BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA FRIDAY, OCTOBER 1ST, 2021 ALL TIMES ARE IN EASTERN STANDARD TIME SUNRISE: 0542E SUNSET:  1725E A SPECTACULAR AUTUMN DAY ATOP GREAT BLUE HILL.... Morning low of 44F was good for the lowest since May 29th, 2021 - marking our 2nd "step-down" as we cool off towards the winter solstice. Since bottoming out there in the mid-40s, we are experiencing a spectacular autumn day consisting of mostly sunny skies, temps rebounding into the low-60s, dew points in the mid-40s, and benign winds. If it can't be any more spectacular, visibility has been a stunning 80 miles since our first morning observation! The high so far today is 64F, 3 degrees below the normal max of 67F. The low since midnight is 44F, 6 degrees below the normal low of 50F. -------------------------------------------------------------- Today's Observations: 7 A.M. Weather: Clear Temperature: 46F; Dew Point: 43F; Relative Humidity: 88% Wind: NW @ 9G11 kts Sea-level pressure: 1021.9 mb; 30.18 in. Hg: rising, then rising more rapidly Visibility: 80 miles   6-hr Max temp: 46F 6-hr Min temp: 44F 24-hr Precip: 0.00 ins. BHO SA 1155 CLR 80 219/46/43/3109G11/018/ 8/000 53012 10046 20044 10 A.M. Weather: Clear (few cumulus all quads) Temperature: 59F; Dew Point: 46F; Relative Humidity: 62% Wind: NNW @ 10G16 kts Sea-level pressure: 1021.8 mb; 30.17 in Hg; rising then falling Visibility: 80 miles 3-hr Precip: 0.00 ins. BHO SA 1455 CLR 80 218/59/46/3310G16/017/ FEW CU ALQDS/ 8/100 58001 1 P.M. Weather: Scattered Cumulus Temperature: 62F, Dew point: 44F; Relative Humidity: 51% Wind: WNW @ 10G17 kts Sea-level pressure: 1020.9 mb; 30.15 in Hg; rising then falling Visibility: 80 miles 6-hr Max temp: 60F 6-hr Min temp: 49F 6-hr Precip: 0.00 ins. BHO SA 1755 50 SCT 80 209/62/44/2910G17/015/ 8/100 58009 10064 20046 SUMMARY FOR THURSDAY, SEPTEMBER 30, 2021 TEMPERATURE (DEGREES F) MAX.......60     NORMAL.....67 MIN.......46     NORMAL.....50 MEAN......53     NORMAL.....59 DEPARTURE FROM 30-YEAR (1991-2020) NORMAL............. -6 TOTAL DEPARTURE FOR THE MONTH.........................+40 [+1.1 DEGREES/DAY] HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022) TOTAL HEATING UNITS FOR YESTERDAY...............12  DEPARTURE........+5 TOTAL HEATING UNITS FOR THE MONTH...............46  DEPARTURE.......-54 TOTAL HEATING UNITS FOR THE SEASON..............74  DEPARTURE.......-44 TOTAL HEATING UNITS LAST SEASON TO DATE.........98  DEPARTURE.......-24 COOLING DEGREE DAYS (SEASON: JAN 2021 THRU DEC 2021) TOTAL COOLING UNITS FOR YESTERDAY................0  DEPARTURE........-1 TOTAL COOLING UNITS FOR THE MONTH...............62  DEPARTURE.......-12 TOTAL COOLING UNITS FOR THE SEASON.............712  DEPARTURE.......+42 TOTAL COOLING UNITS LAST SEASON TO DATE........830  DEPARTURE......-118 PEAK WIND GUST (MPH):                      Official...................22 NNW @ 12:36 P.M.                      AEROVANE (south tower).....21 NNW @ 12:36 P.M.                      VECTOR #2 (south tower)....23     @ 12:36 P.M.                      DAVIS #2 (south tower).....20 NNW @ 12:36 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..................15 NW   @  2:19 P.M. MAXIMUM 2-MINUTE VECTOR #2 AVERAGE..............15      @  2:19 P.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............15 NW   @  2:19 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........8.8 NW [210 total miles]                      VECTOR #2..................9.4                      DAVIS #2...................9.1 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.......0.00  DEPARTURE....-0.16 TOTAL PRECIPITATION FOR THE MONTH.............6.64  DEPARTURE....+2.58 TOTAL PRECIPITATION FOR THE YEAR.............46.98  DEPARTURE....+8.57 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/-7/1.47/000/00          34 NNE AERO 37 NNE RMY N/A     09/02   71/55/63/-6/2.53/322/41          49 ENE AERO 52 ENE RMY N/A 09/03   72/52/62/-6/0.00/735/94          23 NW  AERO 23 NW  RMY N/A 09/04   76/55/66/-2/0.00/757/97          22 WNW AERO 21 WNW RMY N/A 09/05   72/60/66/-2/0.04/008/01          27 S   AERO 29 S   RMY N/A 09/06   80/61/71/+3/0.00/557/72          24 WNW AERO 25 WNW RMY N/A 09/07   78/57/68/+1/0.00/732/95          23 WSW AERO 22 WSW RMY N/A 09/08   81/61/71/+4/0.00/646/84          43 S   AERO 45 S   RMY N/A 09/09   71/64/68/+1/0.90/000/00          33 S   AERO 36 S   RMY N/A 09/10   74/55/65/-1/0.04/595/78          31 NW  AERO 32 WNW RMY N/A 09/11   75/51/63/-3/0.00/730/96          24 SW  AERO 24 SW  RMY N/A 09/12   79/60/70/+4/0.00/591/78          33 SW  AERO 32 SW  RMY N/A 09/13   77/62/70/+5/0.06/559/74          22 NW  AERO 23 NW  RMY N/A 09/14   75/59/67/+2/0.00/444/59          23 S   AERO 25 S   RMY N/A 09/15   82/65/74/+9/T/539/72             32 SSW AERO 35 SSW RMY N/A 09/16   69/61/65/+1/0.27/037/05          24 ENE AERO 24 ENE RMY N/A TSTM       09/17   66/60/63/-1/0.02/000/00          22 NE  AERO 23 NE  RMY N/A 09/18   74/62/68/+5/0.04/207/28          17 WNW AERO 18 WNW RMY N/A TSTM 09/19   71/57/64/+1/0.15/619/84          23 NNE AERO 24 NNE RMY N/A 09/20   71/55/63/0/0.00/588/80           20 SE  AERO 20 SE  RMY N/A 09/21   75/55/65/+3/0.00/.../..          19 SSE AERO 20 SSE RMY N/A 09/22   75/65/70/+8/0.02/.../..          30 S   AERO 30 S   RMY N/A 09/23   78/65/72/+10/0.08/.../..         36 SSE AERO 37 SSE RMY N/A 09/24   75/62/69/+8/0.02/.../..          43 SSE AERO 45 SSE RMY N/A 09/25   74/59/67/+6/0.02/.../..          14 N   AERO 14 NNW RMY N/A 09/26   73/54/64/+4/0.57/.../..          33 WNW AERO 32 WNW RMY N/A 09/27   73/52/63/+3/T/.../..             30 SW  AERO 30 SW  RMY N/A 09/28   67/52/60/+1/0.40/.../..          27 SSW AERO 25 SSW RMY N/A TSTM 09/29   63/45/54/-5/0.00/.../..          25 NNW AERO 25 NNW RMY N/A 09/30   60/46/53/-6/.../.../..           22 NNW AERO 21 NNW RMY N/A 10/01   The low since midnight is 44F, the daily normal low is 50F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) RECORDS FOR OCTOBER 1 HIGH 85F IN 1927 LOW 30F IN 1992 PRECIP 1.63 INCHES IN 2014 PEAK GUST 68e MPH SSE IN 1977 RECORDS FOR OCTOBER 2 HIGH 85F IN 1968 LOW 29F IN 1899 PRECIP 1.75 INCHES IN 1984 PEAK GUST 52e MPH S IN 1952, 52 NNW IN 1984 TODAY'S REPORT PREPARED BY: Andrew Swanson