BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY WEDNESDAY, OCTOBER 30, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME A FOGGY START WITH SOME AFTERNOON CLEARING, THEN MORE FOG.... This morning, the observatory experienced a fog that brought visibility down to a 1/16th mile. However, some clearing this morning exposed partly cloudy skies, and a visibility up to almost 40 miles at 10 A.M. Since then, fog rolled in from the east, and we are back in the fog around 2 P.M. Wind has remained light and southerly, with a max gust so far barely over 10 mph. A whole 1/100th inch fell yesterday between 7 and 10 yesterday, bringing the monthly rain total to 6.56 inches. That is 2.18 inches above the normal total of 4.38 inches. Despite abundant cloud cover and light winds, temperatures held above seasonal averages. The high so far today is 66F, 10 degrees above the daily normal maximum of 56F. The low since midnight is 51F, 13 degrees above the normal minimum of 38F. Today's Observations: 7 A.M. Weather: Fog Temperature: 53F; Dew Point: 53F; Wind: S at 4 kts, Wind: Light and variable Sea-level pressure: 30.33 ins. Hg, rising, then more rapidly Visibility: 1/16th mile, fog 6-hr Max temp: 53F 6-hr Min temp: 51F 24-hr Precip: 0.01 ins. BHO SA 1155 X W3 1/16F 270/53/53/1804/033/ WND L/V/ 8//// 70001 53009 10053 20051 10 A.M. Weather: Scattered stratocumulus and cirrus Temperature: 60F; Dew Point: 57F; Wind: S at 6 kts, Wind: Light Sea-level pressure: 30.33 ins. Hg, steady Visibility: 35 miles, distant fog 3-hr Precip: 0.00 ins. BHO SA 1455 15 SCT 250 SCT 35 270/60/57/1806/033/ DSNT FG ALQDS WND LGT/ 8/802 50000 1 P.M. Weather: Overcast stratocumulus Temperature: 65F; Dew Point: 57F; Wind: S at 5 kts, Wind: Light Sea-level pressure: 30.28 ins. Hg, falling steadily Visibility: 30 miles, except 15 miles N-ENE due to an offshore fog bank 6-hr Max temp: 65F 6-hr Min temp: 53F 6-hr Precip: 0.00 ins. BHO SA 1755 E25 OVC 30 253/65/57/1805/028/ DSNT FG OFFSHR VSBY 15 N-ENE WND LGT/ 8/8// 58017 10065 20053 SUMMARY FOR TUESDAY, OCTOBER 29, 2019 TEMPERATURE (DEGREES F) MAX.....54   NORMAL.....56 MIN.....47   NORMAL.....39 MEAN....51   NORMAL.....47 DEPARTURE FROM 30-YEAR NORMAL.....................+4 TOTAL DEPARTURE FOR THE MONTH....................+42 [+1.2 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............14  DEPARTURE.........-4 TOTAL HEATING UNITS FOR THE MONTH..............338  DEPARTURE........-47 TOTAL HEATING UNITS FOR THE SEASON.............431  DEPARTURE........-96 TOTAL HEATING UNITS LAST SEASON TO DATE........497  DEPARTURE........-66 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....................15 ESE  AT  9:33 A.M.                      AERO.........................15 ESE  AT  9:33 A.M.                    ASOS.........................14 ESE  AT 10:10 A.M.                    DAVIS........................15 ESE  AT  9:31 A.M. RMY 14 FASTEST MILE FOR YESTERDAY.......................9 ESE  AT  9:33 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................10 SE   AT  9:12 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................11 ESE  AT  9:33 A.M. AVERAGE WIND SPEED AND DIRECTION................4.8 ESE                    ASOS.........................5.3                    DAVIS........................5.3 SE [141 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.01  DEPARTURE......-0.15                          ASOS..............0.01 TOTAL PRECIPITATION FOR THE MONTH..........6.56  DEPARTURE......+2.18                          ASOS..............6.89 TOTAL PRECIPITATION FOR THE YEAR..........44.98  DEPARTURE......+1.51                          ASOS.............45.12 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  67/43/55/+6/.../.../..                28 SSW AERO 28 SSW RMY 29 10/25  64/47/56/+7/.../.../..                20 WSW AERO 21 SW  RMY N/A 10/26  58/45/52/+4/.../.../..                20 N   AERO 18 N   RMY N/A 10/27  52/45/49/+1/1.43/.../..               37 ESE AERO 35 ESE RMY 37 10/28  53/46/50/+2/.../.../..                24 NNW AERO 24 NNW RMY N/A 10/29  54/47/51/+4/..../.../..               15 ESE AERO 15 ESE RMY 14 10/30 The low since midnight is 51F, normal daily minimum is 38F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR OCTOBER 30 HIGH 75F IN 1946,1989 LOW 21F IN 1928 PRECIP 1.85 INCHES IN 1917 SNOWFALL 2.0 INCHES IN 2011 PEAK GUST 66 NW IN 1963 RECORDS FOR OCTOBER 31 HIGH 79F IN 1946 LOW 22F IN 1904 PRECIP 3.74 INCHES IN 1991 SNOWFALL TRACE IN 1906 PEAK GUST 70e S IN 1945 TODAY'S REPORT PREPARED BY: Ben Turner and Greg White