BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, DECEMBER 8, 2007
ALL TIMES ARE IN EASTERN STANDARD TIME
 
LIGHT SNOWFALL MEASURES LESS THAN ONE INCH YESTERDAY
LOW TEMPERATURE NEAR NORMAL THIS MORNING
 
The light snow which began around mid-late afternoon on Friday
measured just 0.7 inch with a water content of 0.07.  The ended
before 7 p.m.  Overnight low temperatures were near normal this
morning for a change during this cold month with a low of 25
degrees.  Normal is now 26 degrees.
 
The additional snowfall late yesterday brought the total snow on
the ground to 1.5 inches (2 inches) as of 7 a.m. this morning.
 
Today's observations:
 
7 A.M.  
Weather: Overcast high clouds, altostratus and cirrostratus, few thin spots
Thin fog below inversion top estimated 6 hundred ft over city N
Temperature: 26F, Dew point: 24F, Wind: SW at 08 kts
Sea-level pressure: 30.XX inches Hg, rising
Visibility: 7 miles
6-hour min temp: 25F
24-hour precip: 0.00  
24-hour snowfall: 0.7 in. 
Snow on ground: 2 inches 
BHO SA 1155 150 SCT E220 BKN 250 OVC 7 XXX/26/24/2208/XXX/
OVC PTLY THN ESE-S AND DSNT NW AND ENE THN F BLO INVSN ESTMTD
TOP OF INVSN 6 HND OVR CTY N/ 8/017 4/002 56004 MANUAL 70007
ASOS 70006 10027 20025
 
10 A.M.  
Weather: Scattered altocumulus and cirrus/cirrocumulus
Temperature: 33F, Dew point: 27F, Wind: SW at 07 kts
Sea-level pressure: 30.21 inches Hg, rising
Visibility: 12 miles, hazy, smoke layer W-NE 
BHO SA 1455 150 SCT 220 -SCT 12 230/33/27/2207/021/ FEW ACSL
FEW CC PTCH SNW VIRGA SSE-S K LYR W-NE HAZY ALQDS/ 8/049 53007
 
WEATHER SUMMARY FOR FRIDAY, DECEMBER 7
 
TEMPERATURE (DEGREES F)
MAX.....34    NORMAL.....41
MIN.....21    NORMAL.....27
MEAN....28    NORMAL.....34
DEPARTURE FROM 30-YEAR NORMAL..........- 6
TOTAL DEPARTURE FOR THE MONTH..........-75 [-10.9 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............37  DEPARTURE......+ 6
TOTAL HEATING UNITS FOR THE MONTH...........285  DEPARTURE......+75
TOTAL HEATING UNITS FOR THE SEASON.........1365  DEPARTURE.....-134
TOTAL HEATING UNITS LAST SEASON TO DATE....1226  DIFFERENCE....+139
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............24 SSW AT  5:38 P.M.            
                   AEROVANE.............23 SSW AT  5:38 P.M.      
                   ASOS.................23 SSW AT  5:45 P.M.            
                   DAVIS................28 SSW AT  5:38 P.M.             
FASTEST MILE FOR YESTERDAY..............16 SE  AT 10:22 A.M. *           
MAXIMUM 2-MINUTE ASOS AVERAGE...........16 SW  AT 11:29 P.M.        
MAXIMUM 2-MINUTE DAVIS AVERAGE..........19 SSW AT  5:49 P.M.           
AVERAGE WIND SPEED AND DIRECTION.......10.5 WSW 
                   ASOS................10.4      
                   DAVIS...............10.5 SSW [200 deg]    
 
* last of several occurrences...
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.07  DEPARTURE....-0.08
                         ASOS..............0.06
TOTAL PRECIPITATION FOR THE MONTH..........0.72  DEPARTURE....-0.33
                         ASOS..............0.73 
TOTAL PRECIPITATION FOR THE YEAR..........39.56  DEPARTURE....-8.15
                         ASOS.............38.95  
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.7  DEPARTURE.....+0.4
TOTAL SNOWFALL FOR THE MONTH................2.7  DEPARTURE.....+1.0
TOTAL SNOWFALL FOR THE SEASON...............3.5  DEPARTURE.....-1.1
 
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 34/21/28/-6/0.07/0.7/.../..   24 SSW
 
12/8 morning low temp. 25F; our normal low is now 26F
 
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 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
 
RECORDS FOR DECEMBER 9
HIGH 68 IN 1966
LOW -14 IN 1902
PRECIP 1.52 INS. IN 1956
SNOWFALL 10.8 INS. IN 2005
PEAK GUST 66 SE IN 1973
 
TODAY'S REPORT PREPARED By: Robert Skilling