BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, AUGUST 4, 2007   
ALL TIMES ARE IN EASTERN STANDARD TIME
 
WARM AND HUMID WEATHER CONTINUES WITH COLD FRONT EXPECTED
LATER TODAY...
The low temperature of 71 this morning was again just one degree 
short of the record high minimum for the date of 72 set in 1974.
There were thunderstorms in the area Friday evening, but there
was no rain at the Observatory yesterday.  There are a few cirrus
in the hazy sky at mid-morning, and there is another chance of 
thunderstorms this evening from an approaching cold front.  
 
Today's observations:
 
7 A.M.   
Weather: Clear, hazy
Temperature: 75F, Dew point: 68F, Wind: SSW at 10 kts
Sea-level pressure: 29.95 inches Hg, rising
Visibility: 10 miles, hazy
6-hour min temp: 71F     
24-hour rainfall: None 
BHO SA 1155 CLR 10 141/75/68/2210/995/ HAZY WND 19V25/ 53007 10075 
20071
 
10 A.M.   
Weather: Thin scattered cirrus, hazy
Temperature: 84F, Dew point: 67F, Wind: WSW at 6 kts
Sea-level pressure: 29.95 inches Hg, steady
Visibility: 10 miles, hazy
BHO SA 1455 250 ñSCT 10 141/84/67/2406/995/ HAZY WND LGT AND VRB/ 
8/001 54000
 
1 P.M.   
Weather: Scattered cumulus congestus, towering cumulus NE-ESE
Temperature: 85F, Dew point: 65F, Wind: W at 12 kts  
Sea-level pressure: 29.91 inches Hg, falling
Visibility: 10 miles, hazy
6-hour max temp: 88F
BHO SA 1755 50 SCT 10 127/85/65/2612/991/ CU CONG ALQDS 
TCU DSNT NE-SSE HAZY/ 8/200 58014 10088 20075
 
WEATHER SUMMARY FOR FRIDAY, AUGUST 3
 
TEMPERATURE (DEGREES F)
MAX.....92    NORMAL.....81 
MIN.....70    NORMAL.....63
MEAN....81    NORMAL.....72
DEPARTURE FROM 30-YEAR NORMAL.........+9
TOTAL DEPARTURE FOR THE MONTH........+21  (+5.8 DEGREES/DAY)
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............28  SSW AT  2:27 P.M.*  
                   AEROVANE...............27  SSW AT  2:27 P.M.         
                   ASOS...................N/A  #
                   DAVIS..................33  SSW AT 12:17 P.M           
FASTEST MILE FOR YESTERDAY................23  SSW AT  4:00 P.M.           
MAXIMUM 2-MINUTE ASOS AVERAGE.............N/A  # 
MAXIMUM 2-MINUTE DAVIS AVERAGE............25  SSW AT  2:29 P.M.             
AVERAGE WIND SPEED AND DIRECTION.........13.2 SSW   
                   ASOS...................N/A  #
                   DAVIS.................13.3 SSW [195 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.....-0.12
                         ASOS..............0.00 
TOTAL PRECIPITATION FOR THE MONTH..........0.00  DEPARTURE.....-0.36 
                         ASOS..............0.00    
TOTAL PRECIPITATION FOR THE YEAR..........30.36  DEPARTURE.....+0.59
                   ASOS FOR YEAR..........29.67     
 
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/+4/0/782/94     20 NNE   Aero 17 MPH S
8/2  92/68/80/+8/0/.../..     21 S     
8/3  92/70/81/+9/0/.../..     28 SSW
 
8/4 morning low temp. 71 deg; normal low now 63 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 4
HIGH 95F IN 1928
LOW  48F IN 1900
PRECIP 1.68 INS IN 1983
PEAK GUST 48 MPH SW IN 1974
 
RECORDS FOR AUGUST 5
HIGH 98F IN 1955
LOW  48F IN 1929,1972
PRECIP 3.03 INCHES IN 1893
PEAK GUST 60e MPH SW 1977
 
TODAY'S REPORT PREPARED By: Mike Iacono/Eli Melaas