BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA TUESDAY, DECEMBER 7, 2021 ALL TIMES ARE IN EASTERN STANDARD TIME SUNRISE: 0700E SUNSET:  1612E MUCH COLDER TODAY FOLLOWING THE "WARM" CONDITIONS YESTERDAY.... Another strong cold front plowed through the region last night bringing with it a brief period of heavy rain and strong wind gusts. Rainfall with the front totaled 0.24", but half of that fell in 1 hour between 10-11 P.M. last night, the hour in which the front crossed the hill. As a matter of fact, the temperature dropped 13 degrees within that hour! The front also brought strong wind gusts with a peak gust to 59mph being measured here on the hill. Today is much calmer with increasing high clouds and much colder air. The wind is also much lighter today only averaging around 15 mph since 7 A.M. this morning. The air is definitely much drier today with the dew point holding in the upper teens and low 20s. Contrast this to readings in the 50s yesterday! With the dry air, visibility is excellent today, rising to 70 miles by mid morning! The high so far today is 40F, which is 3 degrees below the normal max of 43F. The low since midnight is 33F, 6 degrees above 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: N/A Astronomical total minutes: N/A -------------------------------------------------------------- Today's Observations: 7 A.M. Weather: Clear, few stratocumulus distant NE-E and distant NW-NNW, few cirrus NE-SE-SW Temperature: 33F; Dew Point: 20F; Relative Humidity: 59% Wind: W @ 13G22 kts, peak wind W 30 mph at 6:28 A.M. Sea-level pressure: 1015.2 mb; 29.98 in. Hg: rising, then more slowly Visibility: 60 miles 6-hr Max temp: 38F 6-hr Min temp: 33F 24-hr Precip:  0.26 ins. 24-hr Snowfall: 0.0 ins. Snow Depth: 0 ins. BHO SA 1155 CLR 60 152/33/20/2813G22/998/ FEW SC DSNT NE-E AND DSNT NW-NNW FEW CI NE-SE-SW PK WND 2826/28/ 8/501 51039 70026 10038 20033 10 A.M. Weather: Scattered cirrus, few stratocumulus distant S-NW Temperature: 37F; Dew Point: 19F; Relative Humidity: 48% Wind: W @ 9G17 kts Sea-level pressure: 1018.7 mb; 30.08 in Hg; rising, then more slowly Visibility: 70 miles 3-hr Precip: 0.00 ins. 3-hr Snowfall: 0.0 ins. BHO SA 1455 250 -SCT 70 187/37/19/2809G18/008/ FEW SC DSNT S-NW/ 8/501 51035 1 P.M. Weather: Scattered stratocumulus, scattered cirrostratus, thin broken cirrus Temperature: 38F, Dew point: 18F; Relative Humidity: 44% Wind: WNW @ 13G20 kts, peak wind W 30 mph at 12:13 P.M. Sea-level pressure: 1017.9 mb; 30.06 in Hg; steady, then falling Visibility: 70 miles 6-hr Max temp: 40F 6-hr Min temp: 33F 6-hr Precip: 0.00 ins. 6-hr Snowfall: 0.0 ins. Snow Depth: 0 ins. BHO SA 1755 50 SCT E200 SCT 250 -BKN 70 179/38/18/2913G20/006/ PK WND 2826/13/ 8/506 58008 10040 20033 SUMMARY FOR MONDAY, DECEMBER 6, 2021 TEMPERATURE (DEGREES F) MAX.......59     NORMAL.....43 MIN.......37     NORMAL.....28 MEAN......48     NORMAL.....35 DEPARTURE FROM 30-YEAR (1991-2020) NORMAL...............+13 TOTAL DEPARTURE FOR THE MONTH...........................+21 [+3.3 DEGREES/DAY] HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022) TOTAL HEATING UNITS FOR YESTERDAY...............17  DEPARTURE.......-13 TOTAL HEATING UNITS FOR THE MONTH..............152  DEPARTURE.......-22 TOTAL HEATING UNITS FOR THE SEASON............1159  DEPARTURE......-218 TOTAL HEATING UNITS LAST SEASON TO DATE.......1119  DEPARTURE...... +40 PEAK WIND GUST (MPH):                      Official (1-Sec AVG).......59 WNW @ 10:12 P.M.                      AEROVANE...................59 NW  @ 10:20 P.M.                      VECTOR #2 (Instantaneous)..66     @ 10:13 P.M.                      DAVIS #2 ..................52 NW  @ 10:13 P.M.                      RMY #2 (Instantaneous).....60 WNW @ 10:12 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..................42 WNW @ 10:15 P.M. MAXIMUM 2-MINUTE VECTOR #2 AVERAGE..............42     @ 10:14 P.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............43 WNW @ 10:15 P.M. MAXIMUM 2-MINUTE RMY #2 AVERAGE.................42 WNW @ 10:14 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.......22.7 SSW  [545 total miles]                      VECTOR #2.................22.5                      DAVIS #2..................22.2 SSW                      RMY #2....................22.6 SSW                      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.......0.26  DEPARTURE.....+0.08 TOTAL PRECIPITATION FOR THE MONTH.............0.34  DEPARTURE.....-0.73 TOTAL PRECIPITATION FOR THE YEAR.............57.11  DEPARTURE.....+7.83 SNOWFALL (INCHES) THROUGH THIS MORNING (EST): TOTAL SNOWFALL 24 HRS ENDING 7 A.M.............0.0  DEPARTURE......-0.3 TOTAL SNOWFALL FOR THE MONTH...................0.0  DEPARTURE......-1.5 TOTAL SNOWFALL FOR THE SEASON (2021-2022)......1.0  DEPARTURE......-3.0 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/.../..      40 WNW AERO 41 WNW RMY 42 11/17   49/30/40/-1/0.00/0.0/.../..      34 S   AERO 36 S   RMY 34 11/18   69/49/59/+18/T/0.0/.../..        39 NW  AERO 36 WNW RMY 42 11/19   51/32/42/+1/0.29/0.0/.../..      42 W   AERO 41 W   RMY 41 11/20   45/27/36/-4/0.00/0.0/.../..      23 S   AERO 23 S   RMY 24 11/21   52/36/44/+4/T/0.0/.../..         35 S   AERO 35 S   RMY 36 11/22   55/33/44/+4/0.09/0.0/.../..      41 WSW AERO 41 WSW RMY 42 11/23   38/24/31/-8/0.00/0.0/.../..      36 NW  AERO 37 NW  RMY 37 11/24   41/22/32/-7/0.00/0.0/.../..      33 NW  AERO 32 NW  RMY 34 11/25   53/31/42/+3/0.00/0.0/.../..      21 WNW AERO 21 W   RMY 21 11/26   43/31/37/-1/0.11/0.9/.../..      39 WNW AERO 39 WNW RMY 41 11/27   37/24/31/-7/0.01/0.1/.../..      47 WNW AERO 45 WNW RMY 48 11/28   36/24/30/-8/T/T/.../..           22 W   AERO 21 W   RMY 23 11/29   39/25/32/-6/0.00/0.0/.../..      30 NW  AERO 28 NW  RMY 30 11/30   40/21/31/-6/0.00/0.0/.../..      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   The low since midnight is 33F, 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 7 HIGH 74 IN 1998 LOW 6 IN 1906 PRECIP 1.67 INS. IN 1953 SNOWFALL 6.3 INS. IN 2003 PEAK GUST 76e SE IN 1976 RECORDS FOR DECEMBER 8 HIGH 62 IN 1966 LOW -4 IN 1906 PRECIP 1.54 INS. IN 1969 SNOWFALL 2.5 INS. IN 2001 PEAK GUST 78e W IN 1979 TODAY'S REPORT PREPARED BY: Matt Douglas