BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA THURSDAY, JUNE 10, 2021 ALL TIMES ARE IN EASTERN STANDARD TIME SUNRISE: 0405E SUNSET:  1920E A VERY NICE DAY ATOP GREAT BLUE HILL.... Today was much milder in comparison to days preceding. Average visibility was great at 75 miles with a cool north easterly breeze. Temperatures have stayed comfortable in the upper 60's!!! The high so far today is 70F, which is 3 degrees below the normal high of 73F. The low since midnight is 63F, which is 8 degrees above the daily normal low of 55F. PRELIMINARY STATS FOR MAY 2021 TEMPERATURE, Deg. F Avg. Max. 68.1 [+1.8] Avg. Min. 48.0 [+0.2] Mean      58.1 [+1.0] 24-hour corrected mean: 57.7 Max. for month: 87F on the 22nd, 23rd Min. for month: 38F on the 1st HEATING DEGREE DAYS Total heating units:    237 [-31] Total for the season:  5578 [-725] Total for last season: 5812 PRECIPITATION, Inches Total: 5.60 [+1.49] Greatest in 24 hrs: N/A WIND, mph Avg. uncorrected wind speed: 10.9 mph Avg. corrected wind speed:   11.4 mph Prevailing wind direction:   WNW [16%] Peak gust and direction:     44 ENE on the 29th SUNSHINE: Campbell-Stokes card minutes: 14478 minutes of a possible 26226 or 55% Astronomical total minutes: 14977 minutes of a possible 27188 or 55% Today's Observations: 7 A.M. Weather: Broken cirrostratus Temperature: 67F; Dew Point: 48F; Relative Humidity: 50% Wind: NE @ 11G21 kts Sea-level pressure: 30.06 in. Hg; rising steadily Visibility: 40 miles 6-hr Max temp: 68F 6-hr Min temp: 63F 24-hr Precip: 0.00 ins. BHO SA 1155 250 BKN 40 179/67/48/0411G21/006/ 8/008 51020 10068 20063 10 A.M. Weather: Broken cirrostratus Temperature: 67F; Dew Point: 40F; Relative Humidity: 37% Wind: NE @ 13G19 kts Sea-level pressure: 30.11 in Hg; falling then rising Visibility: 75 miles 3-hr Precip: 0.00 ins. BHO SA 1455 250 BKN 75 197/67/40/0513G19/011/ 8/008 53018 1 P.M. Weather: Broken cirrostratus, few cumulus Temperature: 67F, Dew point: 43F; Relative Humidity: 41% Wind: NE @ 9 kts Sea-level pressure: 30.10 in Hg; falling steadily Visibility: 75 miles 6-hr Max temp: 70F 6-hr Min temp: 66F 6-hr Precip: 0.00 ins. BHO SA 1755 250 BKN 75 193/67/43/0709/010/ FEW CU ALQDS/ 8/106 58004 10070 20066 SUMMARY FOR WEDNESDAY, JUNE 9, 2021 TEMPERATURE (DEGREES F) MAX.......88     NORMAL.....73 MIN.......70     NORMAL.....55 MEAN......79     NORMAL.....64 DEPARTURE FROM 30-YEAR (1981-2010) NORMAL.......+15 TOTAL DEPARTURE FOR THE MONTH...................+92 [+10.0 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL THRU JUN) TOTAL HEATING UNITS FOR YESTERDAY............... 0  DEPARTURE.......-3 TOTAL HEATING UNITS FOR THE MONTH............... 3  DEPARTURE......-34 TOTAL HEATING UNITS FOR THE SEASON............5581  DEPARTURE.....-759 TOTAL HEATING UNITS LAST SEASON TO DATE.......5835  DEPARTURE.....-254 COOLING DEGREE DAYS (SEASON JAN THRU DEC) TOTAL COOLING UNITS FOR YESTERDAY...............14  DEPARTURE......+11 TOTAL COOLING UNITS FOR THE MONTH...............77  DEPARTURE......+58 TOTAL COOLING UNITS FOR THE SEASON.............106  DEPARTURE......+63 TOTAL COOLING UNITS LAST SEASON TO DATE.........63  DEPARTURE......+43 PEAK WIND GUST (MPH):                      420C/Official..............21 N   @ 10:03 P.M.                      AEROVANE (south tower).....23 NNW @ 10:39 P.M.                      ASOS.......................22 NNW @  4:15 P.M.                      DAVIS #1...................22 NNW @  4:15 P.M.                      DAVIS #2 (south tower).....21 NNW @  9:29 P.M.                      RMY........................23     @ 10:13 P.M.                      VECTOR.....................25     @ 10:13 P.M.                      MERLIN.....................N/A FASTEST MILE: CONTACTING ANEMOMETER/OFFICIAL..................15 NNW @  9:54 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................15 NNW @ 10:03 P.M. MAXIMUM 2-MINUTE DAVIS #1 AVERAGE...............15 N   @ 10:03 P.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............15 N   @ 10:04 P.M. MAXIMUM 2-MINUTE RMY AVERAGE....................14 NNW @  9:01 P.M. MAXIMUM 2-MINUTE VECTOR AVERAGE.................15     @ 10:01 P.M. AVERAGE WIND SPEED AND DIRECTION:                      CONTACTING/OFFICIAL......7.7 NNW [185 total miles]                      ASOS.....................7.5                      DAVIS #1.................8.0 NNW                      DAVIS #2.................8.1 NNW                      RMY......................7.5 NNW                      VECTOR...................8.1 PRECIPITATION (INCHES) THROUGH THIS MORNING (EST): TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.......0.00  DEPARTURE....-0.16                              ASOS.............0.00 TOTAL PRECIPITATION FOR THE MONTH.............0.11  DEPARTURE....-1.38                              ASOS.............0.08 TOTAL PRECIPITATION FOR THE YEAR.............20.77  DEPARTURE....-3.38                               ASOS...........20.94 PRELIMINARY CLIMATE SUMMARY FOR MAY CALENDAR DAY DATA DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/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 05/01   62/38/50/-3/0.06/0.0/659/78       31 WNW  AERO 35 WNW  RMY 40 05/02   76/48/62/+9/0.01/0.0/220/26       41 SW   AERO 41 SW   RMY 46 05/03   67/48/58/+5/0.07/0.0/400/47       21 E    AERO 20 E    RMY 20 05/04   50/44/47/-7/0.78/0.0/000/00       36 NNE  AERO 32 NNE  RMY 37 05/05   48/44/46/-8/0.47/0.0/000/00       18 ESE  AERO 14 ESE  RMY 17 05/06   64/45/55/+1/0.00/0.0/780/91       33 NW   AERO 38 NNW  RMY 39 05/07   61/43/52/-3/0.00/0.0/516/60       28 ESE  AERO 22 ESE  RMY 26 05/08   54/40/47/-8/0.00/0.0/069/08       24 SSW  AERO 23 SSW  RMY 25 05/09   66/42/54/-1/T/0.0/579/67          30 SW   AERO 29 SW   RMY 34 05/10   60/45/53/-2/0.39/0.0/078/09       21 W    AERO 20 W    RMY 20 05/11   63/45/54/-2/0.00/0.0/764/88       38 WNW  AERO 41 WNW  RMY 41 05/12   65/41/53/-3/0.00/0.0/722/83       28 NW   AERO M  M    RMY 31 05/13   69/45/57/+1/0.00/0.0/759/87       22 WNW  AERO 21 WNW  RMY 21 05/14   76/49/63/+8/0.00/0.0/725/83       23 WNW  AERO 23 WNW  RMY 25 05/15   75/55/65/+8/0.01/0.0/569/65       24 SSE  AERO 26 SSE  RMY 26 05/16   78/54/66/+9/0.01/0.0/483/55       36 W    AERO 37 W    RMY 42 05/17   77/52/65/+8/0.00/0.0/722/82       20 SSW  AERO 21 SSW  RMY 21 05/18   81/54/68/+10/T/0.0/600/68         32 W    AERO 30 W    RMY 32 05/19   75/55/65/+7/0.00/0.0/778/88       25 NE   AERO 23 NNE  RMY 27 05/20   75/52/64/+6/0.00/0.0/842/95       18 ESE  AERO 18 ESE  RMY 19 05/21   78/50/64/+5/T/0.0/524/59          23 S    AERO 22 S    RMY 26 05/22   87/56/72/+13/T/0.0/285/32         25 WNW  AERO 21 WNW  RMY 24 05/23   87/58/73/+14/T/0.0/687/77         38 NNW  AERO 37 NNW  RMY 40 05/24   70/49/60/+1/0.00/0.0/839/94       30 S    AERO 35 S    RMY 33 05/25   75/47/61/+1/0.00/0.0/761/85       31 SW   AERO 35 SW   RMY 34 05/26   86/57/72/+12/0.21/0.0/736/82      30 S    AERO 36 S    RMY 35 TSTM 05/27   79/57/68/+8/0.02/0.0/691/77       25 N    AERO 25 WNW  RMY 27 05/28   58/43/51/-10/1.00/0.0/162/18      28 ENE  AERO 32 ENE  RMY 27 05/29   46/42/44/-17/1.50/0.0/000/00      44 ENE  AERO 47 ENE  RMY 50 05/30   46/45/46/-15/0.87/0.0/000/00      37 NE   AERO 40 NE   RMY 40 05/31   57/46/52/-9/0.20/0.0/027/03       22 NNE  AERO 25 WNW  RMY 25 RECORDS FOR THE MONTH: Low maximum on the 30th of 46F, beating the old record of 51F set in 1996 PRELIMINARY CLIMATE SUMMARY FOR JUNE 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 06/01   74/50/62/0/0.00/.../..            20 WSW  AERO 24 WSW  RMY 22 06/02   80/55/68/+6/0.00/.../..           28 S    AERO 25 S    RMY 28 06/03   73/56/65/+3/0.01/.../..           29 SSW  AERO 29 SSW  RMY 29 06/04   77/61/69/+6/0.02/.../..           23 SW   AERO 25 WSW  RMY 25 TSTM 06/05   87/60/74/+11/0.00/.../..          32 SSW  AERO 37 SSW  RMY 35 06/06   91/69/80/+17/0.00/.../..          30 WSW  AERO 31 WSW  RMY 32 06/07   92/69/81/+17/0.00/.../..          31 SSW  AERO 35 SSW  RMY 34 06/08   92/69/81/+17/..../.../..          24 WSW  AERO 25 WSW  RMY 27 06/09   88/70/79/+15/..../.../..          21 N    AERO 23 NNW  RMY 23 06/10   The low since midnight is 63F, the daily normal low is 56F   DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) RECORDS FOR JUNE 10 HIGH 98F IN 2008 LOW 42F IN 1913, 1920 PRECIP 2.51 INCHES IN 1931 PEAK GUST 60e MPH NW IN 1941 RECORDS FOR JUNE 11 HIGH 92F IN 1973, 1984, 1997 LOW 40F IN 1972 PRECIP 2.66 INCHES IN 1922 PEAK GUST 43e MPH S IN 1945 TODAY'S REPORT PREPARED BY: Benjamin Turner