BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, OCTOBER 6, 2009 
ALL TIMES ARE IN EASTERN STANDARD TIME
 
A VERY PLEASANT VERY SUNNY AND MILD OCTOBER DAY
WITH TEMPERATURES INTO THE MID 60'S
 
Sunshine prevails today with just some scattered
cumulus and stratocumulus clouds and some thin
cirrus above.  Temperatures have risen from a
rather chilly 45F to 65F by early afternoon
along with mostly gentle westerly winds.
 
Today's observations:
 
7 A.M.
Weather: Clear, few stratocumulus distant WNW-N along
the horizon   
Temperature: 48F, Dew point: 44F, Wind: W at 12G22 kts
Sea-level pressure: 29.93 inches Hg, rising
Visibility: 70 miles 
6-hour minimum temp: 45F
24-hour precipitation: 0.00 inches
BHO SA 1155 CLR 70 134/48/44/2713G22/993/
FEW SC DSNT WNW-N ALG HRZN WND GRDL VEERING/
8/500 51012 10048 20045 
 
10 A.M.
Weather: Clear, cumulus fractus, cumulus forming
to the distant southwest thru north, cirrus mostly
distant NW-NE
Temperature: 59F, Dew point: 44F, Wind: W at 11 kts,
Wind: direction variable WSW-WNW 
Sea-level pressure: 29.94 inches Hg, falling
Visibility: 70 miles, mountain in cloud 70 NW 
BHO SA 1455 CLR 70 136/59/44/2611/994/
CUFRA/CU FRMG DSNT SW-N CI MSTLY DSNT NW-NE
MTN INCLD 70 NW WND 24V30/ 8/101 50002
 
1 P.M.   
Weather: Scattered cumulus, few moderate tops, stratocumulus
formed by the spreading out of cumulus, scattered cirrus 
Temperature: 65F, Dew point: 45F, Wind: W at 12 kts,
Wind: Direction variable SW to WNW
Sea-level pressure: 29.90 inches Hg, falling
Visibility: 80 miles 
6-hour maximum temp: 65F
BHO SA 1755 44 SCT 250 SCT 80 124/65/45/2712/990/
FEW MDT CU TOPS WND 23V30/ 8/401 58012 10065 20048
 
WEATHER SUMMARY FOR MONDAY, OCTOBER 5
 
TEMPERATURE (DEGREES F)
MAX.....64    NORMAL.....64
MIN.....49    NORMAL.....46
MEAN....57    NORMAL.....55
 
DEPARTURE FROM 30-YEAR AVERAGE...........+2
TOTAL DEPARTURE FOR THE MONTH............-6 [-1.4 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............8  DEPARTURE.......-2
TOTAL HEATING UNITS FOR THE MONTH............51  DEPARTURE.......+4
TOTAL HEATING UNITS FOR THE SEASON..........208  DEPARTURE.......-8
TOTAL HEATING UNITS LAST SEASON TO DATE.....170  DIFFERENCE.....+38
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............33 W   AT 3:47 P.M.  
                   AEROVANE..............31 W   AT 3:47 P.M. 
                   ASOS..................30 W   AT 3:48 P.M.  
                   DAVIS.................29 WSW AT 1:49 P.M.    
FASTEST MILE FOR YESTERDAY...............22 W   AT 3:48 P.M. *
MAXIMUM 2-MINUTE ASOS AVERAGE............22 W   AT 3:49 P.M.       
MAXIMUM 2-MINUTE DAVIS AVERAGE...........23 W   AT 3:48 P.M.       
AVERAGE WIND SPEED AND DIRECTION.......13.7 W        
                   ASOS................13.7 
                   DAVIS...............13.1 W [270 DEG]
 
* last of several occurrences....
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00   DEPARTURE....-0.14
                         ASOS..............0.00
TOTAL PRECIPITATION FOR MONTH..............1.10   DEPARTURE....+0.40                        
TOTAL ASOS PRECIPITATION FOR MONTH.........1.10
TOTAL PRECIPITATION FOR THE YEAR..........38.98   DEPARTURE....+0.68
                         ASOS.............40.16
 
PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 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
 
10/1 56/39/48/-9/0/155/22     27 WSW  AERO 23 MPH WSW
10/2 60/40/50/-6/0/442/63     23 SSE 
10/3 63/51/57/+1/1.10/000/00  32 ESE  AERO 30 MPH ESE 
10/4 67/57/62/+6/0/202/29     21 WSW
10/5 64/49/57/+2/0/595/86     33 W    AERO 31 MPH W
 
10/6 our morning low temp: 45F; the normal low is now 46F
 
NEW DAILY RECORDS FOR OCTOBER 2009
None.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR OCTOBER 6
HIGH 83F IN 1990,2007
LOW 26F IN 1965
PRECIP 3.78 INCHES IN 1962
PEAK GUST 60e MPH S IN 1942
 
RECORDS FOR OCTOBER 7
HIGH 88 IN 1963 (RECORD FOR MONTH)
LOW 30 IN 1904,1986
PRECIP 1.75 INCHES IN 1972
PEAK GUST 52 ESE IN 1972
 
TODAY'S REPORT PREPARED BY: Robert Skilling