BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JUNE 10, 2009   
ALL TIMES ARE IN EASTERN STANDARD TIME
 
LOW STRATUS CLOUDS AND VERY COOL TEMPERATURES
CONTINUE TODAY BUT WITH NO PRECIPITATION
ONE YEAR AGO TODAY A HIGH OF 98 DEGREES!
 
Yesterday's rainfall was a disappointing 0.10
inch including after light rain in the morning
and drizzle last evening.  Unseasonably cool
temperatures in the 50's persisted throughout
the day which averaged 9 degrees below normal.  
 
What a difference a year makes!  June 10, 2008,
was the last day of a 4-day heat wave.  High
readings in the 90's began on June 7th and
concluded with a scorching 98F on the 10th.
That reading came within one degree of the all-time
June record of 99F on June 4, 1919. 
 
Today's observations:
 
7 A.M.  
Weather: Obscurement with heavy fog
Temperature: 53F, Dew point: 53F, Wind: N at 3 kts,
Sea-level pressure: 29.99 inches Hg, rising
Visibility: 1/4 mile, variable 1/8 to 1/2  
6-hour minimum temp: 52F
6-hour rainfall: 0.00
24-hour rainfall: 0.10 in.   
BHO SA 1155 W2 1/4VF 154/53/53/3503/999/ VSBY 1/8V1/2/ 8////
53004 MANUAL 70010 ASOS 70009 10053 20052
 
10 A.M.  
Weather: Low overcast stratus, thin fog 
Temperature: 56F, Dew point: 55F, Wind: NNW at 5 kts,
Sea-level pressure: 30.01 inches Hg, steady
Visibility: 2 miles, slowly increasing 
BHO SA 1455 E4 OVC 2F 164/55/54/3405/001/
VSBY INCRSNG/ 8/6// 51010 
 
1 P.M.  
Weather: Low overcast stratus 
Temperature: 56F, Dew point: 53F, Wind: ENE at 7 kts,
Sea-level pressure: 30.01 inches Hg, rising
Visibility: 10 miles, north 12, northeast 20 and
south through northwest 8 miles, thin fog  
6-hourly max. temp: 58F
BHO SA 1755 E9 OVC 10 163/56/53/0607/001/
VSBY N 12 NE 20 S-W 8 THN FG/
8/6// 55001 10058 20053
 
WEATHER SUMMARY FOR TUESDAY, JUNE 9
 
TEMPERATURE (DEGREES F)
MAX.....59    NORMAL.....74
MIN.....51    NORMAL.....54
MEAN....55    NORMAL.....64
 
DEPARTURE FROM 30-YEAR NORMAL...........-9
TOTAL DEPARTURE FOR THE MONTH..........-14 [-1.8 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............10  DEPARTURE.......+7
TOTAL HEATING UNITS FOR THE MONTH............35  DEPARTURE.......-1
TOTAL HEATING UNITS FOR THE SEASON.........6156  DEPARTURE.....-177
TOTAL HEATING UNITS LAST SEASON TO DATE....5928  DIFFERENCE....+228
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............27 E  AT  1:27 P.M. 
                   AEROVANE..............22 E  AT  1:27 P.M. *
                   ASOS..................24 E  AT 12:57 P.M.  
                   DAVIS.................23 E  AT 12:57 P.M.   
FASTEST MILE FOR YESTERDAY...............17 E  AT  4:03 P.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE............16 E  AT  4:06 P.M.   
MAXIMUM 2-MINUTE DAVIS AVERAGE...........17 E  AT 12:52 P.M.   
AVERAGE WIND SPEED AND DIRECTION........8.6 E  
                   ASOS.................8.4 
                   DAVIS................8.3 E [100 DEG]
* last of several occurrences
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.10  DEPARTURE....-0.03
                         ASOS..............0.09
TOTAL PRECIPITATION FOR  JUNE..............0.16  DEPARTURE....-1.01
                         ASOS..............0.14 
TOTAL PRECIPITATION FOR THE YEAR..........18.66  DEPARTURE....-4.25
                         ASOS.............19.69 
 
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 our morning low temp: 52F; the normal low is 54F
 
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 10
HIGH 98F IN 2008
LOW 42F IN 1913,1920
PRECIP 2.51 INCHES IN 1931
PEAK GUST 60e MPH NW IN 1941
 
RECORDS FOR JUNE 11
HIGH 92F IN 1973,1984,1997
LOW 40F IN 1972
PRECIP 2.66 INS 1922
PEAK GUST 43e MPH S IN 1945
 
TODAY'S REPORT PREPARED BY: Robert Skilling