BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, JUNE 4, 2009    
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:

7 A.M.   
Weather: Broken altocumulus, few stratus E-S, 
stratocumulus E-S-SW, line of clear sky 
extending WNW-N-NNE
Temperature: 55F, Dew point: 52F, Wind: SSW at 8 kts
Sea-level pressure: 30.00 inches Hg, rising
Visibility: 50 miles, 75 miles WNW and 20 miles E-S
6-hour minimum temp: 53F   
6-hour rainfall: trace
24-hour rainfall: trace 
BHO SA 1155 80 SCT E120 BKN 50 160/55/52/2108/000/ 
FEW STRA E-S SC E-S-SW LINE OF CLR SKY XTDNG WNW-N-NNE 
VSBY E-S 20 WNW 75/ 8/670 51007 MANUAL 6000/ 10056 20053 

10 A.M.   
Weather: Broken altocumulus, broken cirrus, 
few stratocumulus all quadrants
Temperature: 63F, Dew point: 53F, Wind: WSW at 5 kts,
Wind: Light and variable
Sea-level pressure: 30.01 inches Hg, rising
Visibility: 70 miles
BHO SA 1455 E150 BKN 250 BKN 70 162/63/53/2405/001/ 
FEW SC ALQDS WND L/V/ 8/531 50002 

1 P.M.   
Weather: Scattered cumulus, thin overcast cirrus
Temperature: 70F, Dew point: 49F, Wind: ssw at 5 kts,
Wind: Light and variabile
Sea-level pressure: 29.97 inches Hg, falling
Visibility: 55 miles, light haze
6-hour maximum temp: 71F   
1755 50 SCT 250 –OVC 55 150/70/49/2105/997/ 
LGT HZ WND L/V/ 8/107 58012 10071 20055

WEATHER SUMMARY FOR WEDNESDAY, JUNE 3

TEMPERATURE (DEGREES F)
MAX.....69    NORMAL.....72
MIN.....54    NORMAL.....53
MEAN....62    NORMAL.....62

DEPARTURE FROM 30-YEAR NORMAL............0
TOTAL DEPARTURE FOR THE MONTH...........-4 [-1.5 DEGREES/DAY] 

HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............3  DEPARTURE.......-1
TOTAL HEATING UNITS FOR THE MONTH............13  DEPARTURE.......-1
TOTAL HEATING UNITS FOR THE SEASON.........6134  DEPARTURE.....-177
TOTAL HEATING UNITS LAST SEASON TO DATE....5901  DIFFERENCE....+233

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............23 SSW AT  4:41 P.M.   
                   AEROVANE..............20 SSW AT  4:41 P.M. 
                   ASOS..................21 SW  AT  4:41 P.M.       
                   DAVIS.................22 SSW AT  4:40 P.M. 
FASTEST MILE FOR YESTERDAY...............17 SSW AT  4:38 P.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE............15 SW  AT  4:53 P.M.       
MAXIMUM 2-MINUTE DAVIS AVERAGE...........17 SSW AT  4:54 P.M. 
AVERAGE WIND SPEED AND DIRECTION.........9.9 NW
                   ASOS..................9.5
                   DAVIS................10.0 W [277 DEG]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....trace DEPARTURE....-0.13
                         ASOS..............0.00
TOTAL PRECIPITATION FOR  JUNE..............0.00  DEPARTURE....-0.39
                         ASOS..............0.00  
TOTAL PRECIPITATION FOR THE YEAR..........18.50  DEPARTURE....-3.63
                         ASOS.............19.55  
 
PRELIMINARY CLIMATE SUMMARY FOR JUNE 2009 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane recording wind system gust when significant
TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized

6/1  69/41/55/-7/0/706/78          29 SSW 
6/2  76/53/65/+3/T/525/58          28 S 
6/3  69/54/62/0/T/254/28           23 SSW    AERO 20 MPH SSW

6/4  our morning low temp: 53F, the normal low is 53F 

NEW DAILY RECORDS FOR JUNE 2009 TO DATE...
None
 
DAILY EXTREMES

Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR JUNE 4
HIGH 99F IN 1919 [Record for month]
LOW 41F IN 1915,1926
PRECIP 1.52 INS IN 2007 
PEAK GUST 48 MPH SSE IN 1983

RECORDS FOR JUNE 5
HIGH 95F IN 1930
LOW 41F IN 1891
PRECIP 2.83 INS IN 1982
PEAK GUST 57 MPH NNW IN 1988

TODAY'S REPORT PREPARED BY: Stephanie Radner