BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, SEPTEMBER 17, 2008    
ALL TIMES ARE IN EASTERN STANDARD TIME UNLESS NOTED 
 
HIGH CLOUDS BUT PLENTY OF SUNSHINE AND WARMER TEMPS.
 
After yesterday's cloudy sky today's weather is a
welcome change back to sunny conditions.  Temperatures
have risen to near normal readings in the lower 70's
by early this afternoon.
 
Today's observations:
 
8 A.M. EDT
Weather: Thin scattered cirrus, dense patches N-E,
few cirrocumulus NE-SE  
Temperature: 55F, Dew point: 51F,  Wind: NW at 8 kts
Sea-level pressure: 30.16 inches Hg, steady
Visibility: 60 miles, NNE 25 miles, thin smoke layer,
NW 70 miles    
6-hourly minimum temperature: 53F
24-hourly rainfall: 0.00 inch
BHO SA 1155 250 –SCT 60 214/55/51/3208/016/
PTCHS DENS CI N-E FEW CC/CCSL NE-SE PTCHS
THN GF STEAM FG FEW DENSE DSNT PTCHS SLWLY
DSSPTNG PST HR THN K LYR NNE-NE VSBY NNE 25 NW 70/
8/002 53000 10058 20053  
 
11 A.M. EDT
Weather: Clear, cumulus forming, few cirrus and dense cirrus
to the southeast thru southwest
Temperature: 65F, Dew point: 51F, Wind: W at 3 kts (estimated),
Wind: light 
Sea-level pressure: 30.18 inches Hg, falling
Visibility: 60 miles, NE 35, NW 70, thin smoke NNE-NE,
also, fog bank visible offshore NE-E  
BHO SA 1455 CLR 60 220/65/51/E2803/018/
CU FRMG FEW CI ALQDS DENS CI SE-SW THN K NNE-NE FG BNK
OFFSHR NE-E VSBY NE-E 30 NW 70 WND LGT/ 8/102 50006
 
2 P.M. EDT
Weather: Scattered dense cirrus, broken cirrus, few cumulus,
stratocumulus distant SE-SSE, mostly clear W-N   
Temperature: 70F, Dew point: 50F, Wind: SSW at 7 kts,
Wind: direction variability SSE-SW
Sea-level pressure: 30.14 inches Hg, falling                                                                           
Visibility: 55 miles, 25 miles NE-E, fog bank offshore    
6-hour max. temp: 71F
BHO SA 1755 220 SCT E250 BKN 55 205/70/50/1907/014/
FEW CU ALQDS SC DSNT SE-SSE DENS CI OVHD-E-S-SW
MSTLY CLR SKY W-NE THN K LYR N-E FG BNK OFFHSR NNE-E
VSBY NE-E 25 NW 70 LGT HZ ALQDS WND 16V23/ 8/402
58015 10071 20055
 
WEATHER SUMMARY FOR TUESDAY, SEPTEMBER 16
 
TEMPERATURE (DEGREES F)
MAX.....64    NORMAL.....71
MIN.....54    NORMAL.....53
MEAN....59    NORMAL.....62
 
DEPARTURE FROM 30-YEAR NORMAL.............-3
TOTAL DEPARTURE FOR THE MONTH............+46 (+2.7 DEGREES/DAY)
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............21 NNW AT  2:18 A.M. *   
                   AEROVANE.............22 NNW AT  1:18 A.M.            
                   ASOS.................23 NNW AT  1:18 A.M.   
                   DAVIS................22 N   AT  1:18 A.M.   
FASTEST MILE FOR YESTERDAY..............15 NNW AT  2:04 A.M. *   
MAXIMUM 2-MINUTE ASOS AVERAGE...........15 NNW AT  2:06 A.M.            
MAXIMUM 2-MINUTE DAVIS AVERAGE..........16 NNW AT  1:18 A.M.           
                   AVERAGE............ 7.5 NNW  
                   ASOS................7.3    
                   DAVIS...............7.7 N [010 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  SEPT..............3.13   DEPARTURE.......+0.96
                         ASOS..............3.15  
TOTAL PRECIPITATION FOR THE YEAR..........38.59   DEPARTURE.......+2.95 
                         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/+8/0.00/697/93     45 WSW  Aero 45 MPH WSW **
9/16 64/54/59/-3/0.00/045/06     21 NNW
 
9/17 morning low temp. 53F; our normal low is now 53F
 
* 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 17
HIGH 86F IN 1915,1941,1991
LOW 38F IN 1959
PRECIP 2.73 INCHES IN 1933
PEAK GUST 60 MPH WNW IN 1999
 
RECORDS FOR SEPTEMBER 18
HIGH 88F IN 1906
LOW 36F IN 1919
PRECIP 4.25 INCHES IN 1996
PEAK GUST 77e MPH WNW IN 1948
 
TODAY'S REPORT PREPARED By: Robert Skilling