BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, SEPTEMBER 12, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME COOL AND CLOUDY FOLLOWING SOME MORNING RAIN.... We observed limited visibility throughout the day due to a decreasing fog; 5 miles this morning and 40 miles this afternoon. Some rain was seen immediately following the 7 A.M. observation, leaving .1 inches in the gauge at 10 A.M. Skies remained overcast, and a sea breeze around 15 mph persisted. This contributed to temperatures well below seasonal averages.   The high so far today is 63F, 10 degrees below the daily normal of 73F. The low since midnight is 57F, a degree above the average minimum of 56 degrees. 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: 0.81 on the 28th-29th 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: 16404 minutes of possible 24780 or 66% Astronomical total minutes: 17074 minutes of possible 25768 or 66% Today's Observations: 7 A.M. Weather: Broken stratus fractus, broken altocumulus   Temperature: 63F; Dew Point: 61F; Wind: N at 10 kts gusting to 19 kts Sea-level pressure: 30.09 ins. Hg, rising rapidly Visibility: 5 miles due to fog, except 25 miles NE-SE 6-hr Max temp: 69F 6-hr Min temp: 63F 24-hr Precip: 0.00 ins. BHO SA 1155 E35 BKN 120 5F 191/63/61/0110G19/009/ VSBY NE-SE 25 PRESRR/ 8/72/ 53025 10069 20063 10 A.M. Weather: Overcast stratocumulus Temperature: 58F; Dew Point: 56F; Wind: NE at 12 kts gusting to 20 kts   Sea-level pressure: 30.13 ins. Hg, rising Visibility: 30 miles, distant fog 3-hr Precip: 0.11 ins. BHO SA 1455 E20 OVC 30 204/58/56/0412G20/013/ DSNT FG ALQDS/ 8/8// 6011/ 53012 1 P.M. Weather: Overcast stratocumulus Temperature: 57F; Dew Point: 54F; Wind: NNE at 12 kts gusting to 18kts Sea-level pressure: 30.14 ins. Hg, falling then rising Visibility: 40 miles, distant fog 6-hr Max temp: 63F 6-hr Min temp: 57F 6-hr Precip: 0.11 ins. BHO SA 1755 E30 OVC 40 207/57/54/0312G18/014/ DSNT FG ALQDS/ 8/8// 6011/ 50003 10063 20057   SUMMARY FOR WEDNESDAY, SEPTEMBER 11, 2019 TEMPERATURE (DEGREES F) MAX.....83   NORMAL.....73 MIN.....63   NORMAL.....56 MEAN....73   NORMAL.....65 DEPARTURE FROM 30-YEAR NORMAL......................+8 TOTAL DEPARTURE FOR THE MONTH.....................-13 [-1.4 DEGREES/DAY] HEATING DEGREE DAYS (SEASON AUG TO JUL) TOTAL HEATING UNITS FOR YESTERDAY...............0   DEPARTURE.........-3 TOTAL HEATING UNITS FOR THE MONTH..............16   DEPARTURE.........-3 TOTAL HEATING UNITS FOR THE SEASON.............28   DEPARTURE........-16 TOTAL HEATING UNITS LAST SEASON TO DATE........18   DEPARTURE........+10 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY...............8   DEPARTURE.........+5 TOTAL COOLING UNITS FOR THE MONTH..............20   DEPARTURE........-15 TOTAL COOLING UNITS FOR THE SEASON............639   DEPARTURE........+67 TOTAL COOLING UNITS LAST SEASON TO DATE.......825   DEPARTURE.......-186 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................31 SW  AT  6:27 A.M.                    AERO.........................32 SW  AT  6:27 A.M.                    ASOS.........................32 SW  AT  6:29 A.M.                    DAVIS........................31 SW  AT  6:29 A.M. RMY N/A FASTEST MILE FOR YESTERDAY......................23 SW  AT  6:58 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................23 SW  AT  8:23 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................23 SW  AT  6:47 A.M. AVERAGE WIND SPEED AND DIRECTION...............13.3 SW                    ASOS........................13.2                    DAVIS.......................13.0 SW  [229 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..........0.67  DEPARTURE......-0.68                          ASOS..............0.67 TOTAL PRECIPITATION FOR THE YEAR..........37.82  DEPARTURE......+1.44                          ASOS.............37.70 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/+2/0.34/367/43               32 SSW AERO 35 SSW RMY 35 8/08  84/67/76/+4/0.44/588/69               30 SW  AERO 24 WNW RMY 29 8/09  82/63/73/+1/0.00/815/96               28 NW  AERO 25 NW  RMY 26 8/10  78/59/69/-2/0.00/720/85               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/T/452/54                  24 ENE AERO 22 ENE RMY 22 8/15  77/59/68/-3/0.02/568/68               17 ESE AERO 15 SSE RMY 16 8/16  78/61/70/-1/0.00/740/89               20 E   AERO 17 ESE RMY 18 8/17  78/67/73/+2/0.01/099/12               14 SE  AERO 15 SE  RMY 15 8/18  88/70/79/+8/0.00/529/64               18 SSW AERO 18 SSW RMY 21 8/19  92/69/81/+11/0.03/536/65              25 WSW AERO 23 WSW RMY 25 8/20  87/66/77/+7/0.00/797/97               18 W   AERO 14 WSW RMY N/A 8/21  85/68/77/+7/0.12/287/35               33 SW  AERO 32 SW  RMY 33 8/22  88/68/78/+8/0.00/522/64               25 W   AERO 21 W   RMY 26 8/23  78/60/69/-1/0.04/016/02               23 N   AERO 18 N   RMY 24 8/24  72/55/64/-6/0.00/803/99               25 ENE AERO 21 ENE RMY 22 8/25  66/56/61/-8/0.00/590/73               31 ENE AERO 25 ENE RMY 29 8/26  71/51/61/-8/0.00/717/89               25 NE  AERO 21 NE  RMY 25 8/27  77/54/66/-3/0.00/530/66               18 SSW AERO 18 SSW RMY 17 8/28  78/59/69/0/0.66/184/23                21 SSE AERO 18 SSE RMY 20 8/29  83/63/73/+4/0.15/614/77               25 WNW AERO 21 WNW RMY 26 8/30  84/59/72/+4/0.00/739/93               30 SW  AERO 30 SW  RMY 28 8/31  79/61/70/+2/0.00/602/76               21 W   AERO 18 W   RMY 20 PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER 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  68/54/61/-6/0.00/.../..                23 NW  AERO 17 NW  RMY N/A 9/06  65/56/61/-6/..../.../..                37 ENE AERO 36 ENE RMY 36 9/07  70/51/61/-5/0.00/.../..                37 N   AERO 37 N   RMY N/A 9/08  73/53/63/-3/0.00/.../..                25 W   AERO 21 W   RMY N/A 9/09  71/54/63/-3/0.00/.../..                17 SE  AERO 16 SE  RMY 16 9/10  73/57/65/0/0.00/.../..                 25 S   AERO 25 S   RMY N/A 9/11  83/63/73/+8/0.00/.../..                31 SW  AERO 32 SW  RMY N/A 9/12 Low temp since midnight is 63F; normal low is 56F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR SEPTEMBER 12 HIGH 92F IN 1961 LOW 42F IN 1958,1967,1985 PRECIP 2.79 INCHES IN 1960 (HURRICANE DONNA) PEAK GUST 140 MPH SSE IN 1960 (HURRICANE DONNA) RECORDS FOR SEPTEMBER 13 HIGH 91F IN 1957 LOW 40F IN 1985 PRECIP 3.10 INCHES IN 1987 PEAK GUST 44 MPH WNW IN 1986 TODAY'S REPORT PREPARED BY: Benjamin Turner