BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, SEPTEMBER 5, 2007    
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.   
Weather: Thin broken cirrus  
Temperature: 57F, Dew point: 42F, Wind: NW at 10 kts
Sea-level pressure: 30.13 inches Hg, rising
Visibility: 75 miles
6-hour min temp: 53F
24-hour rainfall: 0.00 
BHO SA 1155 250 –BKN 75 203/57/42/3110/013/ 8/001 51021 10058 20053
 
10 A.M.   
Weather: Scattered cirrus 
Temperature: 70F, Dew point: 42F, Wind: NW at 8 kts  
Wind: variable WSW-N 
Sea-level pressure: 30.16 inches Hg, rising
Visibility: 75 miles 
BHO SA 1455 250 SCT 75 213/70/42/3208/016/ PTCHS DNS CI WND 24V01/ 
8/002 51010
 
1 P.M.   
Weather: Thin broken cirrus, few distant cumulus N, E-SSE, W     
Temperature: 71F, Dew point: 47F, Wind: NE at 7 kts  
Wind: variable N-E
Sea-level pressure: 30.14 inches Hg, falling
Visibility: 75 miles  
6-hour max. temp: 73F   
BHO SA 1755 250 -BKN 75 208/71/47/0507/014/ FEW SML CU DSNT N AND E-SSE 
AND W WND 01V09 WND GRDLY VEERING PST HR/ 8/101 56005 10073 20057
 
WEATHER SUMMARY FOR TUESDAY, SEPTEMBER 4
 
TEMPERATURE (DEGREES F)
MAX.....76    NORMAL.....75 
MIN.....61    NORMAL.....57
MEAN....69    NORMAL.....66
DEPARTURE FROM 30-YEAR NORMAL.........+3
TOTAL DEPARTURE FOR THE MONTH........ +8  [+1.8 deg/day] 
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............28 NW  AT 12:18 P.M.    
                   AEROVANE...............26 NW  AT 12:18 P.M.    
                   ASOS...................N/A  #
                   DAVIS..................27 WNW AT 12:18 P.M. 
FASTEST MILE FOR YESTERDAY............... 17 NW  AT 12:20 P.M.        
MAXIMUM 2-MINUTE ASOS AVERAGE.............N/A  # 
MAXIMUM 2-MINUTE DAVIS AVERAGE............19 NW  AT 12:22 P.M. 
AVERAGE WIND SPEED AND DIRECTION......... 10.7 WNW 
                   ASOS...................N/A  #
                   DAVIS..................11.2 WNW [288 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....0.00  DEPARTURE.....-0.13
                         ASOS..............0.00 
TOTAL PRECIPITATION FOR THE MONTH..........0.00  DEPARTURE.....-0.52  
                         ASOS..............0.00    
TOTAL PRECIPITATION FOR THE YEAR..........30.99  DEPARTURE.....-3.00
                         ASOS.............30.23    
 
PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER 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
9/1  79/57/68/+1/0/790/100    25 WNW  
9/2  78/51/65/-1/0/787/100    22 S 
9/3  85/57/71/+5/0/760/97     31 SSW AERO 28 MPH SSW 
9/4  76/61/69/+3/0/.../..     28 NW  AERO 26 MPH NW
 
9/5  morning low temp. of 53F; normal low now 57F
 
NEW DAILY RECORDS FOR SEPTEMBER 2007: 
 
None to date 
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR SEPTEMBER 5
HIGH 90F IN 1971
LOW 45F IN 1906
PRECIP 1.37 INCHES IN 1907
PEAK GUST 46 MPH NW IN 1994
 
RECORDS FOR SEPTEMBER 6
HIGH 92F IN 1900
LOW 39F IN 1888
PRECIP 3.19 INCHES IN 1890
PEAK GUST 78e MPH SE IN 1979 (TROPICAL STORM DAVID)
 
TODAY'S REPORT PREPARED By: Stephanie Radner