BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, AUGUST 12, 2007   
ALL TIMES ARE IN EASTERN STANDARD TIME
 
WARMER AND SOMEWHAT MORE MOIST AIR HAS RETURNED
VISIBILITY DOWN FROM 80 MILES SATURDAY MORNING
TO 20 MILES THIS MORNING BUT 50 MILES BY NOON
 
After a very cool day for early August last Friday 
(a high of only 63 degrees)and a 52-degree low temperature 
yesterday morning, the maximum temperature on Saturday 
rose to 83 degrees, 20 degrees warmer than the day before.  
Also, it was three degrees above the average maximum 
temperature for August 11th.
 
After the spectacular visibility of at least 80 miles on 
Saturday today's view has dropped to 20 miles increasing to 
50 miles by late morning with the sky showing mostly high
thin cloudiness.
 
Today's observations:
 
7 A.M.   
Weather: High thin scattered cirrus   
Temperature: 68F, Dew point: 60F, Wind: NW at 06 kts
Sea-level pressure: 30.05 inches Hg, rising 
Visibility: 20 miles, distant thin fog and haze 
6-hour min temp: 64 deg. F
24-hour precip: 0.00 inch    
BHO SA 1155 250 –SCT 300 –SCT 20 176/68/60/3106/005/ 
DSNT THN FH ALQDS/ 8/001 51009 10068 20064
 
10 A.M.   
Weather: High thin broken to thin overcast cirrus, few dense cirrus,
Cu forming 
Temperature: 78F, Dew point: 60F, Wind: WSW at 05 kts 
Sea-level pressure: 30.05 inches Hg, steady
Visibility: 50 miles  
BHO SA 1455 250 –BKN 300 -OVC 50 176/78/60/2505/005/
CUFRA/CU FRMG ALQDS PTCHS DENS CI BINOVC OVHD/ 8/102 53000
 
WEATHER SUMMARY FOR SATURDAY, AUGUST 11
 
TEMPERATURE (DEGREES F)
MAX.....83    NORMAL.....80 
MIN.....52    NORMAL.....62
MEAN....68    NORMAL.....71
DEPARTURE FROM 30-YEAR NORMAL........ -3
TOTAL DEPARTURE FOR THE MONTH........+18  (+1.4 DEGREES/DAY)
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............21 WNW AT 6:19 P.M. * 
                   AEROVANE...............18 WNW AT 6:17 P.M. *  
                   ASOS...................N/A  #
                   DAVIS..................20 W   AT 2:33  P.M.
FASTEST MILE FOR YESTERDAY................15 NW  AT 4:19  A.M.  
MAXIMUM 2-MINUTE ASOS AVERAGE.............N/A  # 
MAXIMUM 2-MINUTE DAVIS AVERAGE............16 WNW AT 3:31 P.M.
AVERAGE WIND SPEED AND DIRECTION..........9.0 NW  
                   ASOS...................N/A  #
                   DAVIS..................9.5 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..........0.46  DEPARTURE.....-0.95  
                         ASOS..............0.43    
TOTAL PRECIPITATION FOR THE YEAR..........30.82  DEPARTURE.....+0.00 
                   ASOS FOR YEAR..........30.10    
 
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/+4/0/851/98     20 NNE   *
8/2  92/68/80/+8/0/823/95     21 S     
8/3  92/70/81/+9/0/760/88     28 SSW
8/4  89/71/80/+8/0/827/96     29 WSW  
8/5  80/62/71/-1/0/.../..     23 SSE 
8/6  77/61/69/-3/0.05/129/15  36 SSE Aero 34 MPH SSE TSTM  
8/7  82/67/75/+4/0.12/.../..  15 SSE 
8/8  88/70/79/+8/0.10/.../..  36 S
8/9  75/60/68/-3/0/.../..     32 NW
8/10 63/53/58/-13/0.19/.../.. 16 SSW
8/11 83/52/68/-3/0/.../..     21 WNW
 
8/12 morning low temp. 64 deg; normal low now 62 deg.  
     
* Sunshine data corrected from previously reported values.
 
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 12
HIGH 99F IN 1944
LOW 48F IN 1930
PRECIP 1.89 INCHES IN 1979
PEAK GUST 50 MPH NE IN 1983
 
RECORDS FOR AUGUST 13
HIGH 98F IN 1944, 2002
LOW 47F IN 1902, 1957
PRECIP 2.92 INCHES IN 1989
PEAK GUST 52 MPH SSE IN 1963
 
TODAY'S REPORT PREPARED By: Robert Skilling