BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, OCTOBER 22, 2005 ALL TIMES ARE IN EASTERN STANDARD TIME [unless otherwise noted] Today's observations: 7 A.M. EST Weather: Broken altocumulus, overcast cirrus Temperature: 41F, Dew point: 37F, Wind: N at 13 kt Sea-level pressure: 29.98 inches Hg, falling Visibility: 15 miles BHO SA 1155 110 BKN 200 OVC 15 152/41/37/0113/998/ FEW SC N-E FEW BINOVC N-NE THN K LYR ALNG HRZN ALQDS HAZY/ 8/471 55002 10041 20039 10 A.M. EST Weather: Scattered stratocumulus, overcast altocumulus Temperature: 47F, Dew point: 43F, Wind: NE at 14 kt Sea-level pressure: 29.93 inches Hg, falling Visibility: 20 miles Precipitation past 3 hours: Trace BHO SA 1455 20 SCT 80 OVC 20 137/47/43/0314/993/ FEW BINOVC NW DISC OF SUN VSBL K LYR ALNG HRZN W/ 8/47/ 58015 6000/ WEATHER SUMMARY FOR FRIDAY, OCTOBER 21 TEMPERATURE (DEGREES F) MAX.....56 NORMAL.....58 ASOS.....56 AT 2:24 P.M. MIN.....39 NORMAL.....41 ASOS.....39 AT 6:14 A.M. MEAN....48 NORMAL.....50 DEPARTURE FROM 30-YEAR NORMAL.......-2 TOTAL DEPARTURE FOR THE MONTH......+84 (+3.8 DEGREES/DAY) HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY..........17 DEPARTURE.....+2 TOTAL HEATING UNITS FOR THE MONTH.........178 DEPARTURE....-70 TOTAL HEATING UNITS FOR THE SEASON........250 DEPARTURE...-171 TOTAL HEATING UNITS LAST SEASON TO DATE...350 DIFFERENCE..-100 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.........22 W AT 12:24 A.M. AEROVANE..........22 W AT 12:20 A.M. ASOS..............17 W AT 12:50 A.M. DAVIS.............19 W FASTEST MILE FOR YESTERDAY...........15 W AT 12:15 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE........14 W AT 1:10 A.M. AVERAGE WIND SPEED AND DIRECTION....8.0 W ASOS.............7.8 *LAST OF SEVERAL OCCURRENCES 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.........10.38 DEPARTURE....+7.44 ASOS.............10.51 TOTAL PRECIPITATION FOR THE YEAR..........53.28 DEPARTURE...+12.89 ASOS.............52.18* *EXCLUDES 3.19 INCHES OF ERRONEOUS PRECIPITATION RECORDED FROM 1/23-1/28. PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 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 10/1 70/49/60/+3/0/690/98 21 MPH S 10/2 75/52/64/+8/0/681/97 23 MPH SSW 10/3 73/56/65/+9/0/656/94 15 MPH S 10/4 74/55/65/+9/T/382/55 17 MPH S 10/5 78/56/67/+12/0/471/68 17 MPH S 10/6 77/64/71/+16/T/366/53 25 MPH S 10/7 78/65/72/+17/0.03/158/23 31 MPH S Aero 34 MPH S 10/8 71/49/60/+6/1.32/000/00 45 MPH S Aero 50 MPH S 10/9 52/47/50/-4/1.33/000/00 50 MPH NNE Aero 48 MPH NNE 10/10 53/50/52/-2/0.19/000/00 25 MPH NNE 10/11 54/50/52/-1/0.28/000/00 42 MPH NNE Aero 40 MPH NE 10/12 53/49/51/-2/0.22/000/00 47 MPH NE Aero 45 MPH NE 10/13 54/52/53/+1/.../000/00 40 MPH NE 10/14 56/53/55/+3/.../000/00 37 MPH NE Aero 35 MPH NE 10/15 58/49/54/+2/.../000/00 48 MPH NE Aero 47 MPH NE 10/16 58/48/53/+2/0/331/50 55 MPH WSW Aero 57 MPH W 10/17 60/44/52/+1/0/.../.. 47 MPH W Aero 49 MPH W 10/18 64/43/54/+3/0.03/.../.. 42 MPH W Aero 42 MPH W 10/19 64/46/55/+4/0/.../.. 35 MPH W Aero 36 MPH S 10/20 54/41/48/-2/0/.../.. 38 MPH W Aero 40 MPH W 10/21 56/39/48/-2/0/.../.. 22 MPH W DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR OCTOBER 22 HIGH 85F IN 1979 LOW 22F IN 1940 PRECIP 1.37 INCHES IN 1898 SNOWFALL TRACE IN 1969 PEAK GUST 67 MPH ESE IN 1988 RECORDS FOR OCTOBER 23 HIGH 82F IN 1947 LOW 24F IN 1969 PRECIP 2.18 INCHES IN 1956 SNOWFALL 3.0 INCHES IN 1891 PEAK GUST 78e MPH NW IN 1941 TODAY'S REPORT BY: Andrew Hoell