BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY WEDNESDAY, DECEMBER 7, 2005 ALL TIMES ARE IN EASTERN STANDARD TIME TODAY'S DISCUSSION..... WEST WINDS GUSTING PAST 40 MPH AND TEMPERATURES IN THE UPPER 20'S EARLY AFTERNOON Windchill temperatures have dropped to around 10 to 12 degrees early this afternoon as west winds increased to averages of 25 to 30 MPH with gusts to 40 to 45 MPH. Temperatures are holding steady between 26 and 27 degrees with a high of about 28 degrees so far today. December temperatures are averaging more than 4 degrees COLDER THAN NORMAL so far this month. Today's observations: 7 A.M. clear with clouds along and offshore nne-se-ssw; visibility 35 miles; temp. 20; dewpoint 08; wind SW BHO SA 1155 CLR 35 209/20/10/2411G17/015/ SC ALG/OFFSHR NNE-E AND DSNT SE-SSW LGT HZ/ 8/500 4/001 51014 10023 20019 10 A.M. clear with some clouds w-n-e; visibility 45 miles; temp. 25; dewpoint 8/ wind WSW 22 gusting 31 MPH BHO SA 1455 CLR 45 217/25/8/2419G27/017/ SC W-N-E FEW CI DSNT ESE-SSW FEW PTCHS CCSL SSE-S PK WND 2429/27/ WND 21V27/ 8/509 51008 1 P.M. broken clouds with 50 miles visibility and virga all quads; temp. 27; dewpoint 7; wind W 28 gusting 37 MPH; six hourly max. temp. 28; windchill near 12 deg. BHO SA 1755 E55 BKN 50 202/27/7/2624G32/013/ VIRGA ALQDS PK WND 2534/44/ 8/500 56015 10028 20020 WEATHER SUMMARY FOR TUESDAY, DECEMBER 6: TEMPERATURE (DEGREES F) MAX.....33 NORMAL.....41 HAZEN 33.0 @ 1:56 P.M. MIN.....23 NORMAL.....27 HAZEN 23.4 @ 11:02 P.M. MEAN....28 NORMAL.....34 DEPARTURE FROM 30-YEAR NORMAL.......- 6 TOTAL DEPARTURE FOR THE MONTH.......-26(-4.5 DEGREES/DAY) HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY..........37 DEPARTURE....+ 6 TOTAL HEATING UNITS FOR THE MONTH.........205 DEPARTURE....+26 TOTAL HEATING UNITS FOR THE SEASON.......1270 DEPARTURE...-198 TOTAL HEATING UNITS LAST SEASON TO DATE..1468 DIFFERENCE..-111 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.........31 W AT 4:45 P.M. AEROVANE..........35 W AT 4:45 P.M. ASOS..............29 W AT 4:45 P.M. DAVIS.............30 W AT 4:44 P.M. FASTEST MILE FOR YESTERDAY...........23 w AT 4:46 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE........24 W AT 4:46 A.M. MAXIMUM 1-MINUTE DAVIS AVERAGE.......25 W AT 4:46 P.M. AVERAGE WIND SPEED AND DIRECTION.....11.7 W ASOS..............11.7 WNW [ 290 deg ] DAVIS.............11.6 WNW [ 290 deg ] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M...trace DEPARTURE....-0.15 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........0.24 DEPARTURE....-0.66 ASOS..............0.22 TOTAL PRECIPITATION FOR THE YEAR..........62.51 DEPARTURE...+15.15 ASOS.............61.37* *EXCLUDES 3.19 INCHES OF ERRONEOUS PRECIPITATION RECORDED FROM 1/23-1/28. SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M...........0.1 DEPARTURE....-0.2 TOTAL SNOWFALL FOR THE MONTH.................2.3 DEPARTURE....+0.9 TOTAL SNOWFALL FOR THE SEASON................4.4 DEPARTURE....+0.1 PRELIMINARY CLIMATE SUMMARY FOR DECEMBER 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 12/1 43/35/39/+3/0/0/212/38 29 MPH N 12/2 41/31/36/0/0/0/217/39 46 MPH WSW Aero 51 MPH WSW 12/3 33/26/30/-5/0/0/534/96 46 MPH W Aero 50 MPH W 12/4 28/22/25/-10/0.24/2.2/000/00 22 MPH W 12/5 32/21/27/-8/0/0/.../.. 23 MPH WSW 12/6 33/23/28/-6/T/0.1/.../.. 31 MPH W Aero 36 MPH W 12/7 morning low temp. 19 deg.. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR DECEMBER 7 HIGH 74 IN 1998 LOW 06 IN 1906 PRECIP 1.67 INS. IN 1953 SNOWFALL 4.0 INS. IN 1886 PEAK GUST 76e SE IN 1976 RECORDS FOR DECEMBER 8 HIGH 62 IN 1966 LOW -04 IN 1906 PRECIP 1.54 INS. IN 1969 SNOWFALL 2.5 INS. IN 2001 PEAK GUST 78e W IN 1979 TODAY'S REPORT BY: Robert Skilling