BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, OCTOBER 24, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME A MILD, DRY, AND FAIR FALL DAY ATOP GREAT BLUE HILL.... We observed 75 miles of visibility throughout the day, along with dew points in the low 30's. Skies have been almost clear, save a few distant cirrostratus. Wind is steady southwesterly, blowing at around 10 mph. The max gust so far today is 21 mph. With both the abundant sunshine and some warm air advection from the southwest, temperatures are warmer than seasonal averages. The high so far today is 66F, 8 degrees above the daily normal maximum of 58F. The low since midnight is 45F, 5 degrees above the normal low of 40F. Today's Observations: 7 A.M. Weather: Clear, few distant cirrostratus Temperature: 45F; Dew Point: 33F; Wind: SW at 8 kts Sea-level pressure: 30.29 ins. Hg, rising steadily Visibility: 75 miles 6-hr Max temp: 47F 6-hr Min temp: 43F 24-hour Precip.: 0.02 in. BHO SA 1155 CLR 75 256/45/33/2408/029/ FEW DSNT CS ALQDS/ 8/005 70002 53020 10047 20043 10 A.M. Weather: Clear, few distant cirrostratus Temperature: 58F; Dew Point: 34F; Wind: SW at 8 kts Sea-level pressure: 30.32 ins. Hg, falling then rising Visibility: 75 miles 3-hour Precip.: 0.00 in. BHO SA 1455 CLR 75 264/58/34/2408/032/ FEW DSNT CS ALQDS/ 8/005 51008 1 P.M. Weather: Clear, few distant cirrostratus Temperature: 66F; Dew Point: 34F; Wind: SSW at 10 kts Sea-level pressure: 30.25 ins. Hg, falling, then more quickly Visibility: 75 miles 6-hr Max temp: 66F 6-hr Min temp: 45F BHO SA 1755 CLR 75 243/66/34/2110/025/ FEW DSNT CS ALQDS/ 8/005 58021 10066 20045 SUMMARY FOR WEDNESDAY, OCTOBER 23, 2019 TEMPERATURE (DEGREES F) MAX.....65   NORMAL.....58 MIN.....48   NORMAL.....40 MEAN....57   NORMAL.....49 DEPARTURE FROM 30-YEAR NORMAL.....................+8 TOTAL DEPARTURE FOR THE MONTH....................+18 [+0.6 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY................8  DEPARTURE.........-8 TOTAL HEATING UNITS FOR THE MONTH..............261  DEPARTURE........-22 TOTAL HEATING UNITS FOR THE SEASON.............354  DEPARTURE........-71 TOTAL HEATING UNITS LAST SEASON TO DATE........360  DEPARTURE.........-6 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY................0  DEPARTURE..........0 TOTAL COOLING UNITS FOR THE MONTH................2  DEPARTURE.........-3 TOTAL COOLING UNITS FOR THE SEASON.............682  DEPARTURE........+80 TOTAL COOLING UNITS LAST SEASON TO DATE........874  DEPARTURE.......-192 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................35 W   AT  3:13 P.M.                      AERO.........................35 W   AT  3:08 P.M.                    ASOS.........................35 W   AT  2:12 P.M.                    DAVIS........................36 W   AT  2:10 P.M. RMY 36 FASTEST MILE FOR YESTERDAY......................31 W   AT  2:12 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................26 W   AT  2:13 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................29 W   AT  2:11 P.M. AVERAGE WIND SPEED AND DIRECTION...............13.1 W                    ASOS........................12.8                      DAVIS.......................13.5 W [278 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.02  DEPARTURE......-0.14                          ASOS..............0.06 TOTAL PRECIPITATION FOR THE MONTH..........5.04  DEPARTURE......+1.59                          ASOS..............5.30 TOTAL PRECIPITATION FOR THE YEAR..........43.46  DEPARTURE......+0.92                          ASOS.............43.53 PRELIMINARY CLIMATE SUMMARY FOR OCTOBER CALENDAR DAY DATA DATE: MAX/MIN/MEAN/DEP/PRECIP/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 10/01  67/52/60/+3/0.06/.../..               28 SW  AERO 25 SSW RMY 29 10/02  74/49/62/+5/0.42/.../..               30 ENE AERO 25 ENE RMY 28 10/03  51/46/49/-7/..../.../..               28 ENE AERO 26 ENE RMY N/A 10/04  59/40/50/-6/..../.../..               38 NNW AERO 38 NNW RMY 38 10/05  58/35/47/-9/0.00/.../..               21 N   AERO 18 SSW RMY N/A 10/06  65/44/55/0/0.00/.../..                36 SSW AERO 35 SSW RMY N/A 10/07  77/57/67/+12/0.12/.../..              47 SSW AERO 46 SSW RMY 49 10/08  60/52/56/+2/T/.../..                  22 NE  AERO 18 NW  RMY N/A 10/09  55/49/52/-2/..../.../..               43 NE  AERO 37 NE  RMY 44 10/10  54/47/51/-3/..../.../..               41 NE  AERO 37 NE  RMY 42 10/11  52/48/50/-3/..../000/00               41 NE  AERO 39 NE  RMY 41 10/12  52/49/51/-2/..../.../..               39 NE  AERO 37 NE  RMY N/A 10/13  66/48/57/+4/..../.../..               18 WNW AERO 17 WNW RMY 18 10/14  67/51/59/+7/..../.../..               18 WSW AERO 17 WSW RMY N/A 10/15  61/43/52/0/..../.../..                18 NNW AERO 17 NNW RMY N/A 10/16  61/45/53/+2/..../.../..               58 ESE AERO 58 ESE RMY N/A 10/17  60/46/53/+2/..../.../..               61 E   AERO 63 E   RMY N/A 10/18  57/41/49/-2/..../.../..               29 WNW AERO 32 W   RMY 32 10/19  58/36/47/-3/..../.../..               18 NW  AERO 18 NW  RMY 19 10/20  60/43/52/+2/T/.../..                  14 NE  AERO 16 NE  RMY N/A 10/21  59/49/54/+4/0.01/.../..               25 E   AERO 21 NE  RMY 23 10/22  58/47/53/+4/..../.../..               29 E   AERO 28 E   RMY 23 10/23  65/48/57/+8/..../.../..               35 W   AERO 35 W   RMY 36 10/24 The low since midnight is 43F, normal daily minimum is 40F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR OCTOBER 24 HIGH 79F IN 1963 LOW 22F IN 1969 PRECIP 2.96 INCHES IN 1890 SNOWFALL 1.8 INCHES IN 1960 PEAK GUST 70 MPH SE IN 1959 RECORDS FOR OCTOBER 25 HIGH 81F IN 1963 LOW 26F IN 1922,1939 PRECIP 2.45 INCHES IN 2005 SNOWFALL 1.2 INCHES IN 1960 PEAK GUST 72 MPH ESE IN 1980 TODAY'S REPORT PREPARED BY: Benjamin Turner