BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, AUGUST 7, 2009
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:

7 A.M.   
Weather: Clear
Temperature: 64F, Dew point: 55F, Wind: WNW at 10 kts
Sea-level pressure: 29.96 inches Hg, rising
Visibility: 75 miles
6-hour minimum temp: 58F
BHO SA 1155 CLR 75 145/64/55/2910/996/ 
FEW CI DSNT N-NE/ 8/001 51014 10064 20058

10 A.M. 
Weather: Clear, few stratocumulus all quadrants, 
few cirrus distant E to S
Temperature: 74F, Dew point: 55F, Wind: W at 11 kts 
Wind: Direction variable WSW to NNW
Sea-level pressure: 29.94 inches Hg, falling
Visibility: 75 miles
BHO SA 1455 CLR 75 139/74/55/2711/994/ FEW SC ALQDS 
FEW CI DSNT E-S WND 24V33/ 8/501 50006

1 P.M.   
Weather: Scattered cumulus
Temperature: 77F, Dew point: 53F, Wind: W at 14 kts
Wind: Direction variable SW to NW
Sea-level pressure: 29.92 inches Hg, falling
Visibility: 80 miles
6-hourly max. temp: 78F  
BHO SA 1755 55 SCT 75 133/77/53/2714/992/ WND 22V31/ 
8/100 55006 10078 20064
  
WEATHER SUMMARY FOR THURSDAY, AUGUST 6

TEMPERATURE (DEGREES F)
MAX.....76    NORMAL.....81
MIN.....61    NORMAL.....62 
MEAN....69    NORMAL.....72

DEPARTURE FROM 30-YEAR AVERAGE..........-3
TOTAL DEPARTURE FOR THE MONTH...........+9  [+1.3 DEGREES/DAY]

HEATING DEGREE DATA WILL RESUME IN SEPTEMBER 

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............18 SSE AT  5:07 P.M. 
                   AEROVANE..............16 SSE AT  5:07 P.M.
                   ASOS..................17 S   AT  5:07 P.M.   
                   DAVIS.................18 WNW AT  N/A     
FASTEST MILE FOR YESTERDAY...............13 WNW AT  1:28 A.M. * 
MAXIMUM 2-MINUTE ASOS AVERAGE............14 N   AT  1:32 A.M.    
MAXIMUM 2-MINUTE DAVIS AVERAGE...........N/A     
AVERAGE WIND SPEED AND DIRECTION........8.3 SSE 
                   ASOS.................8.7 
                   DAVIS................8.1 W [263 DEG]
* last of several occurrences
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00   DEPARTURE....-0.13
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH.........Trace   DEPARTURE....-0.75
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE YEAR..........31.26   DEPARTURE....+1.10
                         ASOS.............32.38 

PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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

8/1  83/63/73/+1/0/823/95    18 SSE
8/2  77/64/71/-1/T/104/12    25 SSE
8/3  84/67/76/+4/0/638/74    17 SW 
8/4  83/66/75/+3/0/714/83    23 S
8/5  86/67/77/+5/T/378/44    27 SSW
8/6  76/61/69/-3/0/564/66    18 SSE

8/7  our morning low temp: 58F; the normal low is now 62F
 
NEW DAILY RECORDS FOR AUGUST 2009 TO DATE...
NONE
  
DAILY EXTREMES

Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):

RECORDS FOR AUGUST 7
HIGH 95F IN 1924
LOW 51F IN 2004
PRECIP 3.32 INCHES IN 1926
PEAK GUST 51 MPH NE 1975

RECORDS FOR AUGUST 8
HIGH 93F IN 1909,1949
LOW 47F IN 1903
PRECIP 3.08 INCHES IN 1976
PEAK GUST 45 MPH WNW IN 1958

TODAY'S REPORT PREPARED BY: Stephanie Radner