BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, AUGUST 18, 2007   
ALL TIMES ARE IN EASTERN STANDARD TIME
 
WINDY AND COOLER TODAY AS DRY AIR MOVES INTO NEW ENGLAND...
NEW RECORD PEAK GUST OF 46 MPH SO FAR FOR AUGUST 18TH...
A total of 0.15 inch of rainfall fell in two rain showers
overnight with peak gusts of 43 mph S at 7:45 PM EDT yesterday
and 1:07 AM EDT today.  There was likely a thunderstorm here
early this morning. Winds are increasing again during the day 
today, with a peak gust so far of 46 mph W at 10:46 AM EDT.
This surpasses the previous record peak gust for the date of
39 mph SW in 1991 (this was the day before Hurricane Bob made 
landfall in southeastern New England).  The dew point has 
dropped into the middle 40s today, and the visibility is again 
very high at 75-80 miles.
 
Today's observations:
 
7 A.M.   
Weather: Clear with distant cirrus and stratocumulus
Temperature: 55F, Dew point: 50F, Wind: W at 15G21 kts
Sea-level pressure: 29.90 inches Hg, rising
Visibility: 75 miles
6-hour min temp: 52 deg. F
24-hour precip: 0.15 inch
BHO SA 1155 CLR 75 125/55/50/2715G21/990/ FEW CI DSNT NE SC 
DSNT W-NNE SCCAS DSNT NNE-E FEW CUFRA ALQDS WND 24V30/ 8/501 
51027 70015 10056 20052
 
10 A.M.   
Weather: Broken stratocumulus
Temperature: 62F, Dew point: 46F, Wind: WNW at 26G40 kts
Sea-level pressure: 29.97 inches Hg, rising
Visibility: 80 miles
Peak gust past hour: 40 kts, 46 mph WNW  
BHO SA 1455 E45 BKN 80 149/62/46/3026G40/997/ FEW CI DSNT NE 
PK WND 3040/46/ 8/501 53024
 

WEATHER SUMMARY FOR FRIDAY, AUGUST 17
 
TEMPERATURE (DEGREES F)
MAX.....78    NORMAL.....79 
MIN.....62    NORMAL.....61
MEAN....70    NORMAL.....70
DEPARTURE FROM 30-YEAR NORMAL..........0
TOTAL DEPARTURE FOR THE MONTH........+31  (+1.6 DEGREES/DAY)
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............43 S   AT 6:45 P.M. 
                   AEROVANE...............39 S   AT 6:45 P.M. 
                   ASOS...................N/A  #
                   DAVIS..................46 S   AT 6:45 P.M. 
FASTEST MILE FOR YESTERDAY................29 S   AT 6:45 P.M.  
MAXIMUM 2-MINUTE ASOS AVERAGE.............N/A  # 
MAXIMUM 2-MINUTE DAVIS AVERAGE............33 S   AT 6:47 P.M.
AVERAGE WIND SPEED AND DIRECTION..........11.3 SSW  
                   ASOS...................N/A  #
                   DAVIS..................11.5  SW [221 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....0.15  DEPARTURE.....+0.02
                         ASOS..............0.12 
TOTAL PRECIPITATION FOR THE MONTH..........0.62  DEPARTURE.....-1.56  
                         ASOS..............0.55    
TOTAL PRECIPITATION FOR THE YEAR..........30.98  DEPARTURE.....-0.61 
                         ASOS.............30.22     
 
PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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
 
8/1  84/67/76/+4/0/851/98     20 NNE    
8/2  92/68/80/+8/0/823/95     21 S     
8/3  92/70/81/+9/0/760/88     28 SSW
8/4  89/71/80/+8/0/827/96     29 WSW  
8/5  80/62/71/-1/0/842/98     23 SSE 
8/6  77/61/69/-3/0.05/129/15  36 SSE  Aero 34 MPH SSE TSTM  
8/7  82/67/75/+4/0.12/410/48  15 SSE 
8/8  88/70/79/+8/0.10/349/41  36 S
8/9  75/60/68/-3/0/722/85     32 NW
8/10 63/53/58/-13/0.19/017/02 16 SSW
8/11 83/52/68/-3/0/743/88     21 WNW
8/12 86/64/75/+4/0/665/79     21 SSW
8/13 83/64/74/+3/0.01/260/31  30 NW   TSTM
8/14 78/58/68/-2/0/812/97     23 NW
8/15 83/59/71/+1/0/651/78     36 SSW  Aero 34 MPH SSW
8/16 87/67/77/+7/0/641/77     33 SSW
8/17 78/62/70/0/.../.../..    43 S    Aero 39 MPH S
 
8/18 morning low temp. 52 deg; normal low now 61 deg.
early morning thunderstorm around 1 AM EDT
 
NEW DAILY RECORDS FOR AUGUST 2007:  
 
None to date
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR AUGUST 18
HIGH 93F IN 2002
LOW 47F IN 1824
PRECIP 5.75 INCHES IN 1955 [DIANE]
PEAK GUST 39 MPH SW 1991
 
RECORDS FOR AUGUST 19
HIGH 90F IN 1906, 1966, 2002
LOW 48F IN 1958
PRECIP 7.02 INCHES IN 1955 [T.S. DIANE - RECORD FOR MONTH]
PEAK GUST 78 MPH ENE 1991 [HURRICANE BOB]
 
TODAY'S REPORT PREPARED By: Mike Iacono