BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, MAY 14, 2005 ALL TIMES ARE IN EASTERN STANDARD TIME [unless otherwise noted] EARLY MORNING SUNSHINE TURNS TO LOW CLOUDS... FRIDAY MINIMUM TEMPERATURE TIES RECORD FOR THE DATE... MAY CONTINUES ON THE COOL SIDE... There was about an hour and a half of partial sunshine after sunrise this morning, which was quickly replaced by low clouds after 9 AM EDT. A few drops of rain fell in a brief shower around 9:30 AM EDT bringing a scant trace of rain this morning. The low temperature on Friday of 35 tied the record low for the date previously set in 1914. The total temperature departure for May has dropped to -55, giving a mean temperature for the month of 4.4 degrees cooler than normal. Today's observations: 7 A.M. EST Weather: Mostly cloudy with altocumulus Temperature: 54F, Dew point: 26F, Wind: SE 12 mph Sea-level pressure: 30.03 inches, falling Visibility: 35 miles BHO SA 1155 80 SCT 110 BKN 35 170/54/26/1310/003/ SC DSNT SW-W/ 8/570 58017 10054 20047 10 A.M. EST Weather: Overcast with stratocumulus Temperature: 55F, Dew point: 35F, Wind: SSE 7 mph Sea-level pressure: 30.02 inches, falling Visibility: 30 miles BHO SA 1455 E35 BKN 50 OVC 30 167/55/35/1506/002/ WND LGT/ 8/5// 58003 6000/ WEATHER SUMMARY FOR FRIDAY, MAY 13 TEMPERATURE (DEGREES F) MAX.....64 NORMAL.....66 ASOS.....63 AT 4:30 P.M. MIN.....35 NORMAL.....46 ASOS.....35 AT 5:39 A.M. MEAN....50 NORMAL.....56 DEPARTURE FROM 30-YEAR NORMAL......-6 TOTAL DEPARTURE FOR THE MONTH.....-55 (-4.4 DEGREES/DAY) HEATING DEGREE DAY INFORMATION TOTAL HEATING DEGREE DAYS FOR FRIDAY.........15 DEPARTURE.....+6 TOTAL HEATING DEGREE DAYS FOR THE MONTH.....197 DEPARTURE....+50 TOTAL HEATING DEGREE DAYS FOR THE SEASON...6120 DEPARTURE....-53 TOTAL HEATING DEGREE DAYS FOR LAST YEAR....6082 DIFFERENCE...+38 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY........28 WNW AT 9:53 A.M. AEROVANE.........28 W AT 4:10 P.M.* ASOS.............24 W AT 4:10 P.M. DAVIS............26 W AT 1:56 P.M. FASTEST MILE FOR YESTERDAY..........20 W AT 3:41 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE.......20 WNW AT 3:44 P.M. AVERAGE WIND SPEED AND DIRECTION...11.4 WNW ASOS............11.8 *LAST OF SEVERAL OCCURRENCES 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..........1.72 DEPARTURE....+0.11 ASOS..............1.67 TOTAL PRECIPITATION FOR THE YEAR..........22.81 DEPARTURE....+3.40 ASOS.............21.70* *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/-1/0.14/118/14 33 MPH WNW 5/2 63/39/51/-1/0.05/593/70 43 MPH S 5/3 58/38/48/-5/0/604/71 30 MPH WSW 5/4 59/40/50/-3/T/400/47 21 MPH E 5/5 60/38/49/-4/0/777/91 23 MPH E 5/6 54/42/48/-6/0.08/103/12 26 MPH NNE 5/7 44/39/42/-12/1.19/000/00 58 MPH N 5/8 47/39/43/-11/0.22/000/00 43 MPH NNW 5/9 52/43/48/-7/0.04/026/03 36 MPH N 5/10 64/46/55/0/0/502/58 20 MPH E 5/11 75/46/61/+6/0/.../.. 27 MPH S 5/12 60/41/51/-5/0/0/.../.. 40 MPH NW 5/13 64/35/50/-6/0/0/.../.. 28 MPH WNW 5/14 ..overnight low 47 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR MAY 14 HIGH 85F IN 1961 LOW 33F IN 1895 PRECIP 0.92 INCHES IN 1931 PEAK GUST 50e MPH SW IN 1976 RECORDS FOR MAY 15 HIGH 93F IN 1900 LOW 36F IN 1947,1985 PRECIP 1.63 INCHES IN 1978 PEAK GUST 53e MPH NE IN 1978, W 2002 TODAY'S REPORT BY: Mike Iacono