BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, NOVEMBER 10, 2009  
ALL DATA IN EASTERN STANDARD TIME
 
HIGH DENSE OVERCAST BUT MILD TEMPS.
ALONG WITH GENTLE WINDS TODAY
VEERING FROM SOUTHWEST TO NORTHWEST
 
A dense overcast of cirrostratus becoming altostratus
clouds was preventing any sunshine today. The sun was
seen as only dimly visible. Temperatures continue very
mild with a low of 54F this morning rising to a high
in the lower 60's by early afternoon. 
Winds have veered from south-southwest early today to
northwest by afternoon. The air was becoming much drier
with dew points dropping from the upper 40's early today
to near 40 degrees by early afternoon.
 
Today's observations:
 
7 A.M.
Weather: High dense cirrostratus overcast, few altocumulus,
sun dimly visible
Temperature: 54F, Dew point: 48F, Wind: W at 10 kts,
Wind: Direction gradually veering past hour
Sea-level pressure: 30.23 inches Hg, rising
Visibility: 10 miles, hazy 
6-hour minimum temp: 54F
24-hour precip: 0.00 
BHO SA 1155 E200 OVC 10 237/54/48/2610/023/
FEW AC HIER CLD VSB ESE-SE SUN DMLY VSB HAZY
WND GRDLY VEERING PST HR/ 8/047 53009 10056 20054
 
10 A.M.
Weather: High dense cirrostratus overcast, few altocumulus,
sun dimly visible
Temperature: 60F, Dew point: 47F, Wind: NW at 7 kts,
Wind: Direction gradually veering
Sea-level pressure: 30.26 inches Hg, steady
Visibility: 12 miles
BHO SA 1455 E200 OVC 12 247/60/47/3107/026/
FEW AC OVHD SUN DMLY VSB HAZY WND GRDLY VEERING/ 8/047 51010
 
1 P.M. 
Weather: Overcast dense altostratus, few altocumulus,
sun dimly visible 
Temperature: 62F, Dew point: 41F, Wind: NW at 7 kts,
Sea-level pressure: 30.24  inches Hg, falling
Visibility: 20 miles, hazy  
6-hourly max. temp: 62F
BHO SA 1755 E160 OVC 20 241/62/41/3107/024/
FEW AC SUN DMLY VSB HAZY/ 8/07/ 58006 10062 20054
 
WEATHER SUMMARY FOR MONDAY, NOVEMBER 9
 
TEMPERATURE (DEGREES F)
MAX.....68     NORMAL.....52
MIN.....49     NORMAL.....36
MEAN....59     NORMAL.....44
 
DEPARTURE FROM 30-YEAR AVERAGE...........+15
TOTAL DEPARTURE FOR THE MONTH............+10 [+0.9 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............ 6    DEPARTURE.......-15
TOTAL HEATING UNITS FOR THE MONTH...........167    DEPARTURE.......-11
TOTAL HEATING UNITS FOR THE SEASON..........788    DEPARTURE.......+19
TOTAL HEATING UNITS LAST SEASON TO DATE.....672    DIFFERENCE.....+116
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............35 S   AT  10:53 A.M.  
                   AEROVANE..............35 S   AT  10:53 A.M. 
                   ASOS..................35 S   AT  10:53 A.M. 
                   DAVIS.................32 S   AT  10:52 A.M. 
FASTEST MILE FOR YESTERDAY...............25 S   AT   5:47 P.M. * 
MAXIMUM 2-MINUTE ASOS AVERAGE............26 S   AT  10:53 A.M. 
MAXIMUM 2-MINUTE DAVIS AVERAGE...........27 S   AT  10:53 A.M.
AVERAGE WIND SPEED AND DIRECTION.......15.1 S
                   ASOS................15.2
                   DAVIS...............14.8 S [190 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 MONTH  ............0.06   DEPARTURE....-1.30
                         ASOS..............0.04
TOTAL PRECIPITATION FOR THE YEAR..........45.17   DEPARTURE....+1.79
                         ASOS.............46.35
                 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.....-0.1
TOTAL SNOWFALL FOR THE MONTH................0.0  DEPARTURE.....-0.6
TOTAL SNOWFALL FOR THE SEASON...............3.0  DEPARTURE.....+2.2
                                               
PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 2009 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane wind recording system gust when significant
TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
 
11/1  58/44/51/+4/0.05/167/27 22 WNW  
11/2  49/42/46/0/T/099/16     29 NE
11/3  57/36/47/+1/0/474/77    32 W    AERO 32 MPH W    
11/4  49/34/42/-4/0/514/84    24 W
11/5  46/36/41/-4/0.01/006/01 21 N
11/6  47/31/39/-6/0/419/69    38 WNW  AERO 38 MPH WNW
11/7  49/29/39/-6/0/575/95    33 S
11/8  66/42/54/+10/0/549/91   31 SSW
11/9  68/49/59/+15/0/486/81   35 S    AERO 35 MPH S
 
11/10 our morning low temp: 54F; the normal low is now 36F
 
NEW DAILY RECORD FOR NOVEMBER 2009
None      
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR NOVEMBER 10
HIGH 75 IN 1931
LOW 20 IN 2004
PRECIP 2.11 INCHES IN 1888
SNOWFALL 2.2 IN 1987
PEAK GUST 83e S IN 1942
 
RECORDS FOR NOVEMBER 11
HIGH 68 IN 1984
LOW 17 IN 1956
PRECIP 1.14 INCHES IN 1991
SNOWFALL 2.5 IN 1986
PEAK GUST 64 NW IN 1962
 
TODAY'S REPORT PREPARED BY: Robert Skilling