BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, AUGUST 13, 2009
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:

7 A.M.   
Weather: Obscurement with heavy fog   
Temperature: 64F, Dew point: 64F, Wind: NE at 8 kts 
Sea-level pressure: 30.12 inches Hg, rising 
Visibility: 1/16 mile 
6-hour minimum temp: 63F
24-hourly precipitation: 0.16 inch 
BHO SA 1155 W3 X 1/16F 201/64/64/0408/012/ 8//// 53009 
MANUAL 6016/ ASOS 60015 MANUAL 70016 ASOS 70015 10064 20063

10 A.M. 
Weather: Obscurement with heavy fog
Temperature: 63F, Dew point: 63F, Wind: NNE at 12 kts
Wind: Direction variable NNW to E
Sea-level pressure: 30.14 inches Hg, rising 
Visibility: 1/16 mile
3-hourly precipitation: 0.01 inch
BHO SA 1455 W1 X 1/16L-F 205/63/63/0312/014/ WND 33V90/
8//// 53004 MANUAL 6001/ ASOS 60001
 
1 P.M. 
Weather: Overcast stratus, bright spots in overcast
Temperature: 64F, Dew point: 63F, Wind: NNE at 9 kts,
Wind: direction variabile NNW to NE
Sea-level pressure: 30.14 inches Hg, rising
Visibility: 8 miles, 15 miles W-NW
6-hourly max. temp: 64F
6-hourly precipitation: 0.02 inch 
BHO SA 1755 E15 OVC 8 207/64/63/0309/014/ 
BRGHT SPTS IOVC VSBY W-NW 15 WND 33V04/ 8/6// 50002 
MANUAL 6002/ ASOS 60003 10064 20063


WEATHER SUMMARY FOR WEDNESDAY, AUGUST 12

TEMPERATURE (DEGREES F)
MAX.....67    NORMAL.....80
MIN.....63    NORMAL.....62 
MEAN....65    NORMAL.....71

DEPARTURE FROM 30-YEAR AVERAGE..........-6
TOTAL DEPARTURE FOR THE MONTH...........+2  [0.0 DEGREES/DAY]

HEATING DEGREE DATA WILL RESUME IN SEPTEMBER 

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............18 N   AT  3:49 A.M.  
                   AEROVANE..............15 NNE AT  3:53 A.M.  
                   ASOS..................16 NE  AT  3:53 A.M.      
                   DAVIS.................16 NE  AT  1:16 P.M.   
FASTEST MILE FOR YESTERDAY...............11 E   AT  9:05 P.M.   
MAXIMUM 2-MINUTE ASOS AVERAGE............12 E   AT  9:05 P.M.       
MAXIMUM 2-MINUTE DAVIS AVERAGE...........12 E   AT  9:04 P.M.    
AVERAGE WIND SPEED AND DIRECTION........7.1 NNE
                   ASOS.................6.9  
                   DAVIS................6.6 NE  [040 DEG]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.16   DEPARTURE....+0.03
                         ASOS..............0.15
TOTAL PRECIPITATION FOR THE MONTH..........0.82   DEPARTURE....-0.71
                         ASOS..............0.81
TOTAL PRECIPITATION FOR THE YEAR..........32.08   DEPARTURE....+1.14
                         ASOS.............33.19 

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 our morning low temp: 63F; 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 13
HIGH 98F IN 1944, 2002
LOW 47F IN 1902, 1957
PRECIP 2.92 INCHES IN 1989
PEAK GUST 52 MPH SSE IN 1963

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

TODAY'S REPORT PREPARED BY: Stephanie Radner