BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY TUESDAY, AUGUST 20, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME WARM AND DRY WITH FAIR WEATHER AND LIGHT WINDS.... Visibility was good throughout the day, with 70 miles on average being observed. Conditions were fair and dry, with partly cloudy skies and a humidity of 30% in the afternoon. Wind was westerly and light, with a speed of around 5 mph. The high so far today is 86F, 7 degrees above the daily normal maximum of 79F. The low since midnight is 66F, 4 degrees above the average daily minimum of 62F. Today's Observations: 7 A.M. Weather: Scattered cirrus Temperature: 70F; Dew Point: 62F; Wind: WNW at 7 kts Sea-level pressure: 30.09 ins. Hg, rising steadily Visibility: 75 miles 6-hr Max temp: 70F 6-hr Min temp: 66F 24-hr Precip: 0.03 ins. BHO SA 1155 250 SCT 75 189/70/62/2907/009/ 8/001 51017 10070 20066 10 A.M. Weather: Scattered cirrus Temperature: 79F; Dew Point: 61F; Wind: WNW at 4 kts, Wind: Light and variable Sea-level pressure: 30.10 ins. Hg, falling, then rising Visibility: 70 miles 3-hr Precip: 0.00 ins. BHO SA 1455 250 SCT 70 193/79/61/2904/010/ WND L/V/ 8/002 50004 1 P.M. Weather: Scattered cirrus, few cumulus NW-N, E-SE Temperature: 85F; Dew Point: 57F; Wind: WNW at 3 kts, Wind: Light and variable Sea-level pressure: 30.07 ins. Hg, falling steadily Visibility: 65 miles 6-hr Max temp: 86F 6-hr Min temp: 70F 6-hr Precip: 0.00 ins. BHO SA 1755 250 SCT 65 185/85/57/2903/007/ WND L/V/ FEW CU NW-N AND E-SE/ 8/102 58008 10086 20070 SUMMARY FOR MONDAY, AUGUST 19, 2019 TEMPERATURE (DEGREES F) MAX.....92   NORMAL.....79 MIN.....69   NORMAL.....62 MEAN....81   NORMAL.....70 DEPARTURE FROM 30-YEAR NORMAL.....................+11 TOTAL DEPARTURE FOR THE MONTH.....................+23 [+1.0 DEGREES/DAY] COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY..............16   DEPARTURE........+10 TOTAL COOLING UNITS FOR THE MONTH.............145   DEPARTURE........+18 TOTAL COOLING UNITS FOR THE SEASON............556   DEPARTURE........+78 TOTAL COOLING UNITS LAST SEASON TO DATE.......661   DEPARTURE.......-105 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................25 WSW AT  5:09 P.M.                    AERO.........................23 WSW AT  5:04 P.M.                    ASOS.........................24 SSW AT  6:47 P.M.                    DAVIS........................26 SW  AT  4:10 P.M. RMY 25 FASTEST MILE FOR YESTERDAY......................18 WSW AT  6:22 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................17 SW  AT  6:50 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................18 SW  AT  6:49 P.M. AVERAGE WIND SPEED AND DIRECTION.............11.1 SW                    ASOS......................11.2                    DAVIS.....................11.1 SW [233 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.03  DEPARTURE......-0.10                          ASOS..............0.03 TOTAL PRECIPITATION FOR THE MONTH..........0.86  DEPARTURE......-1.77                          ASOS..............0.85 TOTAL PRECIPITATION FOR THE YEAR..........36.13  DEPARTURE......+2.56                          ASOS.............36.13 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 8/01  84/66/75/+3/0.00/755/87               18 NNW AERO 20 NW  RMY 17 8/02  83/61/72/0/0.00/804/93                18 WSW AERO 18 WSW RMY 18 8/03  84/66/75/+3/0.00/302/35               25 SW  AERO 26 SW  RMY 25 8/04  83/66/75/+3/0.00/732/85               21 NE  AERO 23 SW  RMY 25 8/05  81/58/70/-2/0.00/842/98               20 S   AERO 18 S   RMY 19 8/06  79/63/71/-1/0.00/282/33               15 S   AERO 14 S   RMY 17 8/07  82/66/74/+2/..../367/43               32 SSW AERO 35 SSW RMY 35 8/08  84/67/76/+4/..../588/69               30 SW  AERO 24 WNW RMY 29 8/09  82/63/73/+1/..../815/96               28 NW  AERO 25 NW  RMY 26 8/10  78/59/69/-2/..../669/79               32 NW  AERO 28 NW  RMY 28 8/11  78/55/67/-4/0.00/.../..               28 W   AERO 25 W   RMY 28 8/12  82/60/71/0/0.00/.../..                25 W   AERO 23 W   RMY 26 8/13  77/66/72/+1/0.02/.../..               25 W   AERO 24 WSW RMY 24 8/14  75/62/69/-2/..../.../..               24 ENE AERO 22 ENE RMY 22 8/15  77/59/68/-3/..../.../..               17 ESE AERO 15 SSE RMY 16 8/16  78/61/70/-1/..../../..                20 E   AERO 17 ESE RMY 18 8/17  78/67/73/2/..../../..                 14 SE  AERO 15 SE  RMY 15 8/18  88/70/79/+8/..../.../..               18 SSW AERO 18 SSW RMY 21 8/19  92/69/81/+11/..../.../..              25 WSW AERO 23 WSW RMY 25 8/20 Low temp since midnight is 66F; normal low is 62F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR AUGUST 20 HIGH 93F IN 1937 LOW 48F IN 1896, 1905, 1949 PRECIP 2.71 INCHES IN 1970 PEAK GUST 47 MPH W IN 1983 RECORDS FOR AUGUST 21 HIGH 92F IN 1937, 1995 LOW 47F IN 1982 PRECIP 2.84 INCHES IN 1888 PEAK GUST 54 MPH WSW IN 2004 TODAY'S REPORT PREPARED BY: Benjamin Turner