BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, NOVEMBER 17, 2011 ALL TIMES ARE IN EASTERN STANDARD TIME NOVEMBER REACHES 6 DEGREES WARMER THAN NORMAL COLDER AIR ARRIVES TODAY--TEMPS. FALL THROUGH 40'S RAINFALL TOTAL REACHES 0.87 INCH The first 16 days of the month reached a departure of plus 6.0 degrees after 7 days with double-digit departures in temperature ending with a +13 yesterday. Seasonably colder air was arriving today with the temperature falling from a high of 53F at midnight to the lower 40's by mid-afternoon. Rain was light to moderate and briefly yesterday afternoon and evening ending as just some light rain in the early hours of today with a total of 0.87 inch. Today's observations: 7 A.M. Weather: Broken nimbostratus/altostratus, overcast altocumulus, small breaks in overcast S-WNW, few stratus fractus dissipated E past hour Temperature: 47F, Dew point: 45F; Wind: NW at 7 kts Sea-level pressure: 29.78 inches Hg, rising Visibility: 30 miles, haze and some thin fog, except visibility NE 40 miles 24-hour precip: 0.87 inch 6-hour min. temp: 47F BHO SA 1155 E80 BKN 110 OVC 30 084/47/45/3107/978/ FEW STFRA DSSPTD PST HR E SML BINOVC S-WNW THN F HAZY XCPT VSBY NE 40/ 8/07/ 51017 ASOS 60003 MANUAL 6003/ ASOS 70084 MANUAL 70087 10053 20047 10 A.M. Weather: Overcast nimbostratus/altostratus/virga Temperature: 45F, Dew Point: 36F; Wind: NW at 13 kts, Wind: Gust to 23 kts past hour, Wind: Direction variable WNW to N Sea-level pressure: 29.79 inches Hg, falling Visibility: 55 miles, except 70 miles NW, BHO SA 1455 E90 OVC 55 089/45/36/3213/979/ FEW SC DSNT NNW-E HIER AC VSB DSNT ENE-ESE VIRGA ALQDS VSBY NW 70 WND GST 23 KTS PST HR WND 30V36/ 8/52/ 53005 1 P.M. Weather: Overcast nimbostratus/altostratus/virga Temperature: 44F, Dew Point: 35F; Wind: N at 6 kts, Wind: Light Sea-level pressure: 29.75 inches Hg, falling Visibility: 70 miles, except 85 miles NW 6-hour max. temp: 48F BHO SA 1755 E90 OVC 70 076/44/35/3506/975/ HIER AC CLDS DSNT NE BRGHT SKY ALG HRZN DSNT W-N VIRGA ALQDS VSBY NW 85 WND LGT/ 8/02/ 58013 10048 20043 WEATHER SUMMARY FOR WEDNESDAY, NOVEMBER 16 TEMPERATURE (DEGREES F) MAX.....58 NORMAL.....49 MIN.....52 NORMAL.....34 MEAN....55 NORMAL.....42 DEPARTURE FROM 30-YEAR NORMAL....................+13 TOTAL DEPARTURE FOR THE MONTH....................+99 [+6.0 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY.............10 DEPARTURE........-13 TOTAL HEATING UNITS FOR THE MONTH............233 DEPARTURE.......-101 TOTAL HEATING UNITS FOR THE SEASON...........659 DEPARTURE.......-266 TOTAL HEATING UNITS LAST SEASON TO DATE......811 DIFFERENCE......-152 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY..............18 S AT 12:38 P.M. AERO...................21 S AT 12:38 P.M. ASOS...................21 S AT 12:38 P.M. DAVIS..................20 S AT 12:37 P.M. THE FASTEST MILE FOR YESTERDAY............13 S AT 12:55 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE.............14 S AT 12:56 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE............14 S AT 12:54 P.M. AVERAGE WIND SPEED AND DIRECTION........ 6.4 S ASOS..................6.5 DAVIS.................6.2 S [180 deg] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.87 DEPARTURE..........+0.71 ASOS..............0.84 TOTAL PRECIPITATION FOR THE MONTH ........1.99 DEPARTURE..........-0.49 ASOS..............1.95 TOTAL PRECIPITATION FOR THE YEAR..........56.01 DEPARTURE.........+11.51 ASOS..............56.40** **ASOS data is in error due to system failure on 1/12-13/11 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.........-1.3 TOTAL SNOWFALL FOR THE SEASON...............8.5 DEPARTURE.........+7.0 PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 2011 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane wind recording system gust when significant RMY: R.M. Young wind gust recording system added 8/9/2011 TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized 11/1 50/38/44/-3/0.00/0.0/286/46 25 ENE AERO 24 MPH ENE RMY 24 11/2 54/34/44/-2/0.00/0.0/619/100 17 S AERO 16 MPH S RMY N/A 11/3 60/40/50/+4/0.00/0.0/437/71 27 WSW AERO 30 MPH WSW RMY 28 11/4 49/33/41/-5/0.00/0.0/343/56 33 NW AERO 35 MPH NNW RMY 36 11/5 47/29/38/-7/0.00/0.0/556/91 18 NW AERO 21 MPH NNW RMY 21 11/6 56/35/46/+1/0.00/0.0/603/99 24 SSW AERO 24 MPH SSW RMY 26 11/7 62/39/51/+6/0.00/0.0/600/99 23 WSW AERO 24 MPH SW RMY 25 11/8 68/49/59/+15/0.00/0.0/580/96 20 W AERO 21 MPH W RMY N/A 11/9 68/50/59/+15/0.00/0.0/584/97 22 S AERO 23 MPH S RMY 23 11/10 60/53/57/+13/1.12/0.0/000/00 22 WNW AERO 22 MPH WNW RMY N/A 11/11 55/37/46/+3/T/0.0/358/60 41 W AERO 44 MPH W RMY 45 11/12 52/34/43/0/0.00/0.0/524/88 35 SSW AERO 38 MPH SSW RMY 38 11/13 62/43/53/+10/0.00/0.0/243/41 36 S AERO 37 MPH S RMY 38 11/14 67/52/60/+18/T/0.0/372/63 33 SSW AERO 35 MPH SSW RMY N/A 11/15 66/55/61/+19/T/0.0/053/09 37 SSW AERO 38 MPH SSW RMY 38 11/16 58/52/55/+13/0.84/0.0/000/00 18 S AERO 21 MPH S RMY 21 11/17 our morning low temp: 47F; the normal low is now 34F DAILY RECORDS FOR NOVEMBER 2011 None so far... DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR NOVEMBER 17 HIGH 74 IN 1928 LOW 10 IN 1924 PRECIP 1.92 INCHES IN 1920 SNOWFALL 1.0 INS IN 1980 PEAK GUST 61 SSE IN 2006 RECORDS FOR NOVEMBER 18 HIGH 72 IN 1963 LOW 10 IN 1936 PRECIP 1.80 INS IN 1929 SNOWFALL 6.3 INS IN 1980 PEAK GUST 60 SW IN 1987 TODAY'S REPORT PREPARED BY: Robert Skilling