BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA   DAILY DISCUSSION AND CLIMATE SUMMARY WEDNESDAY, NOVEMBER 28, 2007 ALL TIMES ARE IN EASTERN STANDARD TIME   AFTER AN EARLY MORNING HIGH TEMPERATURE OF 61 DEGREES EARLY TUESDAY A LOW READING OF 30 DEGREES THIS MORNING WAS RIGHT ON THE NORMAL SPRINKLE OF RAIN ACCOMPANIED SECONDARY FRONTAL PASSAGE OVERNIGHT   A weak secondary cold front passed by just after midnight last night and the airmass became drier with dew points dropping from the upper to the lower 20's. Winds veered from SW to W and WNW, and a very light rain shower was recorded around 12:45 a.m. Today's high temperatures have reached the lower 40's by early afternoon. This was up from the morning low of 30 degrees which is exactly normal for the date.    Today's observations:   7 A.M.   Weather: Scattered cirrus, few stratocumulus distant NE-ESE and WNW-N  Temperature: 30F, Dew point: 21F, Wind: W at 11 kts Wind: variability WSW-NW, gust to 22 kts past hour Sea-level pressure: 30.28 inches Hg, rising Visibility: 60 miles 6-hour min temp: 30F 6-hour rainfall 0.00 in. 24-hour rainfall: trace BHO SA 1155 250 SCT 60 253/30/21/2811/028/ FEW SC DSNT NE-ESE AND DSNT WNW-N WND 26V31 GST TO 22 KTS PST HR/ 8/501 51033 10039 20030   10 A.M.   Weather: Clear, few cumulus distant SE and stratocumulus distant WSW-NNW    Few cirrus Temperature: 37F, Dew point: 22F, Wind: WNW at 14G22 kts Wind: variability W-NW  Sea-level pressure: 30.38 inches Hg, rising Visibility: 60 miles BHO SA 1455 CLR 60 287/37/22/2914G22/038/ FEW CU DSNT SE SC DSNT WSW-NNW FEW CI WND 26V32/ 8/501 51034    1 P.M.   Weather: Scattered dense cirrus, thin broken cirrus Temperature: 42F, Dew point: 23F, Wind: W at 09 kts Sea-level pressure: 30.38 inches Hg, steady Visibility: 60 miles 6-hourly max. temp: 43F  BHO SA 1755 220 SCT 250 –BKN 300 –BKN 60 289/42/23/2809/038/ LWR DENS CI SW-N CLR SKY NE-SE/ 8/002 51002 10043 20030     WEATHER SUMMARY FOR TUESDAY, NOVEMBER 27   TEMPERATURE (DEGREES F) MAX.....61    NORMAL.....45 MIN.....38    NORMAL.....30 MEAN....50    NORMAL.....38 DEPARTURE FROM 30-YEAR NORMAL..........+12 TOTAL DEPARTURE FOR THE MONTH..........-40 [-1.7 DEGREES/DAY]   HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............15  DEPARTURE......-12 TOTAL HEATING UNITS FOR THE MONTH...........652  DEPARTURE......+38 TOTAL HEATING UNITS FOR THE SEASON..........998  DEPARTURE.....-207 TOTAL HEATING UNITS LAST SEASON TO DATE....1005  DIFFERENCE......-7   PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............45 S   AT 12:27 A.M. *                          AEROVANE.............49 S   AT 12:10 A.M.                      ASOS.................46 S   AT  2:44 A.M.                            DAVIS................49 S   AT  2:43 A.M.           FASTEST MILE FOR YESTERDAY............. 34 S   AT  3:01 A.M.          MAXIMUM 2-MINUTE ASOS AVERAGE...........35 SSW AT  3:02 A.M.        MAXIMUM 2-MINUTE DAVIS AVERAGE..........39 S   AT  3:02 A.M.        AVERAGE WIND SPEED AND DIRECTION......21.1 W                     ASOS...............20.9                        DAVIS..............21.3 WSW [240 deg]    * last of several occurrences...   PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....trace DEPARTURE....-0.15                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........3.30  DEPARTURE....-0.89                          ASOS..............3.39  TOTAL PRECIPITATION FOR THE YEAR..........38.84  DEPARTURE....-7.37                          ASOS.............38.22     SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.....-0.1 TOTAL SNOWFALL FOR THE MONTH................0.8  DEPARTURE.....-1.6 TOTAL SNOWFALL FOR THE SEASON...............0.8  DEPARTURE.....-1.8   PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 2007...CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW*/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST   AERO: Aerovane recording wind system when significant TSTM: Thunderstorm day ....: Data not yet available   * entries for daily snowfall beginning 19th   11/1  66/42/54/+7/0/050/08         37 S 11/2  50/37/44/-2/0/446/73         29 NE 11/3  46/40/43/-3/0.95/000/00      51 N   Aero 50 MPH NNW  11/4  54/37/46/0/0/503/82          33 W   Aero 33 MPH W    11/5  56/40/48/+3/0/483/79         29 SE 11/6  53/37/45/0/0.75/000/00       35 SSE Aero 35 MPH SSE  11/7  50/32/41/-4/0/551/91         30 W 11/8  43/28/36/-8/0/494/82         22 W 11/9  44/32/38/-6/0.09/331/55      21 NNE 11/10 39/28/34/-10/0.05/383/64     32 N 11/11 42/24/33/-10/0/590/99        23 WNW 11/12 42/27/35/-8/0.02/024/04      25 SSE 11/13 55/42/49/+6/0.33/308/52      28 S 11/14 58/41/50/+8/0/507/86         37 S 11/15 64/40/52/+10/0.41/035/06     44 SSE Aero 46 MPH SSE 11/16 44/30/37/-5/0.31/158/27      51 W   Aero 54 MPH W 11/17 40/28/34/-7/0/350/60         37 W 11/18 41/29/35/-6/0/495/85         25 ENE 11/19 36/30/33/-8/0.01/0.1/030/05  29 N    11/20 37/29/33/-7/0.09/0.7/000/00  22 SE 11/21 48/32/40/0/0.01/0/000/00     21 N 11/22 64/40/52/+12/0.01/0/212/37   36 W 11/23 40/23/32/-7/0/0/503/88       36 W 11/24 32/16/24/-15/0/0/468/82      26 WNW 11/25 48/28/38/-1/0/0/0/557/98     28 S   11/26 58/35/47/+9/0.23/0/000/00    44 S    Aero 46 MPH S 11/27 61/38/50/+12/0.04/0/328/58   45 S    Aero 49 MPH S   11/28 morning low temp. 30F; normal low temp. is now 30F       morning rainfall: trace (very light shower, 12:45 a.m. )         NEW DAILY RECORDS FOR NOVEMBER 2007: NONE   DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):   RECORDS FOR NOVEMBER 28 HIGH 70 IN 1990 LOW 10 IN 1901,1930,1936 PRECIP 1.84 INCHES IN 1889 SNOWFALL 3.0 INS IN 1917 PEAK GUST 90 SSW IN 1958   RECORDS FOR NOVEMBER 29 HIGH 64 IN 1963, 1990 LOW 6 IN 1901 PRECIP 2.69 INCHES IN 1963 SNOWFALL 5.0 INS IN 1995 PEAK GUST 86 SSE IN 1963   TODAY'S REPORT PREPARED By: Robert Skilling