BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, JULY 16, 2007   
ALL TIMES ARE IN EASTERN STANDARD TIME
 
STRONG SOUTH WINDS REACHED GUSTS OF GALE FORCE ON JULY 15; 
WIND GUSTS RECORDED OVER 40 MPH FOR AN HOUR AND A HALF
ONLY A TRACE OF RAIN LAST EVENING
 
Increasing south winds by early afternoon yesterday 
were reaching gusts of over 40 MPH from about 2 p.m. 
to 3:30 p.m. EDT.  Our peak gusts are as follows:
 
Times in EDT
Davis 48 MPH S @ 2:18 PM 
Maximum, Inc. Merlin 46 MPH S
Maximum, Inc. Maestro 45 MPH S 
Aerovane 45 MPH S @ 2:18 PM 
NWS 420C 44 MPH S @ 2:18 PM & 3:12 PM 
 
The sustained 2-minute and fastest mile winds were both 36 MPH S 
close to 2:20 PM. The highest hourly averages were 27 MPH and 
26 MPH between 2 and 4 PM.   
 
The heavy showers and thunderstorms with severe weather 
which occurred to our west through north yesterday afternoon 
had dissipated to just a few very light showers which moved 
through here early last evening. 
 
Today's observations:
 
7 A.M.   
Weather: Overcast with breaks 
Temperature: 69F, Dew point: 58F, Wind: WNW at 06 kts 
Sea-level pressure: 29.96 inches Hg, rising
Visibility: 30 miles, 20 NE, 55 WNW, light haze    
6-hour min temp: 65F     
24-hour rainfall: trace   
BHO SA 1155 90 SCT E130 OVC 30 146/69/58/3006/996/ 
FEW LWR ACC BINOVC HAZY VSBY NE 20 WNW 55 LGT HZ/ 
8/08/ 51017 10069 20065
 
10 A.M.   
Weather: Scattered clouds, haze aloft    
Temperature: 75F, Dew point: 57F, Wind: WNW at 04 kts 
Wind: Light  
Sea-level pressure: 29.98 inches Hg, rising
Visibility: 35 miles, WNW 55, NE 25, light haze  
BHO SA 1455 85 SCT 250 SCT 35 154/75/57/2904/998/ 
FEW ACC HZ ALF WND LGT/ 8/081 51008
 
1 P.M.   
Weather: Scattered clouds 
Temperature: 81F, Dew point: 52F, Wind: WSW at 07 kts 
Wind: Variable SW-WNW   
Sea-level pressure: 29.97 inches Hg, falling
Visibility: 50 miles, NW 60  
6-hourly max. temp: 81 deg. 
BHO SA 1755 180 SCT 50 149/81/52/2507/997/ FEW CUFRA/CU W-N 
FEW LWR ACC SE-S VSBY NW 60 WND 22V29/ 8/180 58005 10081 20069
 
WEATHER SUMMARY FOR SUNDAY, JULY 15
 
TEMPERATURE (DEGREES F)
MAX.....87    NORMAL.....82 
MIN.....65    NORMAL.....62
MEAN....76    NORMAL.....72
DEPARTURE FROM 30-YEAR NORMAL.......+4
TOTAL DEPARTURE FOR THE MONTH.......-4  (-0.1 DEGREES/DAY)
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............44 S   AT 2:12 P.M. *     
                   AEROVANE...............45 S   AT 1:18 P.M.     
                   ASOS...................N/A  #
                   DAVIS..................48 S   AT 1:18 P.M.          
FASTEST MILE FOR YESTERDAY................36 S   AT 1:19 P.M.       
MAXIMUM 2-MINUTE ASOS AVERAGE.............N/A  # 
MAXIMUM 2-MINUTE DAVIS AVERAGE............36 S   AT 1:20 P.M.           
AVERAGE WIND SPEED AND DIRECTION........16.0 S  
                   ASOS...................N/A  #
                   DAVIS................14.5 S [180 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...trace  DEPARTURE.....-0.12
                         ASOS..............0.00 
TOTAL PRECIPITATION FOR JULY...............0.99  DEPARTURE.....-0.83 
                         ASOS..............0.91    
TOTAL PRECIPITATION FOR THE YEAR..........27.97  DEPARTURE.....+0.48 
                   ASOS FOR YEAR..........27.32    
 
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/.../..    36 WSW
7/14 82/62/72/0/T/.../..     33 SSE
7/15 87/65/76/+4/T/638/71    44 S Aero 45 MPH S, Davis 48 MPH S     
 
7/16 morning low temp. 65 deg; normal low now 62 deg.
 
*7/11 sunshine mins. and % corrected from 383 and 43%
 7/12 sunshine mins. corrected from 810
 
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 16
HIGH 94F IN 1968, 1980, 1983, 1999
LOW 50F IN 1889, 1903
PRECIP 0.89 INS IN 1919
WIND 48e MPH SW 1944
 
RECORDS FOR JULY 17
HIGH 96F IN 1999
LOW 47F IN 1892
PRECIP 1.39 INS IN 1989
WIND 46 MPH WNW IN 1971
 
TODAY'S REPORT PREPARED By: Robert Skilling