BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA   DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, MARCH 31, 2007  ALL TIMES ARE IN EASTERN STANDARD TIME   Today's observations:   7 A.M.   Weather: Thin overcast cirrus Temperature: 35F, Dew point: 8F, Wind: NNW at 15G20 kt Sea-level pressure: 30.24 inches Hg, rising Visibility: 80 miles 6-hour min. 33F BHO SA 1155 250 –OVC 80 240/35/8/3315G20/024/ 8/001 53022 10040 20033   10 A.M.   Weather: Thin broken cirrus Temperature: 43F, Dew point: 7F, Wind: NE at 9 kt Sea-level pressure: 30.28 inches Hg, rising Visibility: 65 miles BHO SA 1455 250 –BKN 65 254/43/7/0309/028/ WND 30V09/ 8/001 50014   WEATHER SUMMARY FOR FRIDAY, MARCH 30   TEMPERATURE (DEGREES F) MAX.....61    NORMAL.....50 MIN.....32    NORMAL.....32 MEAN....47    NORMAL.....41   DEPARTURE FROM 30-YEAR NORMAL..........+ 6 TOTAL DEPARTURE FOR THE MONTH..........-16 (-0.3 DEGREES/DAY)   HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY..........18   DEPARTURE........- 6 TOTAL HEATING UNITS FOR THE MONTH.........882   DEPARTURE........+12 TOTAL HEATING UNITS FOR THE SEASON.......4973   DEPARTURE.......-473 TOTAL HEATING UNITS LAST SEASON TO DATE..4947   DIFFERENCE.......+26   PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............37 W   AT  3:42 P.M.                            AEROVANE............ 36 W   AT  3:12 P.M.                            ASOS.................33 W   AT  3:42 P.M.                             DAVIS................37 W               FASTEST MILE FOR YESTERDAY..............27 W    AT 3:40 P.M.     MAXIMUM 2-MINUTE ASOS AVERAGE...........25 WNW  AT 4:56 P.M.       MAXIMUM 2-MINUTE DAVIS AVERAGE..........28 W      AVERAGE WIND SPEED AND DIRECTION......14.7 WNW                     ASOS..............14.7                          DAVIS.............15.3 W [287 deg]   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..........6.02  DEPARTURE.....+1.23                           ASOS..............6.01    TOTAL PRECIPITATION FOR THE YEAR..........11.74  DEPARTURE.....-1.89                          ASOS.............11.64     SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE......-0.2 TOTAL SNOWFALL FOR THE MONTH...............13.5  DEPARTURE......+2.4  TOTAL SNOWFALL FOR THE SEASON..............27.4  DEPARTURE.....-29.1        PRELIMINARY CLIMATE SUMMARY FOR MARCH 2007......CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOWFALL/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST   AERO: Aerovane recording wind system when significant TSTM: Thunderstorm day ....: Data not yet available   3/1  40/22/31/-1/0/0/512/76          24 NW   Aero 23 MPH NW 3/2  49/28/39/+7/1.74/0.4/000/00     48 E    Aero 45 MPH E 3/3  58/33/46/+14/0/0/489/72         44 WNW  Aero 43 MPH WNW 3/4  40/26/33/0/0/0/471/69           37 W 3/5  37/19/28/-5/T/T/198/29          58 W    Aero 57 MPH W 3/6  19/3/11/-22/0/0/667/97 *        57 W    Aero 61 MPH W 3/7  22/2/12/-21/0/0/504/73          28 SW    3/8  25/5/15/-19/T/T/471/68          51 WNW  Aero 54 MPH WNW 3/9  34/1/18/-16/0/0/668/96 *        25 S     3/10 49/22/36/+2/0/0/322/46          39 S    Aero 39 MPH S 3/11 51/33/42/+7/0.26/0/513/73       32 W 3/12 55/31/43/+8/0/0/423/60          24 SSW 3/13 60/36/48/+13/0/0/312/44         35 S    Aero 33 MPH S 3/14 66/42/54/+18/0/0/412/57         36 S 3/15 54/35/45/+9/0.07/0/000/00       36 NW 3/16 35/24/30/-6/1.65/8.5/000/00     55 NE   Aero 53 MPH NE 3/17 34/24/29/-6/1.52/T/000/00       51 NNE  Aero 50 MPH NE 3/18 31/20/26/-11/0/0/318/44         43 W    Aero 42 MPH W 3/19 40/22/31/-6/0.18/1.0/435/60     38 S    Aero 37 MPH S 3/20 42/21/32/-6/0/0/677/93          46 WSW  Aero 47 MPH W 3/21 36/16/26/-12/0/0/702/96         33 S 3/22 52/31/42/+4/T/0/132/18          47 S    Aero 50 MPH S 3/23 57/41/49/+11/T/0/258/35         35 W 3/24 50/31/41/+2/0.40/3.5/585/79     28 E    Aero 23 MPH E 3/25 45/32/39/0/0.01/0.1/126/17      16 WSW 3/26 45/34/40/+1/0.17/0/026/03       37 S 3/27 61/41/51/+11/0.02/0/239/32      24 WNW 3/28 54/36/45/+5/0/0/706/94          46 WNW  Aero 48 MPH WNW 3/29 50/28/39/-1/0/0/739/98          46 NW 3/30 61/32/47/+6/0/0/.../..          37 W       * Record low maximum temperature of 19 on the 6th surpasses previous 21 set   in 1916. * Record low minimum temperature of 3 on the 6th ties previous 3 set in 1948. * Record low minimum temperature of 1 on the 9th breaks previous 5 set in   1885, 1943, and 1996.   DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):   RECORDS FOR MARCH 31 HIGH 89 IN 1998  [RECORD HIGH FOR MONTH] LOW 16 IN 1923 PRECIP 2.89 INCHES IN 1987 SNOWFALL 15.0 INCHES IN 1997 PEAK GUST 81 MPH SSE IN 1987   RECORDS FOR APRIL 1 HIGH 74 IN 1967 LOW 6 IN 1923 [RECORD FOR MONTH] PRECIP 3.47 INCHES IN 2004 [RECORD FOR MONTH] SNOWFALL 15.0 INCHES IN 1997 [RECORD FOR MONTH] PEAK GUST 75 MPH SSW IN 1962 TODAY'S REPORT By: Andrew Hoell