BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, SEPTEMBER 25, 2005 ALL TIMES ARE IN EASTERN STANDARD TIME [unless otherwise noted] Today's observations: 7 A.M. EST Weather: Thin scattered cirrus Temperature: 55F, Dew point: 47F, Wind: S at 9 kt Sea-level pressure: 30.26 inches Hg, rising Visibility: 65 miles BHO SA 1155 250 -SCT 65 249/55/47/1809/026/ PTCHY GF E-SW THN K LYR ALNG HRZN ALQDS VSBY 40 BLO INVRSN W/ 8/001 53003 10054 20050 10 A.M. EST Weather: Broken cirrus Temperature: 62F, Dew point: 47F, Wind: S at 12 kt Sea-level pressure: 30.24 inches Hg, falling Visibility: 50 miles BHO SA 1455 200 SCT 250 -BKN 50 243/62/47/1712G16/024/ 8/008 58006 1 P.M. EST Weather: Broken altocumulus, overcast cirrus Temperature: 64F, Dew point: 46F, Wind: S at 14 kt Sea-level pressure: 30.19 inches Hg, falling Visibility: 65 miles BHO SA 1755 150 BKN 200 OVC 65 224/64/46/1714G18/019/ FEW BINOVC E/ 8/071 58019 10064 20055 WEATHER SUMMARY FOR SATURDAY, SEPTEMBER 24 TEMPERATURE (DEGREES F) MAX.....63 NORMAL.....68 ASOS.....63 AT 2:18 P.M. MIN.....49 NORMAL.....50 ASOS.....48 AT 11:18 P.M. MEAN....56 NORMAL.....59 DEPARTURE FROM 30-YEAR NORMAL......-3 TOTAL DEPARTURE FOR THE MONTH....+115 (+4.8 DEGREES/DAY) PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.........23 N AT 3:32 A.M. AEROVANE..........25 N AT 12:52 A.M. ASOS..............21 N AT 3:56 A.M. DAVIS.............22 N FASTEST MILE FOR YESTERDAY...........17 N AT 3:05 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE........16 N AT 3:01 A.M. AVERAGE WIND SPEED AND DIRECTION...10.2 N ASOS............10.5 PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE....-0.14 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........3.08 DEPARTURE....-0.21 ASOS..............3.08 TOTAL PRECIPITATION FOR THE YEAR..........42.17 DEPARTURE....+5.56 ASOS.............40.93* *EXCLUDES 3.19 INCHES OF ERRONEOUS PRECIPITATION RECORDED FROM 1/23-1/28. PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER 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 9/1 81/73/73/+6/0.41/773/98 28 WNW 9/2 83/62/73/+7/0/786/100 23 WSW 9/3 78/61/70/+4/0/782/100 25 WNW 9/4 78/60/69/+3/0/725/93 21 NE 9/5 70/57/64/-1/0/770/99 24 NNE 9/6 74/56/65/0/775/100 16 S 9/7 81/57/69/+4/0/742/96 21 S 9/8 83/59/71/+6/0/670/87 20 SSW 9/9 70/60/65/+1/0/276/36 21 NW 9/10 71/53/62/-2/0/756/99 21 NNW 9/11 73/49/61/-3/0/709/93 28 SSW 9/12 88/60/74/+11/0/691/91 29 SW 9/13 81/66/74/+11/0/688/91 23 SSE 9/14 85/65/75/+12/0/550/73 27 S 9/15 72/66/69/+7/2.43/0/0 23 WNW 9/16 68/62/65/+3/0.13/0/0 24 NNE 9/17 67/61/64/+2/0.06/0/0 23 ENE 9/18 74/60/67/+6/0/186/25 17 W 9/19 79/57/68/+7/0/680/92 17 W 9/20 73/62/68/+7/0.05/15/2 35 W 9/21 77/58/68/+8/0/.../.. 28 W 9/22 82/62/72/+12/0/.../.. 35 SSW 9/23 78/56/67/+7/T/.../.. 30 S 9/24 63/49/56/-3/0/.../.. 23 N DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR SEPTEMBER 25 HIGH 87F IN 1970 LOW 31F IN 1950 PRECIP 2.68 INCHES IN 1961 PEAK GUST 63 MPH SSW IN 1991 RECORDS FOR SEPTEMBER 26 HIGH 87F IN 1958 LOW 36F IN 1905,1922,1978 PRECIP 3.84 INCHES IN 1888 PEAK GUST 54e MPH S IN 1977 TODAY'S REPORT BY: Andrew Hoell