BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA TUESDAY, DECEMBER 14, 2021 ALL TIMES ARE IN EASTERN STANDARD TIME SUNRISE: 0706E SUNSET:  1612E HIGH CLOUDS THIS MORNING GIVE WAY TO SUNSHINE THIS AFTERNOON.... Some passing mainly high level clouds were the rule this morning, but these have now pushed off to the south early this afternoon leaving us with abundant sunshine. Temperatures are once again on the mild side with readings again in the upper 40s and low 50s across the region. Certainly can't beat this in mid December! The air has dried out quite a bit this afternoon as the dew point has dropped into the upper teens and low 20s after spending the morning in the upper 20s. Visibility started off a bit limited due to haziness early this morning, but has recovered nicely with 70 miles being observed since mid morning. Winds have been generally on the light side today, especially when compared to recent days. The average has been around 10-12 mph since 7 A.M. The peak gust occurred in the wee hours of this morning with a value of 31 mph being measured just after 1:30 A.M. The high so far today is 50F, which is 9 degrees above the normal max of 41F. The low since midnight is 37F, which 12 degrees above the normal low of 25F. -------------------------------------------------------------- Today's Observations: 7 A.M. Weather: Thin broken cirrus, few stratocumulus distant W-NW Temperature: 37F; Dew Point: 27F; Relative Humidity: 67% Wind: NW @ 11 kts Sea-level pressure: 1026.7 mb; 30.32 in. Hg: rising, then more slowly Visibility: 40 miles, hazy 6-hr Max temp: 43F 6-hr Min temp: 37F 24-hr Precip:  0.00 ins. 24-hr Snowfall: 0.0 ins. Snow Depth: 0 ins. BHO SA 1155 E250 -BKN 40 267/37/27/3111/032/ FEW SC DSNT W-NW HAZY/ 8/501 51041 10043 20037 10 A.M. Weather: Broken cirrocumulus, thin broken cirrus Temperature: 42F; Dew Point: 28F; Relative Humidity: 57% Wind: NW @ 8 kts Sea-level pressure: 1029.1 mb; 30.39 in Hg; rising, then more slowly Visibility: 70 miles 3-hr Precip: 0.00 ins. 3-hr Snowfall: 0.0 ins. BHO SA 1455 E200 BKN 250 -BKN 70 291/42/28/3208/039/ 8/009 51031 1 P.M. Weather: Clear, few cirrus distant SE-SW-WSW Temperature: 48F, Dew point: 20F; Relative Humidity: 32% Wind: NW @ 12G20 kts Sea-level pressure: 1029.8mb; 30.41 in Hg; rising unsteadily Visibility: 70 miles 6-hr Max temp: 50F 6-hr Min temp: 37F 6-hr Precip: 0.00 ins. 6-hr Snowfall: 0.0 ins. Snow Depth: 0.0 ins. BHO SA 1755 CLR 70 298/48/20/3212G20/041/ FEW CI DSNT SE-SW-WSW/ 8/001 52007 10050 20037 SUMMARY FOR MONDAY, DECEMBER 13, 2021 TEMPERATURE (DEGREES F) MAX.......50     NORMAL.....41 MIN.......35     NORMAL.....26 MEAN......43     NORMAL.....33 DEPARTURE FROM 30-YEAR (1991-2020) NORMAL...............+10 TOTAL DEPARTURE FOR THE MONTH...........................+50 [+3.6 DEGREES/DAY] HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022) TOTAL HEATING UNITS FOR YESTERDAY...............22  DEPARTURE.......-10 TOTAL HEATING UNITS FOR THE MONTH..............339  DEPARTURE.......-51 TOTAL HEATING UNITS FOR THE SEASON............1346  DEPARTURE......-248 TOTAL HEATING UNITS LAST SEASON TO DATE.......1325  DEPARTURE...... +21 PEAK WIND GUST (MPH):                      Official (1-Sec AVG).......32 WSW @  7:28 A.M.                      AEROVANE...................33 WSW @  7:29 A.M.                      VECTOR #2 (Instantaneous)..35     @  7:28 A.M.                      DAVIS #2 ..................32 WSW @  6:56 A.M.                      RMY #2 (Instantaneous).....33 WSW @  6:18 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..................22 SW  @  3:28 A.M. MAXIMUM 2-MINUTE VECTOR #2 AVERAGE..............22     @  3:10 A.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............23 WSW @  3:10 A.M. MAXIMUM 2-MINUTE RMY #2 AVERAGE.................22 WSW @  3:10 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......15.7 WSW  [377 total miles]                      VECTOR #2................16.4                      DAVIS #2.................16.7 WSW                      RMY #2...................16.3 WSW                      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.....-1.50 TOTAL PRECIPITATION FOR THE YEAR.............57.60  DEPARTURE.....+7.06 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......-2.9 TOTAL SNOWFALL FOR THE SEASON (2021-2022)......2.2  DEPARTURE......-4.4 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   50/35/43/+10/0.00/0.0/.../..      32 WSW AERO 33 WSW RMY 33 12/14   The low since midnight is 37F, the daily normal low is 25F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) 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 RECORDS FOR DECEMBER 15 HIGH 64 IN 1975 LOW 4 IN 1900, 1905, 1933 PRECIP 1.80 INS. IN 1981 SNOW 7.5 INS. IN 1951 PEAK GUST 65 MPH NW IN 1991 TODAY'S REPORT PREPARED BY: Matt Douglas