BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA WEDNESDAY, JUNE 9, 2021 ALL TIMES ARE IN EASTERN STANDARD TIME SUNRISE: 0406E SUNSET:  1920E SLIGHTLY LESS HOT WITH SOME CUMULUS BUILDING IN THE AFTERNOON.... Today was hot and humid especially in the morning hours, where the humidity was 97% with a temperature of 72F at 7 A.M. Visibility cleared up a little bit, giving us a maximum visibility of 40 miles so far today. Wind is light and northwesterly with a max gust of 19 mph. We observed some building cumulus to the north and west at the 1 P.M. observation, but not to the extent that we had yesterday at the same time. The high so far today is 87F, which is 14 degrees above the normal high of 73F. The low since midnight is 70F, which is 15 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 cumulus, altocumulus and cirrus Temperature: 72F; Dew Point: 71F; Relative Humidity: 97% Wind: W @ 7 kts Sea-level pressure: 29.94 in. Hg; falling unsteadily Visibility: 15 miles, thin fog 6-hr Max temp: 72F 6-hr Min temp: 70F 24-hr Precip: 0.08 ins. BHO SA 1155 40 BKN 100 BKN 250 BKN 15 140/72/71/2807/994/ THN F ALQDS/ 8/881 70008 56005 10072 20070 10 A.M. Weather: Broken cumulus, altocumulus and cirrus Temperature: 81F; Dew Point: 72F; Relative Humidity: 74% Wind: NW @ 9G15 kts Sea-level pressure: 29.96 in Hg; falling then rising Visibility: 40 miles 3-hr Precip: 0.00 ins. BHO SA 1455 40 BKN 100 BKN 250 BKN 40 146/81/72/3109G15/996/ 8/881 51006 1 P.M. Weather: Broken cumulus congestus and cirrocumulus Temperature: 84F, Dew point: 71F; Relative Humidity: 66% Wind: NW @ 6 kts, light Sea-level pressure: 29.95 in Hg; falling steadily Visibility: 35 miles, hazy 6-hr Max temp: 87F 6-hr Min temp: 72F 6-hr Precip: 0.00 ins. BHO SA 1755 40 BKN 250 BKN 35 143/84/71/3106/995/ HAZY WND LGT/ 8/209 58003 10087 20072 SUMMARY FOR TUESDAY, JUNE 8, 2021 TEMPERATURE (DEGREES F) MAX.......92     NORMAL.....73 MIN.......69     NORMAL.....55 MEAN......81     NORMAL.....64 DEPARTURE FROM 30-YEAR (1981-2010) NORMAL.......+17 TOTAL DEPARTURE FOR THE MONTH...................+77 [+9.4 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL THRU JUN) TOTAL HEATING UNITS FOR YESTERDAY............... 0  DEPARTURE.......-4 TOTAL HEATING UNITS FOR THE MONTH............... 3  DEPARTURE......-30 TOTAL HEATING UNITS FOR THE SEASON............5581  DEPARTURE.....-755 TOTAL HEATING UNITS LAST SEASON TO DATE.......5835  DEPARTURE.....-254 COOLING DEGREE DAYS (SEASON JAN THRU DEC) TOTAL COOLING UNITS FOR YESTERDAY...............16  DEPARTURE......+14 TOTAL COOLING UNITS FOR THE MONTH...............63  DEPARTURE......+47 TOTAL COOLING UNITS FOR THE SEASON..............92  DEPARTURE......+52 TOTAL COOLING UNITS LAST SEASON TO DATE.........59  DEPARTURE......+33 PEAK WIND GUST (MPH):                      420C/Official..............24 WSW @  5:06 P.M.                      AEROVANE (south tower).....25 WSW @  5:07 P.M.                      ASOS.......................25 SW  @  5:06 P.M.                      DAVIS #1...................26 SW  @  5:05 P.M.                      DAVIS #2 (south tower).....26 SW  @  5:05 P.M.                      RMY........................27     @  5:04 P.M.                      VECTOR.....................32     @  5:05 P.M.                      MERLIN.....................28 FASTEST MILE: CONTACTING ANEMOMETER/OFFICIAL..................18 WSW @  5:06 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................18 SW  @  5:07 P.M. MAXIMUM 2-MINUTE DAVIS #1 AVERAGE...............19 WSW @  5:05 P.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............20 SW  @  5:06 P.M. MAXIMUM 2-MINUTE RMY AVERAGE....................17 WSW @  5:04 P.M. MAXIMUM 2-MINUTE VECTOR AVERAGE.................20     @  5:04 P.M. AVERAGE WIND SPEED AND DIRECTION:                      CONTACTING/OFFICIAL......9.5 WSW [228 total miles]                      ASOS.....................9.4                      DAVIS #1................10.0 WSW                      DAVIS #2................10.0 WSW                      RMY......................9.4 WSW                      VECTOR...................9.8 PRECIPITATION (INCHES) THROUGH THIS MORNING (EST): TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.......0.08  DEPARTURE....-0.09                              ASOS.............0.05 TOTAL PRECIPITATION FOR THE MONTH.............0.11  DEPARTURE....-1.22                              ASOS.............0.08 TOTAL PRECIPITATION FOR THE YEAR.............20.77  DEPARTURE....-3.22                               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   The low since midnight is 70F, the daily normal low is 55F   RECORDS FOR THE MONTH: 06/07: NEW RECORD DAILY HIGH MINIMUM TEMPERATURE OF 69F, SURPASSES PREVIOUS RECORD OF 66F SET IN 1922 AND 1953   DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) RECORDS FOR JUNE 9 HIGH 94F IN 2008 LOW 40F IN 1980 PRECIP 2.08 INCHES IN 1931 PEAK GUST 67 MPH NW IN 1973 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 TODAY'S REPORT PREPARED BY: Benjamin Turner