BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, SEPTEMBER 22, 2007    
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.   
Weather: Scattered stratus and overcast cirrus 
Temperature: 61F, Dew point: 59F, Wind: S at 8 kts 
Sea-level pressure: 30.14 inches Hg, steady
Visibility: 4 miles, fog    
6-hour min temp: 60F
24-hour rainfall: 0.00 in 
BHO SA 1155 7 SCT E200 OVC 4F 208/61/59/1908/014/ 
THN SPTS IOVC ALQDS SUN OCNLY DMLY VSBL WND LGT/ 8/601 
55000 10061 20060
 
10 A.M.   
Weather: Scattered cirrus, few cumulus fractus, hazy   
Temperature: 72F, Dew point: 59F, Wind: S at 8 kts 
Sea-level pressure: 30.11 inches Hg, falling
Visibility: 12 miles, hazy 
BHO SA 1455 200 SCT 12 198/72/59/1908/011/ FEW CUFRA 
ALQDS HAZY WND LGT AND VRB/ 8/101 58010 
 
1 P.M.   
Weather: Thin overcast cirrus, few small cumulus
Temperature: 78F, Dew point: 62F, Wind: S at 9 kts  
Sea-level pressure: 30.05 inches Hg, falling
Visibility: 30 miles, hazy
6-hour max. temp: 78F  
6-hour precip: 0.00 in. 
BHO SA 1755 250 –OVC 30 178/78/62/1809/005/ FEW SML CU 
S-NNE HAZY WND 15V22/ 8/101 58020 10078 20061
  
WEATHER SUMMARY FOR FRIDAY, SEPTEMBER 21
 
TEMPERATURE (DEGREES F)
MAX.....77    NORMAL.....69 
MIN.....60    NORMAL.....52
MEAN....69    NORMAL.....60
DEPARTURE FROM 30-YEAR NORMAL.........+9 
TOTAL DEPARTURE FOR THE MONTH........+24  [+0.9 DEGREES/DAY]
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............20   N AT 4:32 A.M.  
                   AEROVANE...............16   N AT 5:04 A.M.   
                   ASOS...................N/A  #
                   DAVIS..................18 NNE AT 4:28 A.M.  
FASTEST MILE FOR YESTERDAY................14   N AT 5:06 A.M. *     
MAXIMUM 2-MINUTE ASOS AVERAGE.............N/A  # 
MAXIMUM 2-MINUTE DAVIS AVERAGE............15 NNE AT 4:49 A.M.   
AVERAGE WIND SPEED AND DIRECTION..........8.5  N 
                   ASOS...................N/A  #
                   DAVIS..................7.7 ENE [57 deg]
* last of several occurrences..
 
# ASOS WINDS SWITCHED OFF BY NWS 6/6, TURNED BACK ON FRIDAY 
9/21 AT 8:30 A.M. EDT.
 
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.....-1.01  
                         ASOS..............1.88    
TOTAL PRECIPITATION FOR THE YEAR..........32.85  DEPARTURE.....-3.49
                         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/+9/0/661/90     20 N
 
9/22 morning low temp. 60F; normal low is now 51F 
 
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 22
HIGH 90F IN 1895, 1914
LOW 30F IN 1904 (Earliest freeze)
PRECIP 1.16 INCHES IN 2001
PEAK GUST 60 MPH SSW IN 1989
 
RECORDS FOR SEPTEMBER 23
HIGH 93F IN 1895,1914
LOW 33F IN 1904
PRECIP 2.67 INCHES IN 1994
PEAK GUST 62 MPH SSW IN 1989
 
TODAY'S REPORT PREPARED By: Mike Iacono