BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, JUNE 15, 2013 ALL TIMES ARE IN EASTERN STANDARD TIME BEAUTIFUL JUNE DAY The sky has been mostly sunny today with only a few thin high clouds and a few small cumulus by early afternoon. The sunny and dry conditions are a welcome break from the recent rainy weather, though the chance of rain returns tomorrow through Tuesday. With the dew point in the middle 40s and the relative humidity dropping to near 30% this afternoon, the visibility has been excellent today near 75 miles. BHO Wettest Junes, inches (1886-2013) 1) 17.32 in 1998 2) 13.73 in 1982 3) 12.31 in 2006 4) 10.78 in 1922 5) 9.25 in 2013 (through 6/14) 6) 9.03 in 1938 7) 8.77 in 1931 8) 8.64 in 1920 9) 8.02 in 1959 10) 7.45 in 2000 Today's Observations: 7 A.M. Weather: Clear, few altocumulus distant SW-WSW Temperature: 62F; Dew Point: 47F; Wind: NNW at 13 kts Sea-level pressure: 29.90 ins. Hg, rising Visibility: 75 miles 24-hr precip: 0.12 inch 6-hr min. temp: 56F BHO SA 1155 CLR 75 126/62/47/3313/990/ FEW AC DSNT SW-WSW/ 8/030 51020 70012 10062 20056 10 A.M. Weather: Clear, lone cumulus distant W, few thin cirrus distant SSE-SSW Temperature: 70F; Dew Point: 44F; Wind: NNW at 10G18 kts, Sea-level pressure: 29.94 ins. Hg, rising Visibility: 75 miles BHO SA 1455 CLR 75 139/70/44/3310G18/994/ LONE CU DSNT W FEW CI DSNT SSE-SSW/ 8/101 51013 1 P.M. Weather: Thin scattered cirrus, few cumulus/cumulus fractus WSW-NW- overhead, few lower dense cirrus distant WNW Temperature: 74F; Dew Point: 44F; Wind: WNW at 10G18 kts, Wind: Direction variable W-NW Sea-level pressure: 29.92 ins. Hg, falling slightly Visibility: 75 miles 6-hour max. temp: 75F BHO SA 1755 250 –SCT 75 133/74/44/2910G18/992/ FEW CU/CUFRA WSW-NW-OVHD FEW LWR DNS CI DSNT WNW WND 26V32/ 8/101 58006 10075 20062 WEATHER SUMMARY FOR FRIDAY, JUNE 14, 2013 TEMPERATURE (DEGREES F) MAX.....70 NORMAL.....75 MIN.....51 NORMAL.....57 MEAN....61 NORMAL.....66 DEPARTURE FROM 30-YEAR NORMAL....................-5 TOTAL DEPARTURE FOR THE MONTH....................+2 [-0.1 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY..............4 DEPARTURE..........+1 TOTAL HEATING UNITS FOR THE MONTH.............44 DEPARTURE..........-7 TOTAL HEATING UNITS FOR THE SEASON..........5778 DEPARTURE........-576 TOTAL HEATING UNITS LAST SEASON TO DATE.....4958 DIFFERENCE.......+820 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...............32 NE AT 1:08 A.M. AERO....................32 NE AT 1:08 A.M. ASOS....................33 NE AT 2:54 A.M. DAVIS...................31 NE AT N/A RMY 29 FASTEST MILE FOR YESTERDAY.................22 NE AT 12:31 A.M. * MAXIMUM 2-MINUTE ASOS AVERAGE..............22 NE AT 12:31 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.............N/A AVERAGE WIND SPEED AND DIRECTION..........9.5 NE ASOS...................9.4 DAVIS..................8.2 NE [052 deg] * Last of several occurrences PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.12 DEPARTURE............-0.03 ASOS..............0.14 TOTAL PRECIPITATION FOR THE MONTH..........9.25 DEPARTURE............+6.97 ASOS..............9.31 TOTAL PRECIPITATION FOR THE YEAR..........29.34 DEPARTURE............+4.40 ASOS..............N/A* *ASOS malfunctioned during storm on 2/8-9, leading to erroneous totals PRELIMINARY CLIMATE SUMMARY FOR JUNE 2013 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane wind recording system gust RMY: RMY = R.M. Young wind gust recording system added 8/9/2011 TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized 6/1 90/69/80/+18/0.00/905/100 30 SW AERO 32 MPH SW RMY 33 6/2 86/64/75/+13/T/761/84 42 SSW AERO 44 MPH SSW RMY 46 6/3 75/57/66/+4/0.47/154/17 22 WNW AERO 22 MPH SSW RMY 22 6/4 70/48/59/-4/0.00/899/99 25 W AERO 25 MPH W RMY 25 6/5 73/51/62/-1/0.00/727/80 20 SSW AERO 21 MPH S RMY 22 6/6 74/54/64/+1/0.03/455/50 22 SSE AERO 22 MPH S RMY 22 6/7 57/51/54/-10/3.28/000/00 33 NE AERO 32 MPH NE RMY 34 6/8 77/52/65/+1/0.78/356/39 29 W AERO 29 MPH W RMY 29 6/9 78/57/68/+4/0.00/886/97 25 W AERO 23 MPH W RMY 25 6/10 69/55/62/-3/0.76/.../.. 24 E AERO 24 MPH E RMY N/A 6/11 65/53/59/-6/1.61/.../.. 29 E AERO 29 MPH E RMY N/A 6/12 69/54/62/-3/0.01/.../.. 38 NW AERO 41 MPH NW RMY 41 6/13 65/50/58/-7/0.93/.../.. 32 NE AERO 33 MPH NE RMY 34 6/14 70/61/61/-5/1.38/.../.. 32 NE AERO 32 MPH NE RMY 29 6/15 morning low temp: 56F; the normal low is now 57F DAILY RECORDS FOR JUNE 2013 6/1 - TIED DAILY RECORD MAXIMUM TEMPERATURE OF 90F; previous record of 90F set in 1937 6/1 - NEW DAILY RECORD HIGH MINIMUM TEMPERATURE OF 69F; surpasses previous record of 68F set in 1944, 1987 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JUNE 15 HIGH 94F IN 1988 LOW 42F IN 1959, 1978 PRECIP 2.04 INS IN 1903 PEAK GUST 52 MPH SW IN 1972 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 TODAY'S REPORT PREPARED BY: Mike Iacono