BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA   DAILY DISCUSSION AND CLIMATE SUMMARY TUESDAY, SEPTEMBER 8, 2009 ALL TIMES ARE IN EASTERN STANDARD TIME   VERY SUNNY, DRY AND COOL FIRST WEEK OF SEPTEMBER INCLUDES 91% OF POSSIBLE BRIGHT SUNSHINE AND NOT A DROP OF RAIN   Some dense cirrus clouds shut out the bright sunshine for a portion of this morning, but the cloudiness has thinned out allowing bright sunshine early this afternoon.  The first week of September has been extremely sunny with 91% of the possible bright sunshine. One day had 100% and four other days have had over 90%.  The very dry weather pattern con- tinues with not a drop of rain so far this month.  This comes after 1.80 inches fell on August 28-29.    Today's observations:   7 A.M.   Weather: High dense cirrostratus/cirrus overcast with breaks in overcast distant NW-N and distant SE, few thin spots overhead-NW, sun dimly visible Temperature: 59F, Dew point: 57F, Wind: NW at 6 kts Sea-level pressure: 30.15 inches Hg, rising Visibility: 15 miles, 25 miles WNW, thin fog with temperature inversion present 6-hour minimum temp: 56F BHO SA 1155 200 SCT E220 OVC 15 210/59/57/3106/015/ DENS CS BINOVC DSNT NW-N AND DSNT SE FEW THN SPTS IOVC OVHD-NW SUN DMLY VSB THN FG ALQDS VSBY WNW 20 ABV INVSN/ 8/007 53007 10059 20056   10 A.M. Weather: Overcast cirrus, few altocumulus WNW-N, breaks in overcast Temperature: 67F, Dew point: 58F, Wind: Calm Sea-level pressure: 30.14 inches Hg, falling Visibility: 15 miles BHO SA 1455 E220 BKN 250 OVC 15 208/67/58/0000/014/ LONE CU FRMG OVR CTY N FEW AC WNW-N BINOVC/ CLR SKY BND DSNT NW-N OVC PTLY THN OVHD-W-N/ 8/107 58002     1 P.M. Weather: Scattered dense cirrus, thin overcast cirrus, few cumulus except overhead thru northeast and few cumulus congestus NW-N  Temperature: 74F, Dew point: 56F, Wind: NNE at 6 kts, Wind: light and variable  Sea-level pressure: 30.10 inches Hg, falling Visibility: 30 miles, NE-SE 20 miles, WNW 40 miles, hazy  6-hour max. temp: 74F BHO SA 1755 220 SCT 250 –OVC 30 194/74/56/0206/010/ CU XCPT OVHD-NE FEW MDT CU NW-N PTCHS DENS CI HAZY VSBY NE-SE 20 WNW 40 WND L/V/ 8/202 58012 10074 20059    WEATHER SUMMARY FOR MONDAY, SEPTEMBER 7, LABOR DAY   TEMPERATURE (DEGREES F) MAX.....70    NORMAL.....74 MIN.....52    NORMAL.....56 MEAN....61    NORMAL.....65   DEPARTURE FROM 30-YEAR AVERAGE...........-4 TOTAL DEPARTURE FOR THE MONTH............-8 [-1.3 DEGREES/DAY]   PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.............20 WSW AT 11:57 P.M.                     AEROVANE..............17 WSW AT 11:57 P.M. *                     ASOS..................16 WSW AT 11:59 P.M.                     DAVIS................ 18 WSW AT 11:57 P.M.  FASTEST MILE FOR YESTERDAY...............13 WSW AT 11:53 P.M.  MAXIMUM 2-MINUTE ASOS AVERAGE............14 WSW AT 11:57 P.M.  MAXIMUM 2-MINUTE DAVIS AVERAGE...........13 WSW AT 11:57 P.M.  AVERAGE WIND SPEED AND DIRECTION....... 5.3 S                    ASOS.................5.2                     DAVIS................4.8 SSE [150 DEG] * last of several occurrences.....   PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00   DEPARTURE....-0.13                          ASOS..............0.00 TOTAL PRECIPITATION FOR MONTH..............0.00   DEPARTURE....-0.91                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE YEAR..........34.77   DEPARTURE....+0.39                          ASOS.............35.92   PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER 2009 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane wind recording system gust when significant TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized   9/1  71/51/61/-6/0/773/98     17 NW 9/2  76/54/65/-1/0/786/100    22 S 9/3  77/56/67/+1/0/587/75     19 SW 9/4  77/60/69/+3/0/764/98     18 NE 9/5  81/59/70/+5/0/591/76     25 NNW 9/6  64/53/59/-6/0/743/96     31 NNE 9/7  70/52/61/-4/0/709/92     20 WSW   9/8  our morning low temp: 56F; the normal low is now 56F   NEW DAILY RECORDS FOR SEPTEMBER 2009 TO DATE... None.   DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):   RECORDS FOR SEPTEMBER 8 HIGH 93F IN 2007 LOW 42F IN 1978 PRECIP 0.74 INCHES IN 1888 PEAK GUST 40e MPH NW IN 1941, WSW IN 1944   RECORDS FOR SEPTEMBER 9 HIGH 91F IN 2002 LOW 41F IN 1938 PRECIP 1.97 INCHES IN 1969 PEAK GUST 52 MPH WNW IN 1969, NW IN 1978   TODAY'S REPORT PREPARED BY: Robert Skilling