BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, SEPTEMBER 24, 2007    
ALL TIMES ARE IN EASTERN STANDARD TIME
 
VERY SUNNY AND INCREASINGLY WARM SEPTEMBER CONTINUES
THE RECORD HIGH TEMPERATURE NEXT TWO DAYS IS 87 DEGREES
 
We've recorded 72% of the possible bright sunshine through 
yesterday, the 23rd.  The maximum percent of sunshine 
recorded for September is 74% in 1941 and 1983 so we are 
getting close to a record.  Average for the month is 55%.  
  
Today becomes the 5th consecutive day with well above normal
temperatures and the month is approaching 2 degrees warmer 
than normal.  Record or near record late September heat 
is expected the next couple of days.  Our record high temps. 
for 25 September is 87 degrees in 1970 and for 26 September 
it is also 87 degrees recorded in 1958. 
 
Today's observations:
 
7 A.M.   
Weather: Thin scattered cirrus W-N and distant SE-S  
Temperature: 59F, Dew point: 43F, Wind: NW at 12 kts 
Sea-level pressure: 30.23 inches Hg, rising
Visibility: 75 miles   
6-hour min temp: 55F
24-hour rainfall: 0.00 inches
BHO SA 1155 250 –SCT 75 236/59/43/3112/023/ CI W-N AND DSNT SE-S/ 
8/001 52013 10060 20055
 
10 A.M.   
Weather: Thin scattered cirrus, N-E-S 
Temperature: 71F, Dew point: 46F, Wind: WNW at 06 ktS
Sea-level pressure: 30.25 inches Hg, falling
Visibility: 75 miles
BHO SA 1455 250 –SCT 75 242/72/46/3006/025/ 
CI N-E-S/ 8/001 50006
 
1 P.M.   
Weather: Clear, few distant cirrus 
Temperature: 77F, Dew point: 47F, Wind: WSW at 08G15 kts
Wind: Variability SW-NW
Sea-level pressure: 30.22 inches Hg, falling
Visibility: 70 miles  
6-hour max. temp. 78F
BHO SA 1755 CLR 70 222/77/47/2608G15/019/ FEW DSNT CI 
WND 23V32/ 8/001 56020 10078 20059 
  
WEATHER SUMMARY FOR SUNDAY, SEPTEMBER 23
 
TEMPERATURE (DEGREES F)
MAX.....77    NORMAL.....69 
MIN.....59    NORMAL.....51
MEAN....68    NORMAL.....60
DEPARTURE FROM 30-YEAR NORMAL........+ 8 
TOTAL DEPARTURE FOR THE MONTH........+42  [+1.6 DEGREES/DAY]
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............25 WNW AT 7:53 P.M.   
                   AEROVANE...............21 WNW AT 7:53 P.M. *    
                   ASOS...................24 WNW AT 7:54 P.M. 
                   DAVIS..................26 W   AT 7:53 P.M. 
FASTEST MILE FOR YESTERDAY................18 WNW AT 8:31 P.M. *       
MAXIMUM 2-MINUTE ASOS AVERAGE.............17 WNW AT 9:47 P.M. 
MAXIMUM 2-MINUTE DAVIS AVERAGE............20 W   AT 7:54 P.M.    
AVERAGE WIND SPEED AND DIRECTION..........12.9 WNW 
                   ASOS...................12.1 
                   DAVIS..................13.4 W [280 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..........1.86  DEPARTURE.....-1.29  
                         ASOS..............1.88    
TOTAL PRECIPITATION FOR THE YEAR..........32.85  DEPARTURE.....-3.79
                         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 morning low temp. 55F; normal low now 51F
 
* slight correction to sunshine from earlier report, now 89%, was 90%
 
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 24
HIGH 87F IN 1959
LOW 33F IN 1885,1950,1963
PRECIP 1.19 INCHES IN 1955
PEAK GUST 54e MPH SW IN 1940
 
RECORDS FOR SEPTEMBER 25
HIGH 87F IN 1970
LOW 31F IN 1950
PRECIP 2.68 INCHES IN 1961
PEAK GUST 63 MPH SSW IN 1991
 
TODAY'S REPORT PREPARED By: Robert Skilling