BLUE HILL METEOROLOGICAL OBSERVATORY 
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, JUNE 30, 2011
ALL TIMES ARE IN EASTERN STANDARD TIME
 
MONTH OF JUNE ENDING SEASONABLY WARM AND DRY
AS MONTH TURNS OUT NEAR NORMAL IN TEMPERATURE
AND WETTER THAN NORMAL IN RAINFALL
 
The day is pleasantly sunny, warm and dry with
dew points in the 50's and the high temperature
approaching 80 degrees after a slightly cooler
than normal morning low of 58 degrees.  The normal
low is now 60F. The normal high temperature for
this last day of June is 79F.
 
Today's observations:
 
7 A.M.  
Weather: Clear, few cumulus fractus forming distant WNW-NW,
cirrus/dense cirrus layer extending distant E-S, few cirrus
distant NNW-N 
Temperature: 65F, Dew point: 56F; Wind: W at 10 kts,
Wind: Direction variable WSW-NW
Sea-level pressure: 29.88 inches Hg, rising 
Visibility: 55 miles, light distant haze  
6-hour min. temp: 58F
BHO SA 1155 CLR 55 120/65/56/2710/988/ FEW CUFRA FRMG DSNT
WNW-NW CI/DNS CI LYR XTDNG DSNT E-S CI DSNT NNW-N WND 24V31/
8/102 51008 10065 20058
 
10 A.M.
Weather: Scattered cumulus fractus, cumulus, scattered
dense cirrus (W-NW)  
Temperature: 74F, Dew point: 57F; Wind: WNW at 11 kts,
Wind: Gust to 21 kts past hour,
Wind: Direction variable WSW-NNW 
Sea-level pressure: 29.89 inches Hg, rising
Visibility: 55 miles, light distant haze  
BHO SA 1455 36 SCT 200 SCT 55 122/74/57/2911/989/ CUFRA/CU FRMG ALQDS
PTCHS DNS CI DSNT W-NW GST TO 21 KTS PST HR WND 25V33 LGT DSNT HZ/
8/102 53002
 
1 P.M.
Weather: Broken cumulus/stratocumulus, patches broken altocumulus
generated by cumulus (west-northwest)  
Temperature: 78F, Dew point: 57F; Wind: W at 12 kts,
Wind: Gust to 22 kts past hour
Wind: Direction variable WSW-NW
Sea-level pressure: 29.87 inches Hg, falling
Visibility: 40 miles, distant haze increasing
6-hour max temp: 79F 
BHO SA 1755 E60 BKN 70 BKN 40 116/78/57/2812/987/
FEW MDT FEW ACCU WNW GST TO 22 KTS PST HR WND 25V32 DSNT HZ INCR/
8/460 58006 10079 20065    
 
WEATHER SUMMARY FOR WEDNESDAY, JUNE 29
 
TEMPERATURE (DEGREES F)
MAX.....82    NORMAL.....78
MIN.....62    NORMAL.....59
MEAN....72    NORMAL.....69
 
DEPARTURE FROM 30-YEAR NORMAL....................+3
TOTAL DEPARTURE FOR THE MONTH...................-13 [-0.6 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............0    DEPARTURE.........-1
TOTAL HEATING UNITS FOR THE MONTH............86    DEPARTURE........+13
TOTAL HEATING UNITS FOR THE SEASON.........6239    DEPARTURE.......-131
TOTAL HEATING UNITS LAST SEASON TO DATE....5678    DIFFERENCE......+561
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............29 W   AT 11:12 P.M. *
                   AEROVANE...............31 W   AT 11:12 P.M. *
                   ASOS...................29 W   AT 11:12 P.M.  
                   DAVIS..................30 W   AT  5:22 P.M.  
THE FASTEST MILE FOR YESTERDAY............22 W   AT  5:21 P.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE.............22 W   AT  5:22 P.M.  
MAXIMUM 2-MINUTE DAVIS AVERAGE............21 W   AT  5:23 P.M.  
AVERAGE WIND SPEED AND DIRECTION........10.8 W 
                   ASOS.................10.4 
                   DAVIS.................9.7 WSW [240 deg]
 
* last of several occurrences...
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE........-0.13
                         ASOS..............0.00  
TOTAL PRECIPITATION FOR THE MONTH..........5.12  DEPARTURE........+1.32
                         ASOS..............5.04
TOTAL PRECIPITATION FOR THE YEAR..........27.31  DEPARTURE........+1.77
                        ASOS..............27.86**
**ASOS data is in error due to system failure on 1/12-13
 
PRELIMINARY CLIMATE SUMMARY FOR JUNE 2011 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
 
6/1  80/60/70/+8/0.64/425/47         39 S    AERO 44 MPH S TSTM
6/2  72/52/62/0/0.00/697/77          50 WSW  AERO 54 MPH WSW
6/3  69/48/59/-3/0.00/870/96         36 W    AERO 39 MPH WNW
6/4  64/46/55/-8/0.00/881/97         27 NE  
6/5  70/46/58/-5/0.00/854/94         20 N
6/6  75/54/65/+2/0.00/801/88         17 SSE
6/7  85/59/72/+8/0.00/865/95         22 NW
6/8  90/64/77/+13/0.00/756/83        32 SW   TSTM (no rain)
6/9  88/65/77/+13/0.84/347/38        57 W    AERO 60 MPH W TSTM
6/10 74/60/67/+3/0.00/694/76         21 W
6/11 60/50/55/-10/0.83/000/00        28 ENE  AERO 30 MPH ENE
6/12 55/50/53/-12/0.56/000/00        29 N
6/13 64/51/58/-7/0.08/220/24         17 NNE
6/14 56/51/54/-11/0.04/000/00        28 NNW
6/15 70/51/61/-5/T/815/89            27 N
6/16 86/55/71/+5/0.00/870/95         24 SW
6/17 71/62/67/+1/0.12/174/19         41 S    AERO 43 MPH S
6/18 82/60/71/+5/0.00/633/69         22 WSW
6/19 76/59/68/+1/0.00/871/95         24 NW
6/20 79/58/69/+2/0.00/816/89         17 WSW
6/21 80/60/70/+3/0.00/770/84         21 SE
6/22 70/62/66/-1/1.42/000/00         28 E
6/23 62/57/60/-8/0.21/000/00         33 ENE  AERO 36 MPH ENE
6/24 60/56/58/-10/0.08/000/00        28 NE
6/25 68/54/61/-7/0.30/064/07         18 NNW  TSTM  
6/26 78/59/69/+1/0.00/174/19         17 SSW
6/27 80/61/71/+2/0.00/788/86         17 NE
6/28 82/64/73/+4/0.00/458/50         20 S
6/29 82/62/72/+3/T/631/69            29 W
 
6/30 our morning low temp: 58F; the normal low is now 60F
 
DAILY RECORDS FOR JUNE 2011
None so far...
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR JUNE 30
HIGH 94F IN 1964
LOW 47F IN 1919
PRECIP 3.04 INS IN 1921
PEAK GUST 51 MPH WNW IN 1957
 
RECORDS FOR JULY 1
HIGH 98F IN 1964
LOW 44F IN 1988 [RECORD FOR MONTH]
PRECIP 4.46 INS IN 1915 [RECORD FOR MONTH]
PEAK GUST 52 MPH WNW IN 1974
 
TODAY'S REPORT PREPARED BY: Robert Skilling/George Tabeek