BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JUNE 3, 2009   
ALL TIMES ARE IN EASTERN STANDARD TIME
 
MIDDLE AND HIGH CLOUDINESS PREVAILS TODAY
BUT THICKENING CLOUDS SHUT OUT SUNSHINE
BY EARLY AFTERNOON
 
Some sunshine this morning was followed by
increasing and thickening middle and high
cloudiness by late morning and early afternoon.
Temperatures started out at a near normal
low of 54F and rose to 69F during the late
morning before falling back a few degrees. 
 
Today's observations:
 
7 A.M.  
Weather: Scattered altocumulus, thin broken and overcast
cirrus with patches of dense cirrus, breaks in overcast
to the west, few altocumulus lenticularis   
Temperature: 58F, Dew point: 46F, Wind: NNW at 8 kts,
Wind: Direction variable WNW to N
Sea-level pressure: 30.03 inches Hg, rising
Visibility: 35 miles, 45 miles WNW and 25 miles NE-SE,
light haze 
6-hour minimum temp: 54F  
24-hour rainfall: trace
BHO SA 1155 130 SCT 160 SCT 220 –BKN 250 –OVC 35 169/58/46/3308/003/
FEW ACSL PTCHS DENS CI BINOVC W VSBY WNW 45 NE-SE 25 LGT HZ WND 30V36/
8/072 53022 10058 20054
 
10 A.M.  
Weather: Broken altocumulus, cirrus, patches dense cirrus,
cirrocumulus
Temperature: 68F, Dew point: 46F, Wind: NW at 9 kts,
Sea-level pressure: 30.03 inches Hg, falling
Visibility: 60 miles, 70 miles to the northwest  
BHO SA 1455 E140 BKN 220 –BKN 250 –BKN 60 169/68/46/3109/003/
FEW LWR AC S FEW PTCHS DENS CI/CC VSBY NW 70 WND 26V36/
8/039 50000
 
1 P.M.  
Weather: Overcast altostratus, few altocumulus to the
distant southeast, sun occasionally visible during
the hour, virga visible     
Temperature: 66F, Dew point: 44F, Wind: W at 7 kts,
Wind: Direction variability WSW to WNW
Sea-level pressure: 30.01 inches Hg, falling
Visibility: 60 miles, northwest 75 miles 
6-hour maximum temp: 69F  
BHO SA 1755 E130 OVC 60 163/66/44/2707/001/
VIRGA FEW AC DSNT SE SUN OCNL DMLY VSB VSBY NW 75
WND 24V30/ 8/07/ 58007 10069 20058   
 
WEATHER SUMMARY FOR TUESDAY, JUNE 2
 
TEMPERATURE (DEGREES F)
MAX.....77    NORMAL.....72
MIN.....53    NORMAL.....52
MEAN....65    NORMAL.....62
 
DEPARTURE FROM 30-YEAR NORMAL...........+3
TOTAL DEPARTURE FOR THE MONTH...........-4 [-2.2 DEG]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............ 0  DEPARTURE.......-5
TOTAL HEATING UNITS FOR THE MONTH............10  DEPARTURE........0
TOTAL HEATING UNITS FOR THE SEASON.........6131  DEPARTURE.....-176
TOTAL HEATING UNITS LAST SEASON TO DATE....5901  DIFFERENCE....+230
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............28 S   AT 12:09 A.M.  
                   AEROVANE..............24 S   AT 12:09 A.M.
                   ASOS..................25 S   AT 12:09 A.M.      
                   DAVIS.................27 S   AT 12-1  A.M. **    
FASTEST MILE FOR YESTERDAY...............19 S   AT  1:20 A.M. * 
MAXIMUM 2-MINUTE ASOS AVERAGE............20 S   AT  3:47 A.M.      
MAXIMUM 2-MINUTE DAVIS AVERAGE...........20 SSW AT  4-5  A.M. **   
AVERAGE WIND SPEED AND DIRECTION........10.3 SW
                   ASOS.................10.9
                   DAVIS................10.5 SSW [210 DEG]
 *  last of several occurrences...
 ** Davis peak gust and fastest 2 min. wind minute past the hour N/A,
   fastest 2 min. wind last of several occurrences...
 
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....-0.26
                         ASOS..............0.00 
TOTAL PRECIPITATION FOR THE YEAR..........18.50  DEPARTURE....-3.50
                         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/.../..          28 S
 
6/3  our morning low temp: 54F, 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 3
HIGH 98F IN 1919
LOW 38F IN 1929
PRECIP 2.40 INS 2006
PEAK GUST 47 MPH NW IN 1998
 
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
 
TODAY'S REPORT PREPARED BY: Robert Skilling