BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, DECEMBER 1, 2012 ALL TIMES ARE IN EASTERN STANDARD TIME STEADY LIGHT SNOW AMOUNTS TO 0.8 THROUGH 1 PM... NOVEMBER ENDS COLDER AND DRIER THAN AVERAGE... A stationary front that will move through New England as a warm front later today is generating light snow over much of the area. Snow began shortly after sunrise at 6:45 AM, and this has continued as steady snow into early afternoon. A total snowfall of 0.8 was measured on the snowboards at 1 PM, with a liquid water equivalent of 0.05 inch in that time. November ended on a chilly note and the cold month breaks the stretch of 21 consecutive months to be warmer than the long-term 120-year average that continued from February 2011 through October 2012. NOVEMBER 2012 SUMMARY Temp max: 47.0 deg F [-3.0] Temp min: 33.0 deg F [-0.5] Temp mean (NWS): 40.0 deg F [-1.7] Temp mean (corrected): 39.2 deg F [-1.4] Precipitation: 1.68 inches [-3.08] Snowfall: 6.0 inches [+3.7] Wind speed: 12.3 mph Prevailing direction: N More November stats will be available in the next few days. Despite a colder than average November, the year to date for the first eleven months remains the warmest on record. Warmest Jan-Nov, deg F (1885-2012) 1) 53.1 in 2012 2) 53.0 in 2010 3) 52.4 in 1999 4) 52.0 in 1991 52.0 in 1998 Today's observations: 7 A.M. Weather: Overcast stratocumulus and nimbostratus, light snow, snow began 6:45 AM Temperature: 28F; Dew Point: 19F; Wind: N at 9 kts Sea-level pressure: 30.60 ins. Hg, rising Visibility: 6 miles, visibility decreasing 24-hour precipitation: Trace 24-hour snowfall: Trace Snow on ground: Trace 6-hour max. temp: 30F 6-hour min. temp: 28F Snow on ground: Trace BHO SA 1155 E30 OVC 6S- 363/28/19/3509/060/ VSBY DCRSNG SB45/ 8/72/ 53017 6000/ 10030 20028 10 A.M. Weather: Overcast stratocumulus and nimbostratus, light snow Temperature: 27F; Dew Point: 25F; Wind: N at 6 kts, Wind: Light Sea-level pressure: 30.63 ins. Hg, rising Visibility: 7 miles 3-hour precipitation: 0.03 inch 3-hour snowfall: 0.4 inch BHO SA 1455 E40 OVC 7S- 373/27/25/3406/063/ WND LGT TOTAL NEW SNW PST 3 HRS 0.4 IN/ 8/72/ 53010 6003/ 1 P.M. Weather: Broken stratocumulus, overcast nimbostratus, light snow Temperature: 28F; Dew Point: 27F; Wind: NNW at 6 kts, Wind: Light Sea-level pressure: 30.57 ins. Hg, falling Visibility: 2 miles, visibility variable 1 to 3 miles 6-hour precipitation: 0.05 inch 6-hour snowfall: 0.8 inch Snow on ground: 1 inch 6-hour max. temp: 28F 6-hour min. temp: 25F BHO SA 1755 E7 BKN 35 OVC 2VS- 352/28/27/3406/057/ VSBY 1V3 WND LGT TOTAL NEW SNW PST 6 HRS 0.8 IN/ 8/72/ 4/001 56021 6005/ 10028 20025 WEATHER SUMMARY FOR FRIDAY, NOVEMBER 30 TEMPERATURE (DEGREES F) MAX.....35 NORMAL.....45 MIN.....29 NORMAL.....29 MEAN....32 NORMAL.....37 DEPARTURE FROM 30-YEAR NORMAL.....................-5 TOTAL DEPARTURE FOR THE MONTH....................-45 [-1.7 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............33 DEPARTURE........+5 TOTAL HEATING UNITS FOR THE MONTH...........742 DEPARTURE.......+44 TOTAL HEATING UNITS FOR THE SEASON.........1150 DEPARTURE......-111 TOTAL HEATING UNITS LAST SEASON TO DATE.....907 DIFFERENCE.....+243 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY..............21 SW AT 12:43 A.M. * AERO...................24 SW AT 12:43 A.M. ASOS...................25 SW AT 12:44 A.M. DAVIS..................24 SW AT 12:43 A.M. RMY 24 THE FASTEST MILE FOR YESTERDAY............18 SW AT 12:35 A.M. * MAXIMUM 2-MINUTE ASOS AVERAGE.............18 N AT 7:50 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE............18 N AT 7:50 A.M. AVERAGE WIND SPEED AND DIRECTION.........8.5 N ASOS..................7.2 DAVIS.................7.0 N [358 deg] * last of several occurrences PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M...Trace DEPARTURE..........-0.16 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........1.68 DEPARTURE..........-3.08 ASOS..............1.71 TOTAL PRECIPITATION FOR THE YEAR..........34.88 DEPARTURE.........-13.65 ASOS.............34.89 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M.......Trace DEPARTURE..........-0.2 TOTAL SNOWFALL FOR THE MONTH...............6.0 DEPARTURE..........+3.7 TOTAL SNOWFALL FOR THE SEASON..............6.0 DEPARTURE..........+3.4 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 47/30/39/-2/0.00/0.0/451/78 20 NNE AERO 16 MPH NNE RMY N/A 11/20 48/32/40/0/0.00/0.0/415/72 18 ENE AERO 15 MPH ENE RMY 17 11/21 49/35/42/+2/0.00/0.0/184/32 21 NE AERO 17 MPH ENE RMY 18 11/22 52/37/45/+5/0.00/0.0/549/96 16 S AERO 16 MPH SSE RMY 15 11/23 52/37/45/+6/0.00/0.0/200/35 26 S AERO 24 MPH S RMY N/A 11/24 44/30/37/-2/T/0.0/364/64 42 W AERO 39 MPH W RMY 41 11/25 38/27/33/-6/0.00/0.0/323/57 40 W AERO 38 MPH W RMY 39 11/26 44/29/37/-1/0.00/0.0/526/93 37 W AERO 37 MPH W RMY 37 11/27 35/31/33/-5/0.19/2.0/000/00 18 WNW AERO 15 MPH WNW RMY N/A 11/28 34/27/31/-7/T/T/000/00 23 NNE AERO 22 MPH NNE RMY 23 11/29 41/27/34/-3/0.00/0.0/.../.. 28 SW AERO 31 MPH SW RMY 33 11/30 35/29/32/-5/0.00/0.0/.../.. 21 SW AERO 24 MPH SW RMY 24 12/1 morning low temp: 25F; the normal low is now 29F 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 DECEMBER 1 HIGH 70 IN 2001 LOW 3 IN 1887 PRECIP 1.46 INS. IN 1917 SNOW 2.0 INS. IN 1902 PEAK GUST 72 MPH NW IN 1964 RECORDS FOR DECEMBER 2 HIGH 61 IN 1998 LOW 3 IN 1890 PRECIP 2.09 INS. IN 1974 SNOWFALL 5.0 INS. IN 1894, 1929 PEAK GUST 89e MPH SSE IN 1942 TODAY'S REPORT PREPARED BY: Mike Iacono/Peter Volpe