BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, DECEMBER 6, 2005
ALL TIMES ARE IN EASTERN STANDARD TIME

TODAY'S DISCUSSION.....

This morning's snow was enough to be barely measurable with 0.1
inch on the snow boards melted down to only a trace of precipitation.
December temperatures are now averaging 4 degrees COLDER THAN NORMAL.

Today's observations:

7 A.M.

overcast with 20 miles visibility with very light snow and
visibility southeast 10 miles; temp. 27; dewpoint 19;
wind WNW 07 MPH; six hourly min. temp. 27; 24 hourly snowfall
is a trace; precip: trace; snow depth on ground 2 inches...

BHO SA 1155 E20 OVC 20S- 129/27/19/3006/991/ VSBY SE 10 N 30 SB15 PCPN VRY LGT/
8/020 4/002 51002 MANUAL 6000/ 10028 20027

10 A.M.

overcast with 50 miles visibility; 60 miles northwest but
only 20 to the east and 15 southeast in snow; temp. 28; dewpoint 21;
wind WNW 12 MPH; snow ended 20 past the hour; total new snow pst 3 hrs 0.1 inch;
liquid precip: trace

BHO SA 1455 E16 OVC 50 132/28/21/3010/992/ BINOVC/LINE OF CLRG DSNT SW-NW
ALG HRZN VSBY NW 60 E 20 SE 15 PCPN 20 E 15 SE SE20 TOTAL NEW SNW PST 3 HRS 
0.1 IN/ 8/5// 53003 MANUAL 6000/

1 P.M.

mostly sunny with scattered clouds and 50 miles visibility;
except 30 miles in the southeast; temp. 32; dewpoint 16;
wind WNW 10 MPH; 6 hourly snowfall 0.1 inch; precip. trace;
six hourly max. temp. 32 deg.

BHO SA 1755 40 SCT 70 SCT 50 121/32/16/2909/989/ FEW SCSL VIRGA DSNT WNW-NW TOTAL 
NEW SNW PST 6 HRS 0.1 IN/ 8/530 56011 MANUAL 6000/ 10032 20026


WEATHER SUMMARY FOR MONDAY, DECEMBER 5:

TEMPERATURE (DEGREES F)
MAX.....32   NORMAL.....42   HAZEN 31.8 @  1:38 P.M.
MIN.....21   NORMAL.....28   HAZEN 21.2 @  4:32 A.M.
MEAN....27   NORMAL.....35

DEPARTURE FROM 30-YEAR NORMAL.......- 8
TOTAL DEPARTURE FOR THE MONTH.......-20 (-3.8 DEGREES/DAY)

HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY..........38   DEPARTURE....+ 8
TOTAL HEATING UNITS FOR THE MONTH.........168   DEPARTURE....+20
TOTAL HEATING UNITS FOR THE SEASON.......1233   DEPARTURE...-204
TOTAL HEATING UNITS LAST SEASON TO DATE..1437   DIFFERENCE..-110

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.........23 WSW AT 2:12 A.M. **
                   AEROVANE..........27 WSW AT 2:12 A.M. **
                   ASOS..............22 WSW AT 2:17 A.M.
                   DAVIS.............24 WSW AT 2:16 A.M.
FASTEST MILE FOR YESTERDAY...........20 WSW AT 2:13 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE........20 WSW AT 2:13 A.M.
MAXIMUM 1-MINUTE DAVIS AVERAGE.......19 WSW AT 2:12 A.M.
AVERAGE WIND SPEED AND DIRECTION.....10.2  SW
                   ASOS..............10.2  SW  [ 230 deg ]
                   DAVIS............. 9.6 WSW  [ 240 deg ]
** LAST OF SEVERAL OCCURRENCES.....

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M...trace   DEPARTURE....-0.15
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........0.24   DEPARTURE....-0.51
                         ASOS..............0.22
TOTAL PRECIPITATION FOR THE YEAR..........62.51   DEPARTURE...+15.30
                         ASOS.............61.37*
*EXCLUDES 3.19 INCHES OF ERRONEOUS PRECIPITATION RECORDED FROM 1/23-1/28.

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M.........trace  DEPARTURE....-0.3
TOTAL SNOWFALL FOR THE MONTH.................2.2  DEPARTURE....+1.1
TOTAL SNOWFALL FOR THE SEASON................4.3  DEPARTURE....+0.3

PRELIMINARY CLIMATE SUMMARY FOR DECEMBER 2005......CALENDAR DAY DATA
DATA REPORTED:
DATE  MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST

AERO: Aerovane recording wind system when significant
TSTM: Thunderstorm day
....: Data not yet available

12/1  43/35/39/+3/0/0/.../..       29 MPH N
12/2  41/31/36/0/0/0/.../..        46 MPH WSW Aero 51 MPH WSW
12/3  33/26/30/-5/0/0/.../..       46 MPH W   Aero 50 MPH W
12/4  28/22/25/-10/0.24/2.2/000/00 22 MPH W
12/5  32/21/27/-8/0/0/.../..       23 MPH WSW

12/6  morning low temp. 26 deg. came after 7 a.m. and also
0.1 snow after 7 a.m.....

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):

RECORDS FOR DECEMBER 6
HIGH 70 IN 2001
LOW 05 IN 1901,1935
PRECIP 2.36 INS. IN 1945
SNOWFALL 12.0 INS. IN 1886, 1981
PEAK GUST 74 MPH NW IN 1981

RECORDS FOR DECEMBER 7
HIGH 74 IN 1998
LOW 06 IN 1906
PRECIP 1.67 INS. IN 1953
SNOWFALL 4.0 INS. IN 1886
PEAK GUST 76e SE IN 1976

TODAY'S REPORT BY: Robert Skilling