BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA THURSDAY, JUNE 17, 2021 ALL TIMES ARE IN EASTERN STANDARD TIME SUNRISE: 0406E SUNSET:  1924E ANOTHER NICE DAY WITH EVEN BETTER VISIBILITY AND A COOL NORTHWESTERLY BREEZE.... Today has been almost clear with some cumulus and cirrus clouds. Temperatures are on the cooler side, and the visibility is up to 80 miles. Humidity is low with a value of 35% being measured at the 1 P.M. observation. Wind is northwesterly with frequent gusts near 20 mph. This is keeping the region cool and dry, yielding incredible weather for outdoor recreation. The high so far today is 74F, which is 2 degrees below the normal high of 76F. The low since midnight is 52F, which is 6 degrees below the daily normal low of 58F. 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: 2.50 ins. on the 28th-29th 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: Few cirrus Temperature: 60F; Dew Point: 47F; Relative Humidity: 61% Wind: WNW @ 7 kts Sea-level pressure: 29.94 in. Hg; rising steadily Visibility: 80 miles 6-hr Max temp: 60F 6-hr Min temp: 52F 24-hr Precip: 0.00 ins. BHO SA 1155 CLR 80 138/60/47/2907/994/ FEW CI ALQDS/ 8/002 53009 10060 20052 10 A.M. Weather: Few cumulus, cirrus Temperature: 70F; Dew Point: 45F; Relative Humidity: 40% Wind: W @ 9G15 kts Sea-level pressure: 29.95 in Hg; rising steadily Visibility: 80 miles 3-hr Precip: 0.00 ins. BHO SA 1455 CLR 80 140/70/45/2709G15/995/ FEW CU/CI ALQDS/ 8/102 50002 1 P.M. Weather: Few cumulus and cirrostratus Temperature: 73F, Dew point: 44F; Relative Humidity: 35% Wind: NNW @ 8G16 kts Sea-level pressure: 29.93 in Hg; falling, then steady Visibility: 75 miles 6-hr Max temp: 74F 6-hr Min temp: 60F 6-hr Precip: 0.00 ins. BHO SA 1755 CLR 75 133/73/44/3308G16/993/ FEW CU/CS ALQDS/ 8/108 58007 10074 20060 SUMMARY FOR WEDNESDAY, JUNE 16, 2021 TEMPERATURE (DEGREES F) MAX.......73     NORMAL.....73 MIN.......56     NORMAL.....56 MEAN......65     NORMAL.....65 DEPARTURE FROM 30-YEAR (1981-2010) NORMAL........-1 TOTAL DEPARTURE FOR THE MONTH...................+84 [+5.1 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL THRU JUN) TOTAL HEATING UNITS FOR YESTERDAY............... 0  DEPARTURE.......-2 TOTAL HEATING UNITS FOR THE MONTH...............16  DEPARTURE......-40 TOTAL HEATING UNITS FOR THE SEASON............5594  DEPARTURE.....-765 TOTAL HEATING UNITS LAST SEASON TO DATE.......5851  DEPARTURE.....-258 COOLING DEGREE DAYS (SEASON JAN THRU DEC) TOTAL COOLING UNITS FOR YESTERDAY................0  DEPARTURE.......-3 TOTAL COOLING UNITS FOR THE MONTH...............85  DEPARTURE......+45 TOTAL COOLING UNITS FOR THE SEASON.............114  DEPARTURE......+50 TOTAL COOLING UNITS LAST SEASON TO DATE.........74  DEPARTURE......+40 PEAK WIND GUST (MPH):                      420C/Official..............27 NNW @  5:16 A.M.                      AEROVANE (south tower).....31 NNW @  6:30 A.M.                      ASOS.......................27 NNW @  4:35 A.M.                      VECTOR.....................28     @  6:04 A.M.                      DAVIS #1...................26 NNW @  5:15 A.M.                      DAVIS #2 (south tower).....27 NNW @  6:30 A.M.                      RMY........................27     @  4:33 A.M.                      MERLIN.....................N/A FASTEST MILE: CONTACTING ANEMOMETER/OFFICIAL..................17 NNW @  5:16 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................17 NNW @  5:16 A.M. MAXIMUM 2-MINUTE VECTOR AVERAGE.................18     @  5:15 A.M. MAXIMUM 2-MINUTE DAVIS #1 AVERAGE...............18 NNW @  5:15 A.M MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............18 NW  @  1:16 P.M. MAXIMUM 2-MINUTE RMY AVERAGE....................17 N   @  5:15 A.M. AVERAGE WIND SPEED AND DIRECTION:                      CONTACTING/OFFICIAL......10.8 NW [260 total miles]                      ASOS.....................10.7                      VECTOR...................10.9                      DAVIS #1.................11.2 NW                      DAVIS #2.................11.3 NW                      RMY......................10.9 PRECIPITATION (INCHES) THROUGH THIS MORNING (EST): TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.......0.00  DEPARTURE....-0.15                              ASOS.............0.00 TOTAL PRECIPITATION FOR THE MONTH.............1.30  DEPARTURE....-1.28                              ASOS.............1.25 TOTAL PRECIPITATION FOR THE YEAR.............21.96  DEPARTURE....-3.28                               ASOS...........22.11 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   74/50/62/0/0.00/425/47            20 WSW  AERO 24 WSW  RMY 22 06/02   80/55/68/+6/0.00/553/61           28 S    AERO 25 S    RMY 28 06/03   73/56/65/+3/0.01/073/08           29 SSW  AERO 29 SSW  RMY 29 06/04   77/61/69/+6/0.02/054/06           23 SW   AERO 25 WSW  RMY 25 TSTM 06/05   87/60/74/+11/0.00/801/88          32 SSW  AERO 37 SSW  RMY 35 06/06   91/69/80/+17/0.00/819/90          30 WSW  AERO 31 WSW  RMY 32 06/07   92/69/81/+17/0.00/519/57          31 SSW  AERO 35 SSW  RMY 34 06/08   92/69/81/+17/0.06/.../..          24 WSW  AERO 25 WSW  RMY 27 TSTM 06/09   88/70/79/+15/0.02/.../..          21 N    AERO 23 NNW  RMY 23 06/10   70/53/62/-3/0.00/.../..           28 NE   AERO 28 NE   RMY 28 06/11   70/51/61/-4/0.13/.../..           21 SSE  AERO 22 SSE  RMY 22 06/12   72/53/63/-2/0.43/.../..           20 WSW  AERO 18 WSW  RMY 20 06/13   82/56/69/+4/0.00/.../..           26 SSW  AERO 29 SSW  RMY 29 06/14   65/56/61/-5/0.63/.../..           28 S    AERO 30 SSE  RMY 29 06/15   77/61/69/+3/T/.../..              18 NE   AERO 20 NE   RMY 18 TSTM 06/16   73/56/65/-1/0.00/.../..           27 NNW  AERO 31 NNW  RMY 27 06/17 The low since midnight is 52F, the daily normal low is 58F RECORDS FOR THE MONTH: High minimum on the 7th of 69F, beating the old 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 17 HIGH 93F IN 1894 LOW 44F IN 1920 PRECIP 2.79 INS 2001 (Sub-Tropical storm ALLISON) PEAK GUST 55e MPH S IN 1977 RECORDS FOR JUNE 18 HIGH 93F IN 1929, 1994 LOW 39F IN 1920 PRECIP 3.36 INS 1998 PEAK GUST 48e MPH W IN 1943 TODAY'S REPORT PREPARED BY: Benjamin Turner