BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, JUNE 23, 2018   ALL TIMES ARE IN EASTERN STANDARD TIME COOL TEMPERATURES AND LIGHT PRECIPITATION Yesterday's cooler temperatures made the first below normal day in over a week. A maximum of 75F occurred just after 2:00 P.M. EST, and a minimum of 56F occurred early that morning. The average temperature of 66F is 2F below the normal average temperature for June 22. Temperatures have been even cooler today. A maximum of only 66F was measured by the 1:00 P.M. observation, which is 11F below the normal maximum temperature for this time of year. Temperatures began to drop after this, as it was only 59F at 1:00 P.M.. The minimum so far for the day of 57F occurred just before 3:00 A.M.. Skies have been overcast all day, with layers of stratus and altostratus. There has been a trace of precipitation with short periods of very light rain. Visibility this morning was excellent at 70 miles, considering that there was distant fog. By 10:00 A.M., the visibility decreased to just 20 miles in most of the area. At the 1:00 P.M. observation, visibility was only at 5 miles due to fog and a light drizzle. Today's Observations: 7 A.M. Weather: Broken status, overcast altostratus Temperature: 60F; Dew Point: 52F; Wind: E at 10G14 kts Sea-level pressure: 30.01 ins. Hg, falling, then more quickly Visibility: 70 miles, distant fog in all directions 6-hr Max temp: 60F 6-hr Min temp: 57F 24-hr Precip: Trace BHO SA 1155 E062 BKN E180 OVC 70 162/60/52/0910G14/001/ DSNT FG  ALQDS/ 8/62/ 58009 MANUAL 6000/ 10060 20057 10 A.M. Weather: Broken stratus, overcast altostratus Temperature: 63F; Dew Point: 54F; Wind: ESE at 8 kts Sea-level pressure: 29.97 ins. Hg, falling, then more quickly Visibility: 20 miles, except 50 miles SE-SW, distant fog in all directions 3-hr Precip: 0.00 ins BHO SA 1455 E062 BKN E150 OVC 20 150/63/54/1108/997/ VSBY SE-SW 50 DSNT FG ALQDS/ 8/62/ 58012 1 P.M. Weather: Light drizzle, overcast stratus Temperature: 59F; Dew Point: 55F; Wind: NE at 8G14 kts Sea-level pressure: 29.92 ins. Hg, falling, then more quickly Visibility: 5 miles, foggy 6-hr Max temp: 72F 6-hr Min temp: 62F 6-hr precip: Trace BHO SA 1755 E007 OVC L-F5 132/59/55/0508G14/992/ 8/6// 58018  MANUAL 6000/ 10066 20059 SUMMARY FOR FRIDAY, JUNE 22, 2018 TEMPERATURE (DEGREES F) MAX.....75   NORMAL.....77 MIN.....56   NORMAL.....59 MEAN....66   NORMAL.....68 DEPARTURE FROM 30-YEAR NORMAL.........................-2 TOTAL DEPARTURE FOR THE MONTH.........................-1 [-0.3 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............0   DEPARTURE...........-1 TOTAL HEATING UNITS FOR THE MONTH.............62   DEPARTURE...........-4 TOTAL HEATING UNITS FOR THE SEASON..........5909   DEPARTURE.........-460 TOTAL HEATING UNITS LAST SEASON TO DATE.....5724   DIFFERENCE........+185 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY...............1   DEPARTURE..........-3 TOTAL COOLING UNITS FOR THE MONTH..............61   DEPARTURE..........-3 TOTAL COOLING UNITS FOR THE SEASON............123   DEPARTURE.........+35 TOTAL COOLING UNITS LAST SEASON TO DATE.......155   DEPARTURE.........-32 PEAK GUST AND AVERAGE WIND SPEED (MPH)  PEAK WIND GUST FOR YESTERDAY....................24 ESE AT  4:43 P.M.                    AERO.........................22 ESE AT  4:42 P.M.                    ASOS.........................223 SE AT  4:43 P.M.                    DAVIS........................25 M AT 4:43 P.M.** RMY 24 FASTEST MILE FOR YESTERDAY......................16 S AT  6:28 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................16 S AT  6:29 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................16 M AT  4:43 P.M.** AVERAGE WIND SPEED AND DIRECTION...............8.0 ENE                    ASOS........................8.7                    DAVIS.......................7.9 **Davis direction malfunctioning  PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.11                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........1.13  DEPARTURE......-2.26                          ASOS..............1.15   TOTAL PRECIPITATION FOR THE YEAR..........28.45  DEPARTURE......+2.58                          ASOS.............30.02 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 6/01 78/62/70/+8/T/009/01            21 S   AERO 21 S   RMY N/A 6/02 79/54/67/+5/T/353/39            26 ENE AERO 25 ENE RMY 27 6/03 59/45/52/-10/0.00/816/90        28 ENE AERO 25 ENE RMY N/A   6/04 52/45/49/-14/0.82/000/00        29 ENE AERO 26 ENE RMY 29 6/05 64/47/56/-7/0.19/173/19         24 N   AERO 21 N   RMY 23  TSTM   6/06 66/50/58/-5/0.00/373/41         23 S   AERO 21 S   RMY 22 6/07 69/50/60/-4/0.00/282/31         25 S   AERO 25 S   RMY 27  6/08 79/52/66/+2/0.00/684/75         20 SW  AERO 17 SW  RMY 18 6/09 79/58/69/+5/0.00/767/84         22 W   AERO 21 W   RMY 22 6/10 72/56/64/-1/0.00/593/65         20 S   AERO 18 S   RMY 17 6/11 68/51/60/-5/0.00/594/65         21 ENE AERO 20 SSW RMY N/A 6/12 77/49/63/-2/0.00/814/89         37 SW  AERO 37 SW  RMY 39 6/13 74/56/65/0/T/284/31             35 SW  AERO 36 SW  RMY 36 6/14 77/61/69/+3/0.00/495/54         35 W   AERO 36 WNW RMY 37 6/15 68/53/61/-5/0.01/266/29         17 NNW AERO 16 WNW RMY 19 6/16 83/54/69/+3/0.00/.../..         25 NNW AERO 24 NNW RMY 25 6/17 86/63/75/+8/0.00/.../..         23 S   AERO 22 S   RMY N/A 6/18 86/64/75/+8/0.10/.../..         37 SSW AERO 37 SSW RMY 40  TSTM 6/19 81/64/73/+6/0.01/.../..         31 WSW AERO 32 WSW RMY 32  6/20 81/58/70/+2/0.00/.../..         22 W   AERO 21 W   RMY 23  6/21 81/62/72/+4/0.00/.../..         22 E   AERO 18 E   RMY 21  6/22 75/56/66/-2/..../.../..         24 ESE AERO 22 ESE RMY 24 6/23 Low temp since midnight is 57F; normal low is now 59F DAILY RECORDS FOR JUNE 2018 None so far. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JUNE 24 HIGH 91F IN 1914,1976,2013 LOW 40F IN 1932 PRECIP 2.80 INS IN 1929 PEAK GUST 54 MPH WNW IN 2010 RECORDS FOR JUNE 23 HIGH 93F IN 1888 LOW 45F IN 1885 PRECIP 0.70 INS IN 2006 PEAK GUST 63 MPH SE IN 1972 (AGNES) TODAY'S REPORT PREPARED BY: Lizzy Suzedell