BLUE HILL METEOROLOGICAL OBSERVATORY 
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, JUNE 23, 2011
ALL TIMES ARE IN EASTERN STANDARD TIME
 
LOW CLOUDS, DENSE FOG ALL DAY
RAINFALL TOTAL ALMOST AN INCH AND A HALF OVER
PAST 24 HOURS
 
No sunshine for a second straight today.
The rain came down heavily for a time last evening
and the total through 8 a.m. EDT was 1.44 inches.
Our high temperature today has been 62F early
this morning.
 
Today's observations:
 
7 A.M.  
Weather: Sky obscured with heavy fog and light drizzle, 
precipitation very light
Temperature: 60F, Dew point: 60F; Wind: NNE at 10 kts,
Wind: Direction variable NNW to ENE 
Sea-level pressure: 29.85 inches Hg, rising
Visibility: 1/16 mile, light drizzle and fog 
6-hour min. temp: 60F
6-hour precip: 0.02 in.
24-hour precip: 1.44 ins.
BHO SA 1155 W2 X 1/16L-F 110/60/60/0210/985/
GST 20 KTS PST HR PCPN VRY LGT/ 8//// 53015
ASOS 60002 MANUAL 6002/ ASOS 70144 MANUAL 70144
10062 20060
 
10 A.M.
Weather: Sky obscured with heavy fog and light drizzle,
precipitation very light
Temperature: 60F, Dew point: 60F; Wind: NNE at 11 kts,
Wind: Direction variable N-ENE
Sea-level pressure: 29.86 inches Hg, rising
Visibility: 1/16 mile
BHO SA 1455 W2 X 1/16L-F 111/60/60/0211/986/
GST 20 KTS PST HR PCPN VRY LGT WND 35V07/ 8////
51001 MANUAL 6000/
 
1 P.M.
Weather: Sky obscured heavy fog, light rain and light drizzle
Temperature: 59F, Dew point: 59F; Wind: NE at 11G22 kts,
Wind: Direction variable N-NE 
Sea-level pressure: 29.86 inches Hg, rising slightly 
Visibility: zero variable 1/16, light rain, drizzle and fog
6-hour max. temp: 61F  
6-hourly rainfall: 0.01 in.
BHO SA 1755 W1 X 1/16VR-L-F 113/59/59/0511G22/986/
VSBY 0V1/16 WND 35V05/ 8//// 51002 MANUAL 6001/ 10061 20059
 
WEATHER SUMMARY FOR WEDNESDAY, JUNE 22
 
TEMPERATURE (DEGREES F)
MAX.....70    NORMAL.....77  
MIN.....62    NORMAL.....57
MEAN....66    NORMAL.....67
 
DEPARTURE FROM 30-YEAR NORMAL...................-1
TOTAL DEPARTURE FOR THE MONTH...................+2 [-0.1 DEGREES/DAY]
 
HEATING DEGREE DAYS    
TOTAL HEATING UNITS FOR YESTERDAY.............0    DEPARTURE.........-2 
TOTAL HEATING UNITS FOR THE MONTH............70    DEPARTURE.........+4
TOTAL HEATING UNITS FOR THE SEASON.........6223    DEPARTURE.......-140
TOTAL HEATING UNITS LAST SEASON TO DATE....5678    DIFFERENCE......+545
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............28 E  AT   8:47 P.M.  
                   AEROVANE...............29 E  AT   8:47 P.M. 
                   ASOS...................26 E AT    8:54 P.M.
                   DAVIS..................27 ENE AT  8:47 P.M.
THE FASTEST MILE FOR YESTERDAY............23 E  AT   8:49 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE.............21 E  AT   8:52 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE............21 E  AT   8:49 P.M.
AVERAGE WIND SPEED AND DIRECTION.........6.6 E
                   ASOS..................6.5
                   DAVIS.................6.2 E [090 deg]
 
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....1.44  DEPARTURE........+1.31
                         ASOS..............1.44  
TOTAL PRECIPITATION FOR THE MONTH..........4.55  DEPARTURE........+1.86
                         ASOS..............4.51
TOTAL PRECIPITATION FOR THE YEAR..........26.74  DEPARTURE........+2.11
                        ASOS..............27.33**
**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/SNOW/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/..../000/00         28 E
 
6/23 our morning low temp: 60F; the normal low is now 58F
 
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 23
HIGH 93F IN 1888
LOW 45F IN 1885
PRECIP 0.70 INS IN 2006
PEAK GUST 63 MPH SE IN 1972 (AGNES)
 
RECORDS FOR JUNE 24
HIGH 91F IN 1914,1976
LOW 40F IN 1932
PRECIP 2.80 INS IN 1929
PEAK GUST 46 MPH S IN 1985
 
TODAY'S REPORT PREPARED BY: Robert Skilling/George Tabeek