BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA THURSDAY, JUNE 25, 2020 ALL TIMES ARE IN EASTERN STANDARD TIME DRY CONDITIONS WITH INCREASING WINDS ATOP THE GREAT BLUE HILL… Overnight conditions became much drier atop the Great Blue Hill as dew points temperatures had dropped into the high to mid-50s. Winds were light in the morning increasing as the day progressed with our max gust so far today being 25 MPH. Visibility was great staying at 75 miles throughout the day. The high so far today is 83 degrees, this is 5 degrees above the daily normal high of 78F. The low since midnight is 63F, which is 3 degrees above the daily normal low of 60F. Today's Observations: 7 A.M. Weather: Scattered cumulus, scattered altocumulus, scattered cirrostratus Temperature: 70F; Dew Point: 60F; Relative Humidity: 70% Wind: NW at 6 kts Sea-level pressure: 29.96 ins. Hg: Rising, then more slowly Visibility: 75 miles 6-hr Max temp: 70F 6-hr Min temp: 63F 24-hr Precip: 0.0 24-hr Frozen: 0.0 ins. BHO SA 1155 50 SCT 200 SCT 250 SCT 75 147/70/60/3106/996/ 8/116 51020 10070 20063 10 A.M. Weather: Broken cirrostratus, few cumulus Temperature: 77F; Dew Point: 54F; Relative Humidity: 45% Wind: SSW at N kts, Wind light and variable Sea-level pressure: 29.98 ins. Hg: Rising, then more slowly Visibility: 75 miles 3-hr Precip:  0.00 ins. 3-hr Frozen:   0.0 ins. BHO SA 1455 250 BKN 75 153/77/54/1902/998/ FEW CU ALQDS WND L/V/ 8/106 51006 1 P.M. Weather: Scattered cumulus, Broken cirrostratus Temperature: 82F; Dew Point: 55F; Relative Humidity: 39% Wind: WSW at 12G25 kts Sea-level pressure: 29.95 ins. Hg: falling, then more rapidly Visibility: 75 miles 6-hr Max temp: 83F 6-hr Min temp: 70F 6-hr Precip:  0.00 ins. 6-hr Frozen:   0.0 ins. BHO SA 1755 60 SCT 250 BKN 75 145/82/55/2412G25/995/ 8/106 58008 10083 20070 SUMMARY FOR THURSDAY, JUNE 24, 2020 TEMPERATURE (DEGREES F) MAX.....84   NORMAL.....78 MIN.....66   NORMAL.....60 MEAN....75   NORMAL.....69 DEPARTURE FROM 30-YEAR NORMAL................. +6 TOTAL DEPARTURE FOR THE MONTH.................+69 [+2.7 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY................0  DEPARTURE........-1 TOTAL HEATING UNITS FOR THE MONTH...............40  DEPARTURE.......-29 TOTAL HEATING UNITS FOR THE SEASON............5852  DEPARTURE......-519 TOTAL HEATING UNITS LAST SEASON TO DATE.......6254  DEPARTURE......-402 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY...............10  DEPARTURE........+5 TOTAL COOLING UNITS FOR THE MONTH..............116  DEPARTURE.......+43 TOTAL COOLING UNITS FOR THE SEASON.............148  DEPARTURE.......+51 TOTAL COOLING UNITS LAST SEASON TO DATE.........56  DEPARTURE.......+92 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................25 S   AT 1:56 P.M.                      AERO.........................24 S   AT  3:05 P.M.                     ASOS.........................26 S   AT  1:56 P.M.                    DAVIS........................26 S   AT  5:34 P.M. RMY 25 FASTEST MILE FOR YESTERDAY......................20 SSW AT  2:14 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................20 S   AT  2:17 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................18 S   AT  2:17 P.M. AVERAGE WIND SPEED AND DIRECTION...............10.9 S                                  ASOS....................... 11.0                    DAVIS...................... 10.5 SSW [203 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.12                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........2.74  DEPARTURE......-0.88                          ASOS..............2.74 TOTAL PRECIPITATION FOR THE YEAR..........22.53  DEPARTURE......-3.75                          ASOS.............23.05 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  64/42/53/-9/T/0.0/.../..            28 WNW  AERO 29 WNW RMY 28 06/02  72/45/59/-3/..../0.0/.../..         28 W    AERO 27 W   RMY 28 06/03  79/55/67/+5/T/0.0/.../..            29 W    AERO 28 W   RMY 26 06/04  87/62/75/+12/..../0.0/.../..        26 W    AERO 25 S   RMY N/A 06/05  80/65/73/+10/..../0.0/.../..        28 SSW  AERO 28 SSW RMY N/A TSTM 06/06  86/57/72/+9/..../0.0/.../..         55 SW   AERO 59 SW  RMY 59  TSTM 06/07  68/54/61/-3/0.00/0.0/.../..         24 NW   AERO 24 NW  RMY N/A 06/08  77/51/64/0/0.00/0.0/.../..          25 W    AERO 24 W   RMY 25 06/09  77/60/69/+5/T/0.0/.../..            23 E    AERO 21 E   RMY N/A 06/10  70/58/64/-1/T/0.0/.../..            25 E    AERO 24 E   RMY N/A 06/11  71/64/68/+3/0.62/0.0/.../..         40 S    AERO 40 S   RMY 42 06/12  82/63/73/+8/0.00/0.0/.../..         26 W    AERO 25 W   RMY 27 06/13  71/53/62/-3/0.00/0.0/.../..         21 WNW  AERO 20 WNW RMY N/A             06/14  67/49/58/-8/0.00/0.0/.../..         21 E    AERO 21 ENE RMY 21 06/15  67/53/60/-6/5/0/0.0/.../..          21 NE   AERO 16 ENE RMY 20 06/16  73/54/64/-2/0.00/0.0/.../..         18 E    AERO 18 E   RMY 18 06/17  78/57/68/+1/0.00/0.0/.../..         20 S    AERO 20 S   RMY 20 06/18  86/59/73/+6/0.00/0.0/.../..         22 S    AERO 22 SSW RMY 22 06/19  86/66/76/+9/0.00/0.0/.../..         22 S    AERO 22 S   RMY 21 06/20  90/65/78/+10/0.00/0.0/.../..        22 S    AERO 21 S   RMY 21 06/21  90/66/78/+10/0.83/0.0/.../..        33 ESE  AERO 35 ESE RMY 33  TSTM 06/22  77/65/71/+3/0.00/0.0/.../..         15 E    AERO 17 S   RMY 14 06/23  85/65/75/+7/0.00/0.0/.../..         27 S    AERO 24 S   RMY 26 06/24  84/66/75/+6/0.00/0.0/.../..         25 S    AERO 24 S   RMY 25 06/25 The low since midnight is 63F, the daily normal low is 60F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):   RECORDS FOR JUNE 25 HIGH 93F IN 1943,1980, 2005 LOW 47F IN 1903 PRECIP 1.38 INS IN 2012 PEAK GUST 51 MPH W IN 1960 RECORDS FOR JUNE 26 HIGH 96F IN 1952 LOW 45F IN 1986 PRECIP 1.52 INS IN 1945 PEAK GUST 48 MPH N IN 1998 TODAY'S REPORT PREPARED BY: Nicholas Rousseau