BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA   DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, SEPTEMBER 14, 2007    ALL TIMES ARE IN EASTERN STANDARD TIME   Today's observations:   7 A.M.   Weather: Clear Temperature: 61F, Dew point: 56F, Wind: S at 8 kts Sea-level pressure: 30.23 inches Hg, steady Visibility: 35 miles    6-hour min temp: 56F 24-hour rainfall: 0.00 in. BHO SA 1155 CLR 35 237/61/56/1708/023/ DRK K LYR SW-NW THN K LYR N-NE/ 50004 10061 20056   10 A.M.   Weather: Scattered cirrus, few cumulus Temperature: 71F, Dew point: 49F, Wind: SSE at 10 kts Wind: Variable direction E-S Sea-level pressure: 30.22 inches Hg, falling Visibility: 45 miles   BHO SA 1455 250 SCT CI 45 232/71/49/1610/022/ FEW CU ALQDS WND 10V19/ 8/101 58005   1 P.M.   Weather: Thin broken cirrus, few stratocumulus N and SE-SW Temperature: 75F, Dew point: 46F, Wind: S at 12G20 kts Sea-level pressure: 30.16 inches Hg, falling Visibility: 55 miles 6-hour max. temp: 76F BHO SA 1755 250 –BKN 55 213/75/46/1712G20/016/ PTCHS DNS CI FEW SC N AND SE-SW/ 8/502 58019 10076 20061   WEATHER SUMMARY FOR THURSDAY, SEPTEMBER 13   TEMPERATURE (DEGREES F) MAX.....73    NORMAL.....72 MIN.....52    NORMAL.....54 MEAN....63    NORMAL.....63 DEPARTURE FROM 30-YEAR NORMAL..........0 TOTAL DEPARTURE FOR THE MONTH........+34  [+2.4 DEGREES/DAY]   PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY..............23 ESE AT 8:48 P.M.                         AEROVANE...............18 ESE AT 8:38 P.M.                        ASOS...................N/A  #                    DAVIS..................20 ESE  FASTEST MILE FOR YESTERDAY................16 ESE AT 8:27 P.M.   MAXIMUM 2-MINUTE ASOS AVERAGE.............N/A  # MAXIMUM 2-MINUTE DAVIS AVERAGE............16 SE  AT 8:58 P.M.   AVERAGE WIND SPEED AND DIRECTION..........8.3 W                     ASOS...................N/A  #                    DAVIS..................8.6 W [272 deg]      # ASOS WINDS SWITCHED OFF BY NWS 6/6, IT IS NOT KNOWN WHEN   THAT DATA WILL RESUME   PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE.....-0.14                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........1.53  DEPARTURE.....-0.22                           ASOS..............1.56    TOTAL PRECIPITATION FOR THE YEAR..........32.52  DEPARTURE.....-2.70                          ASOS.............31.79       PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER 2007...CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST   AERO: Aerovane recording wind system when significant TSTM: Thunderstorm day ....: Data not yet available   9/1  79/57/68/+1/0/790/100    25 WNW   9/2  78/51/65/-1/0/787/100    22 S   9/3  85/57/71/+5/0/760/97     31 SSW AERO 28 MPH SSW 9/4  76/61/69/+3/0/641/82     28 NW  AERO 26 MPH NW 9/5  74/53/64/-1/0/732/94     21 ESE 9/6  76/55/66/+1/0/380/49     31 S 9/7  92/62/77/+12/0/680/88*   30 SSW 9/8  93/67/80/+15/0/686/89    31 S    TSTM 9/9  72/57/65/+1/0.16/000/00  28 NNE  TSTM 9/10 66/57/62/-2/0.03/000/00  18 NNE 9/11 68/58/63/-1/1.34/000/00  30 WNW  9/12 73/55/64/+1/0/752/99     35 W   Aero 33 MPH W 9/13 73/52/63/0/0/741/98      23 ESE Aero 18 MPH ESE   9/14 morning low temp. of 56F; normal low now 54F   * sunshine minutes and % corrected    NEW DAILY RECORDS FOR SEPTEMBER 2007:    9/7 - RECORD HIGH TEMPERATURE 92; PREVIOUS 91 IN 1945. 9/8 - RECORD HIGH TEMPERATURE 93; PREVIOUS 91 IN 1945.   DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):   RECORDS FOR SEPTEMBER 14 HIGH 90F IN 1931 LOW 34F IN 1911 PRECIP 4.38 INCHES IN 1944 (Great Atlantic Hurricane; 3.67 inches associated with hurricane on 14-15th, lowest pressure 28.62 inches early on 15th) PEAK GUST 96e MPH E IN 1944 (Great Atlantic Hurricane; estimated from measured fastest mile of 77 mph)   RECORDS FOR SEPTEMBER 15 HIGH 89F IN 1931 LOW 35F IN 1913 PRECIP 3.93 INCHES IN 1904 (Extra-tropical storm making landfall in New England on 9/15/1904 passing east of BHO and bringing a storm total of 4.11 inches 9/14-15/1904) PEAK GUST 65e MPH NW, WSW IN 1944 (In the wake of Great Atlantic Hurricane)   TODAY'S REPORT PREPARED By: Stephanie Radner