BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JANUARY 4, 2009
ALL TIMES ARE IN EASTERN STANDARD TIME
 
7 A.M.
Weather: Clear
Temperature: 17F, Dew point: 6F, Wind: W at 17G20 kt
Sea-level pressure: 29.94 inches Hg, rising
Visibility: 80 miles
6-hour minimum temperature: 17F
Snow depth on ground: 4 inches
BHO SA 1155 CLR 80 138/17/6/2715G20/994/
FEW AC DSNT N-NE/ 8/070 4/004 53017 10020 20017
 
10 A.M.
Weather: Clear
Temperature: 24F, Dew point: 9F, Wind: W at 15G22 kt
Sea-level pressure: 29.95 inches Hg, rising
Visibility: 80 miles
BHO SA 1455 CLR 80 144/24/9/2815G22/995/
FEW CI SE-SW/ 8/001 53006
 
1 P.M.
Weather: Clear
Temperature: 32F, Dew point: 14F, Wind: W at 13G17 kt 
Sea-level pressure: 29.92 inches Hg, falling
Visibility: 80 miles
6-hour maximum temperature: 32F
BHO SA 1755 CLR 80 133/32/14/2713G17/992/
FEW CI S-SW/ 8/001 56011 10032 20017 
 
WEATHER SUMMARY FOR SATURDAY, JANUARY 3
 
TEMPERATURE (DEGREES F)
MAX.....32    NORMAL.....35
MIN.....21    NORMAL.....19
MEAN....27    NORMAL.....27
 
DEPARTURE FROM 30-YEAR NORMAL................0
TOTAL DEPARTURE FOR THE MONTH..............-24  [-8.2 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............38  DEPARTURE..........0
TOTAL HEATING UNITS FOR THE MONTH............138  DEPARTURE........+24
TOTAL HEATING UNITS FOR THE SEASON..........2378  DEPARTURE........-65
TOTAL HEATING UNITS LAST SEASON TO DATE.....2304  DIFFERENCE.......+74
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............43  WNW AT 10:19 A.M. 
                   AEROVANE.............44  WNW AT  9:55 A.M. 
                   ASOS.................41  WNW AT 10:35 A.M. 
                   DAVIS................41  WNW AT 10:34 A.M.  
FASTEST MILE FOR YESTERDAY..............35    W AT  9:56 A.M.   
MAXIMUM 2-MINUTE ASOS AVERAGE...........32   NW AT  9:57 A.M. 
MAXIMUM 2-MINUTE DAVIS AVERAGE..........33    W AT  9:57 A.M.  
                   AVERAGE........... 19.1    W
                   ASOS...............17.6
                   DAVIS..............17.0    W [263 deg]  
* Last of several occurrences.
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.00  DEPARTURE.........-0.15
                         ASOS...............0.00
TOTAL PRECIPITATION FOR JANUARY............TRACE  DEPARTURE.........-0.45
                         ASOS...............0.97 #
TOTAL PRECIPITATION FOR THE YEAR (2009)....TRACE  DEPARTURE.........-0.45
                         ASOS...............0.97 #
# Inclues erroneous ASOS precipitation data on 1/1/09 and 1/2/09
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0   DEPARTURE.........-0.5
TOTAL SNOWFALL FOR JANUARY................TRACE   DEPARTURE.........-1.5
TOTAL SNOWFALL FOR THE SEASON..............30.4   DEPARTURE........+15.3
 
PRELIMINARY CLIMATE SUMMARY FOR JANUARY 2009 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane recording wind system gust when significant
   TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
 
1/1 16/1/9/-18/0/0/538/98          44 WNW   Aero 44 MPH WNW
1/2 32/9/21/-6/0/0/.../..          28 S
1/3 32/21/27/0/0/0/.../..          43 WNW   Aero 44 MPH WNW
 
NEW DAILY RECORDS FOR JANUARY 2009...
 
..NONE..
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR JANUARY 4
HIGH 60F IN 2000
LOW -8F IN 1904, 1981
PRECIP 1.79 INS. IN 1982
SNOW 8.6 INS. 1923, 1941
WIND 84 MPH S IN 1982
 
RECORDS FOR JANUARY 5
HIGH 61F IN 2007
LOW -9F IN 1981
PRECIP 0.98 INS. IN 1993
SNOW 4.5 INS. IN 1891
WIND 70 MPH WNW IN 1959
 
TODAY'S REPORT PREPARED By: Andrew Hoell