BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA SATURDAY, AUGUST 1, 2020 ALL TIMES ARE IN EASTERN STANDARD TIME DECENT VISIBILITY WITH FAIR WEATHER AND LIGHT WINDS ATOP GREAT BLUE HILL.... Today we observed partly cloudy skies, with a decent visibility of 70 miles seen at 1 P.M. Wind was light, but shifted from north to east-southeast between 10 A.M. and noontime. Cloud cover increased slightly since this morning, now covering more than half the sky. The dew point has remained in the low 60s, making for a bearable midsummers' day. A review of 90+ degree days so far this year indicates a total of 7. Per our Chief Scientist, Mike Iacono, "the full record mean (1885-2019) number of days is 6 for the year, but the most recent 30-year average is 9 for the year, so it’s increasing". The most ever recorded during the year was 23 back in 1949 and in 2002. Heat wave section written by Andrew Swanson! The high so far today is 87 degrees. This is 6 degrees above the daily normal high of 81F. The low since midnight is 66F, which is 3 degrees above the daily normal low of 63F. Today's Observations: 7 A.M. Weather: Scattered cirrus, few altocumulus Temperature: 72F; Dew Point: 64F; Relative Humidity: 76% Wind: NNW at 4 kts (wind light and variable) Sea-level pressure: 29.94 ins. Hg: rising, then more rapidly Visibility: 30 miles, hazy 6-hr Max temp: 72F 6-hr Min temp: 66F 24-hr Precip: 0.00 ins. BHO SA 1155 250 SCT 30 140/72/64/3404/994/ FEW AC ALQDS HAZY WND L/V/ 8/081 51019 10072 20066 10 A.M. Weather: Scattered cirrus, few cumulus Temperature: 81F; Dew Point: 62F; Relative Humidity: 53% Wind: N at 4 kts (wind light and variable) Sea-level pressure: 29.98 ins. Hg: falling, then rising Visibility: 60 miles 3-hr Precip: 0.00 ins. BHO SA 1455 250 SCT 60 152/81/62/3604/998/ FEW CU ALQDS WND L/V/ 8/101 51012 1 P.M. Weather: Scattered Cumulus Temperature: 87F; Dew Point: 61F; Relative Humidity: 42% Wind: ESE at 5 kts (wind light) Sea-level pressure: 29.97 ins. Hg: falling steadily Visibility: 70 miles 6-hr Max temp: 87F 6-hr Min temp: 72F 6-hr Precip: 0.00 ins. BHO SA 1755 50 SCT 70 148/87/61/1105/997/ WND LGT/ 8/100 58004 10087 20072 SUMMARY FOR FRIDAY, JULY 31, 2020 TEMPERATURE (DEGREES F) MAX.....84   NORMAL.....81 MIN.....69   NORMAL.....63 MEAN....77   NORMAL.....72 DEPARTURE FROM 30-YEAR NORMAL..................+5 TOTAL DEPARTURE FOR THE MONTH.................+97 [+2.9 DEGREES/DAY] COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY.................12  DEPARTURE.......+5 TOTAL COOLING UNITS FOR THE MONTH................303  DEPARTURE......+81 TOTAL COOLING UNITS FOR THE SEASON...............487  DEPARTURE.....+136 TOTAL COOLING UNITS LAST SEASON TO DATE..........411  DEPARTURE......+76 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................14 ENE AT 3:54 P.M.                      AERO.........................14 ENE AT 3:41 P.M.                    ASOS.........................15 ENE AT 3:55 P.M.                    DAVIS........................16 ENE AT 3:55 P.M                    RMY 15  MERLIN 14 FASTEST MILE FOR YESTERDAY......................10 ENE AT 3:54 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................12 ENE AT 3:55 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................12  E  AT 3:54 P.M. AVERAGE WIND SPEED AND DIRECTION...............6.0 NE                               ASOS........................6.3                    DAVIS.......................6.4 NE [43 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.15                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........1.72  DEPARTURE......-2.30                          ASOS..............1.80 TOTAL PRECIPITATION FOR THE YEAR..........29.07  DEPARTURE......-1.92                          ASOS.............29.81 PRELIMINARY CLIMATE SUMMARY FOR JULY 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 07/01  76/63/70/0/0.00/228/25              16 E    AERO 14 E    RMY 14  TSTM 07/02  86/61/74/4/0.00/803/88              30 WSW  AERO 25 WSW  RMY 33 07/03  73/60/67/-4/0.00/091/10             30 NE   AERO 28 NE   RMY 30 07/04  79/60/70/-1/0.00/565/62             16 S    AERO 16 S    RMY 16 07/05  83/63/73/+2/0.54/373/41             24 NW   AERO 30 NW   RMY 26  TSTM 07/06  73/60/67/-4/0.00/482/53             20 ENE  AERO 16 NNE  RMY 18 07/07  78/60/69/-2/0.00/454/50             25 S    AERO 25 S    RMY 26 07/08  83/64/74/+2/0.00/227/25             32 SSW  AERO 32 SSW  RMY 32 07/09  89/70/80/+8/0.00/834/92             24 S    AERO 23 S    RMY 22 07/10  83/70/77/+5/0.05/109/12             30 SSE  AERO 32 SSE  RMY N/A 07/11  85/70/78/+6/0.00/614/68             39 S    AERO 39 S    RMY 38 07/12  86/70/78/+6/0.00/830/92             28 WSW  AERO 28 WSW  RMY 29 07/13  82/69/76/+4/0.23/306/34             30 SSE  AERO 31 SSE  RMY 30  TSTM 07/14  78/63/71/-1/0.00/369/41             26 ENE  AERO 25 ENE  RMY 26   07/15  72/59/66/-6/0.00/539/60             21 NE   AERO 21 NE   RMY N/A 07/16  73/57/65/-7/0.00/815/91             21 E    AERO 21 E    RMY 19 07/17  71/57/64/-8/0.19/027/03             24 SSW  AERO 24 SSW  RMY 25 07/18  89/66/78/+6/0.00/822/92             18 W    AERO 17 W    RMY 19 07/19  92/69/81/+9/0.00/.../..             28 S    AERO 28 S    RMY 26 07/20  91/72/82/+10/T/.../..               25 SSW  AERO 25 SSW  RMY N/A 07/21  88/68/78/+6/0.00/.../..             25 W    AERO 25 W    RMY 24 07/22  80/67/74/+2/..../.../..             16 ENE  AERO M  M    RMY 16 07/23  88/68/78/+6/0.48/.../..             31 N    AERO 32 N    RMY 31  TSTM 07/24  81/68/75/+3/0.00/.../..             15 ENE  AERO 15 ENE  RMY 16 07/25  88/67/78/+6/0.00/.../..             18 W    AERO 18 WNW  RMY N/A 07/26  89/70/80/+8/0.00/.../..             27 W    AERO 28 W    RMY 27 07/27  94/72/83/+11/0.00/.../..            23 SW   AERO 25 SW   RMY N/A 07/28  95/74/85/+13/0.01/.../..            28 WSW  AERO 25 WSW  RMY 25 07/29  90/68/79/+7/0.00/.../..             23 SSW  AERO 25 SSW  RMY 24 07/30  88/71/80/+8/0.00/.../..             29 W    AERO 28 W    RMY 29   07/31  84/69/77/+5/0.00/.../..             14 ENE  AERO 14 ENE  RMY 15 08/01  The low since midnight is 66F, the daily normal low is 63F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):   RECORDS FOR AUGUST 1 HIGH 97F IN 1917 LOW 49F IN 1891 PRECIP 3.61 INCHES IN 1927 PEAK GUST 41 MPH NNW IN 1985 RECORDS FOR AUGUST 2 HIGH 101F IN 1975 [STATION RECORD MAXIMUM - Tied with 8/10/1949] LOW 50F IN 1929, 1947 PRECIP 1.59 INCHES IN 1946 PEAK GUST 50 MPH SW IN 2006 TODAY'S REPORT PREPARED BY: Benjamin Turner