BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, NOVEMBER 15, 2012 ALL TIMES ARE IN EASTERN STANDARD TIME OVERCAST OF STRATOCUMULUS CLOUDS SHOWS ONLY SLOW SIGNS OF CLEARING, EDGE OF LAYER SW-N ALL MORNING APPROACHING WITHIN 10 MILES BY EARLY THIS AFTERNOON There has been no sunshine today through early this afternoon as a stubborn layer of stratocumulus clouds has persisted here while we can see the clearing with the sun out to our SW through N. The clearing line was gradually edging closer early this afternoon. Temperatures, after reaching a low of 32F early today, have only risen as high as 38F by early afternoon. Today's normal maximum temperature is 50 degrees. Today's observations: 7 A.M. Weather: Overcast statocumulus clouds, break in overcast in clear sky band extending from distant WSW-NW-NNE Temperature: 32F; Dew Point: 27F; Wind: NNW at 10 kts, Wind: Direction variable WNW-N Sea-level pressure: 30.43 ins. Hg, rising slightly Visibility: 50 miles, except 35 miles NE, 25 miles SE and 80 miles NW, light distant haze NE-SE 6-hour min. temp: 32F BHO SA 1155 E18 OVC 50 306/32/27/3410/043/ BINOVC/CLR SKY BND DSNT ALG HRZN WSW-NW-NNE VSBY NE 35 SE 25 DSNT HZ NW 80 WND 31V01/ 8/5// 53003 10034 20032 10 A.M. Weather: Overcast stratocumulus, break in overcast in clear sky band extending from distatn WSW-NW-NNE Temperature: 36F; Dew Point: 28F; Wind: N at 7 kts, Sea-level pressure: 30.43 ins. Hg, falling slightly Visibility: 50 miles, except NE 40 miles, SE 25 miles, NW 75 miles, light distant haze, and hazy NE-SE BHO SA 1455 E17 OVC 50 304/36/28/3507/043/ BINOVC/CLR SKY BND DSNT WSW-NW-NNE VSBY NE 40 SE 25 DSNT HZ NW 75 LGT DSNT HZ/ 8/5// 58002 1 P.M. Weather: Overvast stratocumulus, line of clearing 10 miles SW-NW moving east, higher cirrus clouds visible distant SW-NW Temperature: 37F; Dew Point: 30F; Wind: N at 9 kts, Wind: Direction variable NW-NE Sea-level pressure: 30.38 ins. Hg, falling then more slowly Visibility: 50 miles, except 40 miles NE and 30 miles SE-S, 70 miles NW, distant haze all quadrants 6-hour max. temp: 38F 6-hour min. temp: 32F BHO SA 1755 E16 OVC 50 287/37/30/3609/038/ BINOVC/LINE OF CLRG 10 MI SW-N MOVG E HIER CI CLDS VSB DSNT SW-NW WND 32V05/ VSBY NE 40 SE-S 30 DSNT HZ NW 70 LGT DSNT HZ/501 56017 10038 20032 WEATHER SUMMARY FOR WEDNESDAY, NOVEMBER 14 TEMPERATURE (DEGREES F) MAX.....44 NORMAL.....51 MIN.....33 NORMAL.....34 MEAN....39 NORMAL.....42 DEPARTURE FROM 30-YEAR NORMAL.....................-3 TOTAL DEPARTURE FOR THE MONTH....................-13 [-1.1 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............26 DEPARTURE........+3 TOTAL HEATING UNITS FOR THE MONTH...........302 DEPARTURE.......+13 TOTAL HEATING UNITS FOR THE SEASON..........710 DEPARTURE......-142 TOTAL HEATING UNITS LAST SEASON TO DATE.....645 DIFFERENCE......+65 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY..............27 NNE AT 12:05 P.M. AERO...................23 N AT 9:57 A.M. ASOS...................24 NNE AT 12:06 P.M. DAVIS..................23 NNE AT 8:43 A.M. RMY 24 THE FASTEST MILE FOR YESTERDAY............15 NNE AT 12:07 P.M. * MAXIMUM 2-MINUTE ASOS AVERAGE.............16 NNE AT 12:07 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE............15 NNE AT 11:13 A.M. AVERAGE WIND SPEED AND DIRECTION........10.5 N ASOS.................10.7 DAVIS.................9.6 NNE [013 deg] * last of several occurrences... PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE..........-0.16 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........1.49 DEPARTURE..........-0.71 ASOS..............1.52 TOTAL PRECIPITATION FOR THE YEAR..........34.69 DEPARTURE.........-11.28 ASOS.............34.70 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M.........0.0 DEPARTURE...........0.0 TOTAL SNOWFALL FOR THE MONTH...............4.0 DEPARTURE..........+3.5 TOTAL SNOWFALL FOR THE SEASON..............4.0 DEPARTURE..........+3.2 PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 2012 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane wind recording system gust RMY: 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 56/42/49/+3/0.00/371/60 28 SW AERO 28 MPH SW RMY 27 11/2 51/41/46/0/0.02/000/00 24 WNW AERO 22 MPH WNW RMY 22 11/3 52/37/45/-1/0.00/319/52 29 NW AERO N/A RMY 28 11/4 52/34/43/-2/0.00/570/96 27 NW AERO 25 MPH NW RMY 26 11/5 45/28/37/-8/0.00/292/48 25 NW AERO 25 MPH NW RMY 25 11/6 40/25/33/-12/0.00/600/99 22 ENE AERO 20 MPH ENE RMY N/A 11/7 42/29/36/-9/0.78/3.5/000/00 48 NNE AERO 52 MPH NNE RMY 51 11/8 36/29/33/-11/0.26/0.5/000/00 43 N AERO 50 MPH N RMY 44 11/9 51/34/43/-1/0.00/0.0/569/95 33 NW AERO 35 MPH NW RMY 32 11/10 53/36/45/+1/0.00/0.0/561/94 25 W AERO 23 MPH W RMY 23 11/11 62/40/51/+8/0.00/0.0/357/60 28 SSW AERO 27 MPH SSW RMY 28 11/12 66/50/58/+15/0.00/0.0/385/65 33 SSW AERO 33 MPH S RMY N/A 11/13 63/37/50/+7/0.43/0.0/000/00 45 S AERO 45 MPH S RMY N/A 11/14 44/33/39/-3/0.00/0.0/559/95 27 NNE AERO 23 MPH N RMY 24 11/15 morning low temp: 32F; the normal low is now 34F DAILY RECORDS FOR NOVEMBER 2012 11/7 - NEW DAILY RECORD MAXIMUM SNOWFALL OF 3.5 INCHES; surpasses the previous record of 1.0 inch in 1967 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR NOVEMBER 15 HIGH 74 IN 1993 LOW 15 IN 1933 PRECIP 1.66 INCHES IN 1981 SNOWFALL 4.0 IN 1967 PEAK GUST 65 SSE IN 2008 RECORDS FOR NOVEMBER 16 HIGH 73 IN 1927 LOW 8 IN 1933 PRECIP 2.25 INCHES IN 1981 SNOWFALL 2.0 IN 1913 PEAK GUST 78 S IN 1989 TODAY'S REPORT PREPARED BY: Robert Skilling If you do not wish to receive this Daily Discussion and Climate Summary from the Blue Hill Observatory, please send an email to sitemaster@bluehill.org.