BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, JULY 12, 2007   
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.   
Weather: Thin broken cirrus      
Temperature: 69F, Dew point: 57F, Wind: NW at 16G21 kts 
Sea-level pressure: 29.76 inches Hg, rising
Visibility: 65 miles
6-hour min temp: 65F     
24-hour rainfall: 0.01 inch 
BHO SA 1155 250 -BKN 65 079/69/57/3216G21/976/ 
FEW SC DSNT W-NW AND N WND 26V01/ 8/504 51013 
ASOS 70001 MANUAL 70001 10073 20065
 
10 A.M.   
Weather: Scattered cirrus, few stratocumulus SW-NNE
Temperature: 73F, Dew point: 59F, Wind: WNW at 10 kts 
Sea-level pressure: 29.80 inches Hg, rising 
Visibility: 75 miles
BHO SA 1455 250 SCT 75 092/73/59/3010/980/ 
FEW SC SW-NNE FEW CI UNC WND 26V33/ 8/501 51013
 
1 P.M.   
Weather:Scattered cumulus and cirrus
Temperature: 79F, Dew point: 57F, Wind: W at 05 kts 
Sea-level pressure: 29.79 inches Hg, falling 
Visibility: 80 miles   
BHO SA 1755 55 SCT 250 SCT 80 088/79/57/2705/979/ 
8/101 58004 10079 20069
 
 
WEATHER SUMMARY FOR WEDNESDAY, JULY 11
 
TEMPERATURE (DEGREES F)
MAX.....84    NORMAL.....81 
MIN.....70    NORMAL.....62
MEAN....77    NORMAL.....72
DEPARTURE FROM 30-YEAR NORMAL........+5
TOTAL DEPARTURE FOR THE MONTH.......-10  (-1.1 DEGREES/DAY)
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............32 S   AT  1:31 P.M.     
                   AEROVANE...............31 SE  AT 12:57 P.M.    
                   ASOS...................N/A  #
                   DAVIS..................33 SE  AT 12:57 P.M.          
FASTEST MILE FOR YESTERDAY................24 S   AT  1:29 P.M.       
MAXIMUM 2-MINUTE ASOS AVERAGE.............N/A  # 
MAXIMUM 2-MINUTE DAVIS AVERAGE............22 SE  AT  4:29 P.M.           
AVERAGE WIND SPEED AND DIRECTION........ 13.7 SSE
                   ASOS...................N/A  #
                   DAVIS................ 12.1 SSE [162 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....0.01  DEPARTURE.....-0.11
                         ASOS..............0.01  
TOTAL PRECIPITATION FOR JULY...............0.99  DEPARTURE.....-0.35 
                         ASOS..............0.91    
TOTAL PRECIPITATION FOR THE YEAR..........27.97  DEPARTURE.....+0.96 
                   ASOS FOR YEAR..........27.32    
 
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/ 0/0.25/383/42/38 SSE TSTM   ** 
7/6  83/62/73/+2/0.01/482/53/46 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 84/70/77/+5/T/.../..    32 S
 
7/12 morning low temp. 65 deg; normal now 62 deg.  
 
** precip on the 5th was erroneously reported 
   as 0.24; it has been corrected to 0.25 in.
 
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 12
HIGH 97F IN 1943
LOW 48F IN 1945
PRECIP 1.43 INS IN 1975
WIND 48e MPH SSW IN 1944
 
RECORDS FOR JULY 13
HIGH 95F IN 1894
LOW 52F IN 1888, 1895, 1939, 1973
PRECIP 3.54 INS IN 1996
WIND 55 MPH SE IN 1996

TODAY'S REPORT PREPARED By: Stephanie Radner