BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JULY 25, 2007   
ALL TIMES ARE IN EASTERN STANDARD TIME

TEMPERATURES WARMING INTO MID-80'S BUT HUMIDITY STILL LOW 

Today's temperatures are running several degrees warmer than
yesterday but the humidity remains low with low 60-degree 
dewpoints dropping to the upper 50's this afternoon. The sky
is scattered with cumulus and thin overcast with cirrus clouds. 
 
Today's observations:
 
7 A.M.   
Weather: High thin broken cirrus clouds, hazy    
Temperature: 69F, Dew point: 62F, Wind: WSW at 06 kts
Sea-level pressure: 30.18 inches Hg, rising
Visibility: 15 miles, hazy 
6-hour min temp: 63F     
24-hour rainfall: 0.00 in. 
BHO SA 1155 220 SCT 250 –BKN 300 –BKN 15 221/69/62/2506/018/
FEW CC HAZY/ 8/001 51009 10069 20063
 
10 A.M.   
Weather: High thin overcast cirrus clouds, clearing west thru north  
Temperature: 81F, Dew point: 63F, Wind: W at 05 kts
Sea-level pressure: 30.20 inches Hg, steady
Visibility: 20 miles, hazy  
BHO SA 1455 250 –BKN 300 –OVC 20 227/81/63/2805/020/ 
FEW SML CU FRMG BINOVC LINE OF CLRG W-N HAZY/ 8/108 51006 

1 P.M. 
Weather: Scattered cumulus including some moderate,
high thin overcast, break distant W-N, hazy  
Temperature: 85F, Dew point: 59F, Wind: SW at 08 kts
Wind: Variable in direction S-WSW  
Sea-level pressure: 30.18 inches Hg, falling
Visibility: 25 miles, hazy    
6-hourly max. temp: 85F    
BHO SA 1755 55 SCT 300 –OVC 25 221/85/59/2208/018/ 
MDT CU BINOVC DSNT W-N HAZY WND 17V25/ 8/208 58006 
10085 20069 
  
WEATHER SUMMARY FOR TUESDAY, JULY 24
 
TEMPERATURE (DEGREES F)
MAX.....82    NORMAL.....82 
MIN.....61    NORMAL.....63
MEAN....72    NORMAL.....73
DEPARTURE FROM 30-YEAR NORMAL.......- 1
TOTAL DEPARTURE FOR THE MONTH.......-17  (-0.9 DEGREES/DAY)
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............25 SW AT 5:12 P.M. *      
                   AEROVANE...............24 SW AT 3:07 P.M. *      
                   ASOS...................N/A  #
                   DAVIS..................29 SSW AT 2:29 P.M.           
FASTEST MILE FOR YESTERDAY................18 SW  AT 2:31 P.M.           
MAXIMUM 2-MINUTE ASOS AVERAGE.............N/A  # 
MAXIMUM 2-MINUTE DAVIS AVERAGE............24 SSW AT 1:39 P.M.            
AVERAGE WIND SPEED AND DIRECTION..........10.9 SW  
                   ASOS...................N/A  #
                   DAVIS..................15.0 NE [038 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..........1.47  DEPARTURE.....-1.43 
                         ASOS..............1.31    
TOTAL PRECIPITATION FOR THE YEAR..........28.45  DEPARTURE.....-0.12
                   ASOS FOR YEAR..........27.77     

PRELIMINARY CLIMATE SUMMARY FOR JULY 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
 
7/1  70/52/61/-9/0.02/649/71/28 W      
7/2  73/50/62/-8/0/841/92/    29 WNW 
7/3  75/53/64/-6/0/839/92/    23 NW 
7/4  78/58/68/-2/0.09/465/51/ 45 SSE 
7/5  80/61/71/ 0/0.25/383/42/ 38 SSE TSTM   
7/6  83/62/73/+2/0.01/482/53/ 46 WNW TSTM  
7/7  81/60/71/0/0/509/56/     32 WSW   
7/8  90/62/76/+5/0.41/563/62/ 36 NW Aero 33 MPH TSTM 
7/9  86/61/74/+3/0.20/354/39  27 NNE TSTM
7/10 80/62/71/0/0/680/75      27 S 
7/11 84/70/77/+5/T/371/41     32 S
7/12 81/64/73/+1/0.01/813/90  27 WNW
7/13 84/62/73/+1/0/695/77     36 WSW
7/14 82/62/72/0/T/765/85      33 SSE
7/15 87/65/76/+4/T/638/71     44 S  Aero 45 MPH S, Davis 48 MPH S     
7/16 84/65/75/+3/0/449/50     18 WNW 
7/17 85/65/75/+3/0/591/66     18 WNW
7/18 71/66/69/-3/0.21/000/00  23 SE   
7/19 83/65/74/+2/0.20/205/23  31 S   
7/20 82/61/72/0/0/330/37      29 WSW
7/21 77/58/68/-4/0/436/49     23 WNW 
7/22 77/61/69/-3/0/826/93     24 ENE   
7/23 64/60/62/-10/0.07/000/00 32 NNE
7/24 82/62/72/-1/0/796/90     25 SW

7/25 morning low temp. 63 deg; normal low now 63 deg. 
     max. temp. thru 2 p.m. EDT is 85 deg. 
  
NEW DAILY RECORDS FOR JULY 2007:  

None to date

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR JULY 25
HIGH 94F IN 1963,1987
LOW 51F IN 1901,1953
PRECIP 2.25 INCHES IN 1990
PEAK GUST 88 MPH NW IN 1972

RECORDS FOR JULY 26
HIGH 97F IN 1963
LOW 47F IN 1920
PRE 2.05 INS IN 1899
WIND 74e MPH NNW IN 1940

TODAY'S REPORT PREPARED By: Robert Skilling and Eli Melaas