BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, SEPTEMBER 29, 2008
ALL TIMES ARE IN EASTERN STANDARD TIME UNLESS NOTED
 
FALL OPEN HOUSE AT THE OBSERVATORY ON SATURDAY, OCT 4...
We will be having our annual fall open house at the
Observatory next Saturday, October 4 from 10 AM to 4 PM.
There will be free guided tours of the facility and a
"Inconvenient Truth" slide show at 11:30 AM and 1 PM.
 
NINTH ANNUAL SOUTHERN NEW ENGLAND WEATHER CONFERENCE TO
BE HELD SATURDAY, OCT 25...
Registration is now open for the Southern New England
Weather Conference being held at the Clay Center in
Brookline on October 25th.  To see the agenda or to
register go to www.sneweatherconf.org.
 
FOUR DAY RAINFALL TOTAL SEPT. 26-29 REACHED 4.31 INS.
IN THE STANDARD GAGE
 
ASOS DAILY TOTALS:
9/26.....2.42
9/27.....0.96
9/28.....0.78
9/29.....0.17
 
Additional showers during the early morning hours of
today totaled 0.17 inch bringing the 4-day total to 4.33
inches through 8 A.M. EDT for ASOS and 4.31 for the
standard rain gage. 
 
UNUSUALLY LOW WINDS DURING PASSAGE OF KYLE
 
The average wind speed for the day yesterday as the 
center of Kyle passed about 200 miles to our east was 
4.3 MPH! The peak gust only 14 MPH from the WNW late 
in the evening.

The low winds in southern New England during the passage 
of Kyle were due to several factors. The wind field 
around Hurricane Kyle was asymmetric as it moved up the 
East Coast, since it was attempting to organize while
enduring some wind shear from the trough to its west.  
This produced the strongest winds ahead of and east of 
the center. In addition, the right side of the storm had 
higher winds due to the contribution of its forward motion 
to the wind field, which is true for all tropical cyclones. 
Finally, Kyle was steered northward between a ridge of 
high pressure to its east, which further increased the 
pressure gradient and the resulting winds on right side of 
the storm, and a trough of low pressure to its west, which 
generated a lower pressure gradient and lower winds to the 
west of the storm center.

 
Today's observations:
 
8 A.M. EDT
Weather: Broken low thin stratus, overcast altocumulus
with breaks in overcast overhead thru SW-NW
Temperature: 62F, Dew point: 62F,  Wind: NW at 8 kt
Sea-level pressure: 29.90 inches Hg, rising
Visibility: 12 miles, 8 miles E-SE, thin fog
6-hourly minimum temperature: 61F
24-hourly rainfall: 0.76 in.
BHO SA 1155 3V –SCT E85 BKN 100 OVC 12 125/62/62/3208/990/
3 –SCT V BKN STRA DRFTG BLO AND OCNL OVR SMT
BINOVC OVHD-SW-NW VSBY E-SE 8 WNW 20 REUKN/ 8/67/
53008 ASOS 60017 ASOS 70073 MANUAL 70076 10065 20061
 
11 A.M. EDT
Weather: Overcast low stratus clouds  
Temperature: 64F, Dew point: 62F, Wind: NNW at 7 kts
Sea-level pressure: 29.93 inches Hg, rising
Visibility: 35 miles, 55 miles WNW
3-hourly rainfall: trace
BHO SA 1455 8 SCT E23 OVC 35 135/64/62/3307/993/
CIG RGD VSBY WNW 55/ 8/6// 51010/ MANUAL 6000/
 
2 P.M. EDT
Weather: Scattered cumulus, moderate SW-NW, scattered
stratocumulus, scattered dense ci layer distant NE-SE
Temperature: 68F, Dew point: 57F, Wind: NE at 9 kts
Sea-level pressure: 29.91 inches Hg, falling
Visibility: 55 miles
6-houly max. temp. 68F;
6-hourly precip: trace
BHO SA 1755 25 SCT 55 SCT 200 SCT 55 129/68/57/0409/991/
MDT CU SW-NW FEW SCSL ALQDS DENS CI LYR DSNT NE-SE WND 01V08/
8/802 58006 MANUAL 6000/ 10068 20062
 
WEATHER SUMMARY FOR SUNDAY, SEPTEMBER 28
 
TEMPERATURE (DEGREES F)
MAX.....69    NORMAL.....67
MIN.....65    NORMAL.....49
MEAN....67    NORMAL.....58
 
DEPARTURE FROM 30-YEAR NORMAL.............+9
TOTAL DEPARTURE FOR THE MONTH............+35 (+1.1 DEGREES/DAY)
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............14 WNW AT 11:05 P.M.
                   AEROVANE.............14 WNW AT 11:05 P.M.
                   ASOS.................14 WNW AT 11:05 P.M.   
                   DAVIS................14 WNW AT 11:05 P.M.
FASTEST MILE FOR YESTERDAY..............10 WNW AT 11:06 P.M.       
MAXIMUM 2-MINUTE ASOS AVERAGE...........12 WNW AT 11:06 P.M.  
MAXIMUM 2-MINUTE DAVIS AVERAGE..........11 W   AT 10:05 P.M.
                   AVERAGE.............4.3 ESE 
                   ASOS................4.2
                   DAVIS...............4.3 SSE [160 deg]
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.76   DEPARTURE.......+0.62
                         ASOS..............0.73
TOTAL PRECIPITATION FOR THE MONTH..........7.31   DEPARTURE.......+3.59
                         ASOS..............7.33
TOTAL PRECIPITATION FOR THE YEAR..........42.90   DEPARTURE.......+5.58 
                         ASOS.............45.48 #
#  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/+8/0.00/697/93     45 WSW  Aero 45 MPH WSW **
9/16 64/54/59/-3/0.00/045/06     21 NNW
9/17 72/53/63/+1/0.00/646/87     20 S 
9/18 65/49/57/-4/0.00/599/81     31 NNE  Aero 28 MPH NNE
9/19 57/47/52/-9/0.00/685/93     28 NE
9/20 64/46/55/-6/0.00/624/85     16 SSW
9/21 77/49/63/+3/0.00/687/94     25 NW
9/22 59/50/55/-5/0.00/022/03     24 NNE
9/23 62/47/55/-5/0.00/.../..     20 ENE
9/24 65/47/56/-3/0.00/.../..     16 E   
9/25 65/50/58/-1/0.00/.../..     24 NE
9/26 64/57/61/+2/.../000/00      37 NE   Aero 35 MPH NE
9/27 67/62/65/+7/.../000/00      27 NE
9/28 69/65/67/+9/.../000/00      14 WNW
 
9/29 morning low temp. 61F; our normal low is now 49F
 
* Tropical Storm Hanna
# Thunderstorm gust 
** Ike remnants
 
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 29
HIGH 85F IN 1952
LOW 28F IN 1914 (SEPTEMBER MINIMUM RECORD)
PRECIP 2.61 INCHES IN 1907
PEAK GUST 62 MPH S IN 2005
 
RECORDS FOR SEPTEMBER 30
HIGH 84F IN 1986
LOW 31F IN 1992
PRECIP 1.93 INCHES IN 1946
PEAK GUST 58 MPH SSE IN 1999
 
TODAY'S REPORT PREPARED By: Robert Skilling / Mike Iacono