BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, NOVEMBER 4, 2009 
ALL DATA IN EASTERN STANDARD TIME
 
CLEAR, VERY SUNNY, COLDER AND DRIER TODAY
 
Full sunshine has been recorded since sunrise
this morning in a clear sky with visibility 
up to 80 miles as the air has becomes colder
and drier.  The dew point has dropped through
the 20's and the high has struggled up to near
50F by early afternoon as compared to the
milder 57F we had yesterday afternoon.
 
Today's observations:
 
7 A.M.
Weather: Clear, few cumulus fractus, cumulus along the
shore E-ESE and few stratocumulus distant northwest  
Temperature: 35F, Dew point: 30F, Wind: W at 11 kts
Sea-level pressure: 30.24 inches Hg, rising
Visibility: 75 miles  
6-hour minimum temp: 34F
24-hourly precipitation: 0.00
BHO SA 1155 CLR 75 240/35/30/2711/024/
FEW CUFRA/CU ALGSHR E-ESE FEW SC DSNT NW/
8/800 53021 10041 20034
 
10 A.M.
Weather: Clear, few stratocumulus distant WNW-N,
few small cumulus and stratocumulus along the
shore NE-ESE 
Temperature: 44F, Dew point: 26F, Wind: W at 11 kts 
Sea-level pressure: 30.27 inches Hg, rising
Visibility: 80 miles 
BHO SA 1455 CLR 80 251/44/26/2711/027/
FEW SC DSNT WNW-N AND FEW SML CU/SC ALGSHR NE-ESE
CI SW-NW WND 24V31/ 8/800 51011
 
1 P.M. 
Weather: Clear, cirrus southwest thru northwest thru
northeast, lower dense cirrus distant west thru northwest,
lone small cumulus distant northwest 
Temperature: 49F, Dew point: 24F, Wind: WNW at 7 kts,
Wind: Direction variable west-southwest thru northwest 
Sea-level pressure: 30.26 inches Hg, falling
Visibility: 80 miles  
6-hourly max. temp: 49F 
BHO SA 1755 CLR 80 246/49/24/2907/026/
LONE SML CU DSNT NW CI SW-NW-NE LWR DENS
CI DSNT W-NW WND 25V32/
8/102 56005 10049 20035
 
WEATHER SUMMARY FOR TUESDAY, NOVEMBER 3
 
TEMPERATURE (DEGREES F)
MAX.....57     NORMAL.....54
MIN.....36     NORMAL.....38
MEAN....47     NORMAL.....46
 
DEPARTURE FROM 30-YEAR AVERAGE........... +1
TOTAL DEPARTURE FOR THE MONTH.............+5 [+1.5 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............18    DEPARTURE........-1
TOTAL HEATING UNITS FOR THE MONTH............51    DEPARTURE........-6
TOTAL HEATING UNITS FOR THE SEASON..........672  DEPARTURE.........+24
TOTAL HEATING UNITS LAST SEASON TO DATE.....613  DIFFERENCE........+59
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............32 W   AT  9:12 P.M.  
                   ASOS..................31 W   AT  9:13 P.M.  
                   AEROVANE..............32 W   AT  8:18 P.M.  
                   DAVIS.................33 W   AT  8:18 P.M.    
FASTEST MILE FOR YESTERDAY.............. 24 W   AT  8:19 P.M.  
MAXIMUM 2-MINUTE ASOS AVERAGE............22 W   AT  8:20 P.M.   
MAXIMUM 2-MINUTE DAVIS AVERAGE...........24 W   AT  8:19 P.M.  
AVERAGE WIND SPEED AND DIRECTION....... 9.8 W
                   ASOS................ 9.4
                   DAVIS...............10.0 W [280 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 MONTH  ............0.05   DEPARTURE....-0.40
               ASOS FOR MONTH..............0.03
TOTAL PRECIPITATION FOR THE YEAR..........45.16   DEPARTURE....+2.69  
                    ASOS..................46.34
                                                                 
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/.../.. 22 WNW  
11/2  49/42/46/0/T/.../..     29 NE
11/3  57/36/47/+1/0/.../..    32 W   AERO 32 MPH W    
 
11/4  our morning low temp: 34F; the normal low is now 38F
 
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 4
HIGH 77 IN 1987
LOW 22 IN 1891
PRECIP 3.27 INCHES IN 1910
SNOWFALL 6.4 IN 1945
PEAK GUST 73 WNW IN 1965
 
RECORDS FOR NOVEMBER 5
HIGH 76 IN 1994
LOW 18 IN 1908
PRECIP 4.26 INCHES IN 1955
SNOWFALL 1.5 IN 1892
PEAK GUST 69 W IN 2004
 
TODAY'S REPORT PREPARED BY: Robert Skilling