BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, AUGUST 19, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME HOT WITH ABUNDANT SUNSHINE AND SOME AFTERNOON THUNDERSTORMS.... We observed a distant haze that increased as the day went on, bringing visibility from 65 miles to 40 miles. Wind was southwesterly, blowing at an average of 15 mph. Thunderstorms occurred this afternoon, with thunder being heard between 3 P.M. and 6 P.M. Trace amounts of rain fell within that time, with the majority missing the observatory. The high so far today is 92F, 13 degrees above the daily normal maximum of 79F. The low since midnight is 71F, 9 degrees above the average daily minimum of 62F. Today's Observations: 7 A.M. Weather: Scattered altocumulus, broken cirrus Temperature: 74F; Dew Point: 68F; Wind: SW at 7 kts Sea-level pressure: 29.99 ins. Hg, falling, then rising Visibility: 65 miles, distant haze 6-hr Max temp: 74F 6-hr Min temp: 71F 24-hr Precip: Trace BHO SA 1155 140 SCT E250 BKN 65 158/74/68/2207/999/ DSNT HZ ALQDS/ 8/062 50005 10074 20071 10 A.M. Weather: Scattered altocumulus, broken cirrus Temperature: 84F; Dew Point: 71F; Wind: NNW at 10G19 kts Sea-level pressure: 29.98 ins. Hg, rising, then falling Visibility: 40 miles, hazy 3-hr Precip: 0.00 ins. BHO SA 1455 140 SCT E250 BKN 40 155/84/71/2410G19/998/ HAZY/ 8/062 55003 1 P.M. Weather: Scattered cumulus, scattered altocumulus, broken cirrostratus Temperature: 88F; Dew Point: 71F; Wind: WSW at 9G18 kts Sea-level pressure: 29.94 ins. Hg, falling steadily Visibility: 40 miles, hazy 6-hr Max temp: 92F 6-hr Min temp: 74F 6-hr Precip: 0.00 ins. BHO SA 1755 50 SCT 150 SCT E230 BKN 40 144/88/71/2509G18/994/ HAZY/ 8/268 58011 10092 20074 SUMMARY FOR SUNDAY, AUGUST 18, 2019 TEMPERATURE (DEGREES F) MAX.....88   NORMAL.....79 MIN.....70   NORMAL.....62 MEAN....79   NORMAL.....71 DEPARTURE FROM 30-YEAR NORMAL......................+8 TOTAL DEPARTURE FOR THE MONTH.....................+12 [+0.5 DEGREES/DAY] COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY..............14   DEPARTURE.........+8 TOTAL COOLING UNITS FOR THE MONTH.............129   DEPARTURE.........+8 TOTAL COOLING UNITS FOR THE SEASON............540   DEPARTURE........+68 TOTAL COOLING UNITS LAST SEASON TO DATE.......661   DEPARTURE.......-121 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................18 SSW AT  9:25 P.M.                    AERO.........................18 SSW AT  9:21 P.M.                    ASOS.........................20 SSW AT 10:22 P.M.                    DAVIS........................19 S   AT  9:15 P.M. RMY 21 FASTEST MILE FOR YESTERDAY......................14 SSW AT  9:14 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................15 SSW AT 10:27 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................15 ESE AT  2:51 P.M. AVERAGE WIND SPEED AND DIRECTION..............6.5 S                    ASOS.......................7.0                    DAVIS......................6.8 SSW [195 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.13                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........0.83  DEPARTURE......-1.67                          ASOS..............0.82 TOTAL PRECIPITATION FOR THE YEAR..........36.15  DEPARTURE......+2.66                          ASOS.............36.10 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 Low temp since midnight is 71F; normal low is 62F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): 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 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 TODAY'S REPORT PREPARED BY: Benjamin Turner