BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, JULY 3, 2007   
ALL TIMES ARE IN EASTERN STANDARD TIME
 
COOLER TEMPERATURE TREND CONTINUES
 
Once again, cooler temperatures started the day with a below-normal low
of 53 degrees and drier air conditions. Moderate cumulus began forming 
in the late morning, about as much as the previous two days. Winds are 
variable and from the WNW.  
 
Today's observations:
 
7 A.M.   
Weather: Clear, few distant clouds WSW-WNW
Temperature: 59F, Dew point: 49F, Wind: WNW at 9 kts 
Sea-level pressure: 30.19 inches Hg, rising
Visibility: 75 miles
6-hour min temp. 53F    
24-hour precip: 0.00 
BHO SA 1155 CLR 75 222/59/49/3009/019/ FEW CU DSNT NNW ALG 
HRZN FEW ACSL WSW-WNW FEW CI DSNT SW/ 8/141 51009 10059 20053

10 A.M. 
Weather: Clear, cumulus forming 
Temperature: 71F, Dew point: 47F, Wind: NW at 7 kts
Wind: Direction variable S-N
Sea-level pressure: 30.19 inches Hg, steady 
Visibility: 70 miles     
BHO SA 1455 CLR 70 223/71/47/3107/019/ CU FRMG FEW MOD W-N 
FEW THN CI S-WNW/ WND 26V36/ 8/101 50001
 
1 P.M. 
Weather:  
Temperature: 74F, Dew point: 47F, Wind: NW at 7 kts
Wind: Direction variable W-NE
Sea-level pressure: 30.17 inches Hg, falling 
Visibility: 60 miles
6-hour max temp. 74F
BHO SA 1755 60 SCT 70 SCT 60 217/74/47/3107/017/ CU XCPT 
NE-E MOD CU/ WND 27V03/ 8/260 50006 10074 20059
  
WEATHER SUMMARY FOR MONDAY, JULY 2
 
TEMPERATURE (DEGREES F)
MAX.....73    NORMAL.....79 
MIN.....50    NORMAL.....60
MEAN....62    NORMAL.....70
DEPARTURE FROM 30-YEAR NORMAL............. -8
TOTAL DEPARTURE FOR THE MONTH............ -17 [-8.7 per day]
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............29  WNW  AT 3:24 P.M.     
                   AEROVANE.............26  WNW  AT 3:17 P.M.   
                   ASOS.................N/A  #
                   DAVIS................29  WNW AT 3:54 P.M.        
FASTEST MILE FOR YESTERDAY..............22  WNW   AT 3:23 P.M.     
MAXIMUM 2-MINUTE ASOS AVERAGE...........N/A  # 
MAXIMUM 2-MINUTE DAVIS AVERAGE..........22   WNW  AT 3:25 P.M.          
AVERAGE WIND SPEED AND DIRECTION........10.0 WNW 
                   ASOS.................N/A  #
                   DAVIS................12.2 WNW [288 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....0.00  DEPARTURE.....-0.13
                         ASOS..............0.00  
TOTAL PRECIPITATION FOR JULY...............0.02  DEPARTURE.....-0.24 
                         ASOS..............0.02    
TOTAL PRECIPITATION FOR THE YEAR..........27.00  DEPARTURE.....+1.07 
                   ASOS FOR YEAR..........26.43    
 
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  morning low temp. 53 deg; normal now 60 deg.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):

RECORDS FOR JULY 3
HIGH 99F IN 1911
LOW 47F IN 1914
PRECIP 1.36 IN 1985
PEAK GUST 52 MPH NW IN 1963
 
RECORDS FOR JULY 4
HIGH 98F IN 1911, 1919, 1949
LOW 48F IN 1914
PRECIP 1.78 IN 1950
PEAK GUST 50e MPH WNW IN 1949
 
TODAY'S REPORT PREPARED By: Eli Melaas and Robert Skilling