BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, OCTOBER 17, 2007 
ALL TIMES ARE IN EASTERN STANDARD TIME
 
 
MOSTLY SUNNY DESPITE HIGH CLOUDS TODAY
LIGHT WINDS
 
High thin cloudiness prevails today with sunshine and 
very light winds.  In fact, for October, this has been
a very light wind month with the average speed through
the first half only about 9.8 MPH. 
 
Today's observations:
 
7 A.M.   
Weather: Broken altocumulus, dense cirrus, overcast cirrus,
thin spots and breaks in overcast  
Temperature: 46F, Dew point: 35F, Wind: W at 08 kts
Sea-level pressure: 30.16 inches Hg, steady 
Visibility: 75 miles 
6-hour min temp: 41F
24-hour precipitation: 0.00 
BHO SA 1155 E150 BKN 200 BKN 250 OVC 75 215/46/35/2708/016/
DENSE CI ALQDS THN SPTS/BINOVC K LYR ALG HRZN NE-E/ 
8/072 51005 10046 20041
 
10 A.M.   
Weather: High thin cirrus overcast, thin with breaks 
Temperature: 56F, Dew point: 40F, Wind: WSW estimated at 02 kts 
Sea-level pressure: 30.16 inches Hg, falling
Visibility: 50 miles, NW 70, N-NE 35  
BHO SA 1455 220 SCT 250 –BKN 300 –OVC 50 213/56/40/E2402/016/ 
FEW AC S-WNW BINOVC THN K LYR ALG HRZN S-W DRK K LYR ALG HRZN NW-E
VSBY NW 70 N-NE 35 WND LGT/ 8/031 58002 
 
1 P.M.   
Weather: Scattered cirrus, cirrostratus 
Temperature: 64F, Dew point: 44F, Wind: SW at 07 kts 
Sea-level pressure: 30.10 inches Hg, falling
Visibility: 45 miles, NW 60 
6-hour max temp: 65F
BHO SA 1755 250 SCT 45 193/64/44/2207/010/ 
K LYR ALNG HRZN N-ENE VSBY NW 60/ 8/009 58020 10065 20046
   
WEATHER SUMMARY FOR TUESDAY, OCTOBER 16
 
TEMPERATURE (DEGREES F)
MAX.....61    NORMAL.....60 
MIN.....43    NORMAL.....43
MEAN....52    NORMAL.....51
DEPARTURE FROM 30-YEAR NORMAL.........+ 1 
TOTAL DEPARTURE FOR THE MONTH.........+79 [+4.7 DEGREES/DAY]  
 

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............25 NW  AT  8:41 A.M.         
                   AEROVANE............ 25 NW  AT  8:41 A.M.          
                   ASOS.................23 NW  AT  8:41 A.M.          
                   DAVIS................25 W   AT  7:53 A.M.        
FASTEST MILE FOR YESTERDAY..............18 WNW AT  8:20 A.M.                   
MAXIMUM 2-MINUTE ASOS AVERAGE...........18 WNW AT  8:21 A.M.          
MAXIMUM 2-MINUTE DAVIS AVERAGE..........20 WNW AT  8:21 A.M.  
AVERAGE WIND SPEED AND DIRECTION...... 9.3 WNW   
                   ASOS............... 8.5   
                   DAVIS.............. 9.6 WNW  [300 deg]  
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE.....-0.14
                         ASOS..............0.00 
TOTAL PRECIPITATION FOR THE MONTH..........1.23  DEPARTURE.....-1.01  
                         ASOS..............1.25    
TOTAL PRECIPITATION FOR THE YEAR..........34.11  DEPARTURE.....-5.73
                         ASOS.............33.37  
 
PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 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
 
10/1  67/49/58/+1/0/592/84     18 S 
10/2  72/50/61/+5/0/323/46     20 SSE
10/3  73/61/67/+11/0/077/11    23 SSE
10/4  84/65/75/+19/0/425/61    21 SSW
10/5  86/61/74/+19/0/618/89    21 SSW 
10/6  83/62/73/+18/0/526/76    23 WSW
10/7  71/52/61/+7/0.01/110/16  29 NNE 
10/8  58/52/55/+1/0.49/000/00  21 S
10/9  59/50/55/+1/0.10/580/85  29 NNW
10/10 57/50/54/0/0.09/000/00   20 ESE
10/11 58/55/57/+4/0.37/000/00  33 ENE TSTM late evening 
10/12 62/42/52/-1/0.18/135/20  42 W   Aero 43 MPH W 
10/13 59/37/48/-4/0/665/99     25 WNW
10/14 59/42/51/-1/0/629/94     32 W 
10/15 62/38/50/-2/0/.../..     29 WNW   
10/16 61/43/52/+1/0/650/98     25 NW
 
10/17 morning low temp. 41F; normal low now 42F
 
NEW DAILY RECORDS FOR OCTOBER 2007:
 
10/4 - RECORD HIGH TEMPERATURE 84F; PREVIOUS 83F IN 1898 and 1959.
     - EQUALED RECORD HIGH MINIMUM TEMPERATURE OF 65F; ALSO IN 1927. 
10/5 - RECORD HIGH TEMPERATURE 86F; PREVIOUS 85F IN 1922
10/6 - EQUALED RECORD HIGH TEMPERATURE 83F; ALSO IN 1990.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR OCTOBER 17
HIGH 86F IN 1947
LOW 25F IN 1886
PRECIP 1.87 INCHES IN 1989
SNOWFALL TRACE IN 1970
PEAK GUST 55 MPH NE IN 1964
 
RECORDS FOR OCTOBER 18
HIGH 82F IN 1908
LOW 26F IN 1939
PRECIP 2.79 INCHES IN 1975
SNOWFALL TRACE IN 1972
PEAK GUST 66 MPH S IN 1967
 
TODAY'S REPORT PREPARED By: Robert Skilling/Stephanie Radner