BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, DECEMBER 6, 2007
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.   
Weather: Clear, few stratocumulus distant NNE-SSE   
Temperature: 15F, Dew point: 9F, Wind: WNW at 16G27 kts
Wind: Peak wind gust past hour 27 knots WNW @ 06:46 A.M.
Sea-level pressure: 30.05 inches Hg, rising 
Visibility: 55 miles
6-hour min temp: 15F 
24-hour precip: trace     
24-hour snowfall: trace 
Snow on ground: 1 inch  
BHO SA 1155 CLR 55 176/15/9/2916G27/005/ FEW SC DSNT NNE-SSE 
PK WND 3027/46/ 8/500 4/001 53039 10022 20015
 
10 A.M.   
Weather: Clear, few stratocumulus distant NNE-SSE   
Temperature: 20F, Dew point: 5F, Wind: WNW at 09 kts
Wind: Variable direction WSW-NNW
Sea-level pressure: 30.14 inches Hg, rising 
Visibility: 65 miles 
BHO SA 1455 CLR 65 206/20/5/2909/014/ FEW SC DSNT NE-SE 
WND 24V33/ 8/500 51030
 
1 P.M.   
Weather: Clear, few stratocumulus distant W-NW and NE-ESE
Temperature: 27F, Dew point: 6F, Wind: WNW at 09 kts
Wind: Variable direction WSW-NNW
Sea-level pressure: 30.17 inches Hg, rising
Visibility: 75 miles 
6-hour max. temp: 27F
6-hour precip: 0.00  
BHO SA 1755 CLR 75 216/27/6/2909/017/ FEW SC DSNT W-NW AND NE-ESE 
WND 24V33/ 8/500 53010 10027 20015 
 
WEATHER SUMMARY FOR WEDNESDAY, DECEMBER 5
 
TEMPERATURE (DEGREES F)
MAX.....29    NORMAL.....42 
MIN.....17    NORMAL.....27
MEAN....23    NORMAL.....35
DEPARTURE FROM 30-YEAR NORMAL..........-12 
TOTAL DEPARTURE FOR THE MONTH..........-57 [-11.6 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............42  DEPARTURE......+12
TOTAL HEATING UNITS FOR THE MONTH...........205  DEPARTURE......+57 
TOTAL HEATING UNITS FOR THE SEASON.........1285  DEPARTURE.....-152
TOTAL HEATING UNITS LAST SEASON TO DATE....1172  DIFFERENCE....+113
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............23 WNW AT 11:24 P.M.            
                   AEROVANE.............22 WNW AT 11:25 P.M.      
                   ASOS.................22 WNW AT 11:24 P.M.            
                   DAVIS................22 W   AT 11:24 P.M.             
FASTEST MILE FOR YESTERDAY..............14 WNW AT 11:22 P.M. *          
MAXIMUM 2-MINUTE ASOS AVERAGE...........15 NW  AT 11:25 P.M.        
MAXIMUM 2-MINUTE DAVIS AVERAGE..........18 W   AT 11:25 P.M.           
AVERAGE WIND SPEED AND DIRECTION.......10.2 WSW  
                   ASOS.................9.8       
                   DAVIS...............10.5 WSW [251 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..........0.65  DEPARTURE....-0.10
                         ASOS..............0.67  
TOTAL PRECIPITATION FOR THE YEAR..........39.49  DEPARTURE....-7.92
                         ASOS.............38.89  
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M.........trace DEPARTURE.....-0.3
TOTAL SNOWFALL FOR THE MONTH................2.0  DEPARTURE.....+0.9 
TOTAL SNOWFALL FOR THE SEASON...............2.8  DEPARTURE.....-1.2
 
PRELIMINARY CLIMATE SUMMARY FOR DECEMBER 2007...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 33/15/24/-12/0/0/493/88       54 WNW 
12/2 24/15/20/-16/0.03/0.3/000/00  28 WNW 
12/3 38/23/31/-4/0.62/1.7/000/00   47 W 
12/4 27/17/22/-13/T/T/106/19       48 W       
12/5 29/17/23/-12/T/T/239/43       23 WNW
 
12/6 morning low temp. 15F; normal low now 27F
  
NEW DAILY RECORDS FOR DECEMBER 2007: NONE
 
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 5 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 6 IN 1906
PRECIP 1.67 INS. IN 1953
SNOWFALL 4.0 INS. IN 1886
PEAK GUST 76e SE IN 1976
 
TODAY'S REPORT PREPARED By: Stephanie Radner