BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, JUNE 7, 2020 ALL TIMES ARE IN EASTERN STANDARD TIME COOL HUMID DAY ATOP GREAT BLUE HILL.... It was a cool humid day on top of the Great Blue Hill with increasing clouds into the afternoon hours. 1.14 inches of rain was observed at the 7 A.M observation from the thunderstorms that moved through yesterday afternoon. Wind was light and southwesterly with an average speed under 10 mph. Visibility stayed around 40 miles during the day. The high so far today is 65 degrees, this is 8 degrees below the daily normal high of 73F. The low since midnight is 54F, which is the same as the daily normal low of 54F. Today's Observations: 7 A.M. Weather: Broken stratus Temperature: 56F; Dew Point: 55F; Relative Humidity: 90% Wind: SW at 9 kts Sea-level pressure: 29.80 ins. Hg: Increasing, then steady Visibility: 40 miles 6-hr Max temp: 86F 6-hr Min temp: 54F 24-hr Precip: 1.14 ins. 24-hr Snowfall: 0.0 ins. BHO SA 1155 E40 BKN 45 094/56/55/3309/980/ 8/600 51016 70114 10086 20054 10 A.M. Weather: Overcast stratus Temperature: 60F; Dew Point: 55F; Relative Humidity: 73% Wind: SW at 9 kts Sea-level pressure: 29.84 ins. Hg: Increasing steadily Visibility: 35 miles 3-hr Precip: 0.00 ins. 3-hr Snowfall: 0.0 ins. BHO SA 1455 E35 OVC 38 106/60/55/3309/984/ 8/6// 52012 1 P.M. Weather: Broken stratus Temperature: 63F; Dew Point: 53F; Relative Humidity: 70% Wind: W at 6 kts Sea-level pressure: 29.85 ins. Hg: Increasing, then steady Visibility: 35 miles 6-hr Max temp: 65F 6-hr Min temp: 56F 6-hr Precip: 0.00 ins. 6-hr Snowfall: 0.0 ins. BHO SA 1755 E35 BKN 39 111/63/53/3606/985/ 8/600 51005 10065 20056 SUMMARY FOR SUNDAY, JUNE 6, 2020 TEMPERATURE (DEGREES F) MAX.....86 NORMAL.....72 MIN.....57 NORMAL.....54 MEAN....72 NORMAL.....63 DEPARTURE FROM 30-YEAR NORMAL.................+9 TOTAL DEPARTURE FOR THE MONTH................+24 [+3.8 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY................0 DEPARTURE........-7 TOTAL HEATING UNITS FOR THE MONTH...............18 DEPARTURE........-8 TOTAL HEATING UNITS FOR THE SEASON............5830 DEPARTURE......-499 TOTAL HEATING UNITS LAST SEASON TO DATE.......6234 DEPARTURE......-404 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY...............7 DEPARTURE........-1 TOTAL COOLING UNITS FOR THE MONTH...............27 DEPARTURE........16 TOTAL COOLING UNITS FOR THE SEASON..............59 DEPARTURE.......+24 TOTAL COOLING UNITS LAST SEASON TO DATE.........16 DEPARTURE.......+43 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................55 SW AT 2:54 P.M. AERO.........................59 SW AT 2:54 P.M. ASOS.........................59 W AT 2:54 P.M. DAVIS........................57 W AT 2:53 P.M. RMY 59 FASTEST MILE FOR YESTERDAY......................44 SW AT 2:53 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................40 W AT 2:59 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................44 W AT 2:54 P.M. AVERAGE WIND SPEED AND DIRECTION.................10.9 SSW ASOS..........................11.4 DAVIS.........................10.8 SW [236 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....1.14 DEPARTURE.......0.98 ASOS..............1.12 TOTAL PRECIPITATION FOR THE MONTH..........1.29 DEPARTURE......0.29 ASOS..............1.27 TOTAL PRECIPITATION FOR THE YEAR..........21.08 DEPARTURE......-2.58 ASOS.............21.58 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 86/57/72/+9/..../.../.. 55 SW AERO 59 SW RMY 59 TSTM 06/07 The low since midnight is 54F, the daily normal low is 55F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): 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 RECORDS FOR JUNE 8 HIGH 94F IN 1984 LOW 37F IN 1932 PRECIP 1.53 INS IN 1947 PEAK GUST 86e MPH WNW IN 1946 [Record for month] TODAY'S REPORT PREPARED BY: Nicholas Rousseau