BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, SEPTEMBER 30, 2005 ALL TIMES ARE IN EASTERN STANDARD TIME [unless otherwise noted] Today's observations: 7 A.M. EST Weather: Scattered altocumulus, thin overcast cirrus Temperature: 43F, Dew point: 39F, Wind: W at 11 kt Sea-level pressure: 30.14 inches Hg, rising Visibility: 80 miles BHO SA 1155 160 SCT 200 BKN 250 -OVC 80 205/43/39/2811/014/ THN K LYR ALNG HRZN NW-NE FEW ACC SE POND SMOKE HOUGHTONS POND E/ 8/072 53026 70035 10045 20042 10 A.M. EST Weather: Thin broken cirrus Temperature: 54F, Dew point: 39F, Wind: W at 9 kt Sea-level pressure: 30.17 inches Hg, rising Visibility: 80 miles BHO SA 1455 200 SCT 250 -BKN 80 217/54/39/2809/017/ 8/002 50012 1 P.M. EST Weather: Overcast cirrus Temperature: 60F, Dew point: 40F, Wind: W at 5 kt Sea-level pressure: 30.16 inches Hg, rising Visibility: 70 miles BHO SA 1755 200 BKN 250 -OVC 70 214/60/40/2805/016/ FEW SC FRMG DSNT E-SE WND L/V/ 8/502 58003 10059 20043 WEATHER SUMMARY FOR THURSDAY, SEPTEMBER 29 TEMPERATURE (DEGREES F) MAX.....73 NORMAL.....66 ASOS.....73 AT 12:30 P.M. MIN.....46 NORMAL.....49 ASOS.....46 AT MIDNIGHT P.M. MEAN....60 NORMAL.....58 DEPARTURE FROM 30-YEAR NORMAL....+2 TOTAL DEPARTURE FOR THE MONTH....+129 (4.4 DEGREES/DAY) PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.........62 S AT 12:42 P.M. AEROVANE..........72 S AT 12:38 P.M. ASOS..............62 S AT 12:35 P.M. DAVIS.............61 S FASTEST MILE FOR YESTERDAY...........52 S AT 12:42 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE........49 S AT 12:43 P.M. AVERAGE WIND SPEED AND DIRECTION...21.8 SE ASOS............21.8 PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.35 DEPARTURE....-0.14 ASOS..............0.35 TOTAL PRECIPITATION FOR THE MONTH..........3.81 DEPARTURE....-0.18 ASOS..............3.82 TOTAL PRECIPITATION FOR THE YEAR..........42.90 DEPARTURE....+5.59 ASOS.............41.67* *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 9/25 65/50/58/-1/0/296/41 29 S 9/26 72/61/67/+8/0.38/007/01 39 S Aero 45 MPH S 9/27 69/52/61/+3/T/.../.. 35 NW Aero 40 MPH NW 9/28 70/50/60/+2/0/.../.. 9/29 73/46/60/+2/0.35/.../.. 62 S Aero 72 MPH S 9/30 ...overnight low 42 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR SEPTEMBER 30 HIGH 84F IN 1986 LOW 31F IN 1992 PRECIP 1.93 INCHES IN 1946 PEAK GUST 58 MPH SSE IN 1999 RECORDS FOR OCTOBER 1 HIGH 85F IN 1927 LOW 30F IN 1992 PRECIP 1.44 INCHES IN 1984 PEAK GUST 68e MPH SSE IN 1977 TODAY'S REPORT BY: Andrew Hoell