BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, AUGUST 21, 2008     
ALL TIMES ARE IN EASTERN STANDARD TIME UNLESS NOTED  
 
Today's observations:
 
8 A.M. EDT
Weather: Clear, few dense cirrus N-E-S
Temperature: 59F, Dew point: 50F,  Wind: WNW at 7 kts 
Sea-level pressure: 30.28 inches Hg, rising 
Visibility: 75 miles 
6-hourly minimum temperature: 55F 
24-hourly rainfall: 0.00 inches
BHO SA 1155 CLR 75 255/59/50/3007/028/ FEW DENS CI N-E-S/ 
8/002 51015 10059 20055
 
11 A.M. EDT
Weather: Clear, few cirrus NNW-N and E-SE
Temperature: 70F, Dew point: 53F, Wind: W at 6 kts,
Wind: light and variable 
Sea-level pressure: 30.29 inches Hg, rising
Visibility: 70 miles  
BHO SA 1455 CLR 70 258/70/53/2806/029/ FEW CI NNW-N AND E-SE 
WND LGT AND VRB/ 8/001 50003
 
2 P.M. EDT
Weather: Clear, few stratocumulus distant SW-NW
Temperature: 76F, Dew point: 53F, Wind: SW at 8 kts,
Wind: direction variability SE to NW  
Sea-level pressure: 30.27 inches Hg, falling
Visibility: 70 miles  
6-hourly max. temp. 77F
BHO SA 1755 CLR 70 252/76/53/2308/027/ FEW SC DSNT SW-NW 
WND 14V31/ 8/500 58006 10077 20059
 
WEATHER SUMMARY FOR WEDNSDAY, AUGUST 20
 
TEMPERATURE (DEGREES F)
MAX.....72    NORMAL.....78
MIN.....50    NORMAL.....61
MEAN....61    NORMAL.....69
 
DEPARTURE FROM 30-YEAR NORMAL.............-8
TOTAL DEPARTURE FOR THE MONTH............-41 [-2.3 DEGREES/DAY]
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............28 WNW AT 10:01 A.M.    
                   AEROVANE.............28 WNW AT 10:01 A.M.       
                   ASOS.................29 NW  AT 10:01 A.M.     
                   DAVIS................29 W   AT 10:00 A.M.          
FASTEST MILE FOR YESTERDAY..............18 WNW AT 10:10 A.M.      
MAXIMUM 2-MINUTE ASOS AVERAGE...........18 NNW AT 10:10 A.M.         
MAXIMUM 2-MINUTE DAVIS AVERAGE..........20 WNW AT 10:09 A.M.       
                   AVERAGE............. 11.6 WNW
                   ASOS................ 10.5 
                   DAVIS................12.2 WNW [ 290 deg]  
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00   DEPARTURE......-0.13  
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........4.50   DEPARTURE......+1.93 
                         ASOS..............4.55   
TOTAL PRECIPITATION FOR THE YEAR..........35.43   DEPARTURE......+3.45  
                         ASOS.............37.98 #
#  Includes erroneous ASOS precipitation data on 2/13/08.
 
PRELIMINARY CLIMATE SUMMARY FOR AUGUST 2008 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane recording wind system gust when significant
TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
 
8/1  85/66/76/+4/0.00/719/83     16 WSW    
8/2  80/65/73/+1/0.80/346/40     21 NW    TSTM 
8/3  81/61/71/-1/0.56/422/49     52 NW    Aero 55 MPH NW TSTM
8/4  79/60/70/-2/0.01/731/85     25 WNW  
8/5  72/63/68/-4/T/377/44        21 NE  
8/6  64/60/62/-10/0.55/000/00    31 ESE  
8/7  72/61/67/-4/0.41/009/01     21 SW    TSTM
8/8  77/59/68/-3/0.47/442/52     23 ENE   TSTM
8/9  78/59/69/-2/0.00/534/63     16 SSE
8/10 80/61/71/0/0.08/474/56      24 ESE   TSTM 
8/11 67/61/64/-7/0.06/025/03     25 E 
8/12 72/58/65/-6/0.18/134/16     21 NNW   TSTM 
8/13 79/59/69/-2/0.00/778/93     18 WSW
8/14 78/63/71/+1/T/334/40        21 NNW   
8/15 79/62/71/+1/1.32/125/15     18 SSW   TSTM
8/16 79/61/70/0/0.01/647/78      23 WSW
8/17 80/59/70/0/0.00/787/95      28 WSW 
8/18 85/64/75/+5/0.00/.../..     28 SSW 
8/19 78/54/66/-4/0.05/.../..     29 WNW   TSTM
8/20 72/50/61/-8/0/.../..        28 WNW
 
8/21 morning low temp. of 55F; our normal low is now 60F
      
NEW DAILY RECORDS FOR AUGUST
 
8/3 - PEAK GUST OF 52 MPH FROM THE NW IS NEW RECORD FOR THE
      DATE; PREVIOUS RECORD 41 MPH NE IN 1964
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR AUGUST 21
HIGH 92F IN 1937, 1995
LOW 47F IN 1982
PRECIP 2.84 INCHES IN 1888
PEAK GUST 54 MPH WSW 2004
 
RECORDS FOR AUGUST 22
HIGH 90F IN 1939
LOW 42F IN 1894
PRECIP 2.28 INCHES IN 1935
PEAK GUST 44 MPH SSW 1987
 
TODAY'S REPORT PREPARED By: Stephanie Radner