BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, JANUARY 6, 2020 ALL TIMES ARE IN EASTERN STANDARD TIME PERIOD OF LIGHT SNOW HAS DEVELOPED INTO EARLY THIS AFTERNOON... After a bit of sun this morning, clouds have once again over- spread the area bringing with them some light snow, as a cold front approaches the region. So far the snow hasn't amounted to anything more than a dusting. After a busy wind day yesterday, today is the total opposite with speeds of 12 mph or less most of the day. Today has definitely been the coldest day in about 2 weeks with a high so far of only 33F. This is 1 degree below the daily normal maximum of 34F. The low since midnight is 23F, which is 5 degrees above the normal low of 18F. Today's Observations: 7 A.M. Weather: Overcast altocumulus, stratocumulus offshore distant NNE-ESE Temperature: 25F; Dew Point: 14F; Wind: SE at 3 kts Sea-level pressure: 29.94 ins. Hg, falling then rising Visibility: 60 miles 6-hr Max temp: 25F 6-hr Min temp: 23F 24-hr Precip:  0.00 ins. 24-hr Snowfall: 0.0 ins. BHO SA 1155 E80 OVC 60 139/25/14/1303/994/ FEW BINOVC N-E AND SE SC OFFSHR DSNT NNE-ESE WND LGT/ 8/57/ 53005 10025 20023 10 A.M. Weather: Broken altocumulus, broken cirrus Temperature: 32F; Dew Point: 19F; Wind: S at 5 kts Sea-level pressure: 29.96 ins. Hg, rising then falling Visibility: 50 miles, 20 miles to the SW, 30 to the W-NW 3-hr Precip:  0.00 ins. 3-hr Snowfall: 0.0 ins. BHO SA 1455 E65 BKN 250 BKN 50 144/32/19/1805/996/ SNW SHWRS SW-W MVG E VSBY SW 20 W-WNW 30 WND LGT/ 8/071 50005 1 P.M. Weather: Overcast stratus, light snow Temperature: 32F; Dew Point: 20F; Wind: SSW at 8 kts Sea-level pressure: 29.90 ins. Hg, falling, then more slowly Visibility: 10 miles 6-hr Max temp: 33F 6-hr Min temp: 25F 6-hr Precip:   Trace 6-hr Snowfall: Trace BHO SA 1755 E20 OVC 10S- 125/32/20/2008/990/ TOTAL NEW SNW LAST 6 HRS TRACE/ 8/6// 56019 6000 10033 20025 SUMMARY FOR SUNDAY, JANUARY 5, 2020 TEMPERATURE (DEGREES F) MAX.....36   NORMAL.....34 MIN.....24   NORMAL.....18 MEAN....30   NORMAL.....26 DEPARTURE FROM 30-YEAR NORMAL..................... +4 TOTAL DEPARTURE FOR THE MONTH.....................+54 [+10.6 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............35  DEPARTURE....... -4 TOTAL HEATING UNITS FOR THE MONTH..............139  DEPARTURE.......-54 TOTAL HEATING UNITS FOR THE SEASON............2390  DEPARTURE......-107 TOTAL HEATING UNITS LAST SEASON TO DATE.......2440  DEPARTURE.......-50 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................43 NW  AT 11:43 A.M.                      AERO.........................46 NW  AT 11:43 A.M.                      ASOS.........................44 NW  AT 11:41 A.M.                    DAVIS........................43 WNW AT 11:26 A.M. RMY 43 FASTEST MILE FOR YESTERDAY......................34 NW  AT 11:42 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................30 NW  AT 11:48 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................34 WNW AT 11:45 A.M. AVERAGE WIND SPEED AND DIRECTION..............16.4 NW                                    ASOS.......................15.4                    DAVIS......................16.1 NW [309 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..........0.30  DEPARTURE......-0.42                          ASOS..............0.31 TOTAL PRECIPITATION FOR THE YEAR...........0.30  DEPARTURE......-0.42                          ASOS..............0.31 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.......-0.6 TOTAL SNOWFALL FOR THE MONTH................0.5  DEPARTURE.......-2.3 TOTAL SNOWFALL FOR THE SEASON..............20.5  DEPARTURE.......+1.7 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  46/36/41/+15/..../0.0/..../..          16 NNW AERO 16 NNW RMY N/A 01/05  36/24/30/+4/..../0.5/..../..           43 NW  AERO 46 NW  RMY 43 01/06  The low since midnight is 23F, 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 6 HIGH 66F IN 2007 LOW -14F IN 1896 PRECIP 3.10 INS. IN 1889 [RECORD FOR MONTH] SNOWFALL 7.5 INS. IN 1893 PEAK GUST 70 MPH WNW IN 1959 RECORDS FOR JANUARY 7 HIGH 60F IN 1930 LOW -8F IN 2018 PRECIP 1.97 INS. IN 1977 SNOWFALL 16.0 INS. IN 1977 PEAK GUST 74 MPH NW IN 1968 TODAY'S REPORT PREPARED BY: Matt Douglas