BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JULY 30, 2008     
ALL TIMES ARE IN EASTERN STANDARD TIME UNLESS NOTED 
 
ANOTHER GREAT LATE JULY WEATHER DAY WITH 
BRIGHT SUNSHINE, TEMPS. IN THE 80'S AND 
LOW HUMIDITY, DEWPOINTS IN UPPER 50'S
EXCELLENT VISIBILITY UP TO 70 MILES
 
Today was the third in the series of fine late July
days with slightly above normal temperatures
and even slightly drier air than yesterday with our 
dew points dropping to the upper 50's.  Visibility 
increased to 50 to 70 miles after two days of light haze. 
 
Today's observations:
 
8 A.M. EDT
Weather: High thin scattered cirrus, lower dense cirrus in patches,
altocumulus castellanus, floccus, W-N-E, few to south  
Temperature: 69F, Dew point: 60F,  Wind: NNW at 6 kts 
Sea-level pressure: 29.88 inches Hg, rising
Visibility: 50 miles, 70 miles NW, lower visibility NE-SE  
6-hourly minimum temperature: 65F 
24-hourly rainfall: 0.00 inches
BHO SA 1155 250 –SCT 300 –SCT 50 120/69/60/3306/988/ 
ACC W-N-E FEW S PTCHS DENS CI VSBY NW 70 LWR NE-SE/ 
8/082 53003 10069 20065  
 
11 A.M. EDT
Weather: Clear, small cumulus forming, cirrus S-W-N   
Temperature: 77F, Dew point: 59F,  Wind: W at 4 kts,
Sea-level pressure: 29.86 inches Hg, falling
Visibility: 70 miles
BHO SA 1455 CLR 70 112/77/59/2704/986/
FEW SML CU FRMG ALQDS CI S-W-N/ 8/101 58008
 
2 P.M. EDT
Weather: Scattered cumulus, thin broken cirrus, cirrostratus 
Temperature: 82F, Dew point: 59F,  Wind: SW at 3 kts [estimated]
Sea-level pressure: 29.82 inches Hg, falling
Visibility: 65 miles 
6-hour max. temp. 83F 
BHO SA 1755 50 SCT 150 SCT 250 –SCT 300 –BKN 65 098/82/59/E2303/982/
FEW MDT CU TOPS FEW ACSL NE/ 8/246 58014 10083 20069
 
WEATHER SUMMARY FOR TUESDAY, JULY 29
 
TEMPERATURE (DEGREES F)
MAX.....84    NORMAL.....82
MIN.....66    NORMAL.....63
MEAN....75    NORMAL.....72

DEPARTURE FROM 30-YEAR NORMAL............+ 3 
TOTAL DEPARTURE FOR THE MONTH............+75 [+2.4 DEGREES/DAY]
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............24 W   AT  8:49 A.M.    
                   AEROVANE.............23 W   AT  8:49 A.M.     
                   ASOS.................23 W   AT  8:49 A.M.     
                   DAVIS................25 W   AT  8:48 A.M.        
FASTEST MILE FOR YESTERDAY..............16 W   AT  3:38 P.M. * 
MAXIMUM 2-MINUTE ASOS AVERAGE...........17 W   AT  3:30 P.M.     
MAXIMUM 2-MINUTE DAVIS AVERAGE..........19 W   AT  3:30 P.M.     
                   AVERAGE............10.8 W    
                   ASOS................9.9      
                   DAVIS..............11.4 W [260 deg] 
* last of several occurrences...
 
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..........5.85   DEPARTURE......+2.35  
                         ASOS..............5.96   
TOTAL PRECIPITATION FOR THE YEAR..........30.85   DEPARTURE......+1.68   
                         ASOS.............33.34 #
# Includes erroneous ASOS precipitation data on 2/13/08.
 
PRELIMINARY CLIMATE SUMMARY FOR JULY 2008 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane recording wind system gust when significant
TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
 
7/1  83/66/75/+5/0.15/411/45     28 SSW   TSTM
7/2  84/61/73/+3/1.02/593/65     44 W     TSTM Small hail
7/3  85/63/74/+4/T/793/87        45 SW    Aero 44 MPH SW
7/4  69/59/64/-6/0.22/018/02     25 NE
7/5  70/62/66/-5/0.01/000/00     17 E
7/6  81/65/73/+2/0/245/27        20 S
7/7  86/67/77/+6/0/563/62        21 S
7/8  89/69/79/+8/0/753/83        30 SSE  
7/9  88/70/79/+8/T/734/81        36 SSW   TSTM Aero 35 MPH SSW
7/10 82/65/74/+3/T/887/98        28 W     Aero 29 MPH W
7/11 83/61/72/0/0/759/84         17 NW   
7/12 82/65/74/+2/0/631/70        28 S  
7/13 81/66/74/+2/0/784/87        38 S     Aero 40 MPH S  
7/14 80/67/74/+2/0.36/468/52     23 W     TSTM 
7/15 87/67/77/+5/0/799/89        22 SSW
7/16 88/66/77/+5/0/869/97        22 SSE
7/17 86/68/77/+5/0/805/90        20 SW   
7/18 91/66/79/+7/0.03/679/76     23 SE    TSTM
7/19 93/66/80/+8/T/589/66        35 WSW   Aero 35 WSW
7/20 88/71/80/+8/0.18/178/20     27 NNW   TSTM  
7/21 84/65/74/+3/0.07/480/54     25 NNE 
7/22 78/63/71/-1/0.13/496/56     21 WSW
7/23 70/63/67/-5/0.75/0/0        28 NE    TSTM 
7/24 81/67/74/+1/2.27/044/05     43 S     TSTM Aero 47 MPH S
7/25 82/65/74/+1/0/670/76        23 SSE
7/26 85/65/75/+3/0/800/91        30 S 
7/27 78/61/70/-2/0.66/149/17     43 WSW   Aero 44 MPH WSW TSTM 
7/28 83/61/72/0/0/.../..         23 WSW 
7/29 84/66/75/+3/0/.../..        24 W
 
7/30 our morning low temp. 65F; the normal low is now 63F 
   
NEW DAILY RECORDS FOR JULY
 
7/24 - PEAK GUST OF 43 MPH FROM THE SOUTH IS NEW REOCRD FOR THE
       DATE; PREVIOUS RECORD 41 MPH S IN 1975, 41e MPH WSW IN 1977
7/24 - DAILY PRECIPITATION 2.27 INCHES IS NEW RECORD FOR THE DATE;
       PREVIOUS RECORD WAS 2.21 INCHES IN 1988
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR JULY 30
HIGH 99F IN 1949
LOW 51F IN 1956
PRECIP 1.84 INCHES IN 1976
PEAK GUST 70e MPH SW 1944
 
RECORDS FOR JULY 31
HIGH 95F IN 1917
LOW 50F IN 1895,1918
PRECIP 1.34 INCHES IN 1892
PEAK GUST 43e MPH WNW IN 1953, 43 SW IN 1971
 
TODAY'S REPORT PREPARED By: Robert Skilling