BLUE HILL METEOROLOGICAL OBSERVATORY 
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, OCTOBER 7, 2011
ALL TIMES ARE IN EASTERN STANDARD TIME
 
ANOTHER CLEAR, COOL, CRISP FALL DAY;
RECORD HIGH TEMPERATURES POSSIBLE OVER WEEKEND
 
The morning low of 39F was the coolest temperature observed on the
summit since April 23.  The high temperature did manage to reach the
lower 60s, but overall today will average several degrees below normal.
The air remains dry with dew point temperatures in the low to mid 30s.
Sunshine has been plentiful, altough slightly filtered at times through
persistent high, thin cirrus clouds.  Winds have been quite light from
the west.
 
Temperatures will warm up quite nicely this weekend.  In fact, new
record high temperatures may be set.  Below are the current record
highs for the upcoming days.
 
CURRENT RECORD HIGH TEMPERATURES
10/8   81F  1916, 1990
10/9   81F  1906
10/10  85F  1949
 
 
Today's observations:
 
7 A.M.  
Weather: Broken thin cirrus (2 layers), valley fog 10 miles WSW-W,
thin smoke layer along horizon NNE-SE and S-SSW
Temperature: 42F, Dew point: 31F; Wind: NW at 7 kts,
Sea-level pressure: 30.44 inches Hg, rising
Visibility: 80 miles
6-hour min: 39F
BHO SA 1155 250 –BKN 300 –BKN 80 308/42/31/3107/044/ VLY FG 10
WSW-W THN K LYR ALG HRZN NNE-SE AND S-SSW/ 8/001 53020 10045 20039
 
10 A.M.
Weather: Scattered cirrostratus, broken thin cirrus (2 layers), few
small cumulus/cumulus fractus forming distant ESE-SSE, patches of
dense cirrus NNE and NE-SSE and SW-WSW, thin smoke layer distant
N-ENE and distant WSW-NW
Temperature: 53F, Dew Point: 34F; Wind: Estimated W at 3 kts,
Wind: Light and variable 
Sea-level pressure: 30.47 inches Hg, rising
Visibility: 80 miles   
BHO SA 1455 220 SCT 250 –BKN 300 –BKN 80 318/53/34/E2603/047/ FEW
SML CU/CUFRA FRMG DSNT ESE-SSE PTCHS DNS CI NNE AND NE-SSE AND
SW-WSW THN K LYR DSNT N-ENE AND DSNT WSW-NW WND LGT AND VRB/
8/102 50010
 
1 P.M. 
Weather: Broken thin cirrus (2 layers), few patches of dense cirrus
distant SE-SSE and WNW, thin smoke layer distant N-E, light distant
haze
Temperature: 60F, Dew Point: 36F; Wind: Estimated W at 3 kts,
Wind: Light and variable
Sea-level pressure: 30.45 inches Hg, falling
Visibility: 75 miles, light distant haze
6-hour max. temp: 60F
BHO SA 1755 250 –BKN 300 –BKN 75 310/60/36/E2603/045/ FEW PTCHS DNS
CI DSNT SE-SSE AND WNW THN K LYR DSNT N-E LGT DSNT HZ WND LGT AND VRB/
8/002 58008 10060 20042
 
WEATHER SUMMARY FOR THURSDAY, OCTOBER 6
 
TEMPERATURE (DEGREES F)
MAX.....60    NORMAL.....64
MIN.....40    NORMAL.....46
MEAN....50    NORMAL.....55
 
DEPARTURE FROM 30-YEAR NORMAL.....................-5
TOTAL DEPARTURE FOR THE MONTH.....................+9 [+1.3 DEGREES/DAY]
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............31 NW  AT  9:26 A.M.    
                   AERO...................35 WNW AT  9:10 A.M.
                   ASOS...................35 N   AT  9:11 A.M.
                   DAVIS..................34 NNW AT  9:11 A.M. RMY: 36
THE FASTEST MILE FOR YESTERDAY............23 NW  AT  9:35 A.M. *
MAXIMUM 2-MINUTE ASOS AVERAGE.............22 NW  AT  9:27 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE............22 NW  AT  9:13 A.M.
AVERAGE WIND SPEED AND DIRECTION........13.7 WNW
                   ASOS.................13.2  
                   DAVIS................12.0 WNW [297 deg]
*last of several occurrences...
 
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..........2.82 DEPARTURE..........+1.98
                         ASOS..............2.76
TOTAL PRECIPITATION FOR THE YEAR..........46.88 DEPARTURE..........+8.44
                        ASOS..............47.22**
**ASOS data is in error due to system failure on 1/12-13
 
PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 2011 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane wind recording system gust when significant
RMY:  R.M. Young wind gust recording system added 8/9/2011
TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
 
10/1 70/55/63/+6/..../.../..     24 NE  AERO N/A        RMY 25 MPH TSTM
10/2 64/54/59/+3/..../.../..     24 NNE AERO 27 MPH NNE RMY 26 MPH
10/3 67/53/60/+4/..../.../..     20 S   AERO 22 MPH S   RMY 22 MPH
10/4 65/52/59/+3/..../.../..     24 NW  AERO 25 MPH NNW RMY 25 MPH
10/5 63/42/53/-2/T/.../..        43 WNW AERO 42 MPH WNW RMY 44 MPH
10/6 60/40/50/-5/0.00/.../..     31 NW  AERO 35 MPH WNW RMY 36 MPH
 
10/7 our morning low temp: 39F; the normal low is now 46F
 
DAILY RECORDS FOR OCTOBER 2011
None so far.
 
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 54 W IN 2009
 
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: Sean Fankhauser