BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, AUGUST 13, 2007   
ALL TIMES ARE IN EASTERN STANDARD TIME
 
A cold front passed through southern New England early this afternoon 
bringing showers and scattered thundershowers to the area. However, 
only 0.01 inch of precipitation had been recorded through the last 
observation at Blue Hill. The maximum temperature was 82 degrees and 
wind was light from the SW. A high pressure system is expected to move 
in tommorow bringing dry, comfortable and sunny weather.
 
Today's observations:
 
7 A.M.   
Weather: Overcast altostratus, few altocumulus castellanus,
dense cirrus, small break in the overcast distant SE
Temperature: 68F, Dew point: 64F, Wind: W at 8 kts
Sea-level pressure: 29.85 inches Hg, steady
Visibility: 15 miles, light rain showers, haze 
6-hour min temp: 68 deg. F
24-hour precip: Trace    
BHO SA 1155 70 SCT E130 OVC 15RW- 107/68/64/2608/985/ ACC OVHD-E-S 
HIER DENS CI VSB DSNT E-SE SML BINOVC DSNT ESE-SE HAZY VSBY W-N 12 
SE 25 RB52/ 8/082 55002 MANUAL 6000/ 10069 20068
 
10 A.M.   
Weather: Broken altocumulus, altocumulus castellanus and dense cirrus
Temperature: 73F, Dew point: 65F, Wind: WSW at 5 kts 
Sea-level pressure: 29.83 inches Hg, falling
Visibility: 15 miles, hazy  
3-hour precip: 0.01 in
BHO SA 1455 E10 BKN 20 BKN 15 102/73/65/2505/983/ FEW CU FRMG DSNT 
WNW-N ACC ALQDS DENS CI E-S THN K LYR N-NE VSBY W-NW 20 SE-S 10 HAZY/
8/182/ 58005 MANUAL 6001/
 
1 P.M.
Weather: Towering cumulus, cumulonimbus tops, rumbles of thunder heard 
between 1 and 2 P.M. from the distant NW
Temperature: 82F, Dew point: 65F, Wind: SSW at 9 kts
Wind: Variability S-WSW
Sea-level pressure: 29.79 inches Hg, falling
Visibility: 20 miles, hazy
6-hour max temp: 82 deg. F
BHO SA 1755 50 SCT 70 SCT 100 SCT 200 SCT 20 089/82/65/2109/979/ 
TB20E40 DSNT NW DSSPTD CBS DSNT W-N MOVG E CB ANVIL TOPS W-N TCU/MOD CU 
DSNT SW-NW-NE FEW ACSL VSBY DCRSNG NNW 12 VIRGA DSNT W-N HAZY WND 18V25/ 
8/263 58013 MANUAL 6001/ 10082 20067
 
WEATHER SUMMARY FOR SUNDAY, AUGUST 12
 
TEMPERATURE (DEGREES F)
MAX.....86    NORMAL.....80 
MIN.....64    NORMAL.....62
MEAN....75    NORMAL.....71
DEPARTURE FROM 30-YEAR NORMAL........ +4
TOTAL DEPARTURE FOR THE MONTH........+22  (+1.6 DEGREES/DAY)
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............21 SSW AT 10:53 P.M. * 
                   AEROVANE...............18 SSW AT 10:53 P.M. *  
                   ASOS...................N/A  #
                   DAVIS..................23 S   AT 9:11  P.M.
FASTEST MILE FOR YESTERDAY................14 SSW AT 10:37 P.M. *  
MAXIMUM 2-MINUTE ASOS AVERAGE.............N/A  # 
MAXIMUM 2-MINUTE DAVIS AVERAGE............18 SSW AT 10:37 P.M.
AVERAGE WIND SPEED AND DIRECTION..........7.6 NW  
                   ASOS...................N/A  #
                   DAVIS..................8.0 W [264 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.....-0.13
                         ASOS..............0.00 
TOTAL PRECIPITATION FOR THE MONTH..........0.46  DEPARTURE.....-1.08  
                         ASOS..............0.43    
TOTAL PRECIPITATION FOR THE YEAR..........30.82  DEPARTURE.....-0.13 
                   ASOS FOR YEAR..........30.10    
 
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/.../..     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/.../..  15 SSE 
8/8  88/70/79/+8/0.10/.../..  36 S
8/9  75/60/68/-3/0/.../..     32 NW
8/10 63/53/58/-13/0.19/.../.. 16 SSW
8/11 83/52/68/-3/0/.../..     21 WNW
8/12 86/64/75/4/0/.../..      21 SSW
 
8/13 morning low temp. 67 deg; normal low now 62 deg.  
     
* Sunshine data corrected from previously reported values.
 
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 13
HIGH 98F IN 1944, 2002
LOW 47F IN 1902, 1957
PRECIP 2.92 INCHES IN 1989
PEAK GUST 52 MPH SSE IN 1963
 
RECORDS FOR AUGUST 14
HIGH 99F IN 2002
LOW 46F IN 1964
PRECIP 3.06 INCHES IN 1919
PEAK GUST 61 MPH WNW IN 1963
 
TODAY'S REPORT PREPARED By: Robert Skilling and Eli Melaas