BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, AUGUST 14, 2009
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:

7 A.M.   
Weather: Scattered stratus, partial undercast
Temperature: 64F, Dew point: 62F, Wind: W at 5 kts 
Wind: Light and variable
Sea-level pressure: 30.19 inches Hg, rising 
Visibility: 2 miles, variable 1/8 to 8 miles, thin fog
6-hour minimum temp: 58F
24-hourly precipitation: 0.02 inch 
BHO SA 1155 –X 2 SCT 2VF 223/64/62/2605/019/ F3 
VSBY 1/8V8 VSBY INCRSNG PARTIAL UNDERCAST ALQDS 
ESTMTD TOP 6 HND OVR CTY N THN FG/ 8/600 53008 
MANUAL 70002 ASOS 70003 10064 20058

10 A.M. 
Weather: Clear, few cumulus
Temperature: 73F, Dew point: 64F, Wind: WSW at 5 kts
Wind: Light and variable
Sea-level pressure: 30.20 inches Hg, rising 
Visibility: 15 miles, hazy
BHO SA 1455 CLR 15 226/73/64/2505/020/ FEW CU ALQDS 
MDT CU DSNT W-NW HAZY WND LGT AND VRB/ 8/200 50003

1 P.M. 
Weather: Scattered cumulus
Temperature: 80F, Dew point: 65F, Wind: E at 2 kts
Wind: Light and variable
Sea-level pressure: 30.19 inches Hg, falling
Visibility: 15 miles, hazy
6-hourly max. temp: 81F
BHO SA 1755 40 SCT 15 222/80/65/E0902/019/ 
HAZY WND LGT AND VRB/ 8/100 58004 10081 20064

WEATHER SUMMARY FOR THURSDAY, AUGUST 13

TEMPERATURE (DEGREES F)
MAX.....66    NORMAL.....80
MIN.....60    NORMAL.....62 
MEAN....63    NORMAL.....71

DEPARTURE FROM 30-YEAR AVERAGE..........-8
TOTAL DEPARTURE FOR THE MONTH...........-6  [-0.7 DEGREES/DAY]

HEATING DEGREE DATA WILL RESUME IN SEPTEMBER 

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............23 NNE AT 11:06 A.M. *
                   AEROVANE..............20 NNE AT 11:06 A.M. *
                   ASOS..................22 NNE AT 11:06 A.M.      
                   DAVIS.................21 NE  AT  7:56 A.M.   
FASTEST MILE FOR YESTERDAY...............14 NNE AT 10:33 A.M. *
MAXIMUM 2-MINUTE ASOS AVERAGE............15 NE  AT 11:36 A.M.       
MAXIMUM 2-MINUTE DAVIS AVERAGE...........15 NE  AT  9:19 A.M.    
AVERAGE WIND SPEED AND DIRECTION........9.6 NNE
                   ASOS.................9.2
                   DAVIS................9.3 NNE  [032 DEG]
* last of several occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.02   DEPARTURE....-0.11
                         ASOS..............0.03
TOTAL PRECIPITATION FOR THE MONTH..........0.84   DEPARTURE....-0.82
                         ASOS..............0.84
TOTAL PRECIPITATION FOR THE YEAR..........32.10   DEPARTURE....+1.03
                         ASOS.............33.22 

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  TSTM 
8/6  76/61/69/-3/0/564/66    18 SSE
8/7  79/58/69/-2/0/836/98    32 W
8/8  74/55/65/-6/0/791/93    21 WNW
8/9  76/59/68/-3/T/178/21    25 SSE  
8/10 87/66/77/+6/0.12/584/69 27 W    TSTM  
8/11 84/66/75/+4/0.54/684/81 25 NE   TSTM  
8/12 67/63/65/-6/T/000/00    18 N
8/13 66/60/63/-8/0.18/042/05 23 NNE

8/14 our morning low temp: 58F; the normal low is now 61F 

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 14
HIGH 99F IN 2002
LOW 46F IN 1964
PRECIP 3.06 INCHES IN 1919
PEAK GUST 61 MPH WNW IN 1963

RECORDS FOR AUGUST 15
HIGH 95F IN 1928
LOW 47F IN 1964
PRECIP 1.55 INCHES IN 2004 
PEAK GUST 44e MPH S IN 1941

TODAY'S REPORT PREPARED BY: Stephanie Radner