BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, JUNE 16, 2009   
ALL TIMES ARE IN EASTERN STANDARD TIME
 
SUNSHINE AFTER EARLY MORNING LOW CLOUDS
JUNE TEMPS. 3.5 BELOW AVERAGE TO DATE
SUNSHINE AT 32% OF POSSIBLE
 
Low clouds broke and began clearing at
mid-morning with full sunshine before noon.
The only exception to over one week of over-
cast or foggy weather in the early morning
was last Saturday, June 13th, when we observed
a clear sky. All the cloudiness this month
has dropped June sunshine to 32% of possible after
just 3% yesterday. Temperatures ranging from
52 to 60 yesterday resulted in a daily average
10 degrees cooler than normal bringing the June 
average down to 3.5 degrees below normal. 
 
Today's observations:
 
7 A.M.  
Weather: Low overcast stratus, very light drizzle occurring
Temperature: 52F, Dew point: 51F, Wind: NE at 6 kts
Sea-level pressure: 30.26 inches Hg, rising
Visibility: 5 miles, WNW-N 3 miles, NE-ENE 35 miles 
6-hour minimum temp: 51F
6-hour rainfall: trace
24-hour rainfall: 0.06 inch
BHO SA 1155 E3 OVC 5L-F 247/52/51/0506/026/
VSBY WNW-N 3 NE-ENE 35 VSBY INCRSNG PST HR
PCPN VRY LGT/ 8/6// 53020 MANUAL 600/
MANUAL 70006 ASOS 70004 10052 20051
 
10 A.M.  
Weather: Broken stratocumulus  
Temperature: 58F, Dew point: 50F, Wind: NNE at 8 kts,
Wind: Direction variability N to ENE 
Sea-level pressure: 30.29 inches Hg, rising
Visibility: 45 miles  
BHO SA 1455 E22 BKN 45 256/58/50/0308/029/
WND 35V06/ 8/500 51009 MANUAL 6000/
 
1 P.M.  
Weather: Clear, stratocumulus all quadrants,
stratus layer distant offshore east-northeast
through east    
Temperature: 63F, Dew point: 49F, Wind: NNE at 9 kts,
Wind: Direction variability N to ENE 
Sea-level pressure: 30.27 inches Hg, falling
Visibility: 60 miles, 70 miles to the northwest   
6-hourly max. temp: 63F
6-hourly rainfall: trace
BHO SA 1755 CLR 60 250/63/49/0309/027/
SC ALQDS STRA LYR DSNT OFFSHR ENE-E
VSBY NW 70 WND 35V06/ 8/500 57005 10063 20052
 
WEATHER SUMMARY FOR MONDAY, JUNE 15
 
TEMPERATURE (DEGREES F)
MAX.....60    NORMAL.....75
MIN.....52    NORMAL.....56
MEAN....56    NORMAL.....66
 
DEPARTURE FROM 30-YEAR NORMAL..........-10
TOTAL DEPARTURE FOR THE MONTH..........-49 [-3.5 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............9  DEPARTURE.......+7
TOTAL HEATING UNITS FOR THE MONTH............72  DEPARTURE......+20
TOTAL HEATING UNITS FOR THE SEASON.........6193  DEPARTURE.....-156
TOTAL HEATING UNITS LAST SEASON TO DATE....5934  DIFFERENCE....+259
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............20 NE  AT 5:31 P.M. *  
                   AEROVANE..............17 NE  AT 2:53 P.M.  
                   ASOS..................17 NNE AT 2:54 P.M.    
                   DAVIS.................17 NE  AT 2:53 P.M.       
FASTEST MILE FOR YESTERDAY...............11 NE  AT 3:04 P.M.  
MAXIMUM 2-MINUTE ASOS AVERAGE............13 NE  AT 3:05 P.M.      
MAXIMUM 2-MINUTE DAVIS AVERAGE...........13 NE  AT 2:55 P.M.     
AVERAGE WIND SPEED AND DIRECTION....... 6.6 NE
                   ASOS.................6.7
                   DAVIS................6.6 ENE [060 DEG]
* Last of several occurrences...
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.06  DEPARTURE....-0.08
                         ASOS..............0.04
TOTAL PRECIPITATION FOR  JUNE..............1.16  DEPARTURE....-0.80
                         ASOS..............1.14 
TOTAL PRECIPITATION FOR THE YEAR..........19.66  DEPARTURE....-4.04
                         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/.../000/00        21 NE     AERO 18 MPH NE
6/11 57/52/55/-10/.../000/00       23 NNE    AERO 21 MPH NE
6/12 70/53/62/-3/.../119/13        30 SSE    AERO 29 MPH SSE
6/13 75/59/67/+2/0/796/87          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 our morning low temp: 51F; 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 16
HIGH 92F IN 1891, 1967
LOW 44F IN 1926
PRECIP 2.17 INS IN 1931
PEAK GUST 55 MPH W IN 1958
 
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
 
TODAY'S REPORT PREPARED BY: Robert Skilling