BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA MONDAY, AUGUST 17, 2020 ALL TIMES ARE IN EASTERN STANDARD TIME FOGGY THIS MORNING FOLLOWING SOME MUCH-NEEDED OVERNIGHT RAINFALL.... We observed not much this morning, as we could only see a half mile due to fog.  However, it cleared up shortly after the 7 A.M. observation, and some sunshine broke through the clouds around noontime.  Luckily we received some rainfall overnight, amounting to 0.38 inches. Visibility rose to 40 miles by 10 A.M., and has stayed that way since then. Wind is cool and easterly, but less than 10 mph. The max gust so far today is 15 mph.   The high so far today is 71F, 9 degrees below the daily normal maximum of 80F. The low since midnight is 59F, 3 degrees below the normal minimum of 62F.   Today's Observations: 7 A.M. Weather: Fog Temperature: 61F; Dew Point: 61F; Relative Humidity: 100% Wind: NNW at 8 kts Sea-level pressure: 29.92 ins. Hg: rising then steady Visibility: 1/2 mile, fog 6-hr Max temp: 62F 6-hr Min temp: 59F 24-hr Precip: 0.38 ins. BHO SA 1155 X W3 1/2F 132/61/61/3408/992/ 8//// 70038 51010 10062 20059 10 A.M. Weather: Broken stratocumulus Temperature: 65F; Dew Point: 60F; Relative Humidity: 83% Wind: NNE at 7 kts Sea-level pressure: 29.93 ins. Hg: falling then rising Visibility: 40 miles 3-hr Precip: 0.00 ins. BHO SA 1455 E20 BKN 40 136/65/60/0207/993/ 8/500 50004 1 P.M. Weather: Broken stratocumulus and altostratus Temperature: 71F; Dew Point: 57F; Relative Humidity: 61% Wind: E at 7 kts Sea-level pressure: 29.93 ins. Hg: falling, then steady Visibility: 40 miles 6-hr Max temp: 71F 6-hr Min temp: 61F 6-hr Precip: 0.00 ins. BHO SA 1755 E40 BKN 90 BKN 40 135/71/57/0807/993/ 8/820 55001 10071 20061 SUMMARY FOR SUNDAY, AUGUST 16, 2020 TEMPERATURE (DEGREES F) MAX.....69   NORMAL.....79 MIN.....62   NORMAL.....62 MEAN....66   NORMAL.....71 DEPARTURE FROM 30-YEAR NORMAL.................-5 TOTAL DEPARTURE FOR THE MONTH.................+79 [+4.7 DEGREES/DAY] COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY.................1   DEPARTURE.......-5                       TOTAL COOLING UNITS FOR THE MONTH................186  DEPARTURE......+77 TOTAL COOLING UNITS FOR THE SEASON...............673  DEPARTURE.....+213 TOTAL COOLING UNITS LAST SEASON TO DATE..........518  DEPARTURE.....+155 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................26 ENE AT  9:37 A.M.                      AERO.........................28 ENE AT  9:38 A.M.                    ASOS.........................27 ENE AT  9:37 A.M.                    DAVIS........................28 E   AT  9:30 A.M                    RMY 26  MERLIN 26 FASTEST MILE FOR YESTERDAY......................19 ENE AT  9:44 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................20 ENE AT  9:54 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................20 E   AT  9:44 A.M. AVERAGE WIND SPEED AND DIRECTION................11.6 NE                              ASOS.........................12.0                    DAVIS........................12.0 ENE [69 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.38  DEPARTURE......+0.25                          ASOS..............0.38 TOTAL PRECIPITATION FOR THE MONTH..........0.61  DEPARTURE......-1.62                          ASOS..............0.62 TOTAL PRECIPITATION FOR THE YEAR..........29.68  DEPARTURE......-3.54                          ASOS.............30.43 PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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 08/01  87/66/77/+5/0.00/.../..             18 S    AERO 21 S    RMY 19 08/02  85/69/77/+5/0.02/.../..             36 S    AERO 37 S    RMY 38 08/03  91/75/83/+11/0.00/.../..            36 WSW  AERO 38 SW   RMY 36 08/04  83/71/77/5/0.21/.../..              67 SSE  AERO 71 S    RMY 70 08/05  90/68/79/+7/0.00/.../..             28 SW   AERO 30 SW   RMY 29 08/06  84/65/75/3/0.00/.../.. 20 W    AERO 17 W    RMY 19 08/07  79/65/72/0/T/.../..                 16 NE   AERO 16 NE   RMY N/A 08/08  83/64/74/+2/0.00/.../..             20 S    AERO 20 S    RMY 19 08/09  90/65/78/+6/0.00/.../..             26 SSW  AERO 26 SSW  RMY 26 08/10  94/69/82/+11/0.00/.../..            22 W    AERO 20 W    RMY 20 08/11  92/72/82/+11/0.00/.../..            31 SSW  AERO 35 SSW  RMY 31  TSTM 08/12  93/74/84/+13/0.00/.../..            22 SSW  AERO 22 SW   RMY 19 08/13  88/71/80/+9/0.00/.../..             18 ENE  AERO 18 NE   RMY 18 08/14  82/67/75/+4/0.00/.../..             23 ENE  AERO 23 ENE RMY N/A 08/15  67/62/65/-6/T/.../..                33 NNE  AERO 32 NNE  RMY N/A 08/16  69/62/66/-5/..../.../..             26 ENE  AERO 28 ENE  RMY 26 08/17  The low since midnight is 59F, the daily normal low is 62F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):   RECORDS FOR AUGUST 17 HIGH 97F IN 1944 LOW 48F IN 1902 PRECIP 2.17 INCHES IN 1998 PEAK GUST 50e MPH SSW IN 1952, 50 MPH WNW IN 1962 RECORDS FOR AUGUST 18 HIGH 93F IN 2002 LOW 47F IN 1824 PRECIP 5.75 INCHES IN 1955 [DIANE] PEAK GUST 46 MPH WNW IN 2007 TODAY'S REPORT PREPARED BY: Benjamin Turner