BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, DECEMBER 5, 2016   LIGHT SNOW TURNS TO LIGHT DRIZZLE BY 1:00PM Light snow began to fall on the summit after 6:00AM leaving just a trace before the 7:00AM observation.  Warming temperatures turned the snow into light rain and drizzle after 10:00AM.  The six-hour precip. total was 0.13 in. with 0.4 in. of snowfall by 1:00PM. Temperatures warmed to a max. of 35F from a low at midnight of 27F. Winds were light today and had shifted S-SW by early afternoon. Thick fog enveloped the summit granting just 1/16-1/8 mile of visibility during the last two observations. PRELIMINARY STATS FOR NOVEMBER 2016 TEMPERATURE, Deg. F Avg. Max. 52.8 [+2.8] Avg. Min. 36.3 [+2.8] Mean      44.6 [+2.9] 24-hour corrected mean: 44.0 Max. for month: 69F on 2nd Min. for month: 28F on 21st, 22nd, 23rd, 28th   HEATING DEGREE DAYS Total heating units: 609 [-89]  Total for the season: 1030 [-231] Total for last season: 1002   PRECIPITATION, Inches Total: 2.61 [-2.15] Greatest in 24 hrs: 1.27 in. on 15th-16th   WIND, mph Avg. uncorrected wind speed: 11.4 Avg. corrected wind speed: 11.9 Prevailing wind direction: NW at 17% Peak gust and direction: 45 ESE on 29th   SUNSHINE: Campbell-Stokes card minutes: 9012 mins. of possible 17010 mins. or 53% Astronomical total minutes: 9315 mins. of possible 17593 mins. or 53% 7 A.M. Weather: Light snow, overcast stratus Temperature: 31F; Dew Point: 28F; Wind: SE at 6 kts, Wind Speed: Light Sea-level pressure: 30.05 ins. Hg, falling, then more quickly Visibility: 3 miles 6-hr Max temp: 31F 6-hr Min temp: 28F 24-hr precip: Trace 24-hr snowfall: Trace BHO SA 1155 32 OVC 3S- 176/31/28/1306/005/ WND LGT/ 8/7// 58018 10031 20028 10 A.M. Weather: Light snow, fog Temperature: 32F; Dew Point: 31F; Wind: ESE at 9 kts Sea-level pressure: 30.01 ins. Hg, falling, then more quickly Visibility: 1/8 mile 3-hr precip: 0.03 in. BHO SA 1455 W1 X 1/8S-F 163/32/31/1209/001/ 8//// 58013 MANUAL 6003/ ASOS 60006 1 P.M. Weather: Light drizzle, thick fog Temperature: 33F; Dew Point: 33F; Wind: SSW at 5 kts, Wind: Light and variable Sea-level pressure: 29.93 ins. Hg, falling, then less quickly Visibility: 1/16 mile 6-hr Max temp: 35F 6-hr Min temp: 30F 6-hr precip: 0.13 in. 6-hr snowfall: 0.4 in. BHO SA 1755 W2 X 1/16L-F 134/33/33/2005/993/ WND L/V/ 8//// 56029 MANUAL 6013/ ASOS 60016 10035 20030 SUMMARY FOR SUNDAY, DECEMBER 4, 2016   TEMPERATURE (DEGREES F) MAX.....39   NORMAL.....43 MIN.....27   NORMAL.....28 MEAN....33   NORMAL.....35 DEPARTURE FROM 30-YEAR NORMAL........................-2 TOTAL DEPARTURE FOR THE MONTH.......................+15 [+3.6 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............32   DEPARTURE..........+2 TOTAL HEATING UNITS FOR THE MONTH.............101   DEPARTURE.........-15 TOTAL HEATING UNITS FOR THE SEASON...........1131   DEPARTURE........-247 TOTAL HEATING UNITS LAST SEASON TO DATE......1096   DIFFERENCE........+35 PEAK GUST AND AVERAGE WIND SPEED (MPH)  PEAK WIND GUST FOR YESTERDAY...................25 NW  AT 12:27 A.M.                    ASOS........................27 NW  AT 12:27 A.M.                    DAVIS.......................25 NW  AT 12:29 A.M. RMY N/A FASTEST MILE FOR YESTERDAY.....................18 NW  AT 12:27 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE..................18 NW  AT 12:29 A.M.  MAXIMUM 2-MINUTE DAVIS AVERAGE.................17 WNW AT 12:28 A.M. AVERAGE WIND SPEED AND DIRECTION..............9.5 WNW                    ASOS.......................9.8                    DAVIS......................8.6 WNW [300 Deg.] *last of multiple 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..........0.20  DEPARTURE......-0.45                          ASOS..............0.21 TOTAL PRECIPITATION FOR THE YEAR..........37.17  DEPARTURE.....-12.01                          ASOS.............37.64 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M........Trace  DEPARTURE.......-0.3 TOTAL SNOWFALL FOR THE MONTH..............Trace  DEPARTURE.......-1.1 TOTAL SNOWFALL FOR THE SEASON.............Trace  DEPARTURE.......-3.7 PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER CALENDAR DAY DATA DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/PEAK GUST/AERO/RMY GUST AERO: Aerovane wind recording system gust RMY:  R.M. Young wind gust recording system TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized M:    Missing data 11/1  55/29/42/-4/0.00/0.0/600/97           22 SSE AERO 22 S   RMY N/A 11/2  69/45/57/+11/0.00/0.0/425/69          24 SSW AERO 24 S   RMY 26 11/3  65/49/57/+11/0.01/0.0/025/04          38 W   AERO 41 W   RMY 38 11/4  56/35/46/+1/0.00/0.0/587/96           26 NW  AERO 26 NW  RMY 30 11/5  55/32/44/-1/0.00/0.0/250/41           24 W   AERO 23 W   RMY 24 11/6  49/39/44/-1/0.04/T/091/15             23 N   AERO 23 N   RMY 23 11/7  46/33/40/-5/0.00/0.0/423/70           21 N   AERO 21 N   RMY 20 11/8  64/36/50/+6/0.00/0.0/590/98           17 W   AERO 15 SSW RMY N/A 11/9  60/43/52/+8/T/0.0/090/15              22 NNW AERO 22 NW  RMY N/A 11/10 52/34/43/-1/0.00/0.0/507/85           28 SSW AERO 30 SSW RMY 31 11/11 59/35/47/+4/0.00/0.0/565/95           39 NW  AERO 44 NW  RMY 45 11/12 47/31/39/-4/0.00/0.0/569/96           38 NW  AERO 44 NW  RMY 23     11/13 59/37/48/+5/0.00/0.0/519/88           23 W   AERO 22 W   RMY N/A 11/14 66/44/55/+13/0.00/0.0/547/93          24 WSW AERO 22 WSW RMY 25 11/15 57/46/52/+10/1.23/0.0/000/00          32 ENE AERO 33 ENE RMY 35 11/16 57/45/51/+9/0.04/0.0/000/00           26 W   AERO 25 W   RMY 28 11/17 55/41/48/+7/0.00/0.0/169/29           25 WNW AERO 29 NW  RMY 29 11/18 60/38/49/+8/0.00/0.0/580/100          21 NNE AERO 22 N   RMY 23 11/19 53/40/47/+6/0.02/0.0/445/77           18 ENE AERO 18 ENE RMY N/A 11/20 46/29/38/-2/0.04/0.0/006/01           37 SW* AERO 40 SW  RMY N/A 11/21 36/28/32/-8/T/T/138/24                40 W   AERO 44 W   RMY 44 11/22 41/28/35/-5/0.00/0.0/555/97           35 W   AERO 37 W   RMY 36 11/23 43/28/36/-3/0.00/0.0/542/95           32 WNW AERO 33 WNW RMY N/A 11/24 41/29/35/-4/0.05/T/000/00             15 NNE AERO 13 NNE RMY N/A 11/25 46/38/42/+3/0.08/0.0/000/00           24 SE  AERO 23 SE  RMY 25 11/26 45/36/41/+3/0.00/0.0/085/15           18 NW  AERO 17 NW  RMY 28 11/27 44/30/37/-1/0.00/0.0/451/80           26 W   AERO 26 WNW RMY 29 11/28 44/28/36/-2/0.00/0.0/556/99           22 WNW AERO 21 WNW RMY 22 11/29 57/37/47/+10/0.46/0.0/000/00          45 ESE AERO 47 SSE*RMY 47 11/30 57/45/51/+14/0.64/0.0/000/00          32 ENE AERO 33 E   RMY 31 PRELIMINARY CLIMATE SUMMARY FOR DECEMBER CALENDAR DAY DATA DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/PEAK GUST/AERO/RMY GUST AERO: Aerovane wind recording system gust RMY:  R.M. Young wind gust recording system TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized M:    Missing data 12/1  55/39/47/+10/0.20/0.0/000/00          36 W   AERO 37 W   RMY 36 12/2  48/34/41/+5/0.00/0.0/.../..           32 W   AERO 32 W   RMY N/A 13/3  44/31/38/+2/0.00/0.0/.../..           37 WNW AERO 39 WNW RMY 40 12/4  39/27/33/-2/0.00/0.0/.../..           25 NW  AERO 25 NW  RMY N/A 12/5  Low temp since midnight is 27F; normal low is now 27F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR DECEMBER 5 HIGH 65 IN 2001 LOW -1 IN 1926 PRECIP 2.86 INS. IN 1993 SNOWFALL 7.0 INS. IN 1926, 1981 PEAK GUST 67 MPH WNW IN 1961, S IN 1973 RECORDS FOR DECEMBER 6 HIGH 70 IN 2001 LOW 5 IN 1901,1935 PRECIP 2.78 INS. IN 2003 SNOWFALL 17.0 INS. IN 2003 PEAK GUST 74 MPH NW IN 1981 TODAY'S REPORT PREPARED BY: Cecilia Borries-Strigle