BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA MONDAY, JUNE 17, 2013 ALL TIMES ARE IN EASTERN STANDARD TIME WARMER AND INCREASINGLY HUMID WEATHER TODAY BUILDING CUMULUS EARLY THIS AFTERNOON CUMULONIMBUS TOP VISIBLE DISTANT WNW Temperatures rising to mid 80's today after a near normal maximum of 74F yesterday. After the warmest start in two weeks at 61F this morning our high temperature had reached 84F by early afternoon. Dew points had reached the 60's early today but have fallen back slightly to the upper 50's this afternoon. The anvil top of a cumulonimbus cloud over northern Worcester County could be seen at 2 P.M. 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: Thin scattered cirrus Temperature: 68F; Dew Point: 62F; Wind: WSW at 9 kts Sea-level pressure: 29.88 ins. Hg, rising then more slowly Visibility: 30 miles, thin smoke layer along and above the horizon SW-N, hazy 6-hr min. temp: 61F BHO SA 1155 250 –SCT 30 119/68/62/2509/988/ THN K LYR ALG/ABV HRZN SW-N HAZY ALQDS/ 8/001 51011 10068 20061 10 A.M. Weather: Clear, cumulus fractus forming distant all quadrants except overhead-NE-E, few cirrus all quadrants, cirrus layer distant ESE-SSW Temperature: 77F; Dew Point: 60F; Wind: W at 11 kts, Wind: Direction variable WSW-WNW Sea-level pressure: 29.87 ins. Hg, falling then rising slightly Visibility: 45 miles, distant haze BHO SA 1455 CLR 45 115/77/60/2711/987/ CUFRA FRMG DSNT ALQDS XCPT OVHD-NE-E FEW CI XCPT CI LYR ESE-SSW DSNT HZ WND 24V30/ 8/101 55004 1 P.M. Weather: Scattered cumulus, moderate cumulus, cumulonimbus cirrus top distant WNW, cirrus lenticularis NW-NNE Temperature: 83F; Dew Point: 58F; Wind: SW at 13G18 kts, Sea-level pressure: 29.84 ins. Hg, falling then more slowly Visibility: 45 miles, distant haze 6-hr max. temp: 84F BHO SA 1755 50 SCT 250 SCT 45 106/83/58/2213G18/984/ MDT CU ALQDS CB CI TOP DSNT WNW FEW CI ACSL NW-NNE/ 8/209 56009 10084 20068 WEATHER SUMMARY FOR SUNDAY, JUNE 16, 2013 TEMPERATURE (DEGREES F) MAX.....74 NORMAL.....75 MIN.....57 NORMAL.....57 MEAN....66 NORMAL.....66 DEPARTURE FROM 30-YEAR NORMAL.....................0 TOTAL DEPARTURE FOR THE MONTH....................+3 [0.0 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY..............0 DEPARTURE..........-2 TOTAL HEATING UNITS FOR THE MONTH.............44 DEPARTURE.........-12* TOTAL HEATING UNITS FOR THE SEASON..........5778 DEPARTURE........-581* TOTAL HEATING UNITS LAST SEASON TO DATE.....4969 DIFFERENCE.......+809 * corrected from errors on yesterday's, discussion 6/16 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...............25 SW AT 4:28 P.M. * AERO....................24 S AT 4:43 P.M. ASOS....................26 SSW AT 5:56 P.M. DAVIS...................26 S AT 4:12 P.M. RMY 27 FASTEST MILE FOR YESTERDAY.................21 S AT 4:08 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE..............21 SSW AT 5:57 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.............20 SSW AT 5:57 P.M. AVERAGE WIND SPEED AND DIRECTION.........13.4 WSW ASOS..................12.6 DAVIS.................12.3 SW [230 deg] * Last of several occurrences 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..........9.25 DEPARTURE............+6.67 ASOS..............9.31 TOTAL PRECIPITATION FOR THE YEAR..........29.34 DEPARTURE............+4.10 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 77/56/67/+1/0.00/.../.. 23 NW AERO 24 MPH NW RMY 26 6/16 74/57/66/0/0.00/.../.. 25 S AERO 24 MPH S RMY 27 6/17 morning low temp: 61F; the normal low is now 58F 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 17 HIGH 93F IN 1894 LOW 44F IN 1920 PRECIP 2.79 INS 2001 (Sub-Tropical storm ALLISON) PEAK GUST 55e MPH S IN 1977 RECORDS FOR JUNE 18 HIGH 93F IN 1929,1994 LOW 39F IN 1920 PRECIP 3.36 INS 1998 PEAK GUST 48e MPH W IN 1943 TODAY'S REPORT PREPARED BY: Robert Skilling/Marc Douglas/Mark Medlinskas