BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, OCTOBER 10, 2008 ALL TIMES ARE IN EASTERN STANDARD TIME UNLESS NOTED Today's observations: ANOTHER BEAUTIFUL SUNNY, MILDER THAN NORMAL DAY EARLY OCTOBER DAY A few high cirrus clouds moved away this morning leaving us with a perfectly clear sky by afternoon. Visibility increased from 60 to 70 miles up to 75 to 80 miles by this afternoon under a beautiful bright blue October sky. The air continues dry with dew points near 40 degrees while temperatures rise above normal to the upper 60's, our normal maximum temperature is now 62 degrees. 8 A.M. EDT Weather: Clear, cirrus distant east-southeast thru southwest Temperature: 54F, Dew point: 43F, Wind: WSW at 12 kts Sea-level pressure: 30.12 inches Hg, rising Visibility: 60 miles, NW 70 miles 6-hourly minimum temperature: 53F 24-hourly rainfall: 0.00 inch BHO SA 1155 CLR 60 200/54/43/2512/012/ CI DSNT ESE-DSNT SW/ 8/001 51022 10057 20053 11 A.M. EDT Weather: Clear, cirrus distant SE Temperature: 63F, Dew point: 38F, Wind: WNW at 12 kts, Wind: Direction variability W-NNW Sea-level pressure: 30.17 inches Hg, rising Visibility: 65 miles, NW 70 miles BHO SA 1455 CLR 65 219/63/38/2912/017/ CI DSNT SE VSBY NW 70 WND 26V33/ 8/001 51019 2 P.M. EDT Weather: Clear (SKC) Temperature: 67F, Dew point: 40F, Wind: W at 10 kts Wind: Direction variability SW-WNW, gust 20 kts past hour Sea-level pressure: 30.17 inches Hg, falling Visibility: 75 miles 6-hourly max. temp. 68F BHO SA 1755 CLR 75 217/67/40/2610/017/ WND 23V30 GST 20 KTS PST HR/ 58002 10068 20054 WEATHER SUMMARY FOR THURSDAY, OCTOBER 9 TEMPERATURE (DEGREES F) MAX.....72 NORMAL.....63 MIN.....55 NORMAL.....45 MEAN....64 NORMAL.....54 DEPARTURE FROM 30-YEAR NORMAL............+10 TOTAL DEPARTURE FOR THE MONTH............- 7 (-1.0 DEGREES/DAY) PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............33 WSW AT 12:39 P.M. AEROVANE.............30 WSW AT 12:39 P.M. ASOS.................32 WSW AT 12:40 P.M. DAVIS................34 WSW AT 12:39 P.M. FASTEST MILE FOR YESTERDAY..............25 WSW AT 12:40 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...........23 WSW AT 12:42 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..........25 WSW AT 12:41 P.M. AVERAGE............ 15.9 SW ASOS................15.3 DAVIS...............16.1 SSW [210 deg] 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..........0.62 DEPARTURE.......-0.64 ASOS..............0.63 TOTAL PRECIPITATION FOR THE YEAR..........43.52 DEPARTURE.......+4.66 ASOS.............46.11 # # Includes erroneous ASOS precipitation data on 2/13/08. PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 2008 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane recording wind system gust when significant TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized 10/1 68/58/63/+6/0.49/120/17 38 SW TSTM # 10/2 62/46/54/-2/0.12/455/65 45 W 10/3 62/45/54/-2/T/376/54 44 SSW Aero 43 MPH SSW 10/4 61/40/51/-5/0.00/612/88 32 WSW 10/5 53/45/49/-6/T/000/00 18 WNW 10/6 58/39/49/-6/0.00/303/44 28 WNW 10/7 64/37/51/-4/0.00/.../.. 23 WNW 10/8 69/43/56/+2/0.00/.../.. 32 S Aero 30 MPH S 10/9 72/55/64/+10/0.02/.../.. 33 WSW 10/10 morning low temp. 53F; the normal low 45F # Thunderstorm gust NEW DAILY RECORDS FOR OCTOBER None... DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR OCTOBER 10 HIGH 85 IN 1949 LOW 27 IN 1929 PRECIP 2.02 INCHES IN 1998 SNOWFALL 6.8 INCHES IN 1979 (RECORD FOR MONTH) PEAK GUST 59 MPH WNW IN 1958 RECORDS FOR OCTOBER 11 HIGH 80 IN 1919,1949 LOW 28 IN 1993 PRECIP 0.96 INCHES IN 1903 SNOWFALL (NONE) PEAK GUST 66e MPH WNW IN 1941 TODAY'S REPORT PREPARED By: Robert Skilling