BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, OCTOBER 1, 2007    
ALL TIMES ARE IN EASTERN STANDARD TIME
 
A FEW HIGHLIGHTS FOR SEPTEMBER
 
AUGUST-SEPTEMBER 2007 RANKED 2ND SUNNIEST 
SEPTEMBER 2007 RANKED 3RD SUNNIEST ON RECORD 
THE AVERAGE MAX. TEMP. WAS 2ND WARMEST ON RECORD
AUGUST-SEPTEMBER RANKED 3RD DRIEST WITH 2.52 INCHES
 
SEPTEMBER 2007 DATA 
Degrees F / inches of rainfall
 
Av. Max. 75.7 
Av. Min. 55.7
Mean 65.7 [+3.5]
24-hr. mean 64.5
Heating units: 63 [-75] 
Cooling units: 91 [+42] 
Max. temp: 93/8th
Min. temp: 45/16th
Total precip: 1.89 ins. [-2.24]
Max. in 24 hours: 1.34 ins. [11th] 
Sunshine:  265.9 hours [uncorrected] 
and 276.7 hours [corrected] both at 74%
of possible 
Av. vapor pressure: 14.4 mbs. 
Av. wind speed [corrected] 11.6 MPH 
Prevailing wind: SSW @ 14%
 
Today's observations:
 
7 A.M.   
Weather: Clear, few middle and high clouds, distant patches dense 
shallow ground fog   
Temperature: 53F, Dew point: 45F, Wind: SE at 8 kts
Sea-level pressure: 30.56 inches Hg, rising
Visibility: 40 miles, 50 miles NE-SE 
6-hour min temp: 49F
BHO SA 1155 CLR 40 350/53/45/1408/056/ AC DSNT NW-NE 
PTCH CC ENE-SE CI ALQDS SML PTCH STEAM FG OVR POND SE 
AND PTCHS DSNT SHLW DENSE GF DSNT WSW-NW VSBY NE-SE 50/
8/041 51008 10053 20049  
 
10 A.M.   
Weather: High thin overcast, stratocumulus clouds   
Temperature: 62F, Dew point: 47F, Wind: S at 6 kts 
Sea-level pressure: 30.56 inches Hg, steady
Visibility: 50 miles 
BHO SA 1455 220 SCT 250 –SCT 300 –OVC 50 350/62/47/1706/056/
SC/FEW MODT TOPS ALQDS BINOVC NE-SE/ 8/501 58000
 
1 P.M.     
Weather: High overcast cirrus, cirrostratus,  halo   
Temperature: 65F, Dew point: 47F, Wind: E at 4 kts 
Wind: light
Sea-level pressure: 30.51 inches Hg, falling
Visibility: 50 miles
6-hour max. temp.: 66F 
BHO SA 1755 220 SCT E250 OVC 50 332/65/47/0804/051/ SC DSNT SSW-NNW
OVC PTLY THN HALO WND LGT/ 8/507 58018 10066 20053 
 
WEATHER SUMMARY FOR SUNDAY, SEPTEMBER 30
 
TEMPERATURE (DEGREES F)
MAX.....63    NORMAL.....66 
MIN.....50    NORMAL.....48
MEAN....57    NORMAL.....57
DEPARTURE FROM 30-YEAR NORMAL......... 0 
TOTAL DEPARTURE FOR THE MONTH.......+115  [+3.6 DEGREES/DAY]
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............23 NNW AT  1:17 A.M.    
                   AEROVANE.............. 23 NNW AT  1:17 A.M.    
                   ASOS...................23 NNW AT  1:17 A.M  
                   DAVIS..................24 NW  AT  1:17 A.M.  
FASTEST MILE FOR YESTERDAY................16 ESE AT  7:55 P.M.       
MAXIMUM 2-MINUTE ASOS AVERAGE.............14 SE  AT  8:03 P.M.    
MAXIMUM 2-MINUTE DAVIS AVERAGE............17 ESE AT  7:55 P.M. .     
AVERAGE WIND SPEED AND DIRECTION..........10.0 SE  
                   ASOS................... 9.7   
                   DAVIS..................10.2 NE [040 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..........1.89  DEPARTURE.....-2.24  
                         ASOS..............1.89    
TOTAL PRECIPITATION FOR THE YEAR..........32.88  DEPARTURE.....-4.72
                         ASOS.............32.12    
 
PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER 2007...CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
 
AERO: Aerovane recording wind system when significant
TSTM: Thunderstorm day
....: Data not yet available
 
9/1  79/57/68/+1/0/790/100    25 WNW   
9/2  78/51/65/-1/0/787/100    22 S   
9/3  85/57/71/+5/0/760/97     31 SSW AERO 28 MPH SSW 
9/4  76/61/69/+3/0/641/82     28 NW  AERO 26 MPH NW
9/5  74/53/64/-1/0/732/94     21 ESE 
9/6  76/55/66/+1/0/380/49     31 S
9/7  92/62/77/+12/0/680/88    30 SSW
9/8  93/67/80/+15/0/686/89    31 S    TSTM 
9/9  72/57/65/+1/0.16/000/00  28 NNE  TSTM 
9/10 66/57/62/-2/0.03/000/00  18 NNE
9/11 68/58/63/-1/1.34/000/00  30 WNW  
9/12 73/55/64/+1/0/752/99     35 W    Aero 33 MPH W
9/13 73/52/63/0/0/741/98      23 ESE  
9/14 76/56/66/+3/0/587/78     26 SSE
9/15 63/49/56/-6/0.33/225/30  36 WNW  
9/16 65/45/55/-7/0/606/81     20 WNW  
9/17 63/46/55/-7/0/738/99     20 NE  
9/18 64/46/55/-6/0/720/97     22 NE    
9/19 69/48/59/-2/0/414/56     18 S 
9/20 81/53/67/+6/0/597/81     18 SSW
9/21 77/60/69/+9/0/653/89     20 N
9/22 79/60/70/+10/0/417/57    27 S
9/23 77/59/68/+8/0/713/98     25 WNW
9/24 80/55/68/+9/0/703/97     24 WNW 
9/25 86/57/72/+13/0/701/97    27 SSW
9/26 91/67/79/+20/0/641/89    32 S    Aero 32 MPH S *
9/27 83/65/74/+16/0.02/445/62 30 SSW  Aero 29 MPH SSW *
9/28 77/57/67/+9/0.01/428/60  25 WSW
9/29 72/55/64/+6/0/640/90     30 NW
9/30 63/50/57/0/0/425/60      23 NNW
 
10/1 morning low temp. 49F; normal low now 48F
 
* Aerovane gusts corrected for 9/26 and 9/27.
 
NEW DAILY RECORDS FOR SEPTEMBER 2007: 
 
9/7 -  RECORD HIGH TEMPERATURE 92; PREVIOUS 91 IN 1945.
9/8 -  RECORD HIGH TEMPERATURE 93; PREVIOUS 91 IN 1945.
9/26 - RECORD HIGH TEMPERATURE 91; PREVIOUS 87 IN 1958.
     - EQUALED HIGH MINIMUM TEMPERATURE OF 67; ALSO IN 1920. 
     - LATEST 90-DEG. TEMPERATURES; PREVIOUS RECORD WAS 
       93 DEG. ON SEPT. 23, 1895 AND 1914. 
9/27 - RECORD HIGH MINIMUM TEMPERATURE OF 65; PREVIOUS 63 IN 1930.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR OCTOBER 1
HIGH 85F IN 1927
LOW 30F IN 1992
PRECIP 1.44 INCHES IN 1984
PEAK GUST 68e MPH SSE IN 1977
 
RECORDS FOR OCTOBER 2
HIGH 85F IN 1968
LOW 29F IN 1899
PRECIP 1.75 INCHES IN 1984
PEAK GUST 52e MPH S IN 1952, 52 NNW IN 1984
 
TODAY'S REPORT PREPARED By: Robert Skilling