BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA THURSDAY, JANUARY 14, 2021 ALL TIMES ARE IN EASTERN STANDARD TIME SUNRISE: 0711E SUNSET:  1636E WE HAVE SOME PRECIPITATION TO BREAK THE DRY SPELL! The quiet and dry weather pattern has ended, with a trace of snow and 0.03 inches of rain falling by 1 P.M. This has officially broken the week-long dry spell. Today has been foggy for the most part, with light snow in the morning and very light rain beginning in the afternoon hours. Wind is on the lighter side, being completely calm at 1 P.M. The max gust since 7 A.M. is 17 mph. The high temperature so far today is 38F, 5 degrees above the daily normal maximum of 33F. The low since midnight is 31F, 14 degrees above the normal minimum of 17F. PRELIMINARY STATS FOR DECEMBER 2020 TEMPERATURE, Deg. F Avg. Max. 41.1 [+2.0] Avg. Min. 27.2 [+3.6] Mean      34.2 [+2.9] 24-hour corrected mean: 34.0 Max. for month: 62F on the 1st Min. for month: 13F on the 16th and 19th HEATING DEGREE DAYS Total heating units:   957 [-86] Total for the season:  1930 [-375] Total for last season: 2251 PRECIPITATION, Inches Total: 7.32 [+2.43] Greatest in 24 hrs: 2.15 ins. on the 25th SNOWFALL, Inches Total: 19.7 [+6.3] Greatest in 24 hrs: 16.5 ins. on the 16th-17th WIND, mph Avg. uncorrected wind speed: 13.0 mph Avg. corrected wind speed:   13.3 mph Prevailing wind direction:   WNW [17%] Peak gust and direction:     68 SSE on the 25th SUNSHINE: Campbell-Stokes card minutes: 6756 minutes of a possible 16470 or 41% Astronomical total minutes: 6961 minutes of a possible 16991 or 41% Today's Observations: 7 A.M. Weather: Overcast stratus Temperature: 33F; Dew Point: 27F; Relative Humidity: 79% Wind: SSW at 7 kts Sea-level pressure: 29.87 in Hg; rising steadily Visibility: 10 miles, hazy 6-hr Max temp: 33F 6-hr Min temp: 31F 24-hr Precip: 0.00 ins. 24-hr Snow: 0.0 ins. Snow Depth: 0 ins. BHO SA 1155 10 OVC 10 116/33/27/2007/987/ HAZY/ 8/6// 53002 10033 20031 10 A.M. Weather: Overcast stratus, light snow beginning at 9:10 A.M. Temperature: 34F; Dew Point: 32F; Relative Humidity: 65% Wind: W at 7 kts Sea-level pressure: 29.89 in Hg; rising, then more slowly Visibility: 3 miles, fog 3-hr Precip: 0.01 ins. 3-hr Snow: Trace BHO SA 1455 10 OVC 3S-F 123/34/32/2707/989/ S-B10 NEW SNW PST 3 HRS TRACE/ 8/6// 6001 50007 1 P.M. Weather: Overcast stratus and very light rain Temperature: 38F, Dew point: 38F; Relative Humidity: 100% Wind: Calm Sea-level pressure: 29.81 inches Hg, falling steadily Visibility: 1 mile, fog 6-hr Max temp: 38F 6-hr Min temp: 33F 6-hr Precip: 0.03 ins. 6-hr Snow: Trace Snow Depth: 0 ins. BHO SA 1755 10 OVC 1R-F 097/38/38/0000/981/ R-CTD PCPN VRY LGT WND CALM NEW SNW PST 6 HRS TRACE/ 8/6// 6003/ 58026 10038 20033 SUMMARY FOR WEDNESDAY, JANUARY 13, 2021 TEMPERATURE (DEGREES F) MAX.......40   NORMAL.....34 MIN.......26   NORMAL.....17 MEAN......33   NORMAL.....25 DEPARTURE FROM 30-YEAR (1981-2010) NORMAL........+8 TOTAL DEPARTURE FOR THE MONTH...................+77 [+5.7 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............32  DEPARTURE.......-8 TOTAL HEATING UNITS FOR THE MONTH..............432  DEPARTURE......-76 TOTAL HEATING UNITS FOR THE SEASON............2362  DEPARTURE.....-450 TOTAL HEATING UNITS LAST SEASON TO DATE.......2616  DEPARTURE.....-254 PEAK WIND GUST (MPH):                      420C/Official..............15 SW   @  8:11 P.M.                      AEROVANE (south tower).....14 SW   @  6:45 P.M.                      ASOS.......................15 SW   @  6:38 P.M.                      DAVIS #1...................15 WSW  @  6:38 P.M.                      DAVIS #2 (south tower).....16 SW   @  6:50 P.M.                      RMY........................16      @  6:52 P.M.                      VECTOR.....................17      @  6:50 P.M.                      MERLIN.....................N/A FASTEST MILE: CONTACTING ANEMOMETER/OFFICIAL..................11 SW  @  8:10 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................12 SSW @  8:02 P.M. MAXIMUM 2-MINUTE DAVIS #1 AVERAGE...............11 SW  @  6:52 P.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............12 SW  @  7:51 P.M. MAXIMUM 2-MINUTE RMY AVERAGE....................11 SSW @  8:14 P.M. MAXIMUM 2-MINUTE VECTOR AVERAGE.................11     @  7:48 P.M. AVERAGE WIND SPEED AND DIRECTION:                      CONTACTING/OFFICIAL... 6.3 SW  [151 total miles]                      ASOS.................. 7.0     [160 total miles]                      DAVIS #1.............. 6.7 W   [158 total miles]                      DAVIS #2.............. 7.1 WSW [163 total miles]                      RMY................... 6.5 W   [157 total miles]                      VECTOR................ 7.0     [160 total miles] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST): TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.......0.00  DEPARTURE....-0.15                              ASOS.............0.00 TOTAL PRECIPITATION FOR THE MONTH.............0.49  DEPARTURE....-1.36                              ASOS.............0.48 TOTAL PRECIPITATION FOR THE YEAR..............0.49  DEPARTURE....-1.36                               ASOS............0.48 SNOWFALL (INCHES) THROUGH THIS MORNING (EST): TOTAL SNOWFALL 24 HOURS ENDING 7 A.M...........0.0  DEPARTURE.....-0.5 TOTAL SNOWFALL FOR THE MONTH.................. 1.9  DEPARTURE.....-5.4 TOTAL SNOWFALL FOR THE SEASON.................28.1  DEPARTURE.....+4.8 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   62/40/51/+14/0.61/0.0/112/20      60 S    AERO 67 W    RMY 64 12/02   42/32/37/+1/0.00/0.0/301/54       32 SW   AERO 32 SW   RMY 35 12/03   49/30/40/+4/0.00/0.0/512/92       25 SSW  AERO 25 SSW  RMY 28 12/04   58/40/49/+14/0.06/0.0/332/60      35 SSW  AERO 35 SSW  RMY 37 12/05   42/32/37/+2/2.13/2.8/000/00       58 NNW  AERO 58 NNW  RMY 67 12/06   34/26/30/-5/0.01/T/403/73        E44 WNW  AERO 44 WNW  RMY 49 12/07   33/22/28/-6/T/T/457/83            24 NW   AERO 26 NW   RMY 26 12/08   29/22/26/-8/T/T/006/01            24 NW   AERO 25 NW   RMY 28 12/09   34/19/27/-7/T/T/000/00            16 W    AERO 17 W    RMY 19 12/10   42/30/36/+3/0.00/0.0/351/64       30 WNW  AERO 31 WNW  RMY 29 12/11   50/31/41/+8/0.00/0.0/384/70       32 SW   AERO 35 SW   RMY 34 12/12   48/40/44/+11/0.38/0.0/000/00      25 E    AERO 21 E    RMY 25 12/13   58/35/47/+15/0.00/0.0/109/20      28 W    AERO 31 WSW  RMY 31 12/14   35/30/33/+1/0.10/0.4/000/00       25 N    AERO 25 N    RMY 29 12/15   34/21/28/-4/0.00/0.0/541/99       32 WNW  AERO 33 WNW  RMY 38 12/16   27/13/20/-11/0.14/1.4/180/33      38 E    AERO 37 E    RMY 39 12/17   31/19/25/-6/1.58/15.1/000/00      55 ENE  AERO 56 ENE  RMY 59 12/18   27/18/23/-8/0.00/0.0/120/22       28 N    AERO 26 N    RMY 27 12/19   29/13/21/-9/0.00/0.0/436/80       16 SW   AERO 16 S    RMY 16 12/20   36/24/30/0/0.02/T/000/00          14 S    AERO 16 SW   RMY 14 12/21   34/29/32/+2/0.00/0.0/000/00       22 WNW  AERO 24 WNW  RMY 23 12/22   42/30/36/+7/0.00/0.0/447/82       34 WNW  AERO 35 WNW  RMY 38 12/23   37/26/32/+3/0.00/0.0/480/88       30 WNW  AERO 28 WNW  RMY 31 12/24   53/30/42/+13/T/0.0/153/28         46 SSE  AERO 50 SSE  RMY 55 12/25   61/37/49/+21/2.15/0.0/000/00      68 SSE  AERO 77 SSE  RMY 84 12/26   37/25/31/+3/0.00/0.0/485/89       38 SW   AERO 44 SW   RMY 43 12/27   38/22/30/+2/0.00/0.0/513/94       18 W    AERO 18 W    RMY 20 12/28   49/27/38/+10/T/0.0/109/20         35 SSW  AERO 36 -    RMY 37 12/29   38/20/29/+2/0.00/0.0/470/86       48 WNW  AERO 50 WNW  RMY 56 12/30   40/19/30/+3/0.00/0.0/060/11       39 SW   AERO 41 SW   RMY 45 12/31   44/28/36/+9/0.14/0.0/000/00       38 SW   AERO 43 SW   RMY 43 DAILY RECORDS FOR DECEMBER 2020 12/17/20: DAILY RECORD SNOWFALL OF 15.1 INCHES,           BREAKS PREVIOUS RECORD OF 7.5 INCHES SET IN 1988 12/25/20: DAILY RECORD PRECIPITATION OF 2.15 INCHES,           BREAKS PREVIOUS RECORD OF 1.37 INCHES SET IN 2002 PRELIMINARY CLIMATE SUMMARY FOR JANUARY 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 01/01   36/25/31/+4/0.06/0.3/.../..       23 E    AERO 23 NNW  RMY 23 01/02   43/30/37/+10/0.30/T/.../..        37 WNW  AERO 39 WNW  RMY 44 01/03   33/27/30/+4/0.07/0.8/.../..       23 NNE  AERO 22 NNE  RMY 25 01/04   37/28/33/+7/0.01/0.1/.../..       25 NNE  AERO 23 NNE  RMY 27 01/05   31/28/30/+4/0.05/0.7/.../..       21 NNW  AERO 21 NNW  RMY 22 01/06   38/28/33/+7/T/T/.../..            30 NW   AERO 29 NW   RMY 32 01/07   42/26/34/+8/0.00/0.0/.../..       28 NNW  AERO 26 NNW  RMY 31 01/08   40/21/31/+5/0.00/0.0/.../..       25 NNW  AERO 22 NNW  RMY 25 01/09   34/30/27/+1/0.00/0.0/.../..       25 N    AERO 23 N    RMY 24 01/10   39/24/32/+7/0.00/0.0/.../..       25 NNW  AERO 23 NNW  RMY 24 01/11   34/25/30/+5/0.00/0.0/.../..       17 SW   AERO 16 SSW  RMY 16 01/12   40/24/32/+7/0.00/0.0/.../..       23 WNW  AERO 23 WNW  RMY 24 01/13   40/26/33/+8/0.00/0.0/.../..       15 SW   AERO 14 SW   RMY 19 01/14 The low since midnight is 31F, the daily normal low is 17F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JANUARY 14 HIGH 65F IN 1995 LOW -12F IN 1914 PRECIP 1.45 INS. IN 2008 SNOWFALL 10.3 INS. IN 2008 PEAK GUST 68 MPH WNW IN 1976, S IN 2005 RECORDS FOR JANUARY 15 HIGH 64F IN 1995 LOW -16F IN 1957 [RECORD FOR MONTH] PRECIP 2.63 INS. IN 1958 SNOWFALL 8.8 INS. IN 1983 PEAK GUST 69e MPH SE IN 1940 TODAY'S REPORT PREPARED BY: Benjamin Turner