BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, SEPTEMBER 26, 2007    
ALL TIMES ARE IN EASTERN STANDARD TIME
 
RECORD HIGH TEMPERATURE TODAY
 
Today's high temperature has already reached 90 degrees 
as of 2 P.M. EDT, surpassing the previous record for this
date of 87 degrees set in 1958.  Today's high temperature
also makes today the latest date in September to reach 
90 degrees.  Prior to this, the last time we saw 90 degree
temperatures in late September was in both 1895 and 1914, 
when the temperature reached 90 degrees on September 22 
and 93 degrees on September 23.
 
This morning's low temperature of 67 degrees might tie the 
record for the highest minimum temperature for this date set
in 1920 if the temperature does not drop below 67 degrees 
before midnight tonight.
 
Yesterday's high temperature of 86 degrees fell one degree
short of the record of 87 degrees set in 1970.
 
Today's observations:
 
7 A.M.   
Weather: Clear, few cumulus/stratocumulus
Temperature: 69F, Dew point: 63F, Wind: S at 13 kts 
Sea-level pressure: 29.99 inches Hg, rising
Visibility: 10 miles, hazy  
6-hour min temp: 67F
24-hour rainfall: 0.00 inches
BHO SA 1155 CLR 10 156/69/63/1913/999/ 
FEW CU/SC ALQDS HAZY/ 8/500 50003 10069 20067
 
10 A.M.   
Weather: Clear 
Temperature: 82F, Dew point: 66F, Wind: SSW at 12 kts
Wind: Variability S-W
Sea-level pressure: 29.98 inches Hg, falling
Visibility: 10 miles, hazy
BHO SA 1455 CLR 10 153/82/66/2012/998/ HAZY WND 17V26/ 58003
 
1 P.M.   
Weather: Clear 
Temperature: 90F, Dew point: 65F, Wind: S at 15G22 kts
Sea-level pressure: 29.93 inches Hg, falling
Visibility: 10 miles, hazy   
6-hour max. temp. 90F
BHO SA 1755 CLR 10 137/90/65/1815G22/993/ 
HAZY/ 58016 10090 20069
 
 
WEATHER SUMMARY FOR TUESDAY, SEPTEMBER 25
 
TEMPERATURE (DEGREES F)
MAX.....86    NORMAL.....68 
MIN.....57    NORMAL.....50
MEAN....72    NORMAL.....59
DEPARTURE FROM 30-YEAR NORMAL........+13 
TOTAL DEPARTURE FOR THE MONTH........+64  [+2.4 DEGREES/DAY]
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............27 SSW AT  1:21 P.M.   
                   AEROVANE...............22 SSW AT  1:21 P.M.     
                   ASOS...................28 SW  AT  1:21 P.M.  
                   DAVIS..................32 S   AT  1:21 P.M. 
FASTEST MILE FOR YESTERDAY................20 SSW AT 12:50 P.M.        
MAXIMUM 2-MINUTE ASOS AVERAGE.............21 SW  AT  1:22 P.M. 
MAXIMUM 2-MINUTE DAVIS AVERAGE............23 S   AT  1:22 P.M.     
AVERAGE WIND SPEED AND DIRECTION..........14.3 SW 
                   ASOS...................14.0  
                   DAVIS..................15.4 SW [216 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..........1.86  DEPARTURE.....-1.57  
                         ASOS..............1.88    
TOTAL PRECIPITATION FOR THE YEAR..........32.85  DEPARTURE.....-4.05
                         ASOS.............32.11    
 
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 morning low temp. 67F; normal low is now 50F 
 
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.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR SEPTEMBER 26
HIGH 87F IN 1958
LOW 36F IN 1905,1922,1978
PRECIP 3.84 INCHES IN 1888
PEAK GUST 54e MPH S IN 1977
 
RECORDS FOR SEPTEMBER 27
HIGH 84F IN 1998
LOW 32F IN 1947
PRECIP 2.26 INCHES IN 1962
PEAK GUST 100 MPH SSE IN 1985 (HURRICANE GLORIA)
 
TODAY'S REPORT PREPARED By: Stephanie Radner