BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, SEPTEMBER 16, 2008    
ALL TIMES ARE IN EASTERN STANDARD TIME UNLESS NOTED 
 
WINDIEST DAY SINCE MAY 26 YESTERDAY
CLOUDY AND MUCH COOLER WEATHER TODAY
 
Strong winds veering south through southwest to west
were the result of the remnant remains of Hurricane Ike. 
Winds for the day averaged 20.8 MPH for our windiest day
since 21.1 MPH on May 26.  Peak gusts reached 45 MPH WSW
on our 420C and Aerovane wind systems and 46 MPH WSW on
ASOS and Davis systems.
The center of a strong low pressure system, the remnant
of Hurricane Ike, moved down the St. Lawrence Valley Tuesday
morning causing strong winds but no rain here. The lowest 
barometric  pressure corrected to sea level reached 29.52 
inches (ASOS) at 4:31 a.m.  
 
Today's observations:
 
8 A.M. EDT
Weather:  Scattered stratocumulus, overcast with altocumulus
Temperature: 58F, Dew point: 49F,  Wind: NNW at 8 kts
Sea-level pressure: 30.14 inches Hg, rising
Visibility: 80 miles  
6-hourly minimum temperature: 54F
24-hourly rainfall: 0.00 inch
BHO SA 1155 50 SCT E95 BKN 120 OVC 80 207/58/49/3308/014
CU/SC ALG HRZN DSNT W-WNW AND DSNT E ALG HRZN NMRS BINOVC ALQDS/
8/870 51020 10058 20054
 
11 A.M. EDT
Weather: Overcast stratocumulus, few cumulus distant NNW-NNE
small breaks in overcast, bright spots in overcast 
Temperature: 63F, Dew point: 53F, Wind: NE at 7 kts
Sea-level pressure: 30.17 inches Hg, falling
Visibility: 75 miles
BHO SA 1455 E50 OVC 75 218/63/53/0507/017/
FEW CU DSNT NNW-NNE HIER CLDS VSB SML BINOVC
BRGHT SPTS IOVC/ 8/8// 50011
 
2 P.M. EDT
Weather: Scattered cumulus, overcast stratocumulus,
bright spots in overcast, higher clouds visible.     
Temperature: 63F, Dew point: 55F, Wind: NNE at 6 kts,
Sea-level pressure: 30.13 inches Hg, falling       
Visibility: 70 miles 
6-hour max. temp: 64F
BHO SA 1755 E25 BKN 40 OVC 70 212/63/55/0306/013/
HIER CLDS VSB/  8/87/ 58006 10064 20057
 
WEATHER SUMMARY FOR MONDAY, SEPTEMBER 15
 
TEMPERATURE (DEGREES F)
MAX.....79    NORMAL.....71
MIN.....60    NORMAL.....54
MEAN....70    NORMAL.....62
 
DEPARTURE FROM 30-YEAR NORMAL.............+8
TOTAL DEPARTURE FOR THE MONTH............+49 (+3.1 DEGREES/DAY)
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............45 WSW AT  8:27 A.M.  
                   AEROVANE.............45 WSW AT  8:27 A.M.           
                   ASOS.................46 WSW AT  8:27 A.M.  
                   DAVIS................46  W  AT  8:27 A.M.  
FASTEST MILE FOR YESTERDAY..............36 WSW AT  8:27 A.M.  
MAXIMUM 2-MINUTE ASOS AVERAGE...........36 WSW AT  8:27 A.M.           
MAXIMUM 2-MINUTE DAVIS AVERAGE..........36 WSW AT  8:27 A.M.          
                   AVERAGE............20.8 W   
                   ASOS...............19.1   
                   DAVIS..............20.2 WSW [240 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  SEPT..............3.13   DEPARTURE.......+1.10
                         ASOS..............3.15  
TOTAL PRECIPITATION FOR THE YEAR..........38.59   DEPARTURE.......+3.09 
                         ASOS.............41.15 #
#  Includes erroneous ASOS precipitation data on 2/13/08.
 
PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER 2008 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane recording wind system gust when significant
TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
 
9/1  81/57/69/+2/0.00/787/100    29 NW
9/2  74/60/67/+1/0.00/604/77     27 N 
9/3  75/57/66/0/0.00/766/98      22 N
9/4  85/62/74/+8/0.00/748/96     23 SSW
9/5  86/67/77/+12/0.00/575/74    32 SSE
9/6  82/68/75/+10/1.88/039/05    44 SE   Aero 39 MPH SE *
9/7  78/61/70/+5/0.31/655/85     43 NW   Aero 43 MPH NW *
9/8  78/58/68/+3/0.00/753/98     23 WSW
9/9  73/60/67/+3/0.32/054/07     43 SW   Aero 46 MPH SW TSTM #
9/10 68/52/60/-4/0.00/748/98     25 WNW   
9/11 69/48/59/-5/0.00/616/81     23 S
9/12 66/54/60/-3/0.22/008/01     33 S 
9/13 74/62/68/+5/T/113/15  **    21 S
9/14 70/64/67/+4/0.40/000/00     35 S   
9/15 79/60/70/+8/0.00/.../..     45 WSW  Aero 45 MPH WSW
 
** trace of rain added, not included in earlier reports... 
 
9/16 morning low temp. 54F; our normal low is now 53F
 
* Tropical Storm Hanna
# Thunderstorm gust 
 
NEW DAILY RECORDS FOR SEPTEMBER
 
None to date..
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR SEPTEMBER 16
HIGH 91F IN 1939,1941
LOW 39F IN 1984
PRECIP 5.12 INCHES IN 1933 (Hurricane)
PEAK GUST 59 MPH SSE IN 1999
 
RECORDS FOR SEPTEMBER 17
HIGH 86F IN 1915,1941,1991
LOW 38F IN 1959
PRECIP 2.73 INCHES IN 1933
PEAK GUST 60 MPH WNW IN 1999
 
TODAY'S REPORT PREPARED By: Robert Skilling