BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY TUESDAY, JUNE 12, 2018   ALL TIMES ARE IN EASTERN STANDARD TIME A HAZY AND WINDY DAY ON GREAT BLUE HILL.... We observed 70 miles of visibility this morning, being brought down to 40 miles by a distant haze by 10 A.M. Humidity has decreased from  60% this morning to 40% by the 1 P.M. observation. It has been breezy throughout the day, with frequent gusts over 20 mph. The peak gust so far today is 37 mph, observed at 12:41 P.M. The maximum temperature  by 1 P.M. is 76F, 2 degrees above the normal of 74F. The low since  midnight was 49F, 7 degrees below the daily normal of 56F.     Today's Observations: 7 A.M. Weather: Few cirrostratus in all directions Temperature: 58F; Dew Point: 44F; Wind: SW at 13G18 kts   Sea-level pressure: 30.20 ins. Hg, rising, then more rapidly Visibility: 70 miles 6-hr Max temp: 58F 6-hr Min temp: 49F 24-hr Precip: 0.00 ins. BHO SA 1155 CLR 70 227/58/44/2313G18/020/ FEW CS ALQDS/ 8/005  53005 10058 20049 10 A.M. Weather: Scattered cirrostratus Temperature: 70F; Dew Point: 47F; Wind: SW at 13G20 kts Sea-level pressure: 30.19 ins. Hg, falling, then more rapidly Visibility: 40 miles, distant haze in all directions 3-hr Precip: 0.00 ins. BHO SA 1455 250 SCT 40 223/70/47/2313G20/019/ DSNT HZ ALQDS/  8/005 58004 1 P.M. Weather: Broken cirrus, few cumulus in all directions Temperature: 76F; Dew Point: 49F; Wind: SW at 16G24 kts, Peak Wind: 32 kts (37 mph) at 12:41 P.M. Sea-level pressure: 30.12 ins. Hg, falling, then more rapidly Visibility: 40 miles, distant haze in all directions 6-hr Max temp: 76F 6-hr Min temp: 58F 6-hr precip: 0.00 ins. BHO SA 1755 E250 BKN 40 201/76/49/2316G24/012/ FEW CU ALQDS DSNT  HZ ALQDS PK WND 2332/41/ 8/102 58022 10076 20058 SUMMARY FOR MONDAY, JUNE 11, 2018 TEMPERATURE (DEGREES F) MAX.....68   NORMAL.....74 MIN.....51   NORMAL.....56 MEAN....60   NORMAL.....65 DEPARTURE FROM 30-YEAR NORMAL.........................-5 TOTAL DEPARTURE FOR THE MONTH........................-26 [-2.6 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............5   DEPARTURE...........+2 TOTAL HEATING UNITS FOR THE MONTH.............56   DEPARTURE..........+13 TOTAL HEATING UNITS FOR THE SEASON..........5903   DEPARTURE.........-443 TOTAL HEATING UNITS LAST SEASON TO DATE.....5721   DIFFERENCE........+182 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY...............0   DEPARTURE..........-3 TOTAL COOLING UNITS FOR THE MONTH..............12   DEPARTURE.........-12 TOTAL COOLING UNITS FOR THE SEASON.............74   DEPARTURE.........+26 TOTAL COOLING UNITS LAST SEASON TO DATE........77   DEPARTURE..........-3 PEAK GUST AND AVERAGE WIND SPEED (MPH)  PEAK WIND GUST FOR YESTERDAY....................21  ENE AT 2:32 P.M.                    AERO.........................20  SSW AT 9:41 P.M.                     ASOS.........................22  NE  AT 2:33 P.M.                    DAVIS........................22  M   AT 9:42 P.M.** RMY N/A FASTEST MILE FOR YESTERDAY......................16  SSW AT 8:44 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................17  SSW AT 9:44 P.M.   MAXIMUM 2-MINUTE DAVIS AVERAGE..................17  M   AT 8:58 P.M.** AVERAGE WIND SPEED AND DIRECTION...............8.6 ESE                    ASOS........................8.4                    DAVIS.......................8.5 ** Davis direction malfunctioning  PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.16                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........1.01  DEPARTURE......-0.80                          ASOS..............1.04   TOTAL PRECIPITATION FOR THE YEAR..........28.33  DEPARTURE......+4.04                          ASOS.............29.91 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/.../..            21 S   AERO 21 S   RMY N/A 6/02 79/54/67/+5/0.00/.../..         26 ENE AERO 25 ENE RMY 27 6/03 59/45/52/-10/0.00/.../..        28 ENE AERO 25 ENE RMY N/A   6/04 52/45/49/-14/.../.../..         29 ENE AERO 26 ENE RMY 29 6/05 64/47/56/-7/..../.../..         24 N   AERO 21 N   RMY 23 TSTM   6/06 66/50/58/-5/0.00/.../..         23 S   AERO 21 S   RMY 22 6/07 69/50/60/-4/0.00/.../..         25 S   AERO 25 S   RMY 27  6/08 79/52/66/+2/0.00/.../..         20 SW  AERO 17 SW  RMY 18 6/09 79/58/69/+5/0.00/.../..         22 W   AERO 21 W   RMY 22 6/10 72/56/64/-1/0.00/.../..         20 S   AERO 18 S   RMY 17 6/11 68/51/60/-5/0.00/.../..         21 ENE AERO 20 SSW RMY N/A 6/12 Low temp since midnight is 49F; normal low is now 56F 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 12 HIGH 94F IN 2017 LOW 40F IN 1906 PRECIP 1.79 INS 1955 PEAK GUST 58 MPH NW IN 1991 RECORDS FOR JUNE 13 HIGH 93F IN 1988 LOW 43F IN 1982 PRECIP 6.07 INS 1998 [Record for month] PEAK GUST 69 MPH N IN 1956 TODAY'S REPORT PREPARED BY: Benjamin Turner