BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, MAY 6, 2005 ALL TIMES ARE IN EASTERN STANDARD TIME [unless otherwise noted] Today's observations: 7 A.M. EST Weather: Overcast cirrus Temperature: 48F, Dew point: 36F, Wind: ENE at 10 kt Sea-level pressure: 30.46 inches Hg, steady Visibility: 45 miles BHO SA 1155 200 OVC 45 315/48/36/0710/046/ K LYR ALNG HRZN NW-NE VSBY N 15/ 8/001 50004 10048 20042 10 A.M. EST Weather: Overcast cirrus Temperature: 53F, Dew Point: 28F, Wind: E at 12 kt Visibility: 40 miles Sea-level pressure: 30.45 inches Hg, steady BHO SA 1455 200 OVC 40 310/53/28/0912G17/045/ FEW SC ALQDS/ 8/501 55005 WEATHER SUMMARY FOR THURSDAY, MAY 5 TEMPERATURE (DEGREES F) MAX.....60 NORMAL.....64 ASOS MAX....59 AT 2:34 P.M. MIN.....38 NORMAL.....44 ASOS MIN....38 AT 5:25 A.M. MEAN....49 NORMAL.....54 DEPARTURE FROM 30-YEAR NORMAL......-4 TOTAL DEPARTURE FOR THE MONTH.....-14 (-2.8 DEGREES/DAY) HEATING DEGREE DAY INFORMATION TOTAL HEATING DEGREE DAYS FOR FRIDAY.........16 DEPARTURE.....+4 TOTAL HEATING DEGREE DAYS FOR THE MONTH......75 DEPARTURE....+14 TOTAL HEATING DEGREE DAYS FOR THE SEASON...5998 DEPARTURE....-91 TOTAL HEATING DEGREE DAYS FOR LAST YEAR....5993 DIFFERENCE...-70 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY........23 E AT 5:15 P.M. AEROVANE.........23 E AT 5:10 P.M. ASOS.............21 E AT 5:25 P.M. FASTEST MILE FOR YESTERDAY..........18 ENE AT 3:42 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE.......15 E AT 5:22 P.M. AVERAGE WIND SPEED AND DIRECTION...9.8 WNW ASOS...........10.4 PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE....-0.12 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........0.19 DEPARTURE....-0.45 ASOS..............0.19 TOTAL PRECIPITATION FOR THE YEAR..........21.28 DEPARTURE....+3.18 ASOS.............19.78* *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.....-0.1 TOTAL SNOWFALL FOR THE MONTH................0.0 DEPARTURE.....-0.1 TOTAL SNOWFALL FOR THE SEASON.............119.4 DEPARTURE.....+59.0 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 MORNING LOW 42 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR MAY 6 HIGH 90F IN 1930 LOW 29F IN 1891 PRECIP 1.04 INCHES IN 1890 SNOWFALL TRACE IN 1917,1996 PEAK GUST 65 MPH SSE IN 1989 RECORDS FOR MAY 7 HIGH 93F IN 1930 LOW 33F IN 1970 PRECIP 1.15 INCHES IN 1998 SNOWFALL TRACE IN 1967 PEAK GUST 66e MPH WNW IN 1940 TODAY'S REPORT BY: Andrew Hoell