BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, NOVEMBER 27, 2009 ALL TIMES ARE IN EASTERN STANDARD TIME Today's observations: 7 A.M. Weather: Sky obscured with fog, rain Temperature: 41F, Dew point: 41F, Wind: NNW at 14 kt Sea-level pressure: 29.96 inches Hg, rising Visibility: 1/16 mile, rain and fog 6-hour minimum temp: 41F 24-hour precipitation: 0.38 inches BHO SA 1155 W1 X 1/16RF 982/41/41/3314/948/ 8//// 58026 MANUAL 6036/ ASOS 60034 MANUAL 70038 ASOS 70036 10044 20041 10 A.M. Weather: Overcast nimbostratus, stratus drifting over summit Temperature: 42F, Dew point: 42F, Wind: NNW at 12G25 kts Wind: Direction variable W to N Sea-level pressure: 29.36 inches Hg, falling rapidly Visibility: 1 mile, variable 1/8 to 2 miles, rain, fog 3-hour precipitation: 0.30 in. BHO SA 1455 E4 OVC 1VR-F 943/42/42/3312G25/936/ STRA DRFTG OVR SMT VSBY 1/8V2 WND 26V01 PRESFR/ 8/72/ 58039 MANUAL 6030/ ASOS 60032 1 P.M. Weather: Overcast nimbostratus, stratus drifting over summit Temperature: 43F, Dew point: 43F, Wind: WNW at 11G20 kts Wind: Direction variable W to NNW Sea-level pressure: 29.24 inches Hg, falling Visibility: 1 mile,variable 1/2 to 2 miles, rain, fog 6-hour maximum temp: 43F 6-hour precipitation: 0.43 in. BHO SA 1755 E4 OVC 1VR-F 902/43/43/3011G20/924/ STRA DRFTG OVR SMT VSBY 1/2V2 WND 26V34/ 8/72/ 56041 MANUAL 6043/ ASOS 60045 10043 20041 WEATHER SUMMARY FOR THURSDAY, NOVEMBER 26 TEMPERATURE (DEGREES F) MAX.....50 NORMAL.....45 MIN.....44 NORMAL.....31 MEAN....47 NORMAL.....38 DEPARTURE FROM 30-YEAR AVERAGE.............+9 TOTAL DEPARTURE FOR THE MONTH............+130 [+4.8 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............18 DEPARTURE........-9 TOTAL HEATING UNITS FOR THE MONTH...........455 DEPARTURE......-132 TOTAL HEATING UNITS FOR THE SEASON.........1076 DEPARTURE......-102 TOTAL HEATING UNITS LAST SEASON TO DATE....1138 DIFFERENCE......-62 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.............22 N AT 11:41 P.M. AEROVANE..............21 N AT 11:41 P.M. ASOS..................21 NNE AT 11:41 P.M. DAVIS.................22 N AT 11:41 P.M. FASTEST MILE FOR YESTERDAY...............12 N AT 11:42 P.M. * MAXIMUM 2-MINUTE ASOS AVERAGE............14 NNE AT 11:42 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE...........14 N AT 11:41 P.M. AVERAGE WIND SPEED AND DIRECTION........4.4 ENE ASOS.................4.5 DAVIS................4.6 N [359 DEG] * last of several occurrences PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.38 DEPARTURE....+0.23 ASOS..............0.36 TOTAL PRECIPITATION FOR THE MONTH..........3.58 DEPARTURE....-0.46 ASOS..............3.60 TOTAL PRECIPITATION FOR THE YEAR..........48.69 DEPARTURE....+2.63 ASOS.............49.91 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE.....-0.1 TOTAL SNOWFALL FOR THE MONTH................0.0 DEPARTURE.....-2.3 TOTAL SNOWFALL FOR THE SEASON...............3.0 DEPARTURE.....+0.5 PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 2009 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane wind recording system gust when significant TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized 11/1 58/44/51/+4/0.05/167/27 22 WNW 11/2 49/42/46/0/T/099/16 29 NE 11/3 57/36/47/+1/0/474/77 32 W AERO 32 MPH W 11/4 49/34/42/-4/0/514/84 24 W 11/5 46/36/41/-4/0.01/006/01 21 N 11/6 47/31/39/-6/0/419/69 38 WNW AERO 38 MPH WNW 11/7 49/29/39/-6/0/575/95 33 S 11/8 66/42/54/+10/0/549/91 31 SSW 11/9 68/49/59/+15/0/486/81 35 S AERO 35 MPH S 11/10 62/50/56/+12/0/000/00 23 SW 11/11 50/43/47/+4/0/113/19 31 NNE 11/12 49/41/45/+2/0/125/21 34 NE AERO 31 MPH NNE 11/13 49/44/47/+4/0/000/00 39 NNE AERO 37 MPH NNE 11/14 59/49/54/+12/2.08/000/00 39 NE AERO 38 MPH NE 11/15 60/52/56/+14/0.06/012/02 18 W 11/16 56/43/50/+8/0/527/90 30 NW AERO 31 MPH NW 11/17 47/35/41/0/0/576/99 28 WNW 11/18 49/34/42/+1/0/313/54 15 SSW 11/19 59/41/50/+9/0/226/39 30 SE 11/20 65/44/55/+15/0.57/219/38 40 W AERO 41 MPH W 11/21 55/41/48/+8/0/373/65 25 SW 11/22 49/38/44/+4/0/292/51 28 ENE 11/23 47/42/45/+6/0.22/000/00 33 NE AERO 31 MPH ENE 11/24 46/44/45/+6/0.11/000/00 33 NE Aero 30 MPH NE 11/25 47/43/45/+6/.../000/00 21 N 11/26 50/44/47/+9/.../000/00 22 N 11/27 our morning low temp: 41F; the normal low is 30F NEW DAILY RECORD FOR NOVEMBER 2009 11/14: NEW RECORD DAILY RAINFALL 2.08 INCHES; surpasses previous 1.87 inches in 1972. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR NOVEMBER 27 HIGH 68 IN 1896 LOW 5 IN 1932 PRECIP 1.92 INS IN 1898 SNOWFALL 16.0 INS IN 1898 PEAK GUST 68 NW IN 1997 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 TODAY'S REPORT PREPARED BY: Stephanie Radner