BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA TUESDAY, JUNE 16, 2020 ALL TIMES ARE IN EASTERN STANDARD TIME SUNSHINE AND GOOD VISIBILITY ATOP GREAT BLUE HILL... Scattered clouds in the morning clearing as they day progressed with visibility staying at 65 miles throughout the day. Temperatures were in the mid to high 60s during the observation period peaking at 73 degrees before the 1 P.M. observation. The high so far today is 73 degrees, this is 2 degrees below the daily normal high of 75F. The low since midnight is 54F, which is 3 degrees lower than the daily normal low of 57F. PRELIMINARY STATS FOR MAY 2020 TEMPERATURE, Deg. F Avg. Max. 67.2 [+0.9] Avg. Min. 45.8 [-2.0] Mean 56.5 [-0.6] 24-hour corrected mean: 56.1 Max. for month: 84F on the 27th Min. for month: 31F on the 10th HEATING DEGREE DAYS Total heating units: 291 [+21] Total for the season: 5812 [-491] Total for last season: 5432 COOLING DEGREE DAYS Total cooling units: 32 [+10] Total for the season: 32 [+8] Total for last season: 8 PRECIPITATION, Inches Total: 2.75 [-1.36] Greatest in 24 hrs: 0.94 ins. on the 1st SNOWFALL, Inches Total: Trace Greatest in 24 hrs: Trace on the 9th WIND, mph Avg. uncorrected wind speed: 12.3 mph Avg. corrected wind speed: 12.7 mph Prevailing wind direction: W [16%] Peak gust and direction: 52 W on the 9th SUNSHINE: Campbell-Stokes card minutes: 16248 minutes of possible 26226 or 62% Astronomical total minutes: 16872 minutes of possible 27210 or 62% Today's Observations: 7 A.M. Weather: Scattered Cirrus Temperature: 63F; Dew Point: 51F; Relative Humidity: 66% Wind: NNE at 7 kts Sea-level pressure: 30.42 ins. Hg: steady, then rising Visibility: 65 miles, distant haze 6-hr Max temp: 56F 6-hr Min temp: 54F 24-hr Precip: 0.00 ins 24-hr Snowfall: 0.0 ins. BHO SA 1155 250 SCT 65 303/63/51/0207/042/ DSNT HZ ALQDS/ 8/001 53008 10063 20054 10 A.M. Weather: Scattered Cirrus, few Cumulus Temperature: 70F; Dew Point: 51F; Relative Humidity: N/A Wind: ENE at 10G15 kts Sea-level pressure: 30.43 ins. Hg: rising, then steady Visibility: 65 miles, distant haze 3-hr Precip: 0.00 ins. 3-hr Snowfall: 0.0 ins. BHO SA 1455 250 SCT 65 307/70/51/0610G15/043/ FEW CU DSNT HZ ALQDS/ 8/101 51004 1 P.M. Weather: Few Cumulus, few Cirrus Temperature: 71F; Dew Point: 47F; Relative Humidity: N/A Wind: NE at 7 kts Sea-level pressure: 30.42 ins. Hg: steady, then rising Visibility: 65 miles 6-hr Max temp: 73F 6-hr Min temp: 63F 6-hr Precip: 0.00 ins. 6-hr Snowfall: 0.0 ins. BHO SA 1755 CLR 65 303/71/47/0507/042/ FEW CU FEW CI DSNT HZ ALQDS/ 8/101 58004 10073 20063 SUMMARY FOR MONDAY, JUNE 15, 2020 TEMPERATURE (DEGREES F) MAX.....67 NORMAL.....75 MIN.....53 NORMAL.....57 MEAN....60 NORMAL.....66 DEPARTURE FROM 30-YEAR NORMAL..................-6 TOTAL DEPARTURE FOR THE MONTH.................+19 [+1.3 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY................5 DEPARTURE....... -2 TOTAL HEATING UNITS FOR THE MONTH...............39 DEPARTURE.......-15 TOTAL HEATING UNITS FOR THE SEASON............5851 DEPARTURE......-505 TOTAL HEATING UNITS LAST SEASON TO DATE.......6252 DEPARTURE......-401 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY............... 0 DEPARTURE....... -3 TOTAL COOLING UNITS FOR THE MONTH...............42 DEPARTURE........+5 TOTAL COOLING UNITS FOR THE SEASON..............74 DEPARTURE.......+13 TOTAL COOLING UNITS LAST SEASON TO DATE.........31 DEPARTURE.......+43 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................21 NE AT 10:08 A.M. AERO.........................16 ENE AT 11:02 A.M. ASOS.........................21 NE AT 10:08 A.M. DAVIS........................21 ENE AT 10:00 A.M. RMY 20 FASTEST MILE FOR YESTERDAY......................15 E AT 2:36 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................15 ENE AT 2:46 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................15 NE AT 12:01 A.M. AVERAGE WIND SPEED AND DIRECTION...............7.6 NE ASOS........................8.2 DAVIS.......................8.2 ENE [66 deg.] 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..........1.91 DEPARTURE......-0.52 ASOS..............1.91 TOTAL PRECIPITATION FOR THE YEAR..........21.70 DEPARTURE......-3.39 ASOS.............22.22 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/+5/0.94/0.0/000/00 46 SSE AERO 44 SSE RMY N/A 05/02 70/42/56/+3/T/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/-6/0.33/0.0/328/38 31 W AERO 32 W RMY N/A 05/09 44/32/38/-17/0.12/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/T/0.0/831/95 29 W AERO 26 W RMY 27 05/15 78/50/64/+7/0.82/0.0/535/61 40 WSW AERO 40 WSW RMY 43 TSTM 05/16 69/47/58/+1/0.12/0.0/730/83 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/-4/0.02/0.0/072/08 18 ENE AERO 18 ENE RMY N/A 05/26 82/56/69/+9/0.00/0.0/727/81 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/+9/0.02/0.0/027/03 33 SSW AERO 33 S RMY 33 05/29 78/66/72/+11/0.02/0.0/072/08 41 SSW AERO 41 SSW RMY 43 05/30 79/63/71/+10/0.12/0.0/713/79 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/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/.../.. 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/.../.. 26 W AERO 25 W RMY 27 06/13 71/53/62/-3/0.00/.../.. 21 WNW AERO 20 WNW RMY N/A 06/14 67/49/58/-8/0.00/.../.. 21 E AERO 21 ENE RMY 21 06/15 67/53/60/-6/5/0/.../.. 21 NE AERO 16 ENE RMY 20 06/16 The low since midnight is 54F, the daily normal low is 57F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JUNE 16 HIGH 92F IN 1891, 1967 LOW 44F IN 1926 PRECIP 2.17 INS IN 1931 PEAK GUST 55 MPH W IN 1958 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 TODAY'S REPORT PREPARED BY: Nicholas Rousseau