BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, DECEMBER 28, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME MILD, WITH FAIR WEATHER AND A COOL NORTH WESTERLY BREEZE.... We observed our 10th consecutive day without measurable precipitation, continuing our longest dry stretch of the year. Skies were mostly clear from the 10 A.M. observation onward, a difference from the cloudier skies earlier this morning. Visibility was limited to 35 miles at 7 A.M. due to a distant fog, but increased to an excellent 85 miles by 1 P.M. Wind has been northwesterly at an average of 10 mph, with a peak gust so far today around 20 mph. The high so far today is 47F, which is 11 degrees above the daily normal maximum of 36F. The low since midnight is 35F, which is 15 degrees above the normal minimum of 20F. Today's Observations: 7 A.M. Weather: Broken altocumulus and cirrostratus Temperature: 36F; Dew Point: 32F; Wind: WNW at 10 kts Sea-level pressure: 30.09 ins. Hg, rising steadily Visibility: 35 miles, distant fog 6-hr Max temp: 42F 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 250 BKN 35 191/36/32/3010/009/ DSNT FG ALQDS/ 8/085 53014 10042 20035 10 A.M. Weather: Scattered cirrostratus, few cumulus Temperature: 42F; Dew Point: 33F; Wind: WNW at 10 kts Sea-level pressure: 30.15 ins. Hg, falling, then rising Visibility: 80 miles 3-hr Precip:  0.00 ins. 3-hr Snowfall: 0.0 ins. BHO SA 1455 250 SCT 80 211/42/33/3010/015/ FEW CU ALQDS/ 8/105 50020 1 P.M. Weather: Scattered cirrostratus, few cumulus Temperature: 45F; Dew Point: 30F; Wind: W at 10G15 kts Sea-level pressure: 30.12 ins. Hg, falling, then falling more slowly Visibility: 85 miles 6-hr Max temp: 47F 6-hr Min temp: 36F 6-hr Precip:  0.00 ins. 6-hr Snowfall: 0.0 ins. Snow Depth: 0 ins. BHO SA 1755 250 SCT 85 202/45/30/2810G15/012/ FEW CU ALQDS/ 8/108 56009 10047 20036 SUMMARY FOR FRIDAY, DECEMBER 27, 2019 TEMPERATURE (DEGREES F) MAX.....47   NORMAL.....36 MIN.....31   NORMAL.....20 MEAN....39   NORMAL.....28 DEPARTURE FROM 30-YEAR NORMAL.....................+11 TOTAL DEPARTURE FOR THE MONTH.....................-8 [-0.5 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............26  DEPARTURE.......-11 TOTAL HEATING UNITS FOR THE MONTH..............898  DEPARTURE........+6 TOTAL HEATING UNITS FOR THE SEASON............2135  DEPARTURE.......-19 TOTAL HEATING UNITS LAST SEASON TO DATE.......2182  DEPARTURE.......-47 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................32 SSW AT  11:11 A.M.                      AERO.........................30 SSW AT  11:01 A.M.                      ASOS.........................34 SSW AT  11:10 A.M.                    DAVIS........................36 SSW AT  11:05 A.M. RMY 34 FASTEST MILE FOR YESTERDAY......................25 SSW AT  11:10 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................25 SSW AT  11:10 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................24 SSW AT  11:08 A.M. AVERAGE WIND SPEED AND DIRECTION..............14.9 S                                      ASOS.......................15.2                    DAVIS......................14.7 SSW [211 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.14                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........6.06  DEPARTURE......+1.73                          ASOS..............6.51 TOTAL PRECIPITATION FOR THE YEAR..........55.14  DEPARTURE......+2.27                          ASOS.............55.91 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.......-0.5 TOTAL SNOWFALL FOR THE MONTH...............19.1  DEPARTURE.......+7.9 TOTAL SNOWFALL FOR THE SEASON..............19.2  DEPARTURE.......+5.4 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  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/.../..            31 SSW AERO 32 SSW RMY N/A 12/09  57/36/47/+13/..../0.0/.../..           53 S   AERO 52 S   RMY 54 12/10  58/37/48/+15/..../0.0/.../..           35 SW  AERO 39 SW  RMY N/A 12/11  36/23/30/-3/..../3.0/.../..            25 NW  AERO 25 NW  RMY N/A 12/12  29/17/23/-10/..../1.8/.../..           29 W   AERO 30 W   RMY 25 12/13  46/22/34/+2/..../0.0/.../..            25 SSE AERO 25 SSE RMY N/A 12/14  58/46/52/+20/..../0.0/.../..           45 S   AERO 41 S   RMY N/A 12/15  48/28/38/+6/0.00/0.0/.../..            53 W   AERO 53 W   RMY 50 12/16  30/25/28/-3/0.00/0.0/.../..            36 W   AERO 36 W   RMY N/A 12/17  35/23/29/-2/..../1.0/.../..            22 NNW AERO 21 NE  RMY 23 12/18  33/18/26/-5/.../0.0/.../..             44 WNW AERO 45 WNW RMY N/A 12/19  20/9/15/-15/.../0.0/.../..             51 W   AERO 47 W   RMY N/A 12/20  29/11/20/-10/0.00/0.0/..../..          32 W   AERO 30 W   RMY 29 12/21  31/16/24/-6/0.00/0.0/..../..           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 The low since midnight is 35F, daily normal minimum is 20F 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 DECEMBER 28 HIGH 60 IN 1982 LOW -2 IN 1933 PRECIP 2.16 INS. IN 1967 SNOWFALL 9.5 INS. IN 1967 PEAK GUST 89 MPH SSE IN 1983 RECORDS FOR DECEMBER 29 HIGH 72 IN 1984 LOW -19 IN 1933 (RECORD FOR DECEMBER) PRECIP 1.91 INS. IN 1945 SNOWFALL 18.4 INS. IN 1945 PEAK GUST 95 MPH S IN 1966 (RECORD FOR DECEMBER) TODAY'S REPORT PREPARED BY: Benjamin Turner