BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, JUNE 12, 2015 ALL TIMES ARE IN EASTERN STANDARD TIME HOT, HUMID CONDITIONS CONTINUE AS HAZE EASES Yesterday's warmer than normal maximum of 85F and high dew points in the mid 60s have returned today, with slightly drier air in place today. Haze, which limited visibility to less than 10 miles yesterday has been reduced today, along with a slowly rising barometer. By this morning's 10:00 AM EST observation, temperatures were climbing steadily through the 70s with mostly cloudy conditions. Cirrocumulus and cirrus were in place with occasionally calm winds. Today's Observations: 7 A.M. Weather: Broken altocumulus, broken cirrostratus Temperature: 68F; Dew Point: 55F; Wind: NNW at 7 kts Sea-level pressure: 30.01 ins. Hg, rising, then more slowly Visibility: 50 miles, hazy 6-hr Max temp: 69F 6-hr Min temp: 65F 24-hr precip: 0.00 BHO SA 1155 E160 BKN 250 BKN 50 162/68/55/3407/001/ HAZY/ 8/058 51010 10069 20065 10 A.M. Weather: Thin broken cirrus/cirrostratus, few cirrocumulus in all directions Temperature: 77F; Dew Point: 56F; Wind: estimated S at 3 kts, Wind Speed: Light Sea-level pressure: 30.01 ins. Hg, rising slightly Visibility: 40 miles, hazy BHO SA 1455 E250 -BKN 40 164/77/56/E1803/001/ FEW CC ALQDS HAZY WND LGT/ 8/008 50002 SUMMARY FOR THURSDAY, JUNE 11, 2015 TEMPERATURE (DEGREES F) MAX.....85 NORMAL.....74 MIN.....61 NORMAL.....56 MEAN....73 NORMAL.....65 DEPARTURE FROM 30-YEAR NORMAL........................+8 TOTAL DEPARTURE FOR THE MONTH.......................-48 [-4.6 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............0 DEPARTURE...........-3 TOTAL HEATING UNITS FOR THE MONTH..............78 DEPARTURE..........+35 TOTAL HEATING UNITS FOR THE SEASON...........6482 DEPARTURE.........+136 TOTAL HEATING UNITS LAST SEASON TO DATE......6417 DIFFERENCE.........+65 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY..............8 DEPARTURE..........+5 TOTAL COOLING UNITS FOR THE MONTH.............17 DEPARTURE..........-7 TOTAL COOLING UNITS FOR THE SEASON............66 DEPARTURE.........+18 TOTAL COOLING UNITS LAST SEASON TO DATE.......39 DIFFERENCE........+27 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY..................29 SSW AT 2:14 A.M. * ASOS.......................32 W AT 2:02 P.M. DAVIS......................31 SW AT 2:37 A.M. RMY 32 FASTEST MILE FOR YESTERDAY....................23 SSW AT 2:07 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE.................24 SSW AT 2:15 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE................23 SSW AT 2:15 A.M. AVERAGE WIND SPEED AND DIRECTION..............14.8 SSW ASOS.......................14.4 DAVIS......................13.3 SW [233 deg.] * Last of several occurrences... 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...........1.58 DEPARTURE....-0.23 ASOS...............1.60 TOTAL PRECIPITATION FOR THE YEAR.......... 20.95 DEPARTURE....-3.39 ASOS...............N/A *** *** ASOS annual totals not available due to erroneous readings PRELIMINARY CLIMATE SUMMARY FOR JUNE CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP//SUN(MIN.)/SUN(%)/ PEAK GUST/RMY 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 6/1 48/46/47/-15/0.69/000/00 32 NE RMY 34 6/2 47/44/46/-16/..../000/00 28 NNE RMY 28 6/3 59/44/52/-10/0.00/.../.. 16 ESE RMY 16 6/4 63/46/55/-8/0.00/.../.. 17 E RMY 16 6/5 70/49/60/-3/T/.../.. 17 NNE RMY 17 6/6 65/52/59/-4/0.06/.../.. 26 ENE RMY 27 6/7 73/49/61/-3/0.00/.../.. 28 S RMY 29 6/8 73/50/62/-2/T/.../.. 41 SSW RMY 48 6/9 76/61/69/+4/0.03/.../.. 29 SSW RMY 32 6/10 82/57/70/+5/0.00/.../.. 24 WSW RMY N/A 6/11 85/61/73/+8/0.00/.../.. 29 SSW RMY 32 6/12 low since midnight is 65F; normal low is now 56F DAILY RECORDS FOR JUNE 2015 6/1- NEW RECORD LOW MAXIMUM TEMPERATURE OF 48F surpasses previous record of 51F in 2004 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JUNE 12 HIGH 92F IN 1973 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: Brian Fitzgerald