BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, AUGUST 28, 2009
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:

7 A.M.   
Weather: Broken altocumulus, broken cirrus
Temperature: 60F, Dew point: 55F, Wind: N at 13 kts
Sea-level pressure: 30.20 inches Hg, rising
Visibility: 70 miles    
6-hour minimum temp: 55F
BHO SA 1155 E140 BKN 250 BKN 70 227/60/55/0113/020/ 
8/031 53013 10061 20059

10 A.M. 
Weather: Broken cirrostratus, overcast cirrus,
few stratocumulus SE-SW, altocumulus E-S-W, 
patches dense cirrus
Temperature: 68F, Dew point: 55F, Wind: NNE at 10 kts
Sea-level pressure: 30.21 inches Hg, rising
Visibility: 60 miles, light haze
BHO SA 1455 E220 BKN 250 BKN 60 229/68/55/0210/021/ 
FEW SC SE-SW AC E-S-W PTCHS DENS CI LGT HZ/ 8/532 51002

1 P.M. 
Weather: Scattered altocumulus, broken cirrostratus, 
overcast cirrus, few stratocumulus all quadrants, 
patches dense cirrus
Temperature: 70F, Dew point: 56F, Wind: NNE at 10 kts
Sea-level pressure: 30.19 inches Hg, falling 
Visibility: 50 miles, light haze
6-hourly max. temp: 71F  
BHO SA 1755 140 SCT E220 BKN 250 OVC 50 223/70/56/0210/019/ 
FEW SC ALQDS PTCHS DENS CI LGT HZ/ 8/557 58006 10071 20060

WEATHER SUMMARY FOR THURSDAY, AUGUST 27

TEMPERATURE (DEGREES F)
MAX.....75    NORMAL.....77
MIN.....56    NORMAL.....59 
MEAN....66    NORMAL.....68
 
DEPARTURE FROM 30-YEAR AVERAGE...........-2
TOTAL DEPARTURE FOR THE MONTH...........+99 [+3.5 DEGREES/DAY]

HEATING DEGREE DATA WILL RESUME IN SEPTEMBER 

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............29 NW  AT 12:02 A.M. 
                   AEROVANE..............28 NW  AT 12:02 A.M.
                   ASOS..................26 NNW AT 12:02 A.M. 
                   DAVIS.................30 NW  AT 12:02 A.M.
FASTEST MILE FOR YESTERDAY...............19 NW  AT 12:02 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE............20 NNW AT 12:03 A.M.     
MAXIMUM 2-MINUTE DAVIS AVERAGE...........22 NW  AT 12:03 A.M.   
AVERAGE WIND SPEED AND DIRECTION.........7.4 WNW
                   ASOS..................7.2
                   DAVIS.................8.1 WNW [299 DEG]

 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00   DEPARTURE....-0.14
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........1.71   DEPARTURE....-1.79
                         ASOS..............1.72
TOTAL PRECIPITATION FOR THE YEAR..........32.97   DEPARTURE....+0.06
                         ASOS.............34.10 

PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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

8/1  83/63/73/+1/0/823/95     18 SSE
8/2  77/64/71/-1/T/104/12     25 SSE
8/3  84/67/76/+4/0/638/74     17 SW 
8/4  83/66/75/+3/0/714/83     23 S
8/5  86/67/77/+5/T/378/44     27 SSW  TSTM 
8/6  76/61/69/-3/0/564/66     18 SSE
8/7  79/58/69/-2/0/836/98     32 W
8/8  74/55/65/-6/0/791/93     21 WNW
8/9  76/59/68/-3/T/178/21     25 SSE  
8/10 87/66/77/+6/0.12/584/69  27 W    TSTM  
8/11 84/66/75/+4/0.54/684/81  25 NE   TSTM  
8/12 67/63/65/-6/T/000/00     18 N
8/13 66/60/63/-8/0.18/042/05  23 NNE
8/14 83/58/71/+1/0/762/91     16 S
8/15 88/66/77/+7/0/810/97     18 S 
8/16 90/68/79/+9/0/749/90     22 S
8/17 91/69/80/+10/0/754/91    21 WSW 
8/18 91/72/82/+12/0/776/94    29 SSW 
8/19 89/71/80/+10/0/717/87    23 SW
8/20 83/70/77/+8/0.34/558/68  21 SSE  TSTM
8/21 88/72/80/+11/T/385/47    40 S    AERO 39 MPH S
8/22 86/71/79/+10/0.03/629/77 28 S 
8/23 86/69/78/+9/0.50/367/45  25 S    
8/24 84/67/76/+7/0/.../..     30 N  
8/25 82/65/74/+6/0/.../..     21 S
8/26 84/65/75/+7/0/.../..     32 W
8/27 75/56/66/-2/0/.../..     29 NW

8/28 our morning low temp: 59F; the normal low is now 59F

NEW DAILY RECORDS FOR AUGUST 2009 TO DATE...

8/19: RECORD HIGH MINIMUM TEMPERATURE 71F; 
      equals record previously set in 2002
8/23: RECORD HIGH MINIMUM TEMPERATURE 69F; 
      equals record previously set in 1906 
  
DAILY EXTREMES

Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):

RECORDS FOR AUGUST 28
HIGH 95F IN 1948
LOW 43F IN 1885
PRECIP 1.80 INCHES IN 1922
PEAK GUST 87 MPH SSE 1971

RECORDS FOR AUGUST 29
HIGH 95F IN 1953
LOW 41F IN 1982
PRECIP 2.88 INCHES IN 1962
PEAK GUST 70e MPH S 1949

TODAY'S REPORT PREPARED BY: Stephanie Radner