BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, OCTOBER 18, 2007 
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.   
Weather: Sky obscured with fog, sun occasionally visible 
Temperature: 58F, Dew point: 58F, Wind: SW at 08 kts
Sea-level pressure: 30.00 inches Hg, falling 
Visibility: 0 miles, fog 
6-hour min temp: 57F
24-hour precipitation: 0.00 
BHO SA 1155 W1 X 0F 158/58/58/2206/000/ SUN OCNLY VSBL/ 
8//// 56004 10058 20057
 
10 A.M.   
Weather: Overcast stratus 
Temperature: 61F, Dew point: 60F, Wind: SSW at 06 kts 
Sea-level pressure: 29.99 inches Hg, falling
Visibility: 3 miles, fog  
BHO SA 1455 E5 OVC 3F 155/61/60/2006/999/ 
BRGT SPTS IOVC OVHD/ 8/6// 58003
 
1 P.M.   
Weather: Scattered stratus, thin broken cirrus
Temperature: 73F, Dew point: 61F, Wind: SSE at 06 kts 
Sea-level pressure: 29.94 inches Hg, falling
Visibility: 8 miles, hazy  
6-hour max temp: 73F
BHO SA 1755 65 SCT 200 –BKN 8 140/73/61/1606/994/ 
PTCHS DNS CI HAZY/ 8/602 56015 10073 20058
 
WEATHER SUMMARY FOR WEDNESDAY, OCTOBER 17
 
TEMPERATURE (DEGREES F)
MAX.....68    NORMAL.....60 
MIN.....41    NORMAL.....42
MEAN....52    NORMAL.....51
DEPARTURE FROM 30-YEAR NORMAL.........+ 4 
TOTAL DEPARTURE FOR THE MONTH.........+83 [+4.7 DEGREES/DAY]  
 

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............20 SW  AT 11:17 P.M.         
                   AEROVANE............ 18 NW  AT 11:27 P.M.          
                   ASOS.................18 WSW AT 11:17 P.M.          
                   DAVIS................20 WSW AT 11:17 P.M.        
FASTEST MILE FOR YESTERDAY..............14 SSW AT  7:06 P.M.                   
MAXIMUM 2-MINUTE ASOS AVERAGE...........14 SSW AT  8:10 P.M.          
MAXIMUM 2-MINUTE DAVIS AVERAGE..........16 SSW AT  9:49 P.M.  
AVERAGE WIND SPEED AND DIRECTION...... 7.7 SSW   
                   ASOS............... 7.8   
                   DAVIS.............. 8.0 SW  [233 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.....-1.15  
                         ASOS..............1.25    
TOTAL PRECIPITATION FOR THE YEAR..........34.11  DEPARTURE.....-5.87
                         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/-2/0/426/64     29 WNW   
10/16 61/43/52/+1/0/650/98     25 NW 
10/17 68/41/55/+4/0/462/70     20 SW
 
10/18 morning low temp. 57F; 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 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
 
RECORDS FOR OCTOBER 19
HIGH 81F IN 1945
LOW 21F IN 1922
PRECIP 3.64 INCHES IN 1932
SNOWFALL 1.0 INCHES IN 1972
PEAK GUST 66 MPH SSW IN 1967
 
TODAY'S REPORT PREPARED By: Stephanie Radner