BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, AUGUST 6, 2007   
ALL TIMES ARE IN EASTERN STANDARD TIME
 
RAIN SHOWERS AND HIGH HUMIDITY ARRIVE TODAY
YESTERDAY FEATURED LOTS OF SUNSHINE WITH 
A VERY BLUE SKY AND DEWPOINTS DOWN INTO 
THE 40'S FOR A TIME DURING THE AFTERNOON
 
The increasing humidity today sent the dewpoint 
temperature rising to 70 degrees by early this
afternoon.  Light showers began early this after-
noon and 0.04 was the total through 2 p.m. EDT.
 
Yesterday was very beautiful and sunny and also
very dry for early August day with lots of bright sunshine 
from a very blue sky. Excellent visibility up 
to 80 miles was observed from the summit. Our dewpoints 
dropped to the mid-40's for a time during the 
afternoon!
 
Today's observations:
 
7 A.M.   
Weather: Broken altocumulus stratiformus translucidus perlucidus,
Stratocumulus/stratus visible distant SSW-NNW 
Temperature: 67F, Dew point: 63F, Wind: SE at 14 kts
Wind: gradually backing 
Sea-level pressure: 29.95 inches Hg, falling 
Visibility: 30 miles 
6-hour min temp: 61 deg. F     
BHO SA 1155 E130 BKN 30 141/67/63/1314/995/
SC/STRA ALG HRZN DSNT SSW-W-NNW 
LGT DSNT THN F WND GRDLY BACKING/
8/530 58010 10067 20061
 
10 A.M.   
Weather: Scattered stratocumulus, broken altocumulus  
Temperature: 76F, Dew point: 65F, Wind: S at 16G23 kts 
Wind: Variability SE-SSW
Sea-level pressure: 29.90 inches Hg, falling
Visibility: 25 miles except WSW-NW, hazy
BHO SA 1455 20 SCT E25 BKN 70 BKN 25 124/76/65/1716G23/990/ 
20 SCT V BKN SC VSBY WSW-NW 20 HAZY VSBY DCRSNG WND 13V20/ 
8/530 58017
 
1 P.M.
Weather: Low overcast stratus fractus, nimbostratus,
Very light rain shower
Temperature: 73F, Dew point: 70F, Wind: S at 11 kts
Wind: a gust to 24 kts during the past hour
Sea-level pressure: 29.83 ins. and falling 
Visibility: 6 miles, light rain shower and thin fog,
visibility SE 7, SW 8 
6-hour max. temp. 77F
6-hour precip: 0.04 inch
BHO SA 1755 E15 BKN 25 OVC 6RW-F 103/73/70/1811/983/ 
CIG RGD VSBY SE 7 SW 8 RB UKN PCPN VRY LGT WND GST 24 
KTS PST HR/ 8/72/ 56021 ASOS 60004 MANUAL 6004/
10077 20067  
 
WEATHER SUMMARY FOR SUNDAY, AUGUST 5
 
TEMPERATURE (DEGREES F)
MAX.....80    NORMAL.....81 
MIN.....62    NORMAL.....62
MEAN....71    NORMAL.....72
DEPARTURE FROM 30-YEAR NORMAL.........-1
TOTAL DEPARTURE FOR THE MONTH........+28  (+5.4 DEGREES/DAY)
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............23  NW  AT  1:04 A.M.   
                   AEROVANE...............21  SSE AT 11:31 P.M. *         
                   ASOS...................N/A  #
                   DAVIS..................23  SE  AT 10:27 P.M.              
FASTEST MILE FOR YESTERDAY................15  SSE AT 11:40 P.M. *           
MAXIMUM 2-MINUTE ASOS AVERAGE.............N/A  # 
MAXIMUM 2-MINUTE DAVIS AVERAGE............17  SSE AT N/A               
AVERAGE WIND SPEED AND DIRECTION......... 9.2 NW
                   ASOS...................N/A  #
                   DAVIS................. 9.6 NW [310 deg]  
* last of several occurrences...
 
# ASOS WINDS SWITCHED OFF BY NWS 6/6, IT IS NOT KNOWN WHEN 
  THAT DATA WILL RESUME
 
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..........0.00  DEPARTURE.....-0.62 
                         ASOS..............0.00    
TOTAL PRECIPITATION FOR THE YEAR..........30.36  DEPARTURE.....+0.33
                   ASOS FOR YEAR..........29.67    
 
PRELIMINARY CLIMATE SUMMARY FOR AUGUST 2007......CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
 
AERO: Aerovane recording wind system when significant
TSTM: Thunderstorm day
....: Data not yet available
 
8/1  84/67/76/+4/0/782/94     20 NNE   
8/2  92/68/80/+8/0/.../..     21 S     
8/3  92/70/81/+9/0/.../..     28 SSW
8/4  89/71/80/+8/0/.../..     29 WSW  
8/5  80/62/71/-1/0/.../..     23 SSE
 
8/6  morning low temp. 61 deg; normal low now 62 deg.
 
     
NEW DAILY RECORDS FOR AUGUST 2007: 
 
None to date
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR AUGUST 6
HIGH 95F IN 1931
LOW 48F IN 1934
PRECIP 1.47 INCHES IN 1995
PEAK GUST 44e MPH SSW IN 1940
 
RECORDS FOR AUGUST 7
HIGH 95F IN 1924
LOW 51F IN 2004
PRECIP 3.32 INCHES IN 1926
PEAK GUST 51 MPH NE 1975
 
TODAY'S REPORT PREPARED By: Robert Skilling and Eli Melaas