BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA   DAILY DISCUSSION AND CLIMATE SUMMARY TUESDAY, MARCH 13, 2007  ALL TIMES ARE IN EASTERN STANDARD TIME   A SECOND VERY MILD DAY TODAY WITH TEMPERATURES WELL INTO THE 50'S POSSIBLY REACHING 60 DEGREES THIS AFTERNOON   Cloudiness began to break up to scattered early this afternoon and our temperature was headed into the upper 50's or possibly to 60 degrees.  The day will average more than 10 degrees warmer than normal with the morning low of 36 degrees at 9 degrees above the average.   Today's observations:   7 A.M.   Weather: Broken altocumulus clouds   Temperature: 37F, Dew point: 27F, Wind: SSW at 10 kts Sea-level pressure: 30.17 inches Hg, rising Visibility: 30 miles, light haze 6-hour min. temp. 36 deg. BHO SA 1155 E100 BKN 120 BKN 220 BKN 30 217/37/27/2010/017/ AC CHAOTIC FEW ACC/VIRGA DSNT W-NW ACSL ALQDS DENSE CI LYR DSNT SW-NW THN K LYR ALG HRZNS/ 8/092 51003 10040 20036     10 A.M.   Weather: Broken altocumulus clouds Temperature: 48F, Dew point: 29F, Wind: SSW at 08 kts Sea-level pressure: 30.17 inches Hg, steady Visibility: 25 miles, hazy  BHO SA 1455 80 SCT E95 BKN 250 BKN 25 218/48/29/1908/017/ ACC ALQDS FEW ACSL VIRGA HIER CLD VSB HAZY/ 8/081 51001   1 P.M.   Weather: Scattered high clouds  Temperature: 58F, Dew point: 28F, Wind: S at 16G25 kts Peak wind: SSW @ 27 kts at 42 past the hour Wind: variability SE to SSW Sea-level pressure: 30.11 inches Hg, falling Visibility: 35 miles, NE 25, WNW 45 light haze    BHO SA 1755 220 SCT 250 –SCT 35 196/58/28/1716G25/011/ AC/FEW ACC/ACSL ALQDS PTCHS DENSE LWR CI VSBY LGT HZ VSBY NE 25 WNW 45 WND 14V20/  8/082 58022 10058 20037   WEATHER SUMMARY FOR MONDAY, MARCH 12   TEMPERATURE (DEGREES F) MAX.....55    NORMAL.....43 MIN.....31    NORMAL.....26 MEAN....43    NORMAL.....35                        DEPARTURE FROM 30-YEAR NORMAL.........+ 8 TOTAL DEPARTURE FOR THE MONTH.........-46 (-4.0 DEGREES/DAY)   HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY..........22   DEPARTURE.......- 8 TOTAL HEATING UNITS FOR THE MONTH.........426   DEPARTURE.......+44 TOTAL HEATING UNITS FOR THE SEASON.......4517   DEPARTURE......-435 TOTAL HEATING UNITS LAST SEASON TO DATE..4461   DIFFERENCE......+56   PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............24 SSW AT  4:25 P.M. *                          AEROVANE.............22 SW  AT  2:57 P.M.                          ASOS.................22 SW  AT  2:29 P.M.                          DAVIS................27 SSW AT  2:05 P.M.          FASTEST MILE FOR YESTERDAY..............19 SSW AT  4:25 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...........18 WSW AT  2:29 P.M.    MAXIMUM 2-MINUTE DAVIS AVERAGE..........20 SSW AT  4:47 P.M.    AVERAGE WIND SPEED AND DIRECTION........11.6 W                     ASOS................12.4                         DAVIS.............  12.0 WSW [235 deg]  * last of several occurrences...   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..........2.00  DEPARTURE.....+0.05                           ASOS..............2.01    TOTAL PRECIPITATION FOR THE YEAR...........7.72  DEPARTURE.....-3.07                          ASOS..............7.64     SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE......-0.4 TOTAL SNOWFALL FOR THE MONTH................0.4  DEPARTURE......-5.0  TOTAL SNOWFALL FOR THE SEASON..............14.3  DEPARTURE.....-36.5        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/.../..          24 SSW   3/13 morning low temp. 36 deg; normal now 27 deg.     * 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 13 HIGH 72 IN 1990 LOW -1 IN 1885 PRECIP 2.47 INS. IN 1993 SNOWFALL 10.0 INS. IN 1993 PEAK GUST 76 MPH ENE IN 1993 [THE "STORM OF THE CENTURY"]   RECORDS FOR MARCH 14 HIGH 74 IN 1946 LOW 8 IN 1926 PRECIP 1.72 INS. IN 1984 SNOWFALL 6.7 INS. IN 1958 PEAK GUST 66 MPH WNW IN 1982   TODAY'S REPORT By: Robert Skilling