BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, AUGUST 17, 2007   
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.   
Weather: Overcast cirrus, scattered altocumulus
Temperature: 71F, Dew point: 68F, Wind: W at 08 kts
Sea-level pressure: 29.86 inches Hg, rising
Visibility: 8 miles, haze
6-hour min temp: 70 deg. F
24-hour precip: None
BHO SA 1155 100 SCT E200 OVC 8 110/71/68/2708/986/ 
DENSE CI HAZY/ 8/052 51011 10071 20070
 
10 A.M.   
Weather: Overcast with breaks overhead
Temperature: 74F, Dew point: 58F, Wind: WSW at 11 kts
Sea-level pressure: 29.87 inches Hg, rising
Visibility: 15 miles, haze   
BHO SA 1455 E140 BKN 200 OVC 15 114/74/58/2411/987/ 
BRKS OVHD FEW MDT CU FRMG NNW-E HAZY/ 8/27/ 50004
 
1 P.M.
Weather: Broken altocumulus
Temperature: 75F, Dew point: 53F, Wind: SW at 08 kts
Wind: variabile direction S-W
Sea-level pressure: 29.84 inches Hg, falling
Visibility: 70 miles, light haze  
6-hour max temp: 77 deg. F
BHO SA 1755 E140 BKN 70 106/75/53/2208/984/ FEW MDT CU FRMG NW-NE 
FEW CU ESE LGT HZ WND 17V27/ 8/230 58008 10077 20071 
 
WEATHER SUMMARY FOR THURSDAY, AUGUST 16
 
TEMPERATURE (DEGREES F)
MAX.....87    NORMAL.....79 
MIN.....67    NORMAL.....61
MEAN....77    NORMAL.....70
DEPARTURE FROM 30-YEAR NORMAL........ +7
TOTAL DEPARTURE FOR THE MONTH........+31  (+1.7 DEGREES/DAY)
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............33 SSW AT 2:37 P.M.  
                   AEROVANE...............32 SSW AT 2:45 P.M.   
                   ASOS...................N/A  #
                   DAVIS..................37 SSW AT 2:36 P.M. 
FASTEST MILE FOR YESTERDAY................25 S   AT 3:29 P.M.  
MAXIMUM 2-MINUTE ASOS AVERAGE.............N/A  # 
MAXIMUM 2-MINUTE DAVIS AVERAGE............28 S   AT 2:32 P.M.
AVERAGE WIND SPEED AND DIRECTION..........12.7 S  
                   ASOS...................N/A  #
                   DAVIS..................12.2 SSW [201 deg.]   
* last of several occurrences...
 
# ASOS WINDS SWITCHED OFF BY NWS 6/6, IT IS NOT KNOWN WHEN 
  THAT DATA WILL RESUME
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE.....-0.13
                         ASOS..............0.00 
TOTAL PRECIPITATION FOR THE MONTH..........0.47  DEPARTURE.....-1.58  
                         ASOS..............0.43    
TOTAL PRECIPITATION FOR THE YEAR..........30.83  DEPARTURE.....-0.63 
                   ASOS FOR YEAR..........30.10    
 
PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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
 
8/1  84/67/76/+4/0/851/98     20 NNE    
8/2  92/68/80/+8/0/823/95     21 S     
8/3  92/70/81/+9/0/760/88     28 SSW
8/4  89/71/80/+8/0/827/96     29 WSW  
8/5  80/62/71/-1/0/842/98     23 SSE 
8/6  77/61/69/-3/0.05/129/15  36 SSE Aero 34 MPH SSE TSTM  
8/7  82/67/75/+4/0.12/410/48  15 SSE 
8/8  88/70/79/+8/0.10/349/41  36 S
8/9  75/60/68/-3/0/722/85     32 NW
8/10 63/53/58/-13/0.19/017/02 16 SSW
8/11 83/52/68/-3/0/743/88     21 WNW
8/12 86/64/75/+4/0/665/79     21 SSW
8/13 83/64/74/+3/0.01/260/31  30 NW  TSTM
8/14 78/58/68/-2/0/812/97     23 NW
8/15 83/59/71/+1/0/651/78     36 SSW  Aero 34 MPH SSW
8/16 87/67/77/+7/0/641/77     33 SSW
 
8/17 morning low temp. 70 deg; normal low now 61 deg.  
 
NEW DAILY RECORDS FOR AUGUST 2007: 
 
None to date
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR AUGUST 17
HIGH 97F IN 1944
LOW 48F IN 1902
PRECIP 2.17 INCHES IN 1998
PEAK GUST 50e MPH SSW IN 1952, 50 MPH WNW IN 1962
 
RECORDS FOR AUGUST 18
HIGH 93F IN 2002
LOW 47F IN 1824
PRECIP 5.75 INCHES IN 1955 [DIANE]
PEAK GUST 39 MPH SW 1991
 
TODAY'S REPORT PREPARED By: Eli Melaas and Stephanie Radner