BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA FRIDAY, SEPTEMBER 3, 2021 ALL TIMES ARE IN EASTERN STANDARD TIME SUNRISE: 0510E SUNSET:  1815E   EXCELLENT VISIBILITY WITH PARTLY CLOUDY SKIES ATOP GREAT BLUE HILL.... Today featured some pristine weather. Fall seems to be arriving right on time, which is fortunate. Skies were partly cloudy, and the humidity issues of late August are but a distant memory.   Visibility was an excellent 80 miles all day, that's a little better than typical for a mid-fall day. Wind is north westerly at an average of 10 mph with a max gust so far of 23 mph.   The high so far today is 71F, this is 6 degrees below the daily normal maximum of 77F. The low so far today is 52F, which is 8 degrees below the daily normal minimum of 60F. ---------------------------------------------------- PRELIMINARY STATS FOR AUGUST 2021 TEMPERATURE, Deg. F Avg. Max. 81.6 [+1.4] Avg. Min. 65.4 [+2.8] Mean      73.5 [+2.1] 24-hour corrected mean: 72.6 Max. for month: 92F on the 13th Min. for month: 58F on the 1st HEATING DEGREE DAYS Total heating units:      0 [-11] Total for the season:    28 [+25] Total for last season:    3 COOLING DEGREE DAYS Total cooling units:     271 [+62] Total for the season:    650 [+54] Total for last season:   757 PRECIPITATION, Inches Total: 5.37 [+1.46] Greatest in 24 hrs: N/A WIND, mph Avg. uncorrected wind speed:  8.8 mph Avg. corrected wind speed:    9.5 mph Prevailing wind direction:   SSW [14%] Peak gust and direction:     47 ESE on the 22nd SUNSHINE: Campbell-Stokes card minutes: N/A Astronomical total minutes: N/A Today's Observations: 7 A.M. Weather: Clear, few altocumulus Temperature: 55F; Dew Point: 52F; Relative Humidity: 89% Wind: NW @ 10G16 kts Sea-level pressure: 1015.2 mb; 29.98 in. Hg; falling then rising Visibility: 80 miles 6-hr Max temp: 55F 6-hr Min temp: 52F 24-hr Precip: Trace BHO SA 1155 CLR 80 152/55/52/3110G16/998/ FEW AC/AS ALQDS/ 8/070 70000 53008 10055 20052 10 A.M. Weather: Scattered altocumulus, few cumulus Temperature: 65F; Dew Point: 53F; Relative Humidity: 65% Wind: NNW @ 10G15 Sea-level pressure: 1015.3 mb; 29.98 in Hg; rising, then steady Visibility: 80 miles 3-hr Precip: 0.00 ins. BHO SA 1455 70 SCT 80 153/65/53/3410G15/998/ FEW CU ALQDS/ 8/150 51001 1 P.M. Weather: Scattered cumulus Temperature: 67F, Dew point: 53F; Relative Humidity: 60% Wind: NW @ 8G15 kts Sea-level pressure: 1014.4 mb; 29.95 in Hg; falling steadily Visibility: 80 miles 6-hr Max temp: 71F 6-hr Min temp: 55F 6-hr Precip: 0.00 ins. BHO SA 1755 50 SCT 80 144/67/53/3208G15/995/ 8/100 57009 10071 20055 SUMMARY FOR THURSDAY, SEPTEMBER 2, 2021 TEMPERATURE (DEGREES F) MAX.......71     NORMAL.....77 MIN.......55     NORMAL.....60 MEAN......63     NORMAL.....69 DEPARTURE FROM 30-YEAR (1991-2020) NORMAL............-6 TOTAL DEPARTURE FOR THE MONTH........................-13 [-6.7 DEGREES/DAY] HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022) TOTAL HEATING UNITS FOR YESTERDAY................2  DEPARTURE........+1 TOTAL HEATING UNITS FOR THE MONTH................5  DEPARTURE........+3 TOTAL HEATING UNITS FOR THE SEASON..............33  DEPARTURE.......+13 TOTAL HEATING UNITS LAST SEASON TO DATE..........4  DEPARTURE.......+29 COOLING DEGREE DAYS (SEASON: JAN 2021 THRU DEC 2021) TOTAL COOLING UNITS FOR YESTERDAY................0  DEPARTURE........-5 TOTAL COOLING UNITS FOR THE MONTH................0  DEPARTURE........-9 TOTAL COOLING UNITS FOR THE SEASON.............650  DEPARTURE.......+45 TOTAL COOLING UNITS LAST SEASON TO DATE........760  DEPARTURE......-110 PEAK WIND GUST (MPH):                      Official...................49 ENE @  1:31 A.M.                      AEROVANE (south tower).....52 ENE @  1:33 A.M.                      VECTOR #2 (south tower)....55     @  1:31 A.M.                      DAVIS #2 (south tower).....47 E   @  1:09 A.M.                      ASOS...........OUT OF SERVICE D/T RENOVATIONS                      VECTOR #1......OUT OF SERVICE D/T RENOVATIONS                      DAVIS #1.......OUT OF SERVICE D/T RENOVATIONS                      RMY............OUT OF SERVICE D/T RENOVATIONS                        MERLIN.........OUT OF SERVICE D/T RENOVATIONS FASTEST MILE: CONTACTING ANEMOMETER/OFFICIAL..................33 ENE @  1:31 A.M. MAXIMUM 2-MINUTE VECTOR #2 AVERAGE..............32     @  1:12 A.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............32 E   @  1:13 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE.......OUT OF SERVICE D/T RENOVATIONS MAXIMUM 2-MINUTE DAVIS #1 AVERAGE...OUT OF SERVICE D/T RENOVATIONS MAXIMUM 2-MINUTE VECTOR #1 AVERAGE..OUT OF SERVICE D/T RENOVATIONS MAXIMUM 2-MINUTE RMY AVERAGE........OUT OF SERVICE D/T RENOVATIONS AVERAGE WIND SPEED AND DIRECTION:                      CONTACTING/OFFICIAL.......14.0 NNW  [337 total miles]                      VECTOR #2.................14.4                      DAVIS #2..................14.0 NNW                      RMY.................OUT OF SERVICE D/T RENOVATIONS                      ASOS................OUT OF SERVICE D/T RENOVATIONS                      VECTOR #1...........OUT OF SERVICE D/T RENOVATIONS                      DAVIS #1............OUT OF SERVICE D/T RENOVATIONS    PRECIPITATION (INCHES) THROUGH THIS MORNING (EST): TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.......4.00  DEPARTURE....+3.78 TOTAL PRECIPITATION FOR THE MONTH.............4.00  DEPARTURE....+3.78 TOTAL PRECIPITATION FOR THE YEAR.............44.34  DEPARTURE....+9.77 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 08/01   77/58/68/-5/T/589/68             23 SSW AERO 24 SSW RMY N/A 08/02   78/61/70/-3/T/821/95             28 WNW AERO 28 WNW RMY N/A 08/03   76/60/68/-5/0.00/302/35          15 N   AERO 16 N   RMY N/A 08/04   75/61/68/-5/0.71/077/09          21 ESE AERO 21 ESE RMY N/A 08/05   68/61/65/-8/1.68/000/00          28 NE  AERO 28 NE  RMY N/A 08/06   85/62/74/+1/0.00/727/85          19 S   AERO 20 WSW RMY N/A 08/07   88/66/77/+4/0.00/520/61          23 SW  AERO 23 SW  RMY N/A 08/08   80/67/74/+2/T/128/15             16 SW  AERO 16 WNW RMY N/A 08/09   75/64/70/-2/0.25/076/09          22 ENE AERO 21 NE  RMY N/A 08/10   78/63/71/-1/0.12/203/24          19 S   AERO 20 S   RMY N/A 08/11   89/70/80/+8/0.00/667/79          29 SSW AERO 28 SSW RMY N/A 08/12   91/71/81/+9/T/580/69             36 WSW AERO 37 WSW RMY N/A TSTM 08/13   92/73/83/+11/0.00/696/83         18 WSW AERO 18 WSW RMY N/A 08/14   87/69/78/+6/T/601/72             25 W   AERO 25 NNW RMY N/A 08/15   80/62/71/-1/0.00/800/96          19 NNW AERO 20 NNW RMY N/A 08/16   78/59/69/-3/0.00/564/68          15 S   AERO 15 S   RMY N/A 08/17   82/63/73/1/0.00/555/67           22 SSW AERO 23 SSW RMY N/A 08/18   86/66/76/+5/0.00/338/41          21 SSW AERO 22 SSW RMY N/A 08/19   81/69/75/+4/0.62/222/27          41 S   AERO 43 S   RMY N/A 08/20   78/70/74/+3/0.01/.../..          21 WSW AERO N/A    RMY N/A 08/21   86/69/78/+7/0.00/.../..          17 S   AERO 17 S   RMY N/A 08/22   74/66/70/-1/0.78/.../..          47 ESE AERO 48 ESE RMY N/A 08/23   83/68/76/+5/1.17/.../..          25 SSE AERO 26 SSE RMY N/A TSTM 08/24   86/67/77/+6/0.01/.../..          21 NNW AERO 21 NNW RMY N/A 08/25   89/70/80/+10/0.00/.../..         17 SW  AERO 18 SW  RMY N/A 08/26   92/72/82/+12/0.00/.../..         19 WSW AERO 18 WSW RMY N/A 08/27   89/70/80/+10/T/.../..            30 ENE AERO 30 ENE RMY N/A 08/28   70/59/65/-5/0.02/.../..          34 ENE AERO 34 ENE RMY N/A 08/29   72/59/66/-4/T/.../..             20 S   AERO 21 S   RMY N/A 08/30   84/67/76/+7/0.00/.../..          25 SW  AERO 26 SW  RMY N/A 08/31   80/65/73/+4/0.00/.../..          27 WNW AERO 28 WNW RMY N/A 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 09/01   68/56/62/-7/..../.../..          34 NNE AERO 37 NNE RMY N/A     09/02   71/55/63/-6/..../.../..          49 ENE AERO 52 ENE RMY N/A TSTM 09/03   The low since midnight is 52F, the daily normal low is 60F RECORDS FOR THE MONTH 08/22 NEW PEAK GUST RECORD OF 47 MPH,       BEATING THE OLD RECORD OF 44 MPH IN 1987 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) RECORDS FOR SEPTEMBER 3 HIGH 95F IN 1929 LOW 43F IN 1893 PRECIP 3.82 INCHES IN 1972 (TROPICAL STORM CARRIE) PEAK GUST 58 MPH NNE IN 1972 (TROPICAL STORM CARRIE) RECORDS FOR SEPTEMBER 4 HIGH 90F IN 1953, 1973 LOW 46F IN 1987 PRECIP 3.22 INCHES IN 1922 PEAK GUST 47 MPH SE IN 1966 TODAY'S REPORT PREPARED BY: Benjamin Turner