BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, AUGUST 26, 2008     
ALL TIMES ARE IN EASTERN STANDARD TIME UNLESS NOTED  
 
SUNNY, MUCH COOLER AND DRIER WITH 80 MILES VISIBILITY
ANOTHER VERY SUNNY DAY--AUGUST TURNS INTO A SUNNY MONTH
 
After the very warm and humid weather of yesterday, a 
cold frontal passage ushered in much cooler and much 
drier air overnight and early today.  Dew points have 
dropped from the 60's to the 40's and visibility has 
gone up from only 12 miles yesterday in haze to an 
unlimited 80 miles today.
  
Since mid-August very sunny days have prevailed. After 
only 43% of the possible sunshine during the month's 
first half the next ten days averaged 90%. This included
six days with between 92 and 99% and today will make 
number seven.   
 
Today's observations:
 
8 A.M. EDT
Weather: Clear, few stratocumulus along horizon distant northwest,
few cumulus, stratocumulus along horizon distant east through the
east-southeast, cirrus along horizon distant SSE-S 
Temperature: 56F, Dew point: 49F,  Wind: WNW at 11 kts 
Sea-level pressure: 30.01 inches Hg, rising 
Visibility: 75 miles   
6-hourly minimum temperature: 52F 
24-hourly rainfall: 0.00 inches
BHO SA 1155 CLR 75 163/56/49/3011/001/ FEW SC DSNT NW 
ALG HRZN OVR MTNS FEW CU/SC OFFSHR DSNT E-ESE CI DSNT 
SSE-S ALG HRZN/ 8/801 53014 10056 20052  
 
11 A.M. EDT
Weather: Clear, small distant cumulus, few moderate distant 
ESE, distant cirrus SSE-SSW and SW-NW 
Temperature: 65F, Dew point: 46F, Wind: NW at 11G20 kts 
Wind: direction variable W to N 
Sea-level pressure: 30.02 inches Hg, rising
Visibility: 80 miles
BHO SA 1455 CLR 80 166/65/46/3111G20/002/ CUFRA/SML CU 
DSNT FEW MDT CU ALG/OFFSHR DSNT ESE CI DSNT SSE-SSW 
ALG HRZN CI SW-NW WND 27V35/ 8/201 51003  
 
2 P.M. EDT
Weather: Thin scattered cirrus, patches dense cirrus distant NW, 
cumulus fractus and small cumulus all parts of the sky  
Temperature: 70F, Dew point: 49F, Wind: WNW at 7 kts
Direction: Variability WSW-NNW   
Sea-level pressure: 30.01 inches Hg, falling
Visibility: 80 miles   
6-hourly max. temp. 71F
BHO SA 1755 250 –SCT 80 163/70/49/2907/001/ FEW CUFRA/SML CU 
PTCH DENS CI DSNT NW WND 25V34 GST TO 20 KTS PST HR/ 
8/102/ 58003 10071 20056
  
WEATHER SUMMARY FOR MONDAY, AUGUST 25
 
TEMPERATURE (DEGREES F)
MAX.....82    NORMAL.....77
MIN.....58    NORMAL.....59
MEAN....70    NORMAL.....68
 
DEPARTURE FROM 30-YEAR NORMAL.............+2
TOTAL DEPARTURE FOR THE MONTH............-37 [-1.7 DEGREES/DAY]
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............28  NNW AT  8:13 P.M.       
                   AEROVANE.............28  NNW AT  8:13 P.M.          
                   ASOS.................28  NNW AT  8:13 P.M.       
                   DAVIS................29  NW  AT  8:29 P.M.            
FASTEST MILE FOR YESTERDAY..............20  NNW AT  8:15 P.M.         
MAXIMUM 2-MINUTE ASOS AVERAGE...........20  NNW AT  8:17 P.M.           
MAXIMUM 2-MINUTE DAVIS AVERAGE.......   21  NNW AT  8:16 P.M.         
                   AVERAGE.............11.8 W 
                   ASOS................11.2  
                   DAVIS...............12.4 WSW [250 deg]  
 
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..........4.50   DEPARTURE......+1.28 
                         ASOS..............4.55   
TOTAL PRECIPITATION FOR THE YEAR..........35.43   DEPARTURE......+2.80  
                         ASOS.............37.98 #
#  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/-4/0.41/009/01     21 SW    TSTM
8/8  77/59/68/-3/0.47/442/52     23 ENE   TSTM
8/9  78/59/69/-2/0.00/534/63     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/-6/0.18/134/16     21 NNW   TSTM 
8/13 79/59/69/-2/0.00/778/93     18 WSW
8/14 78/63/71/+1/T/334/40        21 NNW   
8/15 79/62/71/+1/1.32/125/15     18 SSW   TSTM
8/16 79/61/70/0/0.01/647/78      23 WSW
8/17 80/59/70/0/0.00/787/95      28 WSW 
8/18 85/64/75/+5/0.00/759/92     28 SSW 
8/19 78/54/66/-4/0.05/576/70     29 WNW   TSTM
8/20 72/50/61/-8/0.00/812/99     28 WNW
8/21 78/55/67/-2/0.00/801/98     16 WNW
8/22 82/60/71/+2/0.00/799/98     20 S
8/23 80/60/70/+1/0.00/771/95     21 S 
8/24 80/60/70/+1/0.00/697/86     18 S
8/25 82/58/70/+2/0.00/258/32     28 NNW
 
8/26 our morning low temp. 52F; the normal low is now 59F 
      
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 26
HIGH 96 IN 1900, 1948
LOW 46F IN 1885
PRECIP 5.85 INCHES IN 1924
PEAK GUST 55e MPH NNW 1947
 
RECORDS FOR AUGUST 27
HIGH 99F IN 1948
LOW 44F IN 1885
PRECIP 2.77 INCHES IN 1946
PEAK GUST 48 MPH NW 1983
 
TODAY'S REPORT PREPARED By: Robert Skilling