BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, JUNE 6, 2020 ALL TIMES ARE IN EASTERN STANDARD TIME PASSING STORM IN THE AFTERNOON LEFT SOME MUCH NEEDED RAIN ATOP GREAT BLUE HILL.... Today started off pretty conventional for a humid early summers' day. there was fog in the early morning and hazy conditions as the the day went on, leaving us with 25 miles of visibility at most. An approaching line of storms made the day much more interesting, occurring between 2:30 P.M. and 3:30 P.M. Multiple lightning strikes and flashes were witnessed before and throughout this time, as well as heavy rainfall. While hail was reported in areas north and west of the observatory, there was no hail seen here. Wind maxed out at around 60 mph, with rain amounting to over an inch for just that one hour. After the storm, we were left with a much better visibility of 70 miles, and a light rain still falling. The rain deficit as of this morning was 0.68 inches, with an annual deficit 3.55 inches below the normal amount.   The high so far today is 85 degrees, this is 13 degrees above the daily normal high of 72F. The low since midnight is 66F, which is 12 degrees above the daily normal low of 54F. Today's Observations: 7 A.M. Weather: Overcast stratus Temperature: 67F; Dew Point: 67F; Relative Humidity: 100% Wind: SSW at 10 kts   Sea-level pressure: 29.78 ins. Hg: falling steadily Visibility: 10 miles, fog 6-hr Max temp: 67F 6-hr Min temp: 66F 24-hr Precip:  0.01 ins. 24-hr Snowfall: 0.0 ins. BHO SA 1155 E20 OVC 10 086/67/67/2010/978/ THN FG ALQDS/ 8/6// 58003 10067 20066 10 A.M. Weather: Scattered cumulus, broken cirrostratus Temperature: 76F; Dew Point: 69F; Relative Humidity: 79% Wind: SW at 9G16 kts Sea-level pressure: 29.73 ins. Hg: falling Visibility: 25 miles, hazy 3-hr Precip:  0.00 ins. 3-hr Snowfall: 0.0 ins. BHO SA 1455 20 SCT 250 BKN 25 072/76/69/2309G16/973/ HAZY/ 8/102 58014 1 P.M. Weather: Broken cumulus, building to the west, broken cirrostratus Temperature: 85F; Dew Point: 68F; Relative Humidity: 57% Wind: SW at 8 kts Sea-level pressure: 29.65 ins. Hg: falling, then more rapidly Visibility: 25 miles, hazy 6-hr Max temp: 85F 6-hr Min temp: 67F 6-hr Precip:  0.00 ins. 6-hr Snowfall: 0.0 ins. BHO SA 1755 55 SCT 250 BKN 25 046/85/68/2208/965/ HAZY/ 8/208 58026 10085 20067 SUMMARY FOR FRIDAY, JUNE 5, 2020 TEMPERATURE (DEGREES F) MAX.....80   NORMAL.....72 MIN.....65   NORMAL.....54 MEAN....73   NORMAL.....63 DEPARTURE FROM 30-YEAR NORMAL.................+10 TOTAL DEPARTURE FOR THE MONTH.................+15 [+2.8 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY................0  DEPARTURE........-4 TOTAL HEATING UNITS FOR THE MONTH...............18  DEPARTURE........-4 TOTAL HEATING UNITS FOR THE SEASON............5830  DEPARTURE......-495 TOTAL HEATING UNITS LAST SEASON TO DATE.......6234  DEPARTURE......-404 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY...............8   DEPARTURE........+6 TOTAL COOLING UNITS FOR THE MONTH...............20  DEPARTURE........11 TOTAL COOLING UNITS FOR THE SEASON..............52  DEPARTURE.......+19 TOTAL COOLING UNITS LAST SEASON TO DATE.........12  DEPARTURE.......+40 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................28 SSW AT  3:35 A.M.                      AERO.........................28 SSW AT  3:35 A.M.                     ASOS.........................28 SSW AT  3:35 A.M.                    DAVIS........................28 SW  AT  3:33 A.M. RMY N/A FASTEST MILE FOR YESTERDAY......................22 SSW AT  3:36 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................22 SSW AT  3:36 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................22 SSW AT  3:35 A.M. AVERAGE WIND SPEED AND DIRECTION.................11.9 SSW                                  ASOS..........................12.3                    DAVIS.........................11.4 SW [214 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.01 DEPARTURE.......-0.16                          ASOS..............0.01 TOTAL PRECIPITATION FOR THE MONTH..........0.15  DEPARTURE......-0.68                          ASOS..............0.15 TOTAL PRECIPITATION FOR THE YEAR..........19.94  DEPARTURE......-3.55                          ASOS.............20.46 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  64/52/58/+5/..../0.0/000/00         46 SSE  AERO 44 SSE RMY N/A 05/02  70/42/56/+3/..../0.0/729/86         41 NW   AERO 40 NW  RMY N/A 05/03  78/55/67/+14/0.00/0.0/613/72        35 SSW  AERO 35 SSW RMY 36 05/04  72/45/59/+5/T/0.0/247/29            37 NW   AERO 40 WNW RMY 39   05/05  60/40/50/-4/0.00/0.0/821/96         31 NW   AERO 32 NW  RMY N/A 05/06  57/38/48/-6/T/0.0/498/58            24 ESE  AERO 22 ENE RMY 22 05/07  63/37/50/-5/0.00/0.0/576/67         30 WSW  AERO 29 WSW RMY N/A 05/08  57/40/49/-6/..../0.0/328/38         31 W    AERO 32 W   RMY N/A 05/09  44/32/38/-17/..../T/484/56          52 W    AERO 53 W   RMY 54 05/10  59/31/45/-10/0.00/0.0/763/88        46 W    AERO 46 W   RMY 49 05/11  65/43/54/-2/0.22/0.0/322/37         39 S    AERO 43 S   RMY 41 05/12  55/37/46/-10/0.00/0.0/801/92        37 W    AERO 37 W   RMY 37 05/13  59/32/46/-10/0.00/0.0/864/99        37 WNW  AERO 37 WNW RMY 38 05/14  70/40/55/-2/0.00/0.0/831/95         29 W    AERO 26 W   RMY 27 05/15  78/50/64/+7/..../0.0/535/61         40 WSW  AERO 40 WSW RMY 43 05/16  69/47/58/+1/..../0.0/730/83         31 NW   AERO 31 NW  RMY 32 05/17  67/47/57/0/0.00/0.0/132/15          22 SSW  AERO N/A    RMY 21 05/18  60/47/54/-4/T/0.0/053/06            24 W    AERO 22 ENE RMY N/A 05/19  56/45/51/-7/0.00/0.0/797/90         35 ENE  AERO 34 ENE RMY 32 05/20  63/43/53/-5/0.00/0.0/869/98         22 ESE  AERO 20 SE  RMY 19 05/21  76/42/59/0/0.00/0.0/862/97          26 S    AERO 25 S   RMY 25 05/22  82/50/66/+7/0.00/0.0/864/97         29 W    AERO 29 W   RMY 28 05/23  67/44/56/-3/0.02/0.0/187/21         42 ENE  AERO 43 ENE RMY 40 05/24  58/43/51/-8/T/0.0/822/92            27 ENE  AERO 24 ENE RMY N/A 05/25  66/46/56/-4/0.00/0.0/072/08         18 ENE  AERO 18 ENE RMY N/A 05/26  82/56/69/+9/0.00/0.0/215/24         21 S    AERO 21 S   RMY 21 05/27  84/59/72/+12/0.00/0.0/728/81        31 SSW  AERO 31 SSW RMY 31   05/28  77/63/70/+9/..../0.0/027/03         33 SSW  AERO 33 S   RMY 33 05/29  78/66/72/+11/..../.../072/08        41 SSW  AERO 41 SSW RMY 43 05/30  79/63/71/+10/..../.../713/79        30 S    AERO 30 S   RMY N/A 05/31  67/45/56/-5/0.00/0.0/805/89         33 WNW  AERO 33 WNW RMY 32 DAILY RECORDS FOR MAY 2020 5/13/2020: NEW RECORD LOW OF 32F, REPLACING 35F SET IN 1914 AND 2005 PRELIMINARY CLIMATE SUMMARY FOR JUNE 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 06/01  64/42/53/-9/T/0.0/.../..            28 WNW  AERO 29 WNW RMY 28 06/02  72/45/59/-3/..../.../..             28 W    AERO 27 W   RMY 28 06/03  79/55/67/+5/T/.../..                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/..../.../..            28 SSW  AERO 28 SSW RMY N/A TSTM 06/06 The low since midnight is 66F, the daily normal low is 54F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):   RECORDS FOR JUNE 6 HIGH 95F IN 1925 LOW 42F IN 1885, 1894, 1920, 1945 PRECIP 3.61 INS IN 2000 PEAK GUST 58 MPH NE IN 2000 RECORDS FOR JUNE 7 HIGH 93F IN 1999 LOW 40F IN 1932 PRECIP 4.01 INS IN 2006 PEAK GUST 58 MPH NE IN 1982 TODAY'S REPORT PREPARED BY: Benjamin Turner