BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, JUNE 29, 2009   
ALL TIMES ARE IN EASTERN STANDARD TIME
 
ANOTHER CLOUDY DAY YESTERDAY
JUNE SUNSHINE AT 28% THRU 28 DAYS
SATURDAY AFTERNOON THUNDERSTORM
 
Low stratus clouds prevailed as an overcast
all day yesterday, so another day without
sunshine adds up to 11 for the month with
just 28% of possible sunshine for June. 
The record low is 25% in 1903 and 2nd least
is 36% in 1998.
Saturday afternoon's thunderstorm brought
lots of thunder and lightning to our southwest
and west but only 0.20 inch of rainfall.   
 
Today's observations:
 
7 A.M.  
Weather: Obscured with heavy fog, moderate rain
Temperature: 62F, Dew point: 62F, Wind: SW at 8 kts
Sea-level pressure: 29.47 inches Hg, falling slightly
Visibility: 1/16 of a mile
6-hour minimum temp: 59F
24-hour rainfall: 0.38 inch
BHO SA 1155 W2 X 1/16RF 979/62/62/2308/947/
8//// 55000 ASOS 60035 MANUAL 6XXX/ ASOS 70036
MANUAL 70038 10062 20059
 
10 A.M.  
Weather: Overcast stratus, higher clouds of altocumulus
lenticularis and dense cirrus visible with small
break in overcast southwest, thin fog  
Temperature: 67F, Dew point: 66F, Wind: S at 6 kts
Sea-level pressure: 29.47 inches Hg, falling slightly
Visibility: 6 miles, SE 10, SW 8, W-NW 3, N-NE 8
3-hourly rainfall: 0.12 inch
BHO SA 1455 E4 OVC 6F 978/67/66/1906/947/ CIG RGD
STFRA DRFTG BLO SMT ALQDS HIER CLDS VSB/AC/DENS CI
SML BINOVC SW SUN OCNL DMLY VSB VSBY SE 10 SW 8 W-NW 3
N-NE 8 RE35/ 8/642 57001 ASOS 60014 MANUAL 6012/
 
1 P.M.  
Weather: Scattered stratocumulus, cumulus, moderate tops,
altocumulus, some lenticular and chaotic altocumulus.
sky scattered variable to broken  
Temperature: 73F, Dew point: 66F, Wind: SSE at 10 kts,
Wind: Direction variability ESE to SSW
Sea-level pressure: 29.47 inches Hg, falling
Visibility: 15 miles, 20 miles west-northwest, hazy 
6-hourly max. temp. 73F
6-hourly precip: 0.12 in.
BHO SA 1755 14 SCT 75 SCT 130 SCT 15 978/73/66/1610/947/
SCT V BKN SC/CU MDT TOPS FEW ACSL AC CHAOTIC SKY VSBY WNW 20
HAZY ALQDS WND 12V20 RE1655/ 8/809 50000 ASOS 60014 MANUAL 
6012/ 10073 20062 
 
WEATHER SUMMARY FOR SUNDAY, JUNE 28
 
TEMPERATURE (DEGREES F)
MAX.....64    NORMAL.....79
MIN.....58    NORMAL.....59
MEAN....61    NORMAL.....69
 
DEPARTURE FROM 30-YEAR NORMAL...........-8
TOTAL DEPARTURE FOR THE MONTH.........-107 [-4.0 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............4  DEPARTURE.......+3
TOTAL HEATING UNITS FOR THE MONTH...........114  DEPARTURE......+42
TOTAL HEATING UNITS FOR THE SEASON.........6235  DEPARTURE.....-134
TOTAL HEATING UNITS LAST SEASON TO DATE....5942  DIFFERENCE....+293
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............21 N   AT 12:21 A.M. 
                   AEROVANE..............17 N   AT 12:21 A.M.  
                   ASOS..................18 NNE AT 11:06 A.M. 
                   DAVIS.................20 N   AT 12-1  A.M.
FASTEST MILE FOR YESTERDAY...............11 NNE AT 12:43 A.M. *
MAXIMUM 2-MINUTE ASOS AVERAGE............12 NW  AT 11:57 P.M.     
MAXIMUM 2-MINUTE DAVIS AVERAGE...........13 N   AT 12:22 A.M.   
AVERAGE WIND SPEED AND DIRECTION........7.1 N 
                   ASOS.................7.8
                   DAVIS................7.3 N  [350]
* last of several occurrences...
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.38  DEPARTURE....+0.25
                         ASOS..............0.36
TOTAL PRECIPITATION FOR  JUNE..............4.96  DEPARTURE....+1.29
                         ASOS..............4.92 
TOTAL PRECIPITATION FOR THE YEAR..........23.46  DEPARTURE....-1.95
                         ASOS.............24.47 
 
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    
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/568/62          22 NNE  
6/17 74/50/62/-4/0/807/88          28 S      AERO 24 MPH S
6/18 65/52/59/-7/0.44/000/00       35 ESE
6/19 70/61/66/-1/0.47/000/00       33 SE     AERO 31 MPH SE
6/20 76/60/68/+1/0/266/29          21 NNE
6/21 61/57/59/-8/0.55/000/00       44 N      AERO 42 MPH N
6/22 60/58/59/-8/1.26/000/00       42 NNE    AERO 39 MPH NNE 
6/23 64/57/61/-7/0.33/000/00       38 N      AERO 33 MPH N
6/24 62/55/59/-9/0.12/000/00       27 N     
6/25 74/58/66/-2/0.02/156/17       21 SSW  
6/26 79/62/71/+3/0.03/339/37       30 WSW
6/27 78/59/69/0/.../513/56         23 N
6/28 64/58/61/-8/.../000/00        21 N
 
6/29 our morning low temp: 59F; the normal low is now 59F
 
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 29
HIGH 93F IN 1933
LOW 42F IN 1919
PRECIP 1.60 INS IN 1889
PEAK GUST 49 MPH S IN 1957
 
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
 
TODAY'S REPORT PREPARED BY: Robert Skilling