BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA TUESDAY, AUGUST 18, 2020 ALL TIMES ARE IN EASTERN STANDARD TIME A FAIR-WEATHER DAY WITH A COOL WESTERLY BREEZE.... Today we observed fog this morning, that dissipated rapidly following the 7 A.M. observation. This was the remnants of some rainfall that happened earlier this morning, amounting to 0.23 inches. Humidity has dropped off significantly, sinking to 40% by noontime. This is with a rise in visibility, reaching 75 miles by 1 P.M.     The high so far today is 82F, 3 degrees above the daily normal maximum of 79F. The low since midnight is 63F, a degree above the normal minimum of 62F. Today's Observations: 7 A.M. Weather: Scattered altocumulus and altostratus, with a few stratus fractus Temperature: 65F; Dew Point: 63F; Relative Humidity: 93% Wind: WSW at 8 kts Sea-level pressure: 29.82 ins. Hg: rising then steady Visibility: 25 miles, distant fog 6-hr Max temp: 65F 6-hr Min temp: 63F 24-hr Precip: 0.23 ins. BHO SA 1155 110 SCT 25 099/65/63/2508/982/ FEW STFRA DSNT FG ALQDS/ 8/670 70023 53007 10065 20063 10 A.M. Weather: Broken cumulus Temperature: 75F; Dew Point: 62F; Relative Humidity: 63% Wind: W at 9 kts Sea-level pressure: 29.82 ins. Hg: steady Visibility: 65 miles 3-hr Precip: 0.00 ins. BHO SA 1455 E30 BKN 65 099/75/62/2609/982/ 8/100 50000 1 P.M. Weather: Broken cumulus Temperature: 78F; Dew Point: 54F; Relative Humidity: 44% Wind: WSW at 12G20 kts Sea-level pressure: 29.81 ins. Hg: falling, then steady Visibility: 75 miles 6-hr Max temp: 78F 6-hr Min temp: 64F 6-hr Precip: 0.00 ins. BHO SA 1755 E70 BKN 75 096/78/54/2612G20/981/ 8/100 56003 10082 20064 SUMMARY FOR MONDAY, AUGUST 17, 2020 TEMPERATURE (DEGREES F) MAX.....73   NORMAL.....79 MIN.....59   NORMAL.....62 MEAN....66   NORMAL.....71 DEPARTURE FROM 30-YEAR NORMAL.................-5 TOTAL DEPARTURE FOR THE MONTH.................+74 [+4.2 DEGREES/DAY] COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY.................1   DEPARTURE.......-5                       TOTAL COOLING UNITS FOR THE MONTH................187  DEPARTURE......+72 TOTAL COOLING UNITS FOR THE SEASON...............674  DEPARTURE.....+208 TOTAL COOLING UNITS LAST SEASON TO DATE..........526  DEPARTURE.....+148 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................25 NE  AT  3:34 A.M.                      AERO.........................24 NE  AT  3:36 A.M.                    ASOS.........................24 NE  AT  2:23 A.M.                    DAVIS........................24 NE  AT  2:22 A.M                    RMY N/A  MERLIN N/A FASTEST MILE FOR YESTERDAY......................16 NE  AT  2:24 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................16 SSW AT 10:44 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................17 NE  AT  2:23 A.M. AVERAGE WIND SPEED AND DIRECTION................8.8 N                              ASOS.........................8.8                    DAVIS........................8.9 E [79 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.23  DEPARTURE......+0.10                          ASOS..............0.23 TOTAL PRECIPITATION FOR THE MONTH..........0.84  DEPARTURE......-1.52                          ASOS..............0.85 TOTAL PRECIPITATION FOR THE YEAR..........29.91  DEPARTURE......-3.44                          ASOS.............30.66 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  73/59/66/-5/..../.../..             25 NE   AERO 24 NE   RMY N/A 08/18  The low since midnight is 63F, 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 18 HIGH 93F IN 2002 LOW 47F IN 1824 PRECIP 5.75 INCHES IN 1955 [DIANE] PEAK GUST 46 MPH WNW IN 2007 RECORDS FOR AUGUST 19 HIGH 90F IN 1906, 1966, 2002 LOW 48F IN 1958 PRECIP 7.02 INCHES IN 1955 [DIANE - RECORD FOR MONTH] PEAK GUST 78 MPH ENE IN 1991 – HURRICANE BOB TODAY'S REPORT PREPARED BY: Benjamin Turner