BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, NOVEMBER 5, 2009 ALL DATA IN EASTERN STANDARD TIME Today's observations: 7 A.M. Weather: Overcast altostratus, few stratocumulus N, bright sky distant N, break in overcast distant E-SE Temperature: 40F, Dew point: 30F, Wind: ESE at 5 kts Sea-level pressure: 30.19 inches Hg, falling Visibility: 50 miles 6-hour minimum temp: 39F 24-hourly precipitation: 0.00 BHO SA 1155 E65 OVC 50 223/40/30/1205/019/ FEW SC N BRGHT SKY DSNT N BRK INOVC ALG HRZN DSNT E-SE/ 8/52/ 58010 10041 20039 10 A.M. Weather: Scattered cumulus, overcast stratocumulus, few stratocumulus lenticularis north, breaks in overcast Temperature: 44F, Dew point: 31F, Wind: NE at 5 kts Sea-level pressure: 30.16 inches Hg, falling Visibility: 30 miles BHO SA 1455 40 SCT E60 OVC 30 212/44/31/0505/016/ FEW SCSL N BRKS INOVC OVHD VSBY SE-SW 50/ 8/8// 58011 1 P.M. Weather: Scattered cumulus, overcast stratocumulus Temperature: 45F, Dew point: 34F, Wind: NNE at 5 kts, Wind: Light and variable Sea-level pressure: 30.09 inches Hg, falling Visibility: 35 miles 6-hourly max. temp: 46F BHO SA 1755 35 SCT E55 OVC 35 191/45/34/0305/009/ WND LGT AND VRB RB45E50/ 8/8// 58021 MANUAL 6000/ 10046 20040 WEATHER SUMMARY FOR WEDNESDAY, NOVEMBER 4 TEMPERATURE (DEGREES F) MAX.....49 NORMAL.....54 MIN.....34 NORMAL.....38 MEAN....42 NORMAL.....46 DEPARTURE FROM 30-YEAR AVERAGE........... -4 TOTAL DEPARTURE FOR THE MONTH.............+1 [+0.1 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............23 DEPARTURE........+4 TOTAL HEATING UNITS FOR THE MONTH............74 DEPARTURE........-2 TOTAL HEATING UNITS FOR THE SEASON..........695 DEPARTURE.......+28 TOTAL HEATING UNITS LAST SEASON TO DATE.....629 DIFFERENCE......+66 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.............24 W AT 12:58 A.M. ASOS..................23 WNW AT 12:58 A.M. AEROVANE..............23 W AT 12:58 A.M. * DAVIS.................24 W AT 12:35 A.M. FASTEST MILE FOR YESTERDAY.............. 18 W AT 12:44 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE............17 NW AT 8:56 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE...........19 WNW AT 8:56 A.M. AVERAGE WIND SPEED AND DIRECTION........8.8 W ASOS.................8.4 DAVIS................8.9 W [270 DEG] * last of several occurrences PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE....-0.15 ASOS..............0.00 TOTAL PRECIPITATION FOR MONTH ............0.05 DEPARTURE....-0.55 ASOS FOR MONTH..............0.03 TOTAL PRECIPITATION FOR THE YEAR..........45.16 DEPARTURE....+2.54 ASOS..................46.34 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.....-0.1 TOTAL SNOWFALL FOR THE SEASON...............3.0 DEPARTURE.....+2.7 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 our morning low temp: 39F; 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 5 HIGH 76 IN 1994 LOW 18 IN 1908 PRECIP 4.26 INCHES IN 1955 SNOWFALL 1.5 IN 1892 PEAK GUST 69 W IN 2004 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 TODAY'S REPORT PREPARED BY: Stephanie Radner