BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, NOVEMBER 22, 2007 THANKSGIVING DAY ALL TIMES ARE IN EASTERN STANDARD TIME Today's observations: 7 A.M. Weather: Obscurement with heavy fog Temperature: 51F, Dew point: 51F, Wind: SSE at 10 kts Sea-level pressure: 29.81 inches Hg, falling Visibility: 1/16 mile 6-hour min temp: 47F 24-hour precip: 0.01 in. 6-hour precip trace BHO SA 1155 W1 X 1/16F 095/51/51/1510/981/ 8//// 58009 MANUAL 70001 ASOS 70002 10051 20047 10 A.M. Weather: Obscurement with heavy fog Temperature: 53F, Dew point: 53F, Wind: S at 13 kts Sea-level pressure: 29.76 inches Hg, falling Visibility: 1/16 mile 3-hour precip: trace BHO SA 1455 W2 X 1/16F 079/53/53/1813/976/ 8//// 58016 MANUAL 6000/ WEATHER SUMMARY FOR WEDNESDAY, NOVEMBER 21 TEMPERATURE (DEGREES F) MAX.....48 NORMAL.....47 MIN.....32 NORMAL.....33 MEAN....40 NORMAL.....40 DEPARTURE FROM 30-YEAR NORMAL............0 TOTAL DEPARTURE FOR THE MONTH..........-50 [-2.2 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............25 DEPARTURE........0 TOTAL HEATING UNITS FOR THE MONTH...........505 DEPARTURE......+49 TOTAL HEATING UNITS FOR THE SEASON..........851 DEPARTURE.....-196 TOTAL HEATING UNITS LAST SEASON TO DATE.....881 DIFFERENCE.....-30 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............21 N AT 4:44 A.M. AEROVANE.............Unknown ASOS.................18 S AT 11:18 P.M. DAVIS................20 SE AT 10:28 P.M. FASTEST MILE FOR YESTERDAY..............15 SE AT 11:17 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...........15 SSE AT 11:19 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..........17 ESE AT 7:57 P.M. AVERAGE WIND SPEED AND DIRECTION...... 7.3 SE ASOS............... 6.6 DAVIS.............. 7.4 SE [139 deg] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.01 DEPARTURE....-0.15 ASOS..............0.02 TOTAL PRECIPITATION FOR THE MONTH..........3.02 DEPARTURE....-0.26 ASOS..............3.02 TOTAL PRECIPITATION FOR THE YEAR..........38.56 DEPARTURE....-6.74 ASOS.............37.85 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.....-0.9 TOTAL SNOWFALL FOR THE SEASON...............0.8 DEPARTURE.....-1.1 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/.../.. 37 W 11/18 41/29/35/-6/0/.../.. 25 ENE 11/19 36/30/33/-8/0.01/0.1/000/00 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 morning low temp. 47F; normal low is now 32F 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 22 HIGH 70 IN 1931 LOW 12 IN 1987 PRECIP 1.78 INS IN 2005 SNOWFALL 9.0 INS IN 1971 PEAK GUST 70e SE IN 1945 RECORDS FOR NOVEMBER 23 HIGH 73 IN 1931 LOW 09 IN 1888 PRECIP 2.33 INS IN 2006 SNOWFALL 5.5 INS IN 1989 PEAK GUST 64e S IN 1953 TODAY'S REPORT PREPARED By: Stephanie Radner