BLUE HILL METEOROLOGICAL OBSERVATORY 
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JUNE 26, 2011
ALL TIMES ARE IN EASTERN STANDARD TIME
 
SUN FINALLY BROKE THROUGH THE CLOUDS YESTERDAY
RAINFALL ASSOCIATED WITH DISSIPATING THUNDERSTORM
LAST EVENING AMOUNTS TO ONE QUARTER OF AN INCH
DAY NO.6 IN THE FOG THIS MORNING WITH DENSE FOG
 
The sun finally made an appearance here at
the summit yesterday afternoon for the first time
since it began hiding behind the clouds on the
first full day of summer, last Wednesday, June 22. 
Last evening a period of rain amounting to a quarter
of inch brought a few rumbles of thunder around 10 PM
EDT. This morning dense fog again enveloped the summit
before lifting followed by some sunshine by mid-morning.  
 
Today's observations:
 
7 A.M.  
Weather: Sky obscured by heavy fog
Temperature: 64F, Dew point: 64F; Wind: SSE at 3 kts,
Wind: Light 
Sea-level pressure: 29.94 inches Hg, rising
Visibility: 1/16 mile, heavy fog  
6-hour min. temp: 61F
6-hour precip: 0.00
24-hour precip: 0.26 inch
BHO SA 1155 W2 X 1/16F 138/64/64/1503/994/
8//// 53018 MANUAL 70026 ASOS 70026 10064 20061
 
10 A.M.
Weather: Broken stratocumulus, few moderate cumuloform tops,
broken altocumulus mostly thin 
Temperature: 71F, Dew point: 65F; Wind: SSW at 4 kts,
Wind: Light
Sea-level pressure: 29.95 inches Hg, falling
Visibility: 20 miles
BHO SA 1455 E16 BKN 80 BKN 20 142/71/65/2004/995/
80 BKN LYR MSTLY THN FEW SC/MDT CUFRM TOPS HAZY WND LGT/
8/530 50004
 
WEATHER SUMMARY FOR SATURDAY, JUNE 25
 
TEMPERATURE (DEGREES F)
MAX.....68    NORMAL.....78
MIN.....54    NORMAL.....58
MEAN....61    NORMAL.....68
 
DEPARTURE FROM 30-YEAR NORMAL....................-7
TOTAL DEPARTURE FOR THE MONTH...................-23 [-1.1 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............4    DEPARTURE.........+3
TOTAL HEATING UNITS FOR THE MONTH............86    DEPARTURE........+17
TOTAL HEATING UNITS FOR THE SEASON.........6239    DEPARTURE.......-127
TOTAL HEATING UNITS LAST SEASON TO DATE....5678    DIFFERENCE......+561
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............18 NNW AT  7:53 A.M. 
                   AEROVANE...............21 NNW AT  7:55 A.M. 
                   ASOS...................17 NNW AT  7:58 A.M. 
                   DAVIS..................20 NNW AT  7:32 A.M. 
THE FASTEST MILE FOR YESTERDAY............15 SE  AT 10:07 P.M.  
MAXIMUM 2-MINUTE ASOS AVERAGE.............13 SE  AT 10:33 P.M. 
MAXIMUM 2-MINUTE DAVIS AVERAGE............13 NNW AT  7:33 A.M. 
AVERAGE WIND SPEED AND DIRECTION........ 6.8 N
                   ASOS..................6.9
                   DAVIS.................6.5 NNE [020 deg]
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.26  DEPARTURE........+0.13
                         ASOS..............0.26  
TOTAL PRECIPITATION FOR THE MONTH..........5.12  DEPARTURE........+1.84
                         ASOS..............5.04
TOTAL PRECIPITATION FOR THE YEAR..........27.31  DEPARTURE........+2.29
                        ASOS..............27.87**
**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/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 62/57/60/-8/..../000/00         33 ENE  AERO 36 MPH ENE
6/24 60/56/58/-10/..../000/00        28 NE
6/25 68/54/61/-7/..../.../..         18 NNW
 
6/26 our low temp. since midnight, 59F; the normal low is 59F
 
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 26
HIGH 96F IN 1952
LOW 45F IN 1986
PRECIP 1.52 INS IN 1945
PEAK GUST 48 MPH N IN 1998
 
RECORDS FOR JUNE 27
HIGH 93F IN 1999, 2007
LOW 46F IN 1897
PRECIP 1.72 INS IN 1938
PEAK GUST 55e N IN 1945
 
TODAY'S REPORT PREPARED BY: Robert Skilling