BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA THURSDAY, JUNE 20, 2013 ALL TIMES ARE IN EASTERN STANDARD TIME SUNNY AND MUCH WARMER BUT STILL WITH LOW HUMIDITY Under a sunny sky and the wind turning to the southwest temperatures have risen from 53F which was 6 degrees cooler than normal this morning to the upper 70's by early this afternoon. The air mass continues dry with dew points in the upper 40's. BHO Wettest Junes, inches (1886-2013) 1) 17.32 in 1998 2) 13.73 in 1982 3) 12.31 in 2006 4) 11.13 in 2013 (through 6/19) 5) 10.78 in 1922 6) 10.55 in 2013 7) 9.03 in 1938 8) 8.77 in 1931 9) 8.64 in 1920 10) 8.02 in 1959 Today's Observations: 7 A.M. Weather: Clear, few cirrus E-S Temperature: 62F; Dew Point: 51F; Wind: NNE at 4 kts. Sea-level pressure: 30.26 ins. Hg, rising then more slowly Visibility: 35 miles, except 50 miles WNW, thin smoke layer along horizons except NE-SE, distant haze 6-hour min. temp: 53F BHO SA 1155 CLR 35 247/62/51/0204/026/ FEW CI E-S THN K LYR ALG HRZNS XCPT NE-SE VSBY WNW 50 DSNT HZ/ 8/001 51019 10062 20053 10 A.M. Weather: Clear, cumulus fractus and cumulus forming except overhead thru N-E, few moderate cumulus forming distant SE-S, dense cirrus distant WNW-NNW Temperature: 71F; Dew Point: 48F; Wind: SE at 2 kts (estimated) Wind: Light Sea-level pressure: 30.26 ins. Hg, rising then falling slightly Visibility: 50 miles, dark smoke layer aloft NNW and dark smoke layer along/above horizon N-ENE, distant haze BHO SA 1455 CLR 50 248/71/48/E1302/026/ CUFRA/CU FRMG XCPT OVHD-N-NE FEW MDT CU FRMG DSNT SE-S DNS CI DSNT WNW-NNW DRK K LYR ALF NNW AND ALG/ABV HRZN N-ENE DSNT HZ WND LGT/ 8/202 50001 1 P.M. Weather: Scattered cumulus fractus, cumulus, few moderate cumulus distant SE-SSE, few altocumulus cumulogenitus, cirrus and dense cirrus N-E Temperature: 75F; Dew Point: 48F; Wind: SSW at 5 kts, Wind: Light Sea-level pressure: 30.25, Hg, falling slightly Visibility: 50 miles, thin smoke layer aloft NE, visibility NE 35 miles, W-NW, 55 miles, light distant haze 6-hr max. temp: 77F BHO SA 1755 50 SCT 70 SCT 220 SCT 50 244/75/48/2005/025/ SML CUFRA AND CU FEW MDT CU DSNT SE-SSE CI/DNS CI DSNT N-E THN K LYR ALF NE-ENE VSBY NE 35 W-NW 55 LGT DSNT HZ WND LGT/ 8/102 58004 10077 20062 WEATHER SUMMARY FOR WEDNESDAY, JUNE 19, 2013 TEMPERATURE (DEGREES F) MAX.....71 NORMAL.....76 MIN.....53 NORMAL.....58 MEAN....62 NORMAL.....67 DEPARTURE FROM 30-YEAR NORMAL....................-5 TOTAL DEPARTURE FOR THE MONTH....................+1 [-0.1 DEGREE/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY..............0 DEPARTURE..........-2 TOTAL HEATING UNITS FOR THE MONTH.............47 DEPARTURE.........-15 TOTAL HEATING UNITS FOR THE SEASON..........5781 DEPARTURE........-584 TOTAL HEATING UNITS LAST SEASON TO DATE.....4983 DIFFERENCE.......+798 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...............20 NNE AT 2:41 A.M. AERO....................20 NNE AT 2:27 A.M. ASOS....................20 NNE AT 2:41 A.M. DAVIS...................18 N AT 1:45 A.M. RMY N/A FASTEST MILE FOR YESTERDAY.................14 S AT 9:27 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE..............14 S AT 9:29 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.............14 ENE AT 11:21 A.M. AVERAGE WIND SPEED AND DIRECTION..........8.8 N ASOS...................9.0 DAVIS..................7.8 NE [040 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.........11.13 DEPARTURE............+8.12 ASOS.............11.20 TOTAL PRECIPITATION FOR THE YEAR..........31.22 DEPARTURE............+5.55 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 TSTM 6/9 78/57/68/+4/0.00/886/97 25 W AERO 23 MPH W RMY 25 6/10 69/55/62/-3/0.76/119/13 24 E AERO 24 MPH E RMY N/A 6/11 65/53/59/-6/1.61/000/00 29 E AERO 29 MPH E RMY N/A 6/12 69/54/62/-3/0.01/320/35 38 NW AERO 41 MPH NW RMY 41 6/13 65/50/58/-7/0.93/110/12 32 NE AERO 33 MPH NE RMY 34 6/14 70/61/61/-5/1.38/421/46 32 NE AERO 32 MPH NE RMY 29 6/15 77/56/67/+1/0.00/907/99 23 NW AERO 24 MPH NW RMY 26 6/16 74/57/66/0/0.00/266/29 25 S AERO 24 MPH S RMY 27 6/17 84/60/72/+5/1.27/.../.. 45 NW AERO 51 MPH NW RMY 48 TSTM 6/18 74/56/65/-2/0.61/.../.. 32 ENE AERO 32 MPH ENE RMY 33 TSTM 6/19 71/53/62/-5/0.00/.../.. 20 NNE AERO 20 MPH NNE RMY N/A 6/20 morning low temp: 53F; the normal low is now 59F 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 20 HIGH 94F IN 1953 LOW 41F IN 1918 PRECIP 2.62 INS 1945 PEAK GUST 63 MPH NE IN 1967, SSW IN 2010 RECORDS FOR JUNE 21 HIGH 94F IN 2012 LOW 42F IN 1940 PRECIP 1.40 INS 1903 PEAK GUST 51 MPH SSW IN 2000 TODAY'S REPORT PREPARED BY: Robert Skilling/ Mark Medlinskas