BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, NOVEMBER 23, 2007 ALL TIMES ARE IN EASTERN STANDARD TIME Today's observations: 7 A.M. Weather: Broken stratocumulus, altocumulus, cirrus Temperature: 31F, Dew point: 22F, Wind: W at 10 kts Sea-level pressure: 29.95 inches Hg, rising Visibility: 60 miles 6-hour min temp: 30F 24-hour precip: 0.01 in. BHO SA 1155 E34 BKN 100 BKN 250 BKN 60 142/31/22/2710/995/ FEW SCSL SW-NW/ 8/571 53023 MANUAL 70001 ASOS 70002 10036 20030 10 A.M. Weather: Scattered cumulus, thin broken cirrus Temperature: 36F, Dew point: 21F, Wind: W at 12G20 kts Sea-level pressure: 29.99 inches Hg, rising Visibility: 70 miles BHO SA 1455 E34 SCT 250 -BKN 70 156/36/21/2712G20/999/ 8/501 51014 1 P.M. Weather: Thin scattered cirrus, patches dense cirrus, few distant stratocumulus Temperature: 36F, Dew point: 19F, Wind: W at 16G27 kts Wind: variable direction SW-NNW Wind: peak gust last hour 27 kts W at 12:51 P.M. Sea-level pressure: 29.98 inches Hg, falling Visibility: 70 miles 6-hour max temp: 37F BHO SA 1755 250 -SCT 70 152/36/19/2816G27/998/ FEW DSNT SC ALQDS PTCHS DENSE CI PK WND 2727/51 WND 23V33/ 8/502 55004 10037 20031 WEATHER SUMMARY FOR THURSDAY, NOVEMBER 22 TEMPERATURE (DEGREES F) MAX.....64 NORMAL.....47 MIN.....40 NORMAL.....32 MEAN....52 NORMAL.....40 DEPARTURE FROM 30-YEAR NORMAL..........+12 TOTAL DEPARTURE FOR THE MONTH..........-38 [-1.9 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............13 DEPARTURE......-12 TOTAL HEATING UNITS FOR THE MONTH...........518 DEPARTURE......+37 TOTAL HEATING UNITS FOR THE SEASON..........864 DEPARTURE.....-208 TOTAL HEATING UNITS LAST SEASON TO DATE.....909 DIFFERENCE.....-45 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............36 W AT 10:23 P.M. AEROVANE.............35 W AT 10:21 P.M. ASOS.................36 W AT 10:21 P.M. DAVIS................37 WSW AT 10:23 P.M. FASTEST MILE FOR YESTERDAY..............25 W AT 22:21 P.M. * MAXIMUM 2-MINUTE ASOS AVERAGE...........25 W AT 10:21 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..........27 W AT 10:21 P.M. AVERAGE WIND SPEED AND DIRECTION...... 15.0 SSE ASOS............... 15.5 DAVIS.............. 14.0 S [181 deg] * last of several occurrences PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.01 DEPARTURE....-0.15 ASOS..............0.02 TOTAL PRECIPITATION FOR THE MONTH..........3.03 DEPARTURE....-0.41 ASOS..............3.04 TOTAL PRECIPITATION FOR THE YEAR..........38.57 DEPARTURE....-6.89 ASOS.............37.87 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE.....-0.1 TOTAL SNOWFALL FOR THE MONTH................0.8 DEPARTURE.....-1.0 TOTAL SNOWFALL FOR THE SEASON...............0.8 DEPARTURE.....-1.2 PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 2007...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 * entries for daily snowfall beginning 19th 11/1 66/42/54/+7/0/050/08 37 S 11/2 50/37/44/-2/0/446/73 29 NE 11/3 46/40/43/-3/0.95/000/00 51 N Aero 50 MPH NNW 11/4 54/37/46/0/0/503/82 33 W Aero 33 MPH W 11/5 56/40/48/+3/0/483/79 29 SE 11/6 53/37/45/0/0.75/000/00 35 SSE Aero 35 MPH SSE 11/7 50/32/41/-4/0/551/91 30 W 11/8 43/28/36/-8/0/494/82 22 W 11/9 44/32/38/-6/0.09/331/55 21 NNE 11/10 39/28/34/-10/0.05/383/64 32 N 11/11 42/24/33/-10/0/590/99 23 WNW 11/12 42/27/35/-8/0.02/024/04 25 SSE 11/13 55/42/49/+6/0.33/308/52 28 S 11/14 58/41/50/+8/0/507/86 37 S 11/15 64/40/52/+10/0.41/035/06 44 SSE Aero 46 MPH SSE 11/16 44/30/37/-5/0.31/158/27 51 W Aero 54 MPH W 11/17 40/28/34/-7/0/350/60 37 W 11/18 41/29/35/-6/0/495/85 25 ENE 11/19 36/30/33/-8/0.01/0.1/030/05 29 N ** sunshine data corrected 11/20 37/29/33/-7/0.09/0.7/000/00 22 SE 11/21 48/32/40/0/0.01/0/000/00 21 N 11/22 64/40/52/+12/0.01/0/212/37 36 W 11/23 morning low temp. 30F; normal low is now 32F NEW DAILY RECORDS FOR NOVEMBER 2007: NONE DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR NOVEMBER 23 HIGH 73 IN 1931 LOW 09 IN 1888 PRECIP 2.33 INS IN 2006 SNOWFALL 5.5 INS IN 1989 PEAK GUST 64e S IN 1953 RECORDS FOR NOVEMBER 24 HIGH 69 IN 1931 LOW 07 IN 1897 PRECIP 1.76 INCHES IN 1901 SNOWFALL 4.5 INS IN 1936 PEAK GUST 69 SSW IN 1959 TODAY'S REPORT PREPARED By: Stephanie Radner