BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, JULY 19, 2007   
ALL TIMES ARE IN EASTERN STANDARD TIME
 
SUNSHINE THROUGH HIGH CLOUDS WHICH HAVE BEEN PARTLY THIN UNTIL 2PM
VERY HAZY WITH VISIBILITY ONLY 8 TO 10 MILES EARLY AFTERNOON
TEMPERATURES REACH LOW 80'S WITH DEWPOINTS IN THE MID-60'S
 
Partial sunshine has been recorded since early morning stratus
burned off by mid-morning as high cloudiness has prevailed which 
has contained varying amounts of transparencies. Clouds are 
thickening early this afternoon ahead of a line of showers and 
thunderstorms entering western New England. Our visibility 
is limited by lots of haze since the early morning fog burned off. 
Temperatures have reached the lower 80's with moderate humidity 
as dewpoints remain near 66 degrees. 
 
Today's observations:
 
7 A.M.   
Weather: Partial obscurement/fog with breaks in overcast
Temperature: 68F, Dew point: 67F, Wind: W at 05 kts 
Sea-level pressure: 29.84 inches Hg, rising
Visibility: 2 miles, variable 2-3 miles
6-hour min temp: 65F     
24-hour rainfall: 0.21 in.  
BHO SA 1155 -X E9  E3 BKN 250 OVC 2VF 105/68/67/2805/984/ 
F3 THN SPTS IOVC FG DSSPTNG RPDLY VSBY 2V3/ 
8/607 51008 MANUAL 70021 ASOS 70020 10068 20065
 
10 A.M.   
Weather: Overcast, partly thin
Temperature: 73F, Dew point: 66F, Wind: S at 05 kts 
Sea-level pressure: 29.82 inches Hg, falling
Visibility: 9 miles
BHO SA 1455 15 SCT E220 BKN 250 OVC 9 099/73/66/1805/982/ 
OVC PTLY THN SE-SW HAZY WND LGT/ 8/507 56008
 
1 P.M.   
Weather: Overcast with thin spots and breaks overhead
Temperature: 81F, Dew point: 66F, Wind: SSE at 10 kts 
Sea-level pressure: 29.77 inches Hg, falling
Visibility: 9 miles, 8 N-NE, 10 S-SSW hazy     
6-hourly max. temp: 82 deg.   
6-hour rainfall: 0.00 in.
BHO SA 1755 30 SCT E140 BKN 180 BKN 250 OVC 9 081/81/66/1510/977/ 
MDT CU BINOVC OVHD AND OVC PTLY THN OVHD-E VSBY N-NE 8 S-SSW 10 
HZY WND 12V19/ 8/231 58019 10082 20068
 
WEATHER SUMMARY FOR WEDNESDAY, JULY 18
 
TEMPERATURE (DEGREES F)
MAX.....71    NORMAL.....82 
MIN.....66    NORMAL.....62
MEAN....69    NORMAL.....72
DEPARTURE FROM 30-YEAR NORMAL.......-3
TOTAL DEPARTURE FOR THE MONTH.......-1  (-0.1 DEGREES/DAY)
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............23 SE  AT  4:53 P.M.      
                   AEROVANE...............20 SE  AT  4:53 P.M.     
                   ASOS...................N/A  #
                   DAVIS..................23 SE  AT  4:53 P.M.          
FASTEST MILE FOR YESTERDAY................16 SE  AT  4:52 P.M.       
MAXIMUM 2-MINUTE ASOS AVERAGE.............N/A  # 
MAXIMUM 2-MINUTE DAVIS AVERAGE............17 SE  AT  4:53 P.M.           
AVERAGE WIND SPEED AND DIRECTION.........7.9 SE  
                   ASOS...................N/A  #
                   DAVIS.................8.1 SSE [148 deg]  
 
# 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... 0.21 DEPARTURE......+0.09
                         ASOS..............0.20 
TOTAL PRECIPITATION FOR JULY...............1.20  DEPARTURE.....-0.98 
                         ASOS..............1.11    
TOTAL PRECIPITATION FOR THE YEAR..........28.18  DEPARTURE.....+0.33 
                   ASOS FOR YEAR..........27.52    
 
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/.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/.../..    18 WNW
7/18 71/66/69/-3/0.21/000/00 23 SE  
 
7/19 morning low temp. 65 deg; normal low now 63 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 19
HIGH 96F IN 1977, 1991
LOW 50F IN 1890
PRE 1.10 INS IN 1951
WIND 63 MPH SSW IN 1982
 
RECORDS FOR JULY 20
HIGH 99F IN 1991
LOW 47F IN 1890
PRE 1.64 INS IN 1938
WIND 56e MPH SSW IN 1943
 
TODAY'S REPORT PREPARED By: Stephanie Radner/Robert Skilling