BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, AUGUST 13, 2008     
ALL TIMES ARE IN EASTERN STANDARD TIME UNLESS NOTED 
 
A SUNNY AND WARM, DRY DAY AT LAST
VISIBILITY UP TO 70 MILES THIS AFTERNOON
 
After so many days this month with showers and 
thunderstorms and damp weather, today was a 
very welcome change with plenty of sunshine,
low humidity, visibility up to 70 miles, and 
no threat of showers.  A thunderstorm without
any measurable rain yesterday late afternoon brought
the total thunderstorm days to six for the month
and to 32 for the year. 
 
Today's observations:
 
8 A.M. EDT
Weather: Clear, few altocumulus W-NE, few cirrus SE-SW  
Temperature: 63F, Dew point: 59F,  Wind: W at 7 kts
Sea-level pressure: 29.70 inches Hg, rising
Visibility: 35 miles, WNW 60 miles above inversion  
6-hourly minimum temperature: 59F 
24-hourly rainfall: 0.06 in.   
BHO SA 1155 CLR 35 102/63/59/2707/983/ FEW AC W-NE FEW ACC DSNT N 
AND DSNT S FEW CI SE-SW VSBY WNW 60 ABV INVSN 8/081 51006 ASOS 
70005 MANUAL 70006 10063 20059   
  
11 A.M. EDT
Weather: Scattered cumulus, cirrus  
Temperature: 73F, Dew point: 58F, Wind: SW at 8 kts,
Wind: direction variability S-WSW
Sea-level pressure: 29.85 inches Hg, rising
Visibility: 55 miles, NE-SE 35 miles, NW 70 miles   
BHO SA 1455 28 SCT 250 SCT 300 SCT 55 110/73/58/2208/985/ 
MDT CU ALQDS VSBY NW 70 NE-SE 35 WND 18V24/ 8/201 51008
 
2 P.M. EDT
Weather: Thin scattered cirrus, few small cumulus, small moderate
cumulus ci layer ESE-S-W  
Temperature: 77F, Dew point: 56F, Wind: WSW at 7 kts,
Wind: direction variability SSW-W 
Sea-level pressure: 29.83 inches Hg, falling
Visibility: 70 miles   
6-hourly max. temp. 77F 
BHO SA 1755 250 –SCT 70 103/77/56/2407/983/ FEW SML CU/MDT CU 
CI LYR XTDNG ESE-S-W WND 20V27/ 8/201 57007 10077 20063  
 
WEATHER SUMMARY FOR TUESDAY, AUGUST 12
 
TEMPERATURE (DEGREES F)
MAX.....72    NORMAL.....80
MIN.....58    NORMAL.....62
MEAN....65    NORMAL.....71
 
DEPARTURE FROM 30-YEAR NORMAL.............-6 
TOTAL DEPARTURE FOR THE MONTH............-34 [-3.0 DEGREES/DAY]
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............21 N   AT  2:47 A.M.    
                   AEROVANE.............18 WNW AT  5:43 A.M.    
                   ASOS.................21 NW  AT  3:29 A.M.    
                   DAVIS................21 WNW AT  5:42 A.M.         
FASTEST MILE FOR YESTERDAY..............13 WSW AT  9:52 P.M.    
MAXIMUM 2-MINUTE ASOS AVERAGE...........14 WSW AT  9:52 P.M.     
MAXIMUM 2-MINUTE DAVIS AVERAGE..........15 WSW AT  9:51 P.M.    
                   AVERAGE.............9.2 NW  
                   ASOS................8.5    
                   DAVIS...............9.3 WNW [300 deg]  
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.06   DEPARTURE......-0.07  
                         ASOS..............0.05
TOTAL PRECIPITATION FOR THE MONTH..........3.12   DEPARTURE......+1.59  
                         ASOS..............3.18   
TOTAL PRECIPITATION FOR THE YEAR..........34.05   DEPARTURE......+3.11   
                         ASOS.............36.61 #
# Includes erroneous ASOS precipitation data on 2/13/08.
 
PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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
 
8/1  85/66/76/+4/0.00/719/83     16 WSW    
8/2  80/65/73/+1/0.80/346/40     21 NW    TSTM 
8/3  81/61/71/-1/0.56/422/49     52 NW    Aero 55 MPH NW TSTM
8/4  79/60/70/-2/0.01/731/85     25 WNW  
8/5  72/63/68/-4/T/377/44        21 NE  
8/6  64/60/62/-10/0.55/000/00    31 ESE  
8/7  72/61/67/-4/.../009/01      21 SW    TSTM
8/8  77/59/68/-3/.../442/52      23 ENE   TSTM
8/9  78/59/69/-2/0/534/63        16 SSE
8/10 80/61/71/0/0.08/474/56      24 ESE   TSTM 
8/11 67/61/64/-7/0.06/025/03     25 E 
8/12 72/58/65/-6/0.18/.../..     21 NNW   TSTM
 
8/13 morning low temp. 59F; our normal low is now 62F
      
NEW DAILY RECORDS FOR AUGUST
 
8/3 - PEAK GUST OF 52 MPH FROM THE NW IS NEW RECORD FOR THE
      DATE; PREVIOUS RECORD 41 MPH NE IN 1964
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR AUGUST 13
HIGH 98F IN 1944, 2002
LOW 47F IN 1902, 1957
PRECIP 2.92 INCHES IN 1989
PEAK GUST 52 MPH SSE IN 1963
 
RECORDS FOR AUGUST 14
HIGH 99F IN 2002
LOW 46F IN 1964
PRECIP 3.06 INCHES IN 1919
PEAK GUST 61 MPH WNW IN 1963
 
TODAY'S REPORT PREPARED By: Robert Skilling