BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA   DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, SEPTEMBER 6, 2013 ALL TIMES ARE IN EASTERN STANDARD TIME   COOLEST OF THE SEASON--DOWN TO 46F AT THE SUMMIT TEMPERATURES RISING RAPIDLY INTO THE 60'S THIS MORNING   This morning's low temperature of 46 degrees was 12 degrees below the average for this date of 58 degrees but well short of the record low for the date of 39F way back in the early record in 1888.  All but that one of the record lows for the first 10 days of September are in the 40 to 46 degree range.    Plenty of bright early September sunshine was sending the thermometer up 6 degrees in the hour from 8 to 9 A.M. EDT.   Today's Observations:   7 A.M.   Weather: Clear, few small cumulus distant E-SE, cirrus except overhead through SE  Temperature: 50F; Dew Point: 42F; Wind: N at 8 kts Sea-level pressure: 30.24 ins. Hg, rising, then rising more slowly Visibility: 75 miles, light distant haze    6-hr min. temp: 46F BHO SA 1155 CLR 75 239/50/42/3508/024/ FEW SML CU DSNT E-SE CI XCPT OVHD-SE/ 8/101 51012 MANUAL 70008 ASOS 70007 10050 20046   10 A.M.  Weather: Thin scattered cirrus, thin broken cirrus, small cumulus mostly distant ESE-SSE Temperature: 60F Dew Point: 38F; Wind WSW at 3 kts Sea-level pressure: 30.25 ins. Hg, rising, then falling slightly   Visibility: 75 miles, light distant haze   BHO SA 1455 200 -SCT 250 -BKN 75 243/60/38/2503/025/ FEW SML CU DSNT ESE-SSE LGT DSNT HZ/ 8/101 50004 WEATHER SUMMARY FOR THURSDAY, SEPTEMBER 5, 2013   TEMPERATURE (DEGREES F) MAX.....66     NORMAL.....75 MIN.....51     NORMAL.....58 MEAN....59     NORMAL.....67   DEPARTURE FROM 30-YEAR NORMAL.......................-8 TOTAL DEPARTURE FOR THE MONTH.......................+5 [+0.8 DEGREE/DAY]   COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY..............0   DEPARTURE.........-3 TOTAL COOLING UNITS FOR THE MONTH.............23   DEPARTURE.........+5 TOTAL COOLING UNITS FOR THE SEASON...........663   DEPARTURE.......+108 TOTAL COOLING UNITS LAST SEASON TO DATE......731   DIFFERENCE.......-68   PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY................20 NNE AT 10:56 A.M.                    AERO.....................20 NNE AT 10:56 A.M.                    ASOS.....................21 NNE AT 10:56 A.M.                     DAVIS....................20 NNE AT 10:56 A.M. RMY 21 FASTEST MILE FOR YESTERDAY..................14 NNE AT 10:56 A.M.  MAXIMUM 2-MINUTE ASOS AVERAGE...............14 ENE AT 11:57 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..............14 NNE AT 10:57 A.M. AVERAGE WIND SPEED AND DIRECTION.............8.3 WSW                    ASOS......................8.2                    DAVIS.....................7.3 WNW [290 deg.]   PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.08   DEPARTURE.............-0.04                          ASOS..............0.07 TOTAL PRECIPITATION FOR THE MONTH..........2.83   DEPARTURE.............+2.25                          ASOS..............2.95 TOTAL PRECIPITATION FOR THE YEAR..........40.84   DEPARTURE.............+5.24                          ASOS..............N/A* *ASOS malfunctioned during storm on 2/8-9, leading to erroneous totals        PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER 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   9/1  76/67/72/+4/2.32/.../..         33 S   AERO 39 MPH S   RMY 38   TSTM 9/2  79/67/73/+5/0.43/.../..         30 SSE AERO 33 MPH SSE RMY N/A  TSTM 9/3  79/61/70/+3/0.00/.../..         28 S   AERO 29 MPH S   RMY 30  9/4  78/57/68/+1/0.00/.../..         24 W   AERO 25 MPH W   RMY 25 9/5  66/51/59/-8/0.08/.../..         20 NNE AERO 20 MPH NNE RMY 21   9/6  morning low temp: 46F; the normal low is now 58F   DAILY RECORDS FOR AUGUST 2013 None.   DAILY RECORDS FOR SEPTEMBER 2013 9/1 - NEW DAILY RECORD MAXIMUM PRECIPITATION OF 2.32 INCHES;       surpasses previous record of 1.60 inches set in 1927   DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):   RECORDS FOR SEPTEMBER 6 HIGH 92F IN 1900 LOW 39F IN 1888 PRECIP 3.19 INCHES IN 1890 PEAK GUST 78e MPH SE IN 1979 (TROPICAL STORM DAVID)   RECORDS FOR SEPTEMBER 7 HIGH 92F IN 2007 LOW 40F IN 1888 PRECIP 2.95 INCHES IN 1891 PEAK GUST 58e MPH W IN 1941   TODAY'S REPORT PREPARED BY: ROBERT SKILLING