BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JULY 11, 2007   
ALL TIMES ARE IN EASTERN STANDARD TIME
 
WARMER AND MUCH MORE HUMID AIR RETURNS TODAY
ON INCREASING SOUTH WINDS
 
Increasingly gusty south winds to over 30 MPH at times
are transporting warmer and more humid air ahead of an
approaching cold front today.  Dew points have reached 
the lower 70's with air temperatures rising into the
low to mid-80's.  The overnight low temperature as
recorded this morning was a warm and humid 70 degrees.   
 
Today's observations:
 
7 A.M.   
Weather: Low stratus overcast, light fog      
Temperature: 72F, Dew point: 71F, Wind: S at 11 kts 
Sea-level pressure: 29.88 inches Hg, steady
Visibility: 21/2 miles light fog, NE-E 3 miles     
6-hour min temp: 70F     
24-hour rainfall: 0.00 inch 
BHO SA 1155 E3 OVC 21/2F 118/72/71/1711/988/ VSBY NE-E 3 CIG/VSBY 
INCRSNG PST HR/ 8/6// 53001 10072 20070 
 
10 A.M.   
Weather: Broken low stratus clouds and some high clouds   
Temperature: 78F, Dew point: 73F, Wind: S at 11 kts 
Sea-level pressure: 29.87 inches Hg, falling 
Visibility: 10 miles, hazy 
BHO SA 1455 E12 BKN 250 BKN 10 115/78/73/1711/987/ CIG RGD BKN 
V OVC HZY/ WND 15v21/ 8/601 58003
 
1 P.M.   
Weather:Scattered moderate cumulus, high thin overcast     
Temperature: 83F, Dew point: 71F, Wind: S at 15G23 kts 
Sea-level pressure: 29.80 inches Hg, falling 
Visibility: 25 miles, light haze   
BHO SA 1755 24 SCT 150 SCT 220 SCT 250 –BKN 300 OVC 25 
091/83/71/1715G23/980/ MOD CU ALQDS FEW ACSL SW-NW CC OVHD 
LGHT HZ WND 14v20/ 8/241 58024 10084 20072 
  
WEATHER SUMMARY FOR TUESDAY, JULY 10
 
TEMPERATURE (DEGREES F)
MAX.....80    NORMAL.....81 
MIN.....62    NORMAL.....62
MEAN....71    NORMAL.....71
DEPARTURE FROM 30-YEAR NORMAL........ 0
TOTAL DEPARTURE FOR THE MONTH.......-15  (-1.7 DEGREES/DAY)
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............27 S   AT 7:25 P.M.     
                   AEROVANE...............26 S   AT 7:25 P.M.    
                   ASOS...................N/A  #
                   DAVIS..................23 S   AT 7:26 P.M.          
FASTEST MILE FOR YESTERDAY................19 S   AT 7:26 P.M.       
MAXIMUM 2-MINUTE ASOS AVERAGE.............N/A  # 
MAXIMUM 2-MINUTE DAVIS AVERAGE............15 SSE AT 9:09 P.M.           
AVERAGE WIND SPEED AND DIRECTION........ 7.8 S
                   ASOS...................N/A  #
                   DAVIS................ 6.6 E [100 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.....-0.12
                         ASOS..............0.00  
TOTAL PRECIPITATION FOR JULY...............0.98  DEPARTURE.....-0.24 
                         ASOS..............0.90    
TOTAL PRECIPITATION FOR THE YEAR..........27.96  DEPARTURE.....+1.07 
                   ASOS FOR YEAR..........27.31    
 
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/-9/0.02/649/71/28 W      
7/2  73/50/62/-8/0/841/92/   29 WNW 
7/3  75/53/64/-6/0/839/92/   23 NW 
7/4  78/58/68/-2/0.09/465/51/45 SSE 
7/5  80/61/71/ 0/0.24/383/42/38 SSE TSTM  
7/6  83/62/73/+2/0.01/.../../46 WNW TSTM  
7/7  81/60/71/0/0/.../../    32 WSW   
7/8  90/62/76/+5/0.41/.../../36 NW Aero 33 MPH TSTM 
7/9  86/61/74/+3/0.20/354/39 27 NNE TSTM
7/10 80/62/71/0/0/680/75     27 S
 
7/11 morning low temp. 70 deg; normal now 62 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 11
HIGH 98F IN 1911
LOW 49F IN 1890
PRECIP 1.87 INS IN 1959
WIND 53 MPH NW IN 1988
 
RECORDS FOR JULY 12
HIGH 97F IN 1943
LOW 48F IN 1945
PRECIP 1.43 INS IN 1975
WIND 48e MPH SSW IN 1944
 
TODAY'S REPORT PREPARED By: Robert Skilling