BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JULY 6, 2007   
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Yesterday's high and low temperature matched the normal 
climatological values exactly. The strong July sunshine has 
resulted in building cumulus as of early afternoon. We've had 
a beautiful view of a thunderstorm as it grew SE of the 
observatory and we expect more storms before the evening is over. 
Temperatures have aleady hit 81 at noon and drier air is making 
its way in on W winds, cutting the haze and improving visibility.  
Just before midnight yesterday we did receive .12 inches of rain 
as a weak thunderstorm skirted the area.
 
Today's observations:
 
7 A.M.   
Weather: Thin fog, scattered altocumulus, a few cirrus 
Temperature: 68F, Dew point: 67F, Wind: W at 10 kts 
Sea-level pressure: 29.80 inches Hg, steady
Visibility: 4 miles
6-hour min temp: 66F    
24-hour precip: 0.12 
BHO SA 1155 3 SCT 120 SCT 200 SCT 4F 092/68/67/2610/980/ 
THN F STRFRA SCT AC ALQDS FEW CI UNC OVHD 8/111/ 55001 
ASOS 70011 MANUAL 70012 10068 20066
 
10 A.M. 
Weather: Cumulus and towering cumulus, a few altocumulus
Temperature: 79F, Dew point: 66F, Wind: W at 7 kts
Sea-level pressure: 29.80 inches Hg, rising 
Visibility: 2.5 miles     
BHO SA 1455 50 SCT 120 10 093/79/66/2707/980 
MED CU ALQDS TCU E CU CAST E-S-SW FEW AC/ 8/210/ 53001
 
1 P.M. 
Weather: Towering cumulus and a few cirrus
Temperature: 79F, Dew point: 60F, Wind: W at 12 kts
Sea-level pressure: 29.76 inches Hg, falling   
Visibility: 25 miles 
6-hour max temp: 82F
BHO SA 1755 55 SCT 200 SCT 25 079/79/60/2612/976/ 
TCU ALQDS FEW CI UNC OVHD 8/301 58014 10082 20066 
 
WEATHER SUMMARY FOR THURSDAY, JULY 5
 
TEMPERATURE (DEGREES F)
MAX.....80    NORMAL.....80 
MIN.....61    NORMAL.....61
MEAN....71    NORMAL.....71
DEPARTURE FROM 30-YEAR NORMAL............. 0
TOTAL DEPARTURE FOR THE MONTH............ -25 [-5 per day]
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............38  SSE   AT 1:08  A.M.     
                   AEROVANE.............36  SSE   AT 12:40 A.M.   
                   ASOS.................N/A  #
                   DAVIS................40  SSE   AT 12:40 A.M.        
FASTEST MILE FOR YESTERDAY..............30  SSE   AT 1:13  A.M.     
MAXIMUM 2-MINUTE ASOS AVERAGE...........N/A  # 
MAXIMUM 2-MINUTE DAVIS AVERAGE..........30  SSE   AT 12:40 A.M.          
AVERAGE WIND SPEED AND DIRECTION........15.4 S 
                   ASOS.................N/A  #
                   DAVIS................14.7 S [180 deg]  
 
# 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....0.12  DEPARTURE......0.00
                         ASOS..............0.11  
TOTAL PRECIPITATION FOR JULY...............0.36  DEPARTURE.....-0.26 
                         ASOS..............0.33    
TOTAL PRECIPITATION FOR THE YEAR..........27.35  DEPARTURE.....+1.05 
                   ASOS FOR YEAR..........26.74    
 
PRELIMINARY CLIMATE SUMMARY FOR JULY 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
 
7/1  70/52/61/-9/0.02/649/71      
7/2  73/50/62/-8/0/841/92
7/3  75/53/64/-6/0/839/92
7/4  78/58/68/-2/0.09/465/51
7/5  80/61/71/ 0/0.24/383/42
 
7/6  morning low temp. 66 deg; normal low 61 deg.
 
NEW DAILY RECORDS FOR JULY 2007: 
 
None to date
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR JULY 6
HIGH 98F IN 1911
LOW 47F IN 1979
PRECIP 1.43 INCHES IN 2005
PEAK GUST 56e MPH NNW IN 1942, 56 MPH WNW IN 1999
 
RECORDS FOR JULY 7
HIGH 97F IN 1908,1993
LOW 48F IN 1902
PRECIP 2.11 INCHES IN 1966
PEAK GUST 55 MPH NW IN 1989

TODAY'S REPORT PREPARED By: Nate Magee