BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, MAY 8, 2005 ALL TIMES ARE IN EASTERN STANDARD TIME [unless otherwise noted] Today's observations: 7 A.M. EST Weather: Overcast with drizzle and fog Temperature: 39F, Dew point: 38F, Wind: NNW at 15 kt Sea-level pressure: 29.75 inches Hg, rising Visibility: 5 miles BHO SA 1155 5 OVC 5L-F 074/39/38/3315G29/975/ PK WND 3330/33/ 8/4/// 53012 70071 10040 20039 10 A.M. EST Weather: Overcast stratocumulus Temperature: 43F, Dew point: 39F, Wind: NNW at 20 kt Sea-level pressure: 29.78 inches Hg, rising Visibility: 10 miles BHO SA 1455 15 OVC 10 084/43/39/3320G31/978/ PK WND 3334/16/ 8/4// 53010 6000/ WEATHER SUMMARY FOR SATURDAY, MAY 7 TEMPERATURE (DEGREES F) MAX.....44 NORMAL.....64 ASOS.....43 AT 8:41 A.M. MIN.....39 NORMAL.....44 ASOS.....39 AT MIDNIGHT P.M. MEAN....42 NORMAL.....54 DEPARTURE FROM 30-YEAR NORMAL.....-12 TOTAL DEPARTURE FOR THE MONTH.....-32 (-4.6 DEGREES/DAY) HEATING DEGREE DAY INFORMATION TOTAL HEATING DEGREE DAYS FOR FRIDAY.........23 DEPARTURE....+12 TOTAL HEATING DEGREE DAYS FOR THE MONTH.....115 DEPARTURE....+32 TOTAL HEATING DEGREE DAYS FOR THE SEASON...6038 DEPARTURE....-74 TOTAL HEATING DEGREE DAYS FOR LAST YEAR....6042 DIFFERENCE...-27 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY........58 N AT 8:40 A.M. AEROVANE.........62 N AT 8:38 A.M. ASOS.............48 N AT 10:50 A.M. FASTEST MILE FOR YESTERDAY..........44 N AT 8:40 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE.......35 N AT 11:24 A.M. AVERAGE WIND SPEED AND DIRECTION...22.2 NNW ASOS............21.6 PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.71 DEPARTURE....+0.59 ASOS..............0.69 TOTAL PRECIPITATION FOR THE MONTH..........1.49 DEPARTURE....+0.61 ASOS..............1.46 TOTAL PRECIPITATION FOR THE YEAR..........22.58 DEPARTURE....+3.90 ASOS.............21.05* *EXCLUDES 3.19 INCHES OF ERRONEOUS PRECIPITATION RECORDED FROM 1/23-1/28. SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE......0.0 TOTAL SNOWFALL FOR THE MONTH................0.0 DEPARTURE.....-0.1 TOTAL SNOWFALL FOR THE SEASON.............119.4 DEPARTURE....+59.3 PRELIMINARY CLIMATE SUMMARY FOR MAY 2005......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 5/1 57/44/51/-1/0.14/.../.. 33 MPH WNW 5/2 63/39/51/-1/0.05/.../.. 43 MPH S 5/3 58/38/48/-5/0/.../.. 30 MPH WSW 5/4 59/40/50/-3/T/0/.../.. 21 MPH E 5/5 60/38/49/-4/0/0/.../.. 23 MPH E 5/6 54/42/48/-6/0.08/0/.../.. 26 MPH NNE 5/7 44/39/42/-12/.../0/000/00/ 58 MPH N DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR MAY 8 HIGH 89F IN 2000 LOW 29F IN 1956 PRECIP 1.48 INCHES IN 1886 SNOWFALL TRACE IN 1898, 1947 PEAK GUST 68e MPH NNW IN 1943 RECORDS FOR MAY 9 HIGH 93F IN 2000 LOW 31F IN 1947 PRECIP 2.72 INCHES IN 1954 SNOWFALL 5.0 INCHES IN 1977 PEAK GUST 70e MPH NE IN 1977 TODAY'S REPORT BY: Andrew Hoell