BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, NOVEMBER 19, 2012 ALL TIMES ARE IN EASTERN STANDARD TIME BAROMETRIC PRESSURE FALLING FROM HIGHEST READING SINCE MARCH 2011; LOW STRATOCUMULUS CLOUDS MOVING IN FROM NORTHEAST TODAY The barometric pressure corrected to sea level reached the highest reading which was in the low 30.70's yesterday morning. This was the highest since 30.78 inches in March 2011. After a mostly clear sky this morning low stratocumulus clouds were moving in from the northeast this afternoon. Today's observations: 7 A.M. Weather: Scattered dense cirrostratus, thin scattered cirrus 2 levels, hazy Temperature: 30F; Dew Point: 25F; Wind: N at 11 kts Sea-level pressure: 30.55 ins. Hg, falling then more slowly Visibility: 20 miles, hazy, inversion present 6-hour min. temp: 30F BHO SA 1155 220 SCT 250 –SCT 300 –SCT 20 344/30/25/0111/055/ SC DSNT NW-N AND SC/SC LYR NE-SE DNS CS LYR XTDNG ESE-SSW HAZY ALQDS INVSN PRSNT/ 8/508 56007 10035 20030 10 A.M. Weather: Scattered dense cirrus, thin broken cirrus, 2 levels, stratocumuls mostly distant all quadrants, hazy Temperature: 41F; Dew Point: 31F; Wind: N at 7 kts, Wind: Direction variable NNW-NNE Sea-level pressure: 30.51 ins. Hg, falling then more rapidly Visibility: 25 miles, hazy BHO SA 1455 220 SCT 250 –BKN 300 –BKN 25 333/41/31/0107/051/ SC DSNT ALQDS DNS CI S-SSW HAZY ALQDS WND 33V03/ 8/502 58011 1 P.M. Weather: Broken stratocumulus, broken cirrus, few lower cumulus, mostly clear sky distant WSW-NNW Temperature: 47F; Dew Point: 35F; Wind: NE at 7 kts, Wind: Direction variable N-E Sea-level pressure: 30.45 ins. Hg, falling then more rapidly Visibility: 35 miles, 45 miles WNW, distant haze 6-hour max. temp: 47F BHO SA 1755 E23 BKN 250 BKN 35 310/47/35/0507/045/ FEW LWR CU MSTLY CLR SKY DSNT WSW-NNW VSBY WNW 45 DSNT HZ ALQDS/ 8/801 56023 10047 20030 WEATHER SUMMARY FOR SUNDAY, NOVEMBER 18 TEMPERATURE (DEGREES F) MAX.....46 NORMAL.....49 MIN.....30 NORMAL.....33 MEAN....38 NORMAL.....41 DEPARTURE FROM 30-YEAR NORMAL.....................-3 TOTAL DEPARTURE FOR THE MONTH....................-27 [-1.7 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............27 DEPARTURE........+3 TOTAL HEATING UNITS FOR THE MONTH...........410 DEPARTURE.......+27 TOTAL HEATING UNITS FOR THE SEASON..........818 DEPARTURE......-128 TOTAL HEATING UNITS LAST SEASON TO DATE.....708 DIFFERENCE.....+110 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY..............22 ENE AT 11:43 A.M. AERO...................21 ENE AT 11:43 A.M. ASOS...................21 NNE AT 11:56 A.M. DAVIS..................19 ENE AT 11:42 A.M. RMY 20 THE FASTEST MILE FOR YESTERDAY............13 ENE AT 11:45 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE.............15 ENE AT 11:44 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE............14 NE AT 11:44 A.M. AVERAGE WIND SPEED AND DIRECTION.........8.7 N ASOS..................8.9 DAVIS.................8.2 NNE [030 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..........-1.34 ASOS..............1.52 TOTAL PRECIPITATION FOR THE YEAR..........34.69 DEPARTURE.........-11.91 ASOS.............34.70 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M.........0.0 DEPARTURE..........-0.1 TOTAL SNOWFALL FOR THE MONTH...............4.0 DEPARTURE..........+3.2 TOTAL SNOWFALL FOR THE SEASON..............4.0 DEPARTURE..........+2.9 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/-2/0.00/587/96 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 39/32/36/-6/0.00/0.0/082/14 23 N AERO 21 MPH N RMY 25 11/16 45/31/38/-4/0.00/0.0/216/37 18 NNW AERO 17 MPH NNW RMY 19 11/17 47/32/40/-1/0/00/0/0/553/95 20 N AERO 20 MPH N RMY N/A 11/18 46/30/38/-3/0.00/0.0/487/84 22 ENE AERO 21 MPH ENE RMY 20 11/19 morning low temp: 30F; the normal low is now 33F 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 19 HIGH 72 IN 1941 LOW 10 IN 1936 PRECIP 1.92 INCHES IN 1926 SNOWFALL 11.0 INS IN 1986 PEAK GUST 59e E IN 1945 RECORDS FOR NOVEMBER 20 HIGH 72 IN 1953 LOW 10 IN 1894 PRECIP 2.78 INS IN 1988 SNOWFALL 3.0 INS IN 1897 PEAK GUST 73e S IN 1950 TODAY'S REPORT PREPARED BY: Robert Skilling/Patrick Peters