BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, OCTOBER 21, 2005 ALL TIMES ARE IN EASTERN STANDARD TIME [unless otherwise noted] Today's observations: 7 A.M. EST Weather: Clear with a few cirrus Temperature: 42F, Dew point: 36F, Wind: WSW at 10 kt Sea-level pressure: 30.07 inches Hg, rising Visibility: 55 miles BHO SA 1155 CLR 55 184/42/36/2810/007/ FEW CI E-W PTCHY GF ALQDS THN K LYR ALNG HRZN NW-NE/ 8/001 51006 10042 20039 10 A.M. EST Weather: Broken cirrus Temperature: 52F, Dew point: 36F, Wind: W at 10 kt Sea-level pressure: 30.06 inches Hg, falling Visibility: 60 miles BHO SA 1455 200 SCT 220 -BKN 60 181/52/36/2710/006/ FEW SC FRMG ALQDS CLR DSNT N-NE K LYR ALNG HRZN W-E/ 8/501 58003 WEATHER SUMMARY FOR THURSDAY, OCTOBER 20 TEMPERATURE (DEGREES F) MAX.....54 NORMAL.....59 ASOS.....54 AT 1:44 P.M. MIN.....41 NORMAL.....42 ASOS.....41 AT 11:47 P.M. MEAN....48 NORMAL.....50 DEPARTURE FROM 30-YEAR NORMAL.......-2 TOTAL DEPARTURE FOR THE MONTH......+86 (+4.1 DEGREES/DAY) HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY..........17 DEPARTURE.....+2 TOTAL HEATING UNITS FOR THE MONTH.........161 DEPARTURE....-72 TOTAL HEATING UNITS FOR THE SEASON........233 DEPARTURE...-173 TOTAL HEATING UNITS LAST SEASON TO DATE...329 DIFFERENCE...-96 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.........38 W AT 12:49 A.M. AEROVANE..........40 W AT 12:50 A.M. ASOS..............36 W AT 12:54 A.M. DAVIS.............35 W FASTEST MILE FOR YESTERDAY...........29 W AT 12:54 A.M. (CORR.) MAXIMUM 2-MINUTE ASOS AVERAGE........25 W AT 12:55 A.M. AVERAGE WIND SPEED AND DIRECTION...13.8 W ASOS............13.1 *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....+7.58 ASOS.............10.51 TOTAL PRECIPITATION FOR THE YEAR..........53.28 DEPARTURE...+13.03 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 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR OCTOBER 21 HIGH 79F IN 1979 LOW 24F IN 1974 PRECIP 2.39 INCHES IN 1944 SNOWFALL TRACE IN 1895,1907,1940 PEAK GUST 69e MPH S IN 1976 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 TODAY'S REPORT BY: Andrew Hoell