFALL 24 HRS ENDING 7 A.M.............1.2  DEPARTURE......+0.8 TOTAL SNOWFALL FOR THE MONTH...................1.2  DEPARTURE......-1.0 TOTAL SNOWFALL FOR THE SEASON (2021-2022)......2.2  DEPARTURE......-2.5 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   The low since midnight is 20F, 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 9 HIGH 68 IN 1966 LOW -14 IN 1902 PRECIP 3.23 INS. IN 2014 SNOWFALL 10.8 INS. IN 2005 PEAK GUST 66 SE IN 1973 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 TODAY'S REPORT PREPARED BY: Benjamin Turner