BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, OCTOBER 7, 2008
ALL TIMES ARE IN EASTERN STANDARD TIME UNLESS NOTED
 
A BEAUTIFUL BRIGHT BLUE OCTOBER DAY WITH
VISIBILITY UP TO 80 TO 90 MILES UNDER  
A COMPLETELY CLOUDLESS SKY AFTER A MORNING
LOW OF 37F, COLDEST OF SEASON TO DATE  
 
It's not very often we have a day without a
cloud visible somewhere as we observe the
sky from the summit.  However, today has
been one of those unusual days. The weather
today is often referred as "October's bright
blue weather".  Visibility is up to 80 to 90
miles from here and from the summit of Mt.
Washington the visibility is reported at 120
miles.
Our morning low temperature of 37F is the
coldest it has been since 35F on May 1st.  
 
Today's observations:
 
8 A.M. EDT
Weather: Sky clear (SKC)
Temperature: 41F, Dew point: 32F,  Wind: WNW at 12 kts
Sea-level pressure: 30.32 inches Hg, rising
Visibility: 80 miles
6-hourly minimum temperature: 37F
24-hourly rainfall: 0.00
BHO SA 1155 CLR 80 266/41/32/3012/032/
51000 10041 20037
 
11 A.M. EDT
Weather:  Sky clear (SKC)  
Temperature: 53F, Dew point: 34F, Wind: WNW at 11 kts
Wind: Direction variable W-NNW
Sea-level pressure: 30.29 inches Hg, falling
Visibility: 80 miles  
BHO SA 1455 CLR 80 258/53/34/2911/029/ WND 26V33
58008
 
2 P.M. EDT
Weather: Sky clear, (SKC)
Temperature: 60F, Dew point: 33F, Wind: W at 12 kts
Wind: direction variability WSW-NW
Sea-level pressure: 30.24 inches Hg, falling
Visibility: 80 miles
6-hourly max. temp. 61F
BHO SA 1755 CLR 80 240/60/33/2712/024/ WND 24V32/
58018 10061 20041
 
WEATHER SUMMARY FOR MONDAY, OCTOBER 6
 
TEMPERATURE (DEGREES F)
MAX.....58    NORMAL.....64
MIN.....39    NORMAL.....46
MEAN....49    NORMAL.....55
 
DEPARTURE FROM 30-YEAR NORMAL.............-6
TOTAL DEPARTURE FOR THE MONTH............-15 (-2.7 DEGREES/DAY)
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............28 WNW AT  4:13 P.M.  
                   AEROVANE.............25 WNW AT  4:13 P.M.  
                   ASOS.................26 WNW AT  4:14 P.M. 
                   DAVIS................27 WNW AT  4:13 P.M.  
FASTEST MILE FOR YESTERDAY..............18 WNW AT  3:21 P.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...........18 WNW AT  3:22 P.M. 
MAXIMUM 2-MINUTE DAVIS AVERAGE..........20 WNW AT  3:22 P.M.  
                   AVERAGE............ 10.5 NW 
                   ASOS................10.0
                   DAVIS...............10.8 NW [310 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..........0.60   DEPARTURE.......-0.24
                         ASOS..............0.61
TOTAL PRECIPITATION FOR THE YEAR..........43.50   DEPARTURE.......+5.06
                         ASOS.............46.09 #
#  Includes erroneous ASOS precipitation data on 2/13/08.
 
PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 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
 
10/1 68/58/63/+6/.../120/17      38 SW   TSTM #
10/2 62/46/54/-2/.../455/65      45 W
10/3 62/45/54/-2/T/376/54        44 SSW  Aero 43 MPH SSW
10/4 61/40/51/-5/0.00/612/88     32 WSW
10/5 53/45/49/-6/T/000/00        18 WNW
10/6 58/39/49/-6/0.00/.../..     28 WNW
 
10/7 morning low temp. 37F; our normal low is now 46F
 
# Thunderstorm gust 
 
NEW DAILY RECORDS FOR OCTOBER
 
None...
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR OCTOBER 7
HIGH 88 IN 1963 (RECORD FOR MONTH)
LOW 30 IN 1904,1986
PRECIP 1.75 INCHES IN 1972
PEAK GUST 52 MPH ESE IN 1972
 
RECORDS FOR OCTOBER 8
HIGH 81 IN 1916,1990
LOW 28 IN 1919
PRECIP 2.31 INCHES IN 1891
SNOWFALL TRACE IN 1988, 2001 (EARLIEST DATE)
PEAK GUST 60 MPH NE IN 1996
 
TODAY'S REPORT PREPARED By: Robert Skilling