BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, DECEMBER 2, 2012
ALL TIMES ARE IN EASTERN STANDARD TIME
 
SNOW TOTAL OF 0.8 INCH YESTERDAY
WARM FRONT PASSES THROUGH TODAY PROVIDING SLIGHT WARMUP
PERSISTENT FOG ENTIRE DAY; CLEARING EARLY AFTERNOON
 
Fog has blanketed the summit for the entire day until early this
afternoon, however there is still fog below the summit. A noticeable
warm front is currently sweeping through, resulting in winds to shift
from easterly to southerly. Temperatures have responded to this well,
as they are currently in the mid to upper 40's, after starting in the
low to mid 30's earlier.
 
As dry as this year has been, January-November precipitation deficit
still does not rank in the top 10 for driest on record. It currently
ranks 14th, behind 1939's record of 34.76.
 
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: Sky obscured in dense fog
Temperature: 39F; Dew Point: 38F; Wind: ESE at 8 kts
Sea-level pressure: 30.38 ins. Hg, decreasing        
Visibility: 1/16 mile, dense fog
24-hour precipitation: 0.06 inch
24-hour snowfall: 0.8 inch
Snow on ground: None
6-hour max. temp: 39F
6-hour min. temp: 32F
BHO SA 1155 W7 X 1/16F 289/39/38/1108/038/ DNS FG ALQDS/ 8//// 57017
70006 10039 20032
 
10 A.M.  
Weather: Sky obscured in dense fog, fog drifting over and below summit,
sun dimly visible
Temperature: 43F; Dew Point: 42F; Wind: S at 9 kts
Sea-level pressure: 30.34 ins. Hg, decreasing    
Visibility: 1/16 mile, dense fog
BHO SA 1455 W5 X 1/16F 274/43/42/1809/034/ DNS FG ALQDS FG DRFTG
OVR/BLO SMT SUN DMLY VSBL/ 8//// 58015
 
1 P.M.  
Weather: Scattered cumulus/cumulus fractus, scattered altocumulus,
broken cirrostratus, distant fog all quadrants, stratus fractus drifting
aloft all quadrants, contrail S, sun dimly visible, partial halo
Temperature: 47F; Dew Point: 45F; Wind: SSW at 6 kts
Sea-level pressure: 30.25 ins. Hg, decreasing rapidly  
Visibility: 20 miles, 10 miles N-ENE, distant fog
6-hour max. temp: 47F  
6-hour min. temp: 34F 
BHO SA 1755 60 SCT 150 SCT 200 BKN 20 243/47/45/2006/025/ DSNT FG ALQDS
STFRA DRFTG ALFT ALQDS CONTRAIL S SUN DMLY VSBL PARTIAL HALO VSBY LWR
N-ENE 10/ 8/667 58031 10047 20034
 
 
WEATHER SUMMARY FOR SATURDAY, DECEMBER 1
 
TEMPERATURE (DEGREES F)
MAX.....34      NORMAL.....44
MIN.....25      NORMAL.....29
MEAN....30      NORMAL.....37
 
DEPARTURE FROM 30-YEAR NORMAL.....................-7
TOTAL DEPARTURE FOR THE MONTH.....................-7 [-7.2 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............35    DEPARTURE........+6
TOTAL HEATING UNITS FOR THE MONTH............35    DEPARTURE.......-23
TOTAL HEATING UNITS FOR THE SEASON.........1185   DEPARTURE.......-105
TOTAL HEATING UNITS LAST SEASON TO DATE.....932    DIFFERENCE.....+253
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............12 E   AT 11:53 P.M. *
                   AERO...................14 E   AT 11:53 P.M. *
                   ASOS...................15 ENE AT  7:05 P.M.
                   DAVIS..................14 ENE AT  7:02 P.M. RMY 16
THE FASTEST MILE FOR YESTERDAY............12 E   AT 11:50 P.M. *
MAXIMUM 2-MINUTE ASOS AVERAGE.............13 E   AT 11:53 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE............14 ENE AT  7:02 P.M.
AVERAGE WIND SPEED AND DIRECTION.........6.5 NNE
                   ASOS..................6.6
                   DAVIS.................6.2 NNE [015 deg]
* last of several occurrences
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.06   DEPARTURE..........-0.10
                         ASOS..............0.06
TOTAL PRECIPITATION FOR THE MONTH..........0.06   DEPARTURE..........-0.10
                         ASOS..............0.06
TOTAL PRECIPITATION FOR THE YEAR..........34.94   DEPARTURE.........-13.75
                         ASOS.............34.95
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M.........0.8    DEPARTURE..........+0.5
TOTAL SNOWFALL FOR THE MONTH...............0.8    DEPARTURE..........+0.6
TOTAL SNOWFALL FOR THE SEASON..............6.8    DEPARTURE..........+4.0
 
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
 
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
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12/1  34/25/30/-7/0.08/0.8/.../..     12 E   AERO 14 MPH E   RMY 16
 
12/2 morning low temp: 32F; the normal low is now 28F
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
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
 
RECORDS FOR DECEMBER 3
HIGH 67 IN 2009
LOW  -1 IN 1890
PRECIP 2.10 INS. IN 1986
SNOWFALL 6.0 INS. IN 1963
PEAK GUST 73e MPH W IN 1942
 
TODAY'S REPORT PREPARED BY: George Tabeek/Peter Volpe