BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, SEPTEMBER 15, 2008    
ALL TIMES ARE IN EASTERN STANDARD TIME UNLESS NOTED 
 
TROPICAL AIRMASS BEGAN ARRIVING OVERNIGHT
AS REMNANTS OF HURRICANE IKE MOVED RAPIDLY NORTHEAST...
RAINFALL EARLY YESTERDAY TOTALED 0.40 INCH
 
The remnants of Hurricane Ike which moved inland in Texas
early Saturday morning moved rapidly northeastward through
the Mississippi Valley, mid-West and eastern Great Lakes.
The extratropical system joined up with an eastward moving
cold front and was centered near Montreal, Canada, early
today.
While no rainfall here was associated with Ike, showers 
ahead of a tropical airmass brought 0.40 inch yesterday 
morning.  A tropical airmass moved north and northeastward 
on the eastern flank of the northward moving tropical/
extra-tropical system and temperatures actually rose here 
overnight from the upper 60's late yesterday to the low to 
mid-70's by dawn this morning along with summer-like dew 
points in the low 70's. South winds veering to southwest 
were gusting near 40 MPH early today. A peak gust to 45 MPH 
was recorded from the WSW later this morning.    
 
Today's observations:
 
8 A.M. EDT
Weather: Clear, stratocumulus distant WSW-WNW, cirrus and
a few dense cirrus all quadrants 
Temperature: 75F, Dew point: 68F,  Wind: SW at 18G30 kts,
Wind: direction gradually veering, peak gust this hour 30
kts from SW at 7:55 a.m. EDT was last of several occurrences 
Sea-level pressure: 29.57 inches Hg, rising
Visibility: 25 miles, thin fog/haze  
6-hourly minimum temperature: 70F
24-hourly rainfall: 0.25 inch
BHO SA 1155 CLR 25 013/75/68/2318G30/957/ SC DSNT WSW-WNW CI/FEW 
DNS CI ALQDS LGT FG/HZ WND GRDLY VEERING PK WND 2230/55/
8/502 53015 ASOS 70028 MANUAL 70025 10075 20070
 
11 A.M. EDT                                                                          
Weather: Thin overcast cirrus with break, stratocumulus
forming in all parts of the sky  
Temperature: 76F, Dew point: 59F, Wind: WSW at 22G23 kts
Sea-level pressure: 29.65 inches Hg, rising
Visibility: 65 miles, NW 70 miles 
BHO SA 1455 250 –SCT 300 –OVC 65 041/76/59/2522G33/965/
SC FRMG ALQDS BINOVC VSBY NW 70 PK WND 2634/10/ WND 22V28/
8/501 51028 
 
2 P.M. EDT
Weather: Scattered stratocumulus and cirrus 
Temperature: 78F, Dew point: 57F, Wind: WSW at 23G33 kts,
Wind: direction SW-WNW, peak wind 35 kts WSW 35 past the hour   
Sea-level pressure: 29.71 inches Hg, rising
Visibility: 75 miles 
6-hour max. temp: 78F
BHO SA 1755 50 SCT 250 SCT 75 061/78/57/2523G32/971/
PK WND 2535/36/ WND 23V29/ 8/501 53020 10078 20075
 
WEATHER SUMMARY FOR SUNDAY, SEPTEMBER 14
 
TEMPERATURE (DEGREES F)
MAX.....70    NORMAL.....72
MIN.....64    NORMAL.....54
MEAN....67    NORMAL.....63
 
DEPARTURE FROM 30-YEAR NORMAL.............+4
TOTAL DEPARTURE FOR THE MONTH............+41 (+2.7 DEGREES/DAY)
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............35  S  AT 11:50 P.M. 
                   AEROVANE.............33  S  AT 11:50 P.M.          
                   ASOS.................35  S  AT  9:40 P.M. 
                   DAVIS................34 SSE AT 10:59 A.M. 
FASTEST MILE FOR YESTERDAY..............24  S  AT 11:57 P.M. *
MAXIMUM 2-MINUTE ASOS AVERAGE...........24  S  AT 11:56 P.M.           
MAXIMUM 2-MINUTE DAVIS AVERAGE..........24 SSE AT  9:46 P.M.         
                   AVERAGE............16.3 S  
                   ASOS...............16.1   
                   DAVIS..............13.7 SSE [160 deg]
* last of several occurrences...
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.25   DEPARTURE.......+0.11 
                         ASOS..............0.28
TOTAL PRECIPITATION FOR  SEPT..............3.13   DEPARTURE.......+1.24
                         ASOS..............3.15  
TOTAL PRECIPITATION FOR THE YEAR..........38.59   DEPARTURE.......+3.23 
                         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/.../..     33 S 
9/13 74/62/68/+5/0.00/.../..     21 S
9/14 70/64/67/+4/0.40/000/00     35 S   
 
9/15 our morning low temp. 70F; normal low is now 54F
 
* 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 15
HIGH 89F IN 1931
LOW 35F IN 1913
PRECIP 3.93 INCHES IN 1904 (Extra-tropical storm making landfall in 
New England on 9/15/1904 passing east of BHO and bringing a storm total 
of 4.11 inches 9/14-15/1904)
PEAK GUST 65e MPH NW, WSW IN 1944 (In the wake of Great Atlantic Hurricane)
 
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
 
TODAY'S REPORT PREPARED By: Robert Skilling