BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, JANUARY 4, 2020 ALL TIMES ARE IN EASTERN STANDARD TIME MILD, BUT DAMP AND RAW AT THE OBSERVATORY TODAY.... Overcast skies has been the theme once again today with no sunshine to speak of. Light rain and drizzle have been occuring most of the day, but hasn't amounted to too much. 0.07" of rain has been measured through 1 P.M. Wind has been quite light yet again today out of the east. The low since midnight is 40F, 22 degrees above the normal low of 18F. The high so far today is 46F, 12 degrees above the daily normal maximum of 34F. Today's Observations: 7 A.M. Weather: Overcast altostratus, few stratocumulus N-NE Temperature: 46F; Dew Point: 37F; Wind: ENE at 6 kts Sea-level pressure: 29.73 ins. Hg, falling, then rising Visibility: 20 miles, hazy 6-hr Max temp: 46F 6-hr Min temp: 42F 24-hr Precip:  Trace 24-hr Snowfall: 0.0 ins. BHO SA 1155 E65 OVC 20 068/46/37/0706/973/ FEW SC N-NE THN K LYR ALNG HRZN ALQDS WND LGT HAZY/ 8/55/ 55007 6000 70000 10046 20042 10 A.M. Weather: Overcast stratus, light drizzle Temperature: 44F; Dew Point: 41F; Wind: E at 4 kts Sea-level pressure: 29.69 ins. Hg, rising, then falling Visibility: 2 miles, fog 3-hr Precip:   Trace 3-hr Snowfall: 0.0 ins. BHO SA 1455 E25 OVC 2L-F 054/44/41/0904/969/ WND LGT/ 8/7// 58014 6000 1 P.M. Weather: Vertical visibility 200 ft, sky obscurded, light rain Temperature: 40F; Dew Point: 40F; Wind: E at 6 kts Sea-level pressure: 29.58 ins. Hg, falling, then more slowly Visibility: 1/16 miles, fog 6-hr Max temp: 40F 6-hr Min temp: 40F 6-hr Precip:  0.07 ins. 6-hr Snowfall: 0.0 ins. BHO SA 1755 W2 X 1/16R-F 017/40/40/0806/958/ WND LGT/ 8/7// 56037 6007 10046 20040 SUMMARY FOR FRIDAY, JANUARY 3, 2020 TEMPERATURE (DEGREES F) MAX.....46   NORMAL.....35 MIN.....40   NORMAL.....18 MEAN....43   NORMAL.....26 DEPARTURE FROM 30-YEAR NORMAL.....................+17 TOTAL DEPARTURE FOR THE MONTH.....................+35 [+11.5 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............22  DEPARTURE.......-17 TOTAL HEATING UNITS FOR THE MONTH...............80  DEPARTURE.......-35 TOTAL HEATING UNITS FOR THE SEASON............2331  DEPARTURE.......-89 TOTAL HEATING UNITS LAST SEASON TO DATE.......2384  DEPARTURE.......-53 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................21 SW  AT 12:26 A.M.                      AERO.........................18 SW  AT 12:28 A.M.                      ASOS.........................23 SW  AT 12:26 A.M.                    DAVIS........................22 SW  AT 12:41 A.M. RMY N/A FASTEST MILE FOR YESTERDAY......................18 SW  AT 12:22 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................18 SSW AT 12:26 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................17 SW  AT 12:31 A.M. AVERAGE WIND SPEED AND DIRECTION.............. 8.9 SW                                      ASOS....................... 8.9                    DAVIS...................... 9.0 SW [235 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M...Trace  DEPARTURE......-0.14                          ASOS..............0.01 TOTAL PRECIPITATION FOR THE MONTH.........Trace  DEPARTURE......-0.44                          ASOS..............0.01 TOTAL PRECIPITATION FOR THE YEAR..........Trace  DEPARTURE......-0.44                          ASOS..............0.01 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.......-0.6 TOTAL SNOWFALL FOR THE MONTH................0.0  DEPARTURE.......-1.7 TOTAL SNOWFALL FOR THE SEASON..............20.0  DEPARTURE.......+2.3 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  32/16/24/-13/..../5.8/011/02           33 ENE AERO 32 ENE RMY N/A 12/02  37/25/31/-5/..../2.7/000/00            52 NE  AERO 47 NE  RMY 53 12/03  30/23/27/-9/..../4.6/000/00            32 N   AERO 35 N   RMY 36 12/04  34/22/28/-7/..../0.0/000/00            23 WNW AERO 23 NNW RMY N/A 12/05  41/26/34/-1/..../0.0/343/62            33 NW  AERO 35 NW  RMY 37 12/06  33/23/28/-7/0.02/0.1/000/00            25 NW  AERO 23 NW  RMY 29 12/07  31/18/25/-9/0.00/0.0/519/94            25 NW  AERO 23 NW  RMY N/A 12/08  36/15/26/-8/0.00/0.0/402/73            31 SSW AERO 32 SSW RMY N/A 12/09  57/36/47/+13/..../0.0/000/00           53 S   AERO 52 S   RMY 54 12/10  58/37/48/+15/..../0.0/044/08           35 SW  AERO 39 SW  RMY N/A 12/11  36/23/30/-3/..../3.0/236/43            25 NW  AERO 25 NW  RMY N/A 12/12  29/17/23/-10/..../1.8/488/89           29 W   AERO 30 W   RMY 25 12/13  46/22/34/+2/..../0.0/000/00            25 SSE AERO 25 SSE RMY N/A 12/14  58/46/52/+20/..../0.0/000/00           45 S   AERO 41 S   RMY N/A 12/15  48/28/38/+6/0.00/0.0/284/52            53 W   AERO 53 W   RMY 50 12/16  30/25/28/-3/0.00/0.0/000/00            36 W   AERO 36 W   RMY N/A 12/17  35/23/29/-2/..../1.0/000/00            22 NNW AERO 21 NE  RMY 23 12/18  33/18/26/-5/.../0.0/229/42             44 WNW AERO 45 WNW RMY N/A 12/19  20/9/15/-15/.../0.0/534/98             51 W   AERO 47 W   RMY N/A 12/20  29/11/20/-10/0.00/0.0/540/99           32 W   AERO 30 W   RMY 29 12/21  31/16/24/-6/0.00/0.0/163/30            16 SSE AERO 15 SSE RMY N/A 12/22  40/26/33/+4/0.00/0.0/..../..           23 SW  AERO 21 SW  RMY 23 12/23  54/33/44/+15/0.00/0.0/..../..          30 WSW AERO 30 SW  RMY 30 12/24  42/29/36/+7/0.00/0.0/..../..           30 NW  AERO 27 NW  RMY 30 12/25  42/25/34/+6/0.00/0.0/..../..           16 NNE AERO 16 N   RMY N/A 12/26  39/29/34/+6/0.00/0.0/..../..           22 ENE AERO 20 ENE RMY 22 12/27  47/31/39/+11/0.00/0.0/..../..          32 SSW AERO 30 SSW RMY 34 12/28  47/30/39/+11/0.00/0.0/..../..          23 W   AERO 22 W   RMY N/A 12/29  42/28/35/+8/..../0.0/..../..           22 WNW AERO 21 WNW RMY 23 12/30  36/32/34/+7/..../0.8/..../..           40 E   AERO 37 E   RMY 37 12/31  40/32/36/+9/..../0.0/..../..           35 E   AERO 32 E   RMY N/A     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  38/30/34/+7/..../0.0/..../..           39 W   AERO 38 W   RMY 41 01/02  46/29/38/+11/0.00/0.0/..../..          28 SW  AERO 28 SW  RMY 30 01/03  46/40/43/+17/0.00/0.0/..../..          21 SW  AERO 18 SW  RMY N/A 01/04  The low since midnight is 40F, daily normal minimum is 18F DAILY RECORDS FOR DECEMBER 12/01/19: DAILY RECORD SNOWFALL OF 5.8 INS.,           BREAKS PREVIOUS RECORD OF 2.0 INS. SET IN 1902. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):   RECORDS FOR JANUARY 4 HIGH 60F IN 2000 LOW -8F IN 1904, 1981 PRECIP 1.79 INS. IN 1982 SNOW 16.5 INS. IN 2018 PEAK GUST 84 MPH S IN 1982 RECORDS FOR JANUARY 5 HIGH 61F IN 2007 LOW -9F IN 1981 PRECIP 1.15 INS. IN 2019 SNOW 4.5 INS. IN 1891 PEAK GUST 70 MPH WNW IN 1959 TODAY'S REPORT PREPARED BY: Matt Douglas