BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, NOVEMBER 29, 2007 ALL TIMES ARE IN EASTERN STANDARD TIME Today's observations: 7 A.M. Weather: Overcast stratocumulus Temperature: 40F, Dew point: 35F, Wind: SSE at 16G22 kts Sea-level pressure: 30.14 inches Hg, falling rapidly Visibility: 20 miles, light haze 6-hour min temp: 34F 24-hour rainfall: 0 in. BHO SA 1155 25 SCT E35 OVC 20 207/40/35/1516G22/014/ LGT HZ PRESFR 8/5// 58039 10040 20034 10 A.M. Weather: Overcast Temperature: 45F, Dew point: 37F, Wind: S at 18G30 kts Peak wind past hour: 31 kts S @ 9:44 A.M. Wind: variability ESE-SSW Sea-level pressure: 30.05 inches Hg, falling Visibility: 25 miles, light haze BHO SA 1455 35 SCT E140 OVC 25 177/45/37/1718G30/005/ LGT HZ PK WND 1731/44 WND12V21/ 8/57/ 58030 1 P.M. Weather: Overcast Temperature: 47F, Dew point: 38F, Wind: S at 22G28 kts Peak wind past hour: 32 kts S @ 12:42 P.M. Sea-level pressure: 29.94 inches Hg, falling Visibility: 35 miles 6-hourly max. temp: 47F BHO SA 1755 E140 OVC 35 140/47/38/1922G28/994/ FEW CU W-NW PK WND 1832/42/ 8/17/ 58037 10047 20040 WEATHER SUMMARY FOR WEDNESDAY, NOVEMBER 28 TEMPERATURE (DEGREES F) MAX.....43 NORMAL.....45 MIN.....30 NORMAL.....30 MEAN....37 NORMAL.....37 DEPARTURE FROM 30-YEAR NORMAL............0 TOTAL DEPARTURE FOR THE MONTH..........-40 [-1.6 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............28 DEPARTURE........0 TOTAL HEATING UNITS FOR THE MONTH...........680 DEPARTURE......+38 TOTAL HEATING UNITS FOR THE SEASON.........1026 DEPARTURE.....-207 TOTAL HEATING UNITS LAST SEASON TO DATE....1026 DIFFERENCE.......0 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............37 W AT 1:58 A.M. AEROVANE.............36 W AT 1:58 A.M. ASOS.................33 WNW AT 2:15 A.M. DAVIS................35 W AT 12:28 A.M. FASTEST MILE FOR YESTERDAY............. 26 W AT 2:01 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...........26 W AT 2:01 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..........29 W AT 2:01 A.M. AVERAGE WIND SPEED AND DIRECTION......11.6 W ASOS...............11.0 DAVIS..............12.0 WNW [285 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..........3.30 DEPARTURE....-1.04 ASOS..............3.39 TOTAL PRECIPITATION FOR THE YEAR..........38.84 DEPARTURE....-7.52 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.....-1.7 TOTAL SNOWFALL FOR THE SEASON...............0.8 DEPARTURE.....-1.9 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 43/30/37/0/T/0/502/89 37 W 11/29 morning low temp. 34F; normal low temp. is now 30F 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 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 RECORDS FOR NOVEMBER 30 HIGH 67 IN 2006 LOW 7 IN 1887, 1929 PRECIP 2.42 INCHES IN 1944 SNOWFALL 10.2 INS IN 1945 PEAK GUST 90 SSW IN 1963 TODAY'S REPORT PREPARED By: Stephanie Radner