BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA SATURDAY, SEPTEMBER 11, 2021 ALL TIMES ARE IN EASTERN STANDARD TIME SUNRISE: 0520E SUNSET:  1800E   MOSTLY CLEAR THIS MORNING WITH SOME CLOUDS MOVING IN DURING THE AFTERNOON HOURS.... Today we encountered some nice early fall weather. Visibility was 80 miles all day, which is exceptional considering it is only early September. A cool westerly breeze is coming in at an average of 10 mph with a peak so far of 20 mph. The sky was partly cloudy this morning, moving to mostly cloudy around noon. The high so far today is 74F, this is a degree below the daily normal maximum of 75F. The low so far today is 51F, which is 6 degrees below the daily normal minimum of 57F. Today marks the 20th anniversary of the terror attacks on 9/11/2001. We will never forget. May hope and unity prevail. ---------------------------------------------------- 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, few cumulus and cirrus Temperature: 55F; Dew Point: 49F; Relative Humidity: 81% Wind: W @ 9 kts Sea-level pressure: 1022.0 mb; 30.18 in. Hg; rising, then more slowly Visibility: 80 miles 6-hr Max temp: 55F 6-hr Min temp: 51F 24-hr Precip: Trace BHO SA 1155 CLR 80 220/55/49/2709/018/ FEW CU/CI ALQDS/ 8/101 70000 51023 10055 20051 10 A.M. Weather: Clear, few cumulus and cirrus Temperature: 68F; Dew Point: 55F; Relative Humidity: 62% Wind: W @ 5 kts, wind light Sea-level pressure: 1022.5 mb; 30.19 in Hg; rising unsteadily Visibility: 80 miles 3-hr Precip: 0.00 ins. BHO SA 1455 CLR 80 225/68/55/2705/019/ FEW CU/CI ALQDS WND LGT/ 8/101 52005 1 P.M. Weather: Scattered cumulus, broken cirrostratus Temperature: 73F, Dew point: 55F; Relative Humidity: 53% Wind: WSW @ 10G17 kts Sea-level pressure: 1021.6 mb; 30.17 in Hg; falling, then more rapidly Visibility: 80 miles 6-hr Max temp: 74F 6-hr Min temp: 55F 6-hr Precip: 0.00 ins. BHO SA 1755 50 SCT 250 BKN 80 216/73/55/2410G17/017/ 8/106 58009 10074 20055 SUMMARY FOR FRIDAY, SEPTEMBER 10, 2021 TEMPERATURE (DEGREES F) MAX.......74     NORMAL.....75 MIN.......55     NORMAL.....58 MEAN......65     NORMAL.....66 DEPARTURE FROM 30-YEAR (1991-2020) NORMAL.............-1 TOTAL DEPARTURE FOR THE MONTH........................-15 [-1.7 DEGREES/DAY] HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022) TOTAL HEATING UNITS FOR YESTERDAY................0  DEPARTURE........-2 TOTAL HEATING UNITS FOR THE MONTH................8  DEPARTURE........-5 TOTAL HEATING UNITS FOR THE SEASON..............36  DEPARTURE........+5 TOTAL HEATING UNITS LAST SEASON TO DATE..........4  DEPARTURE.......+32 COOLING DEGREE DAYS (SEASON: JAN 2021 THRU DEC 2021) TOTAL COOLING UNITS FOR YESTERDAY................0  DEPARTURE........-3 TOTAL COOLING UNITS FOR THE MONTH...............20  DEPARTURE.......-20 TOTAL COOLING UNITS FOR THE SEASON.............670  DEPARTURE.......+34 TOTAL COOLING UNITS LAST SEASON TO DATE........805  DEPARTURE......-135 PEAK WIND GUST (MPH):                      Official...................31 NW  @  1:27 P.M.                      AEROVANE (south tower).....36 S   @  5:19 P.M.                      VECTOR #2 (south tower)....33     @  1:27 P.M.                      DAVIS #2 (south tower).....31 WNW @  5:20 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..................23 NW  @  1:27 P.M. MAXIMUM 2-MINUTE VECTOR #2 AVERAGE..............22     @  1:28 P.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............22 NW  @  1:29 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.......11.0 NW [264 total miles]                      VECTOR #2.................11.7                      DAVIS #2..................11.5 NW                      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......TRACE  DEPARTURE....-0.13 TOTAL PRECIPITATION FOR THE MONTH.............4.98  DEPARTURE....+3.79 TOTAL PRECIPITATION FOR THE YEAR.............45.32  DEPARTURE....+9.78 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   78/57/68/+1/0.00/.../..          23 WSW AERO 22 WSW RMY N/A 09/08   81/61/71/+4/..../.../..          43 S   AERO 45 S   RMY N/A 09/09   71/64/68/+1/..../.../..          33 S   AERO 36 S   RMY N/A 09/10   74/55/65/-1/..../.../..          31 NW  AERO 32 WNW RMY N/A 09/11  The low since midnight is 51F, the daily normal low is 57F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) RECORDS FOR SEPTEMBER 11 HIGH 93F IN 1983, 2013 LOW 37F IN 1917 PRECIP 5.23 INCHES IN 1954 (HURRICANE EDNA) PEAK GUST 101 MPH NW IN 1954 (HURRICANE EDNA) 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) TODAY'S REPORT PREPARED BY: Benjamin Turner