BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, SEPTEMBER 5, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME EXCELLENT VISIBILITY WITH A LIGHT SEA BREEZE KICKING IN LATER IN THE DAY.... We observed an almost perfect visibility of 85 miles throughout the day. Wind was light, but shifted from S-E around noon. The highest gust so far today is 23 mph earlier this morning. Skies became gradually cloudier, being completely overcast with cirrostratus clouds shortly following the 1 P.M. observation. Conditions were dry, with dew points only in the upper 40s. The high so far today is 68F, which is 7 degrees below the daily normal maximum of 75F. The low since midnight is 54F, which is 4 degrees below the normal minimum of 58F. PRELIMINARY STATS FOR AUGUST 2019 TEMPERATURE, Deg. F Avg. Max. 80.4 [+1.2] Avg. Min. 62.1 [+0.3] Mean      71.5 [+1.0] 24-hour corrected mean: 70.5 Max. for month: 92F on the 19th Min. for month: 51F on the 26th COOLING DEGREE DAYS Total cooling units:   211 [+22] Total for the season:  619 [+82] Total for last season: 753 PRECIPITATION, Inches Total: 1.83 [-2.21] Greatest in 24 hrs: N/A WIND, mph Avg. uncorrected wind speed: 9.1 mph Avg. corrected wind speed:   9.8 mph Prevailing wind direction: N/A Peak gust and direction: N/A   SUNSHINE: Campbell-Stokes card minutes: N/A Astronomical total minutes:   N/A Today's Observations: 7 A.M. Weather: Scattered cirrus Temperature: 58F; Dew Point: 49F; Wind: S at 6 kts, Wind: Light Sea-level pressure: 30.09 ins. Hg, falling then rising Visibility: 85 miles 6-hr Max temp: 62F 6-hr Min temp: 54F 24-hr Precip: 0.00 ins. BHO SA 1155 250 SCT 85 190/58/49/3506/009/ WND LGT/ 8/002 51013 10062 20054 10 A.M. Weather: Broken cirrostratus, few cumulus Temperature: 65F; Dew Point: 47F; Wind: NE at 6 kts, Wind: Light   Sea-level pressure: 30.11 ins. Hg, falling then rising Visibility: 85 miles 3-hr Precip: 0.00 ins. BHO SA 1455 E250 BKN 85 197/65/47/0506/011/ FEW CU ALQDS WND LGT/ 8/108 50007 1 P.M. Weather: Broken cirrostratus, few cumulus Temperature: 68F; Dew Point: 46F; Wind: E at 4 kts, Wind: Light and variable Sea-level pressure: 30.10 ins. Hg, falling rapidly Visibility: 85 miles 6-hr Max temp: 68F 6-hr Min temp: 58F BHO SA 1755 E250 BKN 85 193/68/46/0904/010/ FEW CU ALQDS WND L/V/ 8/108 58004 10068 20058 SUMMARY FOR WEDNESDAY, SEPTEMBER 4, 2019 TEMPERATURE (DEGREES F) MAX.....83   NORMAL.....76 MIN.....61   NORMAL.....59 MEAN....72   NORMAL.....67 DEPARTURE FROM 30-YEAR NORMAL......................+5 TOTAL DEPARTURE FOR THE MONTH......................+2 [+0.3 DEGREES/DAY] COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY...............7   DEPARTURE.........+4 TOTAL COOLING UNITS FOR THE MONTH..............12   DEPARTURE.........-3 TOTAL COOLING UNITS FOR THE SEASON............631   DEPARTURE........+79 TOTAL COOLING UNITS LAST SEASON TO DATE.......791   DEPARTURE.......-160 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................30 SW  AT  2:10 P.M.                    AERO.........................28 SW  AT  2:08 P.M.                    ASOS.........................30 SSW AT  2:12 P.M.                    DAVIS........................30 SW  AT  1:37 P.M. RMY 30 FASTEST MILE FOR YESTERDAY......................24 SW  AT  2:14 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................23 SSW AT  2:13 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................23 SSW AT  2:13 P.M. AVERAGE WIND SPEED AND DIRECTION..............12.4 S                    ASOS.......................12.7                    DAVIS......................12.0 SSW [215 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.12                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........0.37  DEPARTURE......-0.09                          ASOS..............0.36 TOTAL PRECIPITATION FOR THE YEAR..........37.52  DEPARTURE......+2.03                          ASOS.............37.40 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/..../720/85               32 NW  AERO 28 NW  RMY 28 8/11  78/55/67/-4/0.00/734/87               28 W   AERO 25 W   RMY 28 8/12  82/60/71/0/0.00/749/89                25 W   AERO 23 W   RMY 26 8/13  77/66/72/+1/0.02/059/07               25 W   AERO 24 WSW RMY 24 8/14  75/62/69/-2/..../452/54               24 ENE AERO 22 ENE RMY 22 8/15  77/59/68/-3/..../568/68               17 ESE AERO 15 SSE RMY 16 8/16  78/61/70/-1/..../732/88               20 E   AERO 17 ESE RMY 18 8/17  78/67/73/+2/..../099/12               14 SE  AERO 15 SE  RMY 15 8/18  88/70/79/+8/..../529/64               18 SSW AERO 18 SSW RMY 21 8/19  92/69/81/+11/..../.../..              25 WSW AERO 23 WSW RMY 25 8/20  87/66/77/+7/..../.../..               18 W   AERO 14 WSW RMY N/A 8/21  85/68/77/+7/0.12/.../..               33 SW  AERO 32 SW  RMY 33 8/22  88/68/78/+8/0.00/.../..               25 W   AERO 21 W   RMY 26 8/23  78/60/69/-1/0.04/.../..               23 N   AERO 18 N   RMY 24 8/24  72/55/64/-6/0.00/.../..               25 ENE AERO 21 ENE RMY 22 8/25  66/56/61/-8/0.00/.../..               31 ENE AERO 25 ENE RMY 29 8/26  71/51/61/-8/0.00/.../..               25 NE  AERO 21 NE  RMY 25 8/27  77/54/66/-3/0.00/.../..               18 SSW AERO 18 SSW RMY 17 8/28  78/59/69/0/..../.../..                21 SSE AERO 18 SSE RMY 20 8/29  83/63/73/+4/..../.../..               25 WNW AERO 21 WNW RMY 26 8/30  84/59/72/+4/..../.../..               30 SW  AERO 30 SW  RMY 28 8/31  79/61/70/+2/..../.../..               21 W   AERO 18 W   RMY 20 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 9/01  73/56/65/-3/0.00/.../..                21 ENE AERO 14 ENE RMY 18 9/02  75/57/66/-2/0.37/.../..                39 W   AERO 41 W   RMY 41 9/03  77/61/69/+2/0.00/.../..                18 S   AERO 16 S   RMY N/A 9/04  83/61/72/+5/0.00/.../..                30 SW  AERO 28 SW  RMY 30 9/05 Low temp since midnight is 54F; normal low is 58F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR SEPTEMBER 5 HIGH 90F IN 1971 LOW 45F IN 1906 PRECIP 1.37 INCHES IN 1907 PEAK GUST 46 MPH NW IN 1994 RECORDS FOR SEPTEMBER 6 HIGH 92F IN 1900, 2018 LOW 39F IN 1888 PRECIP 3.19 INCHES IN 1890 PEAK GUST 78e MPH SE IN 1979 (TROPICAL STORM DAVID) TODAY'S REPORT PREPARED BY: Benjamin Turner and Rusty Monro