BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, AUGUST 7, 2007   
ALL TIMES ARE IN EASTERN STANDARD TIME
 
DENSE EARLY MORNING FOG BURNED OFF LEAVING US WITH 
JUST SOME HIGH THIN CLOUDINESS AND CUMULUS INLAND
 
Temperatures have reached the lower 80's with a light 
seabreeze during the early afternoon. The airmass is 
rather humid with dewpoints generally between 66 
and 68 degrees today.  
 
Yesterday afternoon's thunderstorm passed by to the north 
with cloud-to-ground lightning just 4 to 5 miles away. Only a 
trace of rain fell with the storm.
 
Today's observations:
 
7 A.M.   
Weather: Obscurement, heavy fog 
Temperature: 68F, Dew point: 68F, Wind: NNE at 04 kts
Sea-level pressure: 29.91 inches Hg, rising 
Visibility: 1/16 mile  
6-hour min temp: 67 deg. F
24-hour precip: 0.05 inch     
BHO SA 1155 W1 X 1/16F 127/68/68/0304/991/ 8//// 53013 
ASOS 70004 MANUAL 70005 10071 20067
 
10 A.M.   
Weather: Broken high thin clouds, stratus N-E   
Temperature: 74F, Dew point: 68F, Wind: NE at 07 kts 
Wind: Variability N-E
Sea-level pressure: 29.94 inches Hg, rising
Visibility: 5 miles, fog and haze,  4 N, 3 NE 
BHO SA 1455 200 SCT 220 –THN 250 –BKN 5FH 139/74/68/0407/994/ 
STFRA/FG N-E CU/MDT CU FRMG S-NW CC AND FEW PTCHS DNS CI ALQDS 
VSBY N 4 NE 3 SW 8 WND 01V08/ 8/209 51012 
 
1 P.M.
Weather: High thin overcast, cumulus, moderate cumulus distant SSW-NW  
Temperature: 81F, Dew point: 66F, Wind: NNE at 05 kts
Sea-level pressure: 29.93 ins. and steady 
Visibility: 12 miles, hazy
6-hour max. temp: 81 deg. F 
BHO SA 1755 250 –SCT 300 –OVC 15 135/81/66/0205/993/ 
FEW CU DSNT SSE-S AND CU/MDT CU SSW-NW HAZY WND LGT/ 
8/201 55004 10081 20068 
  
WEATHER SUMMARY FOR MONDAY, AUGUST 6
 
TEMPERATURE (DEGREES F)
MAX.....77    NORMAL.....81 
MIN.....61    NORMAL.....62
MEAN....69    NORMAL.....69
DEPARTURE FROM 30-YEAR NORMAL.........-3
TOTAL DEPARTURE FOR THE MONTH........+25  (+4.0 DEGREES/DAY)
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............36  SSE AT 2:28 P.M. *   
                   AEROVANE...............34  SSE AT 2:28 P.M. *         
                   ASOS...................N/A  #
                   DAVIS..................33  SE  AT 2:01 P.M.               
FASTEST MILE FOR YESTERDAY................28  SSE AT 2:04 P.M.           
MAXIMUM 2-MINUTE ASOS AVERAGE.............N/A  # 
MAXIMUM 2-MINUTE DAVIS AVERAGE............24  SSE AT 2:34 P.M.                
AVERAGE WIND SPEED AND DIRECTION.........14.1 SSE
                   ASOS...................N/A  #
                   DAVIS.................13.5 S [170 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....0.05  DEPARTURE.....-0.08
                         ASOS..............0.04 
TOTAL PRECIPITATION FOR THE MONTH..........0.05  DEPARTURE.....-0.70 
                         ASOS..............0.04    
TOTAL PRECIPITATION FOR THE YEAR..........30.41  DEPARTURE.....+0.25
                   ASOS FOR YEAR..........29.71    
 
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/+8/0/823/95     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  morning low temp. 67 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 7
HIGH 95F IN 1924
LOW 51F IN 2004
PRECIP 3.32 INCHES IN 1926
PEAK GUST 51 MPH NE 1975
 
RECORDS FOR AUGUST 8
HIGH 93F IN 1909,1949
LOW 47F IN 1903
PRECIP 3.08 INCHES IN 1976
PEAK GUST 45 MPH WNW IN 1958
 
TODAY'S REPORT PREPARED By: Robert Skilling and Eli Melaas