BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, JANUARY 4, 2007  
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.  
Weather: Broken middle and high clouds
Temperature: 40F, Dew point: 28F, Wind: SSW at 15 kts
Sea-level pressure: 30.16 inches Hg, rising 
Visibility: 40 miles 
6-hourly min. temp. 40 deg. 
BHO SA 1155 180 SCT E200 BKN 250 BKN 40 213/40/28/2015/016/ 
8/012 51008 10043 20040
  
10 A.M.    
Weather: Overcast with breaks
Temperature: 41F, Dew point: 31F, Wind: S at 11 kts
Sea-level pressure: 29.91 inches Hg, rising  
Visibility: 45 miles  
BHO SA 1455 180 SCT E200 BKN 250 OVC 45 217/41/31/1911/017/ 
THN SPTS IOVC/ 8/012 53004
 
1 P.M.    
Weather: Overcast middle and high clouds
Temperature: 49F, Dew point: 34F, Wind: S at 13 kts
Sea-level pressure: 30.10 inches Hg, falling  
Visibility: 60 miles  
BHO SA 1755 E150 BKN 200 BKN 250 OVC 60 192/49/34/1913/010/ 
THN SPTS IOVC/ 8/012 56025 10049 20040
 
WEATHER SUMMARY FOR WEDNESDAY, JANUARY 3 
 
TEMPERATURE (DEGREES F)
MAX.....49   NORMAL.....35 
MIN.....30   NORMAL.....19   
MEAN....40   NORMAL.....27
 
DEPARTURE FROM 30-YEAR NORMAL........+13
TOTAL DEPARTURE FOR THE MONTH....... +38 [ +12.5 PER DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY..........25   DEPARTURE......-13
TOTAL HEATING UNITS FOR THE MONTH......... 76   DEPARTURE......-38 
TOTAL HEATING UNITS FOR THE SEASON.......1949   DEPARTURE.....-494
TOTAL HEATING UNITS LAST SEASON TO DATE..2257   DIFFERENCE....-308
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY...........40 S    AT  2:37 P.M.                
                   AEROVANE............40 SSW  AT  2:45 P.M.                     
                   ASOS................38 S    AT  2:37 P.M.                   
                   DAVIS...............42 SSW  AT  2:33 P.M.               
FASTEST MILE FOR YESTERDAY.............32 S    AT  2:40 P.M.       
MAXIMUM 2-MINUTE ASOS AVERAGE..........31 S    AT  2:38 P.M.         
MAXIMUM 2-MINUTE DAVIS AVERAGE.........32 SSW  AT  1:34 P.M.                 
AVERAGE WIND SPEED AND DIRECTION..... 17.9 SSW 
                   ASOS.............. 18.0          
                   DAVIS............. 17.4 SSW   [214 deg] 
 
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 THE MONTH..........1.01  DEPARTURE......+0.56 
                         ASOS..............1.00    
TOTAL PRECIPITATION FOR 2006..............60.35  DEPARTURE......+9.57
                         ASOS.............59.91
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0   DEPARTURE.....-0.5
TOTAL SNOWFALL FOR THE MONTH................0.0   DEPARTURE.....-1.5
TOTAL SNOWFALL FOR THE SEASON...............3.7   DEPARTURE....-11.4
 
PRELIMINARY CLIMATE SUMMARY FOR JANUARY 2007......CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOWFALL/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
 
AERO: Aerovane recording wind system when significant
TSTM: Thunderstorm day
....: Data not yet available
 
1/1   53/30/42/+15/0.98/0/000/00     38 SE 
1/2   43/31/37/+10/0.03/0/505/92     44 W    Aero 47 MPH W   
1/3   49/30/40/+13/0/0/0/.../..      40 S    
 
1/4   morning low temp. 40 deg; normal low now 19 deg. 
 
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 58F IN 1950
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 By: Stephanie Radner