BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA TUESDAY, SEPTEMBER 7, 2021 ALL TIMES ARE IN EASTERN STANDARD TIME SUNRISE: 0516E SUNSET:  1807E   AN ABSOLUTE "TOP TEN" DAY HERE ON BLUE HILL.... It doesn't get much better than this for early September. An abundance of sunshine has been the theme today with only some cumulus clouds popping up by early afternoon. The air is comfortably dry with the dew point hanging out in the mid 50s. This dry air has promoted excellent visibility, which has averaged around 80 miles all day! A nice westerly breeze has been just adding to the comfort of the day. Speeds have been averaging between 5-10mph most of the day. A few gusts exceeding 20 mph have been observed. The high so far today is 77F, this is 1 degree above the daily normal maximum of 76F. The low so far today is 57F, which is 2 degrees below the daily normal minimum of 59F. ---------------------------------------------------- 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: 12612 minutes of a possible 24780, or 51% Astronomical total minutes: 13116 minutes of a possible 25728, or 51% Today's Observations: 7 A.M. Weather: Clear Temperature: 61F; Dew Point: 55F; Relative Humidity: 80% Wind: W @ 6 kts Sea-level pressure: 1014.2 mb; 29.95 in. Hg; rising, then more slowly Visibility: 80 miles 6-hr Max temp: 61F 6-hr Min temp: 57F 24-hr Precip: 0.00 ins. BHO SA 1155 CLR 80 142/61/55/2806/995/ 8/000 51012 10061 20057 10 A.M. Weather: Clear, few cumulus distant SW-N Temperature: 71F; Dew Point: 57F; Relative Humidity: 61% Wind: W @ 7 kts Sea-level pressure: 1014.7 mb; 29.96 in Hg; rising, then falling Visibility: 80 miles 3-hr Precip: 0.00 ins. BHO SA 1455 CLR 80 147/71/57/2707/996/ FEW CU DSNT SW-N/ 8/200 50005 1 P.M. Weather: Scattered cumulus Temperature: 76F, Dew point: 56F; Relative Humidity: 50% Wind: WSW @ 10G20 kts Sea-level pressure: 1014.3 mb; 29.95 in Hg; falling, then steady Visibility: 80 miles 6-hr Max temp: 77F 6-hr Min temp: 61F 6-hr Precip: 0.00 ins. BHO SA 1755 45 SCT 80 143/76/56/2510G20/995/ 8/200 56004 10077 20061 SUMMARY FOR MONDAY, SEPTEMBER 6, 2021 TEMPERATURE (DEGREES F) MAX.......80     NORMAL.....76 MIN.......61     NORMAL.....59 MEAN......71     NORMAL.....68 DEPARTURE FROM 30-YEAR (1991-2020) NORMAL............ +3 TOTAL DEPARTURE FOR THE MONTH........................-20 [-3.5 DEGREES/DAY] HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022) TOTAL HEATING UNITS FOR YESTERDAY................0  DEPARTURE........-1 TOTAL HEATING UNITS FOR THE MONTH................8  DEPARTURE........+1 TOTAL HEATING UNITS FOR THE SEASON..............36  DEPARTURE.......+11 TOTAL HEATING UNITS LAST SEASON TO DATE..........4  DEPARTURE.......+32 COOLING DEGREE DAYS (SEASON: JAN 2021 THRU DEC 2021) TOTAL COOLING UNITS FOR YESTERDAY................6  DEPARTURE........+2 TOTAL COOLING UNITS FOR THE MONTH................8  DEPARTURE.......-18 TOTAL COOLING UNITS FOR THE SEASON.............658  DEPARTURE.......+36 TOTAL COOLING UNITS LAST SEASON TO DATE........777  DEPARTURE......-119 PEAK WIND GUST (MPH):                      Official...................24 WNW @  9:33 P.M.                      AEROVANE (south tower).....25 WNW @  9:34 P.M.                      VECTOR #2 (south tower)....26     @  9:33 P.M.                      DAVIS #2 (south tower).....25 W   @  3:42 P.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..................18 WNW @  9:19 P.M. MAXIMUM 2-MINUTE VECTOR #2 AVERAGE..............19     @  9:41 P.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............19 WNW @  9:50 P.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.......10.0 W   [239 total miles]                      VECTOR #2.................10.8                      DAVIS #2..................10.7 W                      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.......0.00  DEPARTURE....-0.13 TOTAL PRECIPITATION FOR THE MONTH.............4.04  DEPARTURE....+3.33 TOTAL PRECIPITATION FOR THE YEAR.............44.38  DEPARTURE....+9.32 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/+3/0.01/066/08          21 WSW AERO N/A    RMY N/A 08/21   86/69/78/+7/0.00/581/71          17 S   AERO 17 S   RMY N/A 08/22   74/66/70/-1/0.78/000/00          47 ESE AERO 48 ESE RMY N/A 08/23   83/68/76/+5/1.17/333/41          25 SSE AERO 26 SSE RMY N/A TSTM 08/24   86/67/77/+6/0.01/567/70          21 NNW AERO 21 NNW RMY N/A 08/25   89/70/80/+10/0.00/783/97         17 SW  AERO 18 SW  RMY N/A 08/26   92/72/82/+12/0.00/765/95         19 WSW AERO 18 WSW RMY N/A 08/27   89/70/80/+10/T/626/78            30 ENE AERO 30 ENE RMY N/A 08/28   70/59/65/-5/0.02/296/37          34 ENE AERO 34 ENE RMY N/A 08/29   72/59/66/-4/T/016/02             20 S   AERO 21 S   RMY N/A 08/30   84/67/76/+7/0.00/246/31          25 SW  AERO 26 SW  RMY N/A 08/31   80/65/73/+4/0.00/371/47          27 WNW AERO 28 WNW RMY N/A RECORDS FOR THE MONTH 08/22 NEW PEAK GUST RECORD OF 47 MPH,       BEATING THE OLD RECORD OF 44 MPH IN 1987 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/-7/1.47/.../..          34 NNE AERO 37 NNE RMY N/A     09/02   71/55/63/-6/2.53/.../..          49 ENE AERO 52 ENE RMY N/A 09/03   72/52/62/-6/0.00/.../..          23 NW  AERO 23 NW  RMY N/A 09/04   76/55/66/-2/0.00/.../..          22 WNW AERO 21 WNW RMY N/A 09/05   72/60/66/-2/0.04/.../..          27 S   AERO 29 S   RMY N/A 09/06   80/61/71/+3/0.00/.../..          24 WNW AERO 25 WNW RMY N/A 09/07   The low since midnight is 57F, the daily normal low is 59F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) RECORDS FOR SEPTEMBER 7 HIGH 92F IN 2007, 2015 LOW 40F IN 1888 PRECIP 2.91 INCHES IN 1891 PEAK GUST 58e MPH W IN 1941 RECORDS FOR SEPTEMBER 8 HIGH 97F IN 2015 LOW 42F IN 1978 PRECIP 1.51 INCHES IN 2011 PEAK GUST 45 MPH S IN 2012 TODAY'S REPORT PREPARED BY: Matt Douglas