BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, DECEMBER 2, 2007 ALL TIMES ARE IN EASTERN STANDARD TIME November 2007 Summary Temp Max: 48.1 deg F [-1.2] Temp Min: 32.6 deg F [-1.6] Temp Mean: 40.4 deg F [-1.4] Temp Mean (corrected): 39.9 deg F Heating Degree Days: 734 [+36] Precipitation: 3.30 inches [-1.34] Snowfall: 0.8 inches [-1.9] Wind Speed (corrected): 13.6 mph, W Peak Gust: 51 mph N [3rd] and W [16th] Mean Station Pressure: 993.0 mb (29.32 inches) Mean Vapor Pressure: 6.1 mb Fall 2007 (Sep-Nov) Summary Temp Max: 63.3 deg F [+3.1] Temp Min: 45.9 deg F [+2.5] Temp Mean: 54.6 deg F [+2.8] Precipitation: 7.85 inches [-5.34] Today's observations: 7 A.M. Weather: Overcast with a few breaks Temperature: 16F, Dew point: -4F, Wind: WNW at 12G16 kt Sea-level pressure: 30.47 inches Hg, falling Visibility: 25 miles 6-hour min temp: 15F BHO SA 1155 100 OVC 25 320/16/-4/3012G16/047/ VIRGA ALQDS FEW BINOVC DSNT E/ 8/04/ 55005 10016 20015 10 A.M. Weather: Overcast with breaks Temperature: 20F, Dew point: -1F, Wind: W at 8 kt Sea-level pressure: 30.43 inches Hg, falling Visibility: 25 miles BHO SA 1455 100 OVC 25 304/20/-1/2608/043/ FEW BINVOC N VIRGA SW-NW WND 24V34/ 8/04/ 58016 WEATHER SUMMARY FOR SATURDAY, DECEMBER 1 TEMPERATURE (DEGREES F) MAX.....33 NORMAL.....43 MIN.....15 NORMAL.....29 MEAN....24 NORMAL.....36 DEPARTURE FROM 30-YEAR NORMAL..........-12 TOTAL DEPARTURE FOR THE MONTH..........-12 [-12 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............41 DEPARTURE......+12 TOTAL HEATING UNITS FOR THE MONTH............41 DEPARTURE......+12 TOTAL HEATING UNITS FOR THE SEASON.........1121 DEPARTURE.....-197 TOTAL HEATING UNITS LAST SEASON TO DATE....1056 DIFFERENCE.....+65 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............54 WNW AT 9:40 A.M. AEROVANE.............57 WNW AT 9:34 A.M. ASOS.................55 NW AT 9:41 A.M. DAVIS................51 WNW AT 9:21 A.M. FASTEST MILE FOR YESTERDAY..............43 WNW AT 9:43 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...........39 NW AT 9:41 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..........43 WNW AT 9:34 A.M. AVERAGE WIND SPEED AND DIRECTION......20.5 NW ASOS...............18.6 DAVIS..............20.4 W [285 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..........0.00 DEPARTURE....-0.15 ASOS..............0.00 TOTAL PRECIPITATION FOR THE YEAR..........38.84 DEPARTURE....-7.97 ASOS.............38.22 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE.....-0.2 TOTAL SNOWFALL FOR THE MONTH................0.0 DEPARTURE.....-0.2 TOTAL SNOWFALL FOR THE SEASON...............0.8 DEPARTURE.....-2.3 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 19 NOV 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 43/30/37/0/T/0/502/89 37 W 11/29 48/34/41/+4/T/0/022/04 38 S 11/30 40/30/35/-2/0/0/.../.. 38 W NEW DAILY RECORDS FOR NOVEMBER 2007: NONE PRELIMINARY CLIMATE SUMMARY FOR DECEMBER 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 12/1 33/15/24/-12/0/0/.../.. 54 WNW NEW DAILY RECORDS FOR DECEMBER 2007: NONE DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR DECEMBER 2 HIGH 61 IN 1998 LOW 3 IN 1890 PRECIP 2.09 INCHES IN 1974 SNOWFALL 5.0 INCHES IN 1894,1929 PEAK GUST 89e MPH SSE IN 1942 RECORDS FOR DECEMBER 3 HIGH 61 IN 1932,1950 LOW -1 IN 1890 PRECIP 2.10 INCHES IN 1986 SNOWFALL 6.0 INCHES IN 1963 PEAK GUST 73e MPH W IN 1942 TODAY'S REPORT PREPARED By: Andrew Hoell