BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, DECEMBER 7, 2007
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.   
Weather: Scattered altocumulus, broken cirrus
Temperature: 24F, Dew point: 12F, Wind: SSE at 06 kts
Sea-level pressure: 30.41 inches Hg, rising 
Visibility: 30 miles
6-hour min temp: 15F 
24-hour precip: 0.00   
24-hour snowfall: 0.00 
Snow on ground: 1 inch  
BHO SA 1155 150 SCT 250 BKN 30 297/24/12/1506/041/ FEW SC OFFSHR 
NE-E PTCHS DENSE CI LGT HZ/ 8/552 4/001 50001 10024 20021
 
10 A.M.   
Weather: Overcast stratocumulus, breaks NE-SE, 
altocumulus clouds visible
Temperature: 28F, Dew point: 17F, Wind: SE at 11 kts
Sea-level pressure: 30.37 inches Hg, falling
Visibility: 35 miles 
BHO SA 1455 E32 OVC 35 285/28/17/1311/037/ 
BINOVC NE-SE HIER CLDS VSBL/ 8/57/ 58012
 
1 P.M.   
Weather: Overcast stratocumulus
Temperature: 33F, Dew point: 25F, Wind: SSE at 06 kts
Sea-level pressure: 30.29 inches Hg, falling
Visibility: 20 miles 
6-hour max. temp: 34F
6-hour precip: 0.00  
BHO SA 1755 E28 OVC 20 257/33/25/1606/029/ 
LGT HZ/ 8/5// 58028 10034 20024
 
WEATHER SUMMARY FOR THURSDAY, DECEMBER 6
 
TEMPERATURE (DEGREES F)
MAX.....28    NORMAL.....41 
MIN.....15    NORMAL.....27
MEAN....22    NORMAL.....34
DEPARTURE FROM 30-YEAR NORMAL..........-12 
TOTAL DEPARTURE FOR THE MONTH..........-69 [-11.7 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............43  DEPARTURE......+12
TOTAL HEATING UNITS FOR THE MONTH...........248  DEPARTURE......+69 
TOTAL HEATING UNITS FOR THE SEASON.........1328  DEPARTURE.....-140
TOTAL HEATING UNITS LAST SEASON TO DATE....1204  DIFFERENCE....+124
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............31 WNW AT  6:46 A.M.            
                   AEROVANE.............30 WNW AT  6:46 A.M.      
                   ASOS.................30 NW  AT  6:46 A.M.            
                   DAVIS................31 WNW AT  6:45 A.M.             
FASTEST MILE FOR YESTERDAY..............23 WNW AT  6:45 A.M.           
MAXIMUM 2-MINUTE ASOS AVERAGE...........23 NW  AT  6:47 A.M.        
MAXIMUM 2-MINUTE DAVIS AVERAGE..........24 WNW AT  6:47 A.M.           
AVERAGE WIND SPEED AND DIRECTION.......12.1 WNW  
                   ASOS................12.1       
                   DAVIS...............12.7 W  [276 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..........0.65  DEPARTURE....-0.25
                         ASOS..............0.67  
TOTAL PRECIPITATION FOR THE YEAR..........39.49  DEPARTURE....-8.07
                         ASOS.............38.89  
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.....-0.3
TOTAL SNOWFALL FOR THE MONTH................2.0  DEPARTURE.....+0.6 
TOTAL SNOWFALL FOR THE SEASON...............2.8  DEPARTURE.....-1.5
 
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 28/15/22/-12/0/0/554/100      31 WNW
 
12/7 morning low temp. 21F; 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 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
 
RECORDS FOR DECEMBER 8
HIGH 62 IN 1966
LOW -4 IN 1906
PRECIP 1.54 INS. IN 1969
SNOWFALL 2.5 INS. IN 2001
PEAK GUST 78e W IN 1979
 
TODAY'S REPORT PREPARED By: Stephanie Radner