BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, JULY 2, 2009    
ALL TIMES ARE IN EASTERN STANDARD TIME

Today's observations:

7 A.M.   
Weather: Obscured with heavy fog, light drizzle
Temperature: 59F, Dew point: 59F, Wind: NNE at 14 kts 
Sea-level pressure: 29.85 inches Hg, falling
Visibility: 1/16 mile
6-hour minimum temp: 56F
24-hour rainfall: 0.69 inch
BHO SA 1155 W1 X 1/16L-F 109/59/59/0214/985/ 
8//// 55001 MANUAL 600X/ ASOS 60018 MANUAL 70069 ASOS 70070 
10059 20056

10 A.M.   
Weather: Overcast stratus, patchy stratus layer below 
summit SW, bright spots in over cast S-SW
Temperature: 64F, Dew point: 63F, Wind: ENE at 12 kts 
Sea-level pressure: 29.84 inches Hg, falling
Visibility: 1 mile, 2 miles S-W
3-hourly rainfall: 0.55 inch
BHO SA 1455 E20 OVC 1F 104/64/63/0612/984/ 
PTCHY STRA LYR BLO SMT SW BRGHT SPTS IOVC S-SW 
VSBY S-W 2 RE10/ 8/6// 58005 MANUAL 6055/ ASOS 60056
 
1 P.M.   
Weather: Obscurement with heavy fog
Temperature: 65F, Dew point: 65F, Wind: ENE at 8 kts
Sea-level pressure: 29.83 inches Hg, falling
Visibility: 1/16 mile
6-hourly max. temp. 66F
6-hourly rainfall: 0.82 inch 
BHO SA 1755 W1 X 1/16F 100/65/65/0608/983/ 
8//// 58004 MANUAL 6082/ ASOS 60084 10066 20059
 

WEATHER SUMMARY FOR WEDNESDAY, JULY 1

TEMPERATURE (DEGREES F)
MAX.....62    NORMAL.....79
MIN.....57    NORMAL.....60
MEAN....60    NORMAL.....70

DEPARTURE FROM 30-YEAR NORMAL..........-10
TOTAL DEPARTURE FOR THE MONTH..........-10 

HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............5  DEPARTURE.......+4
TOTAL HEATING UNITS FOR THE MONTH.............5  DEPARTURE.......+4
TOTAL HEATING UNITS FOR THE SEASON............5  DEPARTURE.......+4
TOTAL HEATING UNITS LAST SEASON TO DATE.......0  DIFFERENCE......+5

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............25 NNE AT  4:19 P.M.   
                   AEROVANE..............22 NNE AT  4:19 P.M.    
                   ASOS..................22 NE  AT  4:31 P.M.    
                   DAVIS.................21 NNE AT  4:19 P.M.  
FASTEST MILE FOR YESTERDAY...............17 NNE AT  4:21 P.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE............16 NE  AT  4:32 P.M.       
MAXIMUM 2-MINUTE DAVIS AVERAGE...........16 NNE AT  4:21 P.M.     
AVERAGE WIND SPEED AND DIRECTION........8.5 NNE
                   ASOS.................8.5
                   DAVIS................8.5 NE [036 DEG]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.69  DEPARTURE....+0.56
                         ASOS..............0.70
TOTAL PRECIPITATION FOR  JULY..............0.72  DEPARTURE....+0.59
                         ASOS..............0.72  
TOTAL PRECIPITATION FOR THE YEAR..........24.36  DEPARTURE....-1.44
                         ASOS.............25.37  
 
PRELIMINARY CLIMATE SUMMARY FOR JULY 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

7/1  62/57/60/-10/.../../000/00    25 NNE   AERO 22 MPH NNE

7/2  morning low temp: 56F; our normal low is now 60F

NEW DAILY RECORDS FOR JULY 2009 TO DATE...
NONE 
  
DAILY EXTREMES

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

RECORDS FOR JULY 2
HIGH 95F IN 1963
LOW 47F IN 1988
PRECIP 1.42 INS IN 1986
PEAK GUST 45 MPH SW IN 1999

RECORDS FOR JULY 3
HIGH 99F IN 1911
LOW 47F IN 1914
PRECIP 1.36 IN 1985
PEAK GUST 52 MPH NW IN 1963

TODAY'S REPORT PREPARED BY: Stephanie Radner