BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, JANUARY 24, 2020 ALL TIMES ARE IN EASTERN STANDARD TIME FILTERED SUNSHINE AND MILD TEMPERATURES ATOP GREAT BLUE HILL.... We observed persistent haze throughout the day resulting in a max visibility of only 35 miles. A light north-northeasterly flow resulted in mild temperatures peaking so far at 43 degrees, thus the snow depth fell to 1 inch by the 1PM observation. Sunshine was radiant at times and obscured at others as mid and high altitude clouds filtered in and out of our region. The high so far today is 43F, 9 degrees above the normal high of 34F. The low since midnight is 31F, 14F degrees above the normal low of 17F. Today's Observations: 7 A.M. Weather: Broken Altocumulus and Altostratus; Few Cirrus Temperature: 31F; Dew Point: 21F; Wind: NE at 9 kts Sea-level pressure: 30.38 ins. Hg, rising unsteadily Visibility: 35 miles, hazy 6-hr Max temp: 34F 6-hr Min temp: 31F 24-hr Precip:  0.00 ins. 24-hr Snowfall: 0.0 ins. Snow depth: 2 ins. BHO SA 1155 E140 BKN 35 287/31/21/0409/038/ FEW CI ALQDS HAZY/ 8/074 4/002 52016 10034 20031 10 A.M. Weather: Scattered Cirrus; Few Altostratus SW-NW; Few Cirrostratus NE-SW Temperature: 38F; Dew Point: 27F; Wind: NNE at 6 kts Sea-level pressure: 30.44 ins. Hg, rising then falling Visibility: 35 miles, hazy 3-hr Precip:  0.00 ins. 3-hr Snowfall: 0.0 ins. BHO SA 1455 220 SCT 35 307/38/27/0206/044/ FEW AS SW-NW FEW CS NE-SW HAZY/ 8/071 51020 1 P.M. Weather: Broken Cirrus, Few Stratus Fractus NW-NE, Few Altocumulus and Altostratus Temperature: 43F; Dew Point: 33F; Wind: NNE at 9 kts Wind: Light and variable Sea-level pressure: 30.42 ins. Hg, steady then falling Visibility: 35 miles 6-hr Max temp: 43F 6-hr Min temp: 31F 6-hr Precip:  0.00 ins. 6-hr Snowfall: 0.0 ins. Snow depth: 1 ins BHO SA 1755 E250 BKN 35 300/43/33/0309/042/ FEW SF NW-NE FEW AC/AS HAZY WND L/V/ 8/792 4/001 58007 10043 20031 SUMMARY FOR THURSDAY, JANUARY 23, 2020 TEMPERATURE (DEGREES F) MAX.....46   NORMAL.....34 MIN.....26   NORMAL.....17 MEAN....36   NORMAL.....25 DEPARTURE FROM 30-YEAR NORMAL.....................+11 TOTAL DEPARTURE FOR THE MONTH....................+166 [+7.0 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............29  DEPARTURE...... -11 TOTAL HEATING UNITS FOR THE MONTH..............743  DEPARTURE......-166 TOTAL HEATING UNITS FOR THE SEASON............2994  DEPARTURE......-219 TOTAL HEATING UNITS LAST SEASON TO DATE.......3188  DEPARTURE......-194 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................21 SW  AT  11:42 A.M.                      AERO.........................20 SW  AT   7:01 A.M.                      ASOS.........................20 SW  AT   6:54 A.M.                    DAVIS........................20 WSW AT   7:04 A.M. RMY 19 FASTEST MILE FOR YESTERDAY......................16 SW  AT   6:59 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................16 SW  AT   7:11 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................16 SW  AT   6:59 A.M. AVERAGE WIND SPEED AND DIRECTION...............10.5 SW                                    ASOS........................11.0                    DAVIS.......................10.6 WSW [237 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..........0.89  DEPARTURE......-2.37                          ASOS..............0.92 TOTAL PRECIPITATION FOR THE YEAR...........0.89  DEPARTURE......-2.37                          ASOS..............0.92 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M......... 0.0  DEPARTURE.......-0.5 TOTAL SNOWFALL FOR THE MONTH............... 4.2  DEPARTURE.......-8.6 TOTAL SNOWFALL FOR THE SEASON..............24.2  DEPARTURE.......-4.6 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  33/23/28/+2/T/T/..../..                26 W   AERO 21 W   RMY N/A 01/07  38/29/34/+8/..../0.4/.../..            30 WSW AERO 28 WSW RMY N/A 01/08  39/22/31/+5/..../0.4/.../..            50 W   AERO 46 WNW RMY 47 01/09  28/16/22/-4/..../0.0/.../..            43 WNW AERO 40 WNW RMY N/A 01/10  48/23/36/11/T/..../0.0/.../..          37 SW  AERO 37 SW  RMY 39 01/11  65/46/56/+31/..../0.0/.../..           53 SSW AERO 53 SSW RMY N/A           01/12  68/36/52/+27/..../0.0/.../..           60 SSW AERO 62 SSW RMY N/A 01/13  39/31/35/+10/0.01/T/.../..             21 NE  AERO 20 NE  RMY N/A 01/14  38/31/35/+10/0.01/0.0/.../..           16 W   AERO 15 W   RMY N/A 01/15  48/35/42/+17/0.00/0.0/.../..           24 W   AERO 23 W   RMY 24 01/16  42/24/33/+8/0.06/T/.../..              54 W   AERO 52 W   RMY 59     01/17  24/10/17/-8/0.00/0.0/..../..           50 NW  AERO 48 NW  RMY N/A 01/18  28/8/18/-7/0.35/2.8/..../..            28 WSW AERO 24 ESE RMY N/A 01/19  40/21/31/+6/0.02/0.2/..../..           44 W   AERO 44 W   RMY 42 01/20  26/12/19/-6/0.00/0.0/..../..           33 NW  AERO 32 NW  RMY N/A 01/21  24/10/17/-8/0.00/0.0/..../..           22 NW  AERO 21 NW  RMY N/A 01/22  34/13/24/-1/0.00/0.0/..../..           16 SW  AERO 16 SW  RMY N/A 01/23  46/26/36/+11/0.00/0.0/..../..          21 SW  AERO 20 SW  RMY 19 1/24 The low since midnight is 31F, daily normal minimum is 17F DAILY RECORDS FOR JANUARY 1/11/20: DAILY RECORD MAXIMUM TEMPERATURE OF 65F,           BREAKS PREVIOUS RECORD OF 60F SET IN 1975. 1/11/20: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 46F,           BREAKS PREVIOUS RECORD OF 40F SET IN 1983. 1/12/20: DAILY RECORD MAXIMUM TEMPERATURE OF 68F,           BREAKS PREVIOUS RECORD OF 60 SET IN 2018.          TIES HIGHEST MAXIMUM FOR JANUARY,           ADDITIONAL 68F ON 1/26/1950. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):   RECORDS FOR JANUARY 24 HIGH 60F IN 1967 LOW -12F IN 1907 PRECIP 2.04 INS. IN 1998 SNOWFALL 11.3 INS. IN 1935 PEAK GUST 82 MPH S IN 1996 RECORDS FOR JANUARY 25 HIGH 56F IN 2010 LOW -10F IN 1935 PRECIP 2.24 INS. IN 1979 SNOWFALL 12.5 INS. IN 1941 PEAK GUST 81 MPH WNW IN 1972 TODAY'S REPORT PREPARED BY: Ann Murphy and Andrew Swanson