BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JUNE 17, 2009   
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.  
Weather: Thin scattered cirrus
Temperature: 58F, Dew point: 50F, Wind: WNW at 5 kts
Sea-level pressure: 30.29 inches Hg, rising
Visibility: 60 miles, light haze
6-hour minimum temp: 50F
24-hour rainfall: Trace
BHO SA 1155 250 -SCT 60 258/58/50/2905/029/
THN K LYR N-NE LGT HZ/ 8/005 51006 10058 20050
 
10 A.M.  
Weather: Thin broken cirrus, few stratocumulus
distant NW, patches dense cirrus S-W, light haze
Temperature: 68F, Dew point: 46F, Wind: SSW at 11 kts,
Wind: Direction variability ESE to SW
Sea-level pressure: 30.28 inches Hg, falling
Visibility: 75 miles  
BHO SA 1455 250 –BKN 75 255/68/46/2011/028/
FEW SC DSNT NW PTCHS DENS CI S-W  LGT HZ WND 12V22/
8/502 58003
 
1 P.M.  
Weather: Broken cirrus, few stratocumulus distant NW,
patches dense cirrus S-W, halo, light haze
Temperature: 73F, Dew point: 44F, Wind: S at 11 kts,
Wind: Direction variability ESE to SW
Sea-level pressure: 30.25 inches Hg, falling
Visibility: 75 miles
6-hourly max. temp: 74F
BHO SA 1755 E250 BKN 75 243/73/44/1811/025/
FEW SC DSNT NW PTCHS DENS CI S-W LGT HZ HALO WND 12V23/
8/502 58012 10074 20058
 
WEATHER SUMMARY FOR TUESDAY, JUNE 16
 
TEMPERATURE (DEGREES F)
MAX.....64    NORMAL.....76
MIN.....51    NORMAL.....56
MEAN....58    NORMAL.....66
 
DEPARTURE FROM 30-YEAR NORMAL...........-8
TOTAL DEPARTURE FOR THE MONTH..........-57 [-3.8 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............7  DEPARTURE.......+5
TOTAL HEATING UNITS FOR THE MONTH............79  DEPARTURE......+25
TOTAL HEATING UNITS FOR THE SEASON.........6200  DEPARTURE.....-151
TOTAL HEATING UNITS LAST SEASON TO DATE....5939  DIFFERENCE....+261
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............22 NNE AT 1:17 P.M.
                   AEROVANE..............19 NNE AT 1:18 P.M.  
                   ASOS..................20 NE  AT 1:18 P.M.    
                   DAVIS.................19 NNE AT 1:44 P.M.       
FASTEST MILE FOR YESTERDAY...............11 NE  AT 1:53 P.M. *
MAXIMUM 2-MINUTE ASOS AVERAGE............14 NE  AT 1:19 P.M.      
MAXIMUM 2-MINUTE DAVIS AVERAGE...........14 NE  AT 1:48 P.M.     
AVERAGE WIND SPEED AND DIRECTION....... 6.5 NNE
                   ASOS.................7.0
                   DAVIS................6.8 NE [042 DEG]
* Last of several occurrences...
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M...Trace  DEPARTURE....-0.14
                         ASOS..............0.00
TOTAL PRECIPITATION FOR  JUNE..............1.16  DEPARTURE....-0.94
                         ASOS..............1.14 
TOTAL PRECIPITATION FOR THE YEAR..........19.66  DEPARTURE....-4.18
                         ASOS.............20.63 
 
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 wind recording 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    AERO 25 MPH SSW
6/2  76/53/65/+3/T/525/58          28 S      AERO 24 MPH S
6/3  69/54/62/0/T/254/28           23 SSW    
6/4  73/53/63/0/0/327/36           22 SSE     
6/5  64/51/58/-5/0.05/000/00       21 NE
6/6  73/51/62/-1/0.01/428/47       25 SSE
6/7  79/56/68/+4/0/583/64          28 W      AERO 24 MPH W
6/8  73/57/65/+1/0/529/58          18 ENE
6/9  59/51/55/-9/0.10/000/00       27 E
6/10 59/52/56/-8/0.00/000/00       21 NE     AERO 18 MPH NE
6/11 57/52/55/-10/0.17/000/00      23 NNE    AERO 21 MPH NE
6/12 70/53/62/-3/0.43/119/13       30 SSE    AERO 29 MPH SSE
6/13 75/59/67/+2/T/796/87          23 NNE
6/14 63/54/59/-6/0.34/101/11       20 E
6/15 60/52/56/-10/0.06/027/03      20 NE
6/16 64/51/58/-8/T/.../..          22 NNE    AERO 19 MPH NNE
 
6/17 our morning low temp: 50F; the normal low is now 56F
 
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 17
HIGH 93F IN 1894
LOW 44F IN 1920
PRECIP 2.79 INS 2001 (Sub-Tropical storm ALLISON)
PEAK GUST 55e MPH S IN 1977
 
RECORDS FOR JUNE 18
HIGH 93F IN 1929,1994
LOW 39F IN 1920
PRECIP 3.36 INS 1998
PEAK GUST 48e MPH W IN 1943
 
TODAY'S REPORT PREPARED BY: Stephanie Radner