BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, JUNE 13, 2013 ALL TIMES ARE IN EASTERN STANDARD TIME SHOWERS WEDNESDAY AFTERNOON LEAVE 0.01 RAINFALL LIGHT RAIN BEGAN THIS MORNING AND CONTINUED Light rain showers yesterday afternoon left only 0.01 inch of rain. Rain which began around 10 A.M. EDT this morning has amounted to 0.08 inch by 2 P.M. EDT. Temperatures continue on the very cool side for June but the month still clings to a slightly warmer than normal departure. 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) 9.03 in 1938 6) 8.77 in 1931 7) 8.64 in 1920 8) 8.02 in 1959 9) 7.45 in 2000 10) 7.41 in 2001 Today's Observations: 7 A.M. Weather: Scattered altocumulus, scattered dense cirrostratus, thin overcast cirrostratus, altocumulus layer south thru northwest advancing Temperature: 63F; Dew Point: 52F; Wind: Estimated N at 1 kt, Wind: Light Sea-level pressure: 29.83 ins. Hg, rising then falling Visibility: 35 miles, except 45 miles WNW, distant haze 24-hr precip: 0.01 inch 6-hr min. temp: 54F BHO SA 1155 100 SCT 220 SCT 300 –OVC 35 100/63/52/E3501/983/ AC LYR S-NW INVDNG LWR CS LYR S-W VSBY WNW 45 DSNT HZ WND LGT/ 8/057 50004 10062 20054 10 A.M. Weather: Overcast nimbostratus, lone cumulus over heat islad over city to the north, light rain occurring, very light Temperature: 63F; Dew Point: 56F; Wind: S at 5 kts, Wind: Light Sea-level pressure: 29.80 ins. Hg, falling slightly Visibility: 25 miles, light rain, hazy BHO SA 1455 E100 OVC 25R- 092/63/56/1805/980/ LONE HEAT I CU OVR CTY N PCPN VRY LGT HAZY ALQDS WND LGT RB05/ 8/02/ 56008 MANUAL 6000/ 1 P.M. Weather: Overcast nimbostratus, few stratus fractus forming over hill east, light rain occurring, thin fog Temperature: 58F; Dew Point: 57F; Wind: SSE at 6 kts, Sea-level pressure: 29.77 ins. Hg, falling then more rapidly Visibility: 10 miles, light rain the thin fog, visibility lowering 6-hour max. temp: 65F 6-hour precip: 0.08 in. BHO SA 1755 E70 OVC 10R- 081/58/57/1606/977/ FEW STFRA FRMG OVR HILLS E VSBY LWRG/ 8/72/ 58011 MANUAL 6008/ ASOS 60008 10065 20058 WEATHER SUMMARY FOR WEDNESDAY, JUNE 12, 2013 TEMPERATURE (DEGREES F) MAX.....69 NORMAL.....74 MIN.....54 NORMAL.....56 MEAN....62 NORMAL.....65 DEPARTURE FROM 30-YEAR NORMAL....................-3 TOTAL DEPARTURE FOR THE MONTH...................+14 [+1.0 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY..............3 DEPARTURE..........+0 TOTAL HEATING UNITS FOR THE MONTH.............33 DEPARTURE.........-13 TOTAL HEATING UNITS FOR THE SEASON..........5767 DEPARTURE........-582 TOTAL HEATING UNITS LAST SEASON TO DATE.....4954 DIFFERENCE.......+813 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...............38 NW AT 12:24 P.M. AERO....................42 NW AT 12:20 P.M. ASOS....................41 NW AT 12:25 P.M. DAVIS...................39 WNW AT 10:44 A.M. RMY 41 FASTEST MILE FOR YESTERDAY.................28 NW AT 10:10 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE..............29 NW AT 10:13 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.............26 NW AT 10:13 A.M. AVERAGE WIND SPEED AND DIRECTION.........13.0 WNW ASOS..................11.8 DAVIS.................13.0 NW [310 deg] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.01 DEPARTURE............-0.15 ASOS..............0.01 TOTAL PRECIPITATION FOR THE MONTH..........6.94 DEPARTURE............+4.97 ASOS..............6.98 TOTAL PRECIPITATION FOR THE YEAR...........27.03 DEPARTURE............+2.40 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 morning low temp: 54F; the normal low is now 56F 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 13 HIGH 93F IN 1988 LOW 43F IN 1982 PRECIP 6.07 INS 1998 [Record for month] PEAK GUST 69 MPH N IN 1956 RECORDS FOR JUNE 14 HIGH 93F IN 1956 LOW 41F IN 1912 PRECIP 1.49 INS 1896 PEAK GUST 55 MPH WNW IN 1958 TODAY'S REPORT PREPARED BY: Robert Skilling/Mark Medlinskas/Marc Douglas