BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA THURSDAY, SEPTEMBER 9, 2021 ALL TIMES ARE IN EASTERN STANDARD TIME SUNRISE: 0518E SUNSET:  1805E   LIGHT RAIN SO FAR TODAY WITH A COOL SOUTHERLY BREEZE.... Today featured light rain with very little in the way of visibility or temperature variation. The temperature and dew point were exactly 70F at each observation today. The rain total on the day is 0.11 inches, with 0.05 falling before 7 A.M. and 0.06 falling after. Wind is southerly at an average speed of 10 mph. The highest gust of 36 mph happened early on this morning.   Skies are overcast and the highest visibility seen so far is 8 miles.   The high so far today is 71F, this is 4 degrees below the daily normal maximum of 75F. The low so far today is 68F, which is 10 degrees above the daily normal minimum of 58F. ---------------------------------------------------- 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: Overcast stratus Temperature: 70F; Dew Point: 70F; Relative Humidity: 100% Wind: SSW @ 10G15 kts Sea-level pressure: 1010.4 mb; 29.84 in. Hg; rising unsteadily Visibility: 2 miles, fog 6-hr Max temp: 71F 6-hr Min temp: 68F 24-hr Precip: 0.05 ins. BHO SA 1155 30 OVC 2F 104/70/70/2010G15/984/ 8/6// 70005 52001 10071 20068 10 A.M. Weather: Light rain Temperature: 70F; Dew Point: 70F; Relative Humidity: 100% Wind: SSE @ 8G15 kts Sea-level pressure: 1009.9 mb; 29.83 in Hg; rising then falling Visibility: 2 miles, fog 3-hr Precip: 0.03 ins. BHO SA 1455 30 OVC 2R-F 099/70/70/1508G15/983/ 8/6// 6003/ 55005 1 P.M. Weather: Broken stratus, overcast nimbostratus Temperature: 70F, Dew point: 70F; Relative Humidity: 100% Wind: SSW @ 9 kts Sea-level pressure: 1009.9 mb; 29.83 in Hg; steady Visibility: 8 miles, fog 6-hr Max temp: 71F 6-hr Min temp: 69F 6-hr Precip: 0.06 ins. BHO SA 1755 30 BKN 110 OVC 8R-F 099/70/70/2009/983/ 8/62/ 6006/ 55000 10071 20069 SUMMARY FOR WEDNESDAY, SEPTEMBER 8, 2021 TEMPERATURE (DEGREES F) MAX.......81     NORMAL.....76 MIN.......61     NORMAL.....58 MEAN......71     NORMAL.....67 DEPARTURE FROM 30-YEAR (1991-2020) NORMAL............ +4 TOTAL DEPARTURE FOR THE MONTH........................-15 [-2.1 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........-2 TOTAL HEATING UNITS FOR THE SEASON..............36  DEPARTURE........+8 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...............17  DEPARTURE.......-16 TOTAL COOLING UNITS FOR THE SEASON.............667  DEPARTURE.......+38 TOTAL COOLING UNITS LAST SEASON TO DATE........789  DEPARTURE......-122 PEAK WIND GUST (MPH):                      Official...................43 S   @  4:38 P.M.                      AEROVANE (south tower).....45 S   @  4:38 P.M.                      VECTOR #2 (south tower)....47     @  4:38 P.M.                      DAVIS #2 (south tower).....45 S   @  4:14 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..................31 S   @  4:16 P.M. MAXIMUM 2-MINUTE VECTOR #2 AVERAGE..............30     @  4:14 P.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............32 S   @  4:15 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.......17.3 S  [416 total miles]                      VECTOR #2.................17.7                      DAVIS #2..................17.6 S                      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.......0.05  DEPARTURE....-0.06 TOTAL PRECIPITATION FOR THE MONTH.............4.09  DEPARTURE....+3.15 TOTAL PRECIPITATION FOR THE YEAR.............44.38  DEPARTURE....+9.14 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   The low since midnight is 68F, the daily normal low is 58F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) RECORDS FOR SEPTEMBER 9 HIGH 92F IN 2015 LOW 41F IN 1938 PRECIP 1.97 INCHES IN 1969 PEAK GUST 52 MPH WNW IN 1969, NW IN 1978 RECORDS FOR SEPTEMBER 10 HIGH 90F IN 1931,1989 LOW 41F IN 1956 PRECIP 5.60 INCHES IN 1999 (DAILY RECORD FOR SEPTEMBER) PEAK GUST 48 MPH NW IN 1972 TODAY'S REPORT PREPARED BY: Benjamin Turner