BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA MONDAY, DECEMBER 13, 2021 ALL TIMES ARE IN EASTERN STANDARD TIME SUNRISE: 0705E SUNSET:  1612E CLOUDS THIS MORNING GIVE WAY TO SUNSHINE THIS AFTERNOON; TURNING MILD.... Plenty of cloud cover was the rule this morning, but the clouds are clearing out early this afternoon leaving us with a very nice afternoon. Temperatures are responding nicely to the increasing sunshine with readings shooting into the upper 40s early this afternoon, likely heading for the low 50s. Visibility has been somewhat limited today, starting the day at about 40 miles, but increasing to 60 miles by mid morning. The high so far today is 49F, which is 8 degrees above the normal max of 41F. The low since midnight is 35F, which 9 degrees above the normal low of 26F. -------------------------------------------------------------- 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: Broken altocumulus, broken cirrostratus, virga all quadrants Temperature: 39F; Dew Point: 19F; Relative Humidity: 45% Wind: WSW @ 16G25 kts, peak wind WSW 32 mph at 6:44 A.M. Sea-level pressure: 1020.7 mb; 30.14 in. Hg: steady, then rising Visibility: 40 miles 6-hr Max temp: 39F 6-hr Min temp: 35F 24-hr Precip:  0.00 ins. 24-hr Snowfall: 0.0 ins. Snow Depth: 0 ins. BHO SA 1155 E150 BKN 200 BKN 40 207/39/19/2516G25/014/ VIRGA ALQDS PK WND 2528/44/ 8/076 53005 10039 20035 10 A.M. Weather: Overcast altocumulus, few breaks in overcast distant WNW-NW Temperature: 40F; Dew Point: 20F; Relative Humidity: 45% Wind: WSW @ 12G21 kts Sea-level pressure: 1021.3 mb; 30.16 in Hg; rising, then more slowly Visibility: 60 miles 3-hr Precip: 0.00 ins. 3-hr Snowfall: 0.0 ins. BHO SA 1455 E150 OVC 60 213/40/20/2512G21/016/ FEW BINOVC DSNT WNW-NW HIER CLDS VSBL DSNT WNW-NW VIRGA ALQDS/ 8/07/ 51006 1 P.M. Weather: Scattered altocumulus, scattered cirrocumulus/cirrostratus Temperature: 47F, Dew point: 22F; Relative Humidity: 37% Wind: SW @ 13G25 kts Sea-level pressure: 1019.6mb; 30.11 in Hg; falling, then more slowly Visibility: 60 miles 6-hr Max temp: 48F 6-hr Min temp: 39F 6-hr Precip: 0.00 ins. 6-hr Snowfall: 0.0 ins. Snow Depth: 0.0 ins. BHO SA 1755 SCT 130 SCT 200 60 196/47/22/2313G25/011/ 8/079 56017 10048 20039 SUMMARY FOR SUNDAY, DECEMBER 12, 2021 TEMPERATURE (DEGREES F) MAX.......58     NORMAL.....41 MIN.......36     NORMAL.....26 MEAN......47     NORMAL.....34 DEPARTURE FROM 30-YEAR (1991-2020) NORMAL...............+13 TOTAL DEPARTURE FOR THE MONTH...........................+40 [+3.1 DEGREES/DAY] HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022) TOTAL HEATING UNITS FOR YESTERDAY...............18  DEPARTURE.......-13 TOTAL HEATING UNITS FOR THE MONTH..............317  DEPARTURE.......-41 TOTAL HEATING UNITS FOR THE SEASON............1324  DEPARTURE......-238 TOTAL HEATING UNITS LAST SEASON TO DATE.......1307  DEPARTURE...... +17 PEAK WIND GUST (MPH):                      Official (1-Sec AVG).......55 WNW @  1:48 A.M.                      AEROVANE...................55 WNW @  1:50 A.M.                      VECTOR #2 (Instantaneous)..60     @  1:48 A.M.                      DAVIS #2 ..................52 WNW @  1:49 A.M.                      RMY #2 (Instantaneous).....58 WNW @  1:50 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..................43 WNW @  1:51 A.M. MAXIMUM 2-MINUTE VECTOR #2 AVERAGE..............42     @  1:51 A.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............42 WNW @  1:50 A.M. MAXIMUM 2-MINUTE RMY #2 AVERAGE.................41 WNW @  1:51 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......18.5 WNW  [444 total miles]                      VECTOR #2................18.9                      DAVIS #2.................19.1 WNW                      RMY #2...................18.7 WNW                      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.............0.83  DEPARTURE.....-1.32 TOTAL PRECIPITATION FOR THE YEAR.............57.60  DEPARTURE.....+7.24 SNOWFALL (INCHES) THROUGH THIS MORNING (EST): TOTAL SNOWFALL 24 HRS ENDING 7 A.M.............0.0  DEPARTURE......-0.4 TOTAL SNOWFALL FOR THE MONTH...................1.2  DEPARTURE......-2.5 TOTAL SNOWFALL FOR THE SEASON (2021-2022)......2.2  DEPARTURE......-4.0 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/-5/0.05/0.6/.../..       26 NNE AERO 25 NE  RMY 26 12/09   35/20/28/-6/0.05/0.6/.../..       32 NW  AERO 30 NW  RMY 33 12/10   43/27/35/+1/0.00/0.0/.../..       21 SE  AERO 20 SE  RMY 21 12/11   62/37/50/+16/0.34/0.0/.../..      57 SSW AERO 59 SSW RMY 58 12/12   58/36/47/+13/0.05/0.0/.../..      55 WNW AERO 55 WNW RMY 58 12/13   The low since midnight is 35F, the daily normal low is 26F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) RECORDS FOR DECEMBER 13 HIGH 60 IN 1984 LOW 0 IN 1893 PRECIP 1.45 INS. IN 1983 SNOWFALL 9.2 INS. IN 2007 PEAK GUST 81e WNW IN 1976 RECORDS FOR DECEMBER 14 HIGH 62 IN 1901 LOW -6 IN 1893 PRECIP 1.94 INS. IN 2002 SNOWFALL 8.0 INS. IN 1907 PEAK GUST 78e ENE IN 1941 TODAY'S REPORT PREPARED BY: Matt Douglas