BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, NOVEMBER 6, 2009 ALL DATA IN EASTERN STANDARD TIME Today's observations: 7 A.M. Weather: Broken stratocumulus, altocumulus, cirrus Temperature: 33F, Dew point: 31F, Wind: WNW at 12G21 kts Sea-level pressure: 30.03 inches Hg, rising Visibility: 20 miles, 15 miles N-E, 35 miles SW-NW 6-hour minimum temp: 32F 24-hourly precipitation: 0.01 in. BHO SA 1155 E30 BKN 140 BKN 250 BKN 20 168/33/31/3012G21/003/ VSBY N-E 15 SW-NW 35/ 8/531 53023 MANUAL 70001 ASOS 70001 10036 20032 10 A.M. Weather: Scattered stratocumulus, cirrus, few stratocumulus lenticularis Temperature: 41F, Dew point: 30F, Wind: NNW at 12G24 kts Sea-level pressure: 30.11 inches Hg, rising Visibility: 40 miles BHO SA 1455 55 SCT 250 SCT 40 196/41/30/3312G24/011/ WND 26V02/ 8/501 51028 1 P.M. Weather: Broken stratocumulus Temperature: 46F, Dew point: 27F, Wind: WNW at 13G24 kts Sea-level pressure: 30.12 inches Hg, rising Visibility: 45 miles, distant light haze 6-hourly max. temp: 47F BHO SA 1755 E45 BKN 45 199/46/27/3013G24/012/ LGT DSNT HZ/ 8/500 50003 10047 20033 WEATHER SUMMARY FOR THURSDAY, NOVEMBER 5 TEMPERATURE (DEGREES F) MAX.....46 NORMAL.....53 MIN.....36 NORMAL.....37 MEAN....41 NORMAL.....45 DEPARTURE FROM 30-YEAR AVERAGE........... -4 TOTAL DEPARTURE FOR THE MONTH.............-3 [-0.8 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............24 DEPARTURE........+4 TOTAL HEATING UNITS FOR THE MONTH............98 DEPARTURE........+2 TOTAL HEATING UNITS FOR THE SEASON..........719 DEPARTURE.......+32 TOTAL HEATING UNITS LAST SEASON TO DATE.....629 DIFFERENCE......+90 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.............21 N AT 9:34 P.M. ASOS..................18 NNE AT 9:34 P.M. AEROVANE..............17 N AT 9:34 P.M. * DAVIS.................20 N AT 9:34 P.M. FASTEST MILE FOR YESTERDAY.............. 13 NNE AT 9:27 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE............14 NE AT 9:29 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE...........14 N AT 9:34 P.M. AVERAGE WIND SPEED AND DIRECTION........4.8 N ASOS.................5.0 DAVIS................4.9 N [002 DEG] * last of several occurrences PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.01 DEPARTURE....-0.14 ASOS..............0.01 TOTAL PRECIPITATION FOR MONTH ............0.06 DEPARTURE....-0.69 ASOS FOR MONTH..............0.04 TOTAL PRECIPITATION FOR THE YEAR..........45.17 DEPARTURE....+2.40 ASOS..................46.35 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE.....-0.1 TOTAL SNOWFALL FOR THE MONTH................0.0 DEPARTURE.....-0.2 TOTAL SNOWFALL FOR THE SEASON...............3.0 DEPARTURE.....+2.6 PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 2009 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane wind recording system gust when significant TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized 11/1 58/44/51/+4/0.05/.../.. 22 WNW 11/2 49/42/46/0/T/.../.. 29 NE 11/3 57/36/47/+1/0/.../.. 32 W AERO 32 MPH W 11/4 49/34/42/-4/0/.../.. 24 W 11/5 46/36/41/-4/0.01/.../.. 21 N 11/6 our morning low temp: 32F; the normal low is now 37F NEW DAILY RECORD FOR NOVEMBER 2009 None DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR NOVEMBER 6 HIGH 71 IN 1959 LOW 22 IN 1951 PRECIP 1.72 INCHES IN 1907 SNOWFALL 8.0 IN 1894 PEAK GUST 63 W IN 1973 RECORDS FOR NOVEMBER 7 HIGH 75 IN 1938 LOW 21 IN 1930 PRECIP 2.02 INCHES IN 1953 SNOWFALL 1.0 IN 1967 PEAK GUST 69e ENE IN 1953 TODAY'S REPORT PREPARED BY: Stephanie Radner