BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JULY 19, 2009
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.  
Weather: Clear with a few cirrus clouds
Temperature: 67F, Dew point: 57F, Wind: W at 13 kt
Sea-level pressure: 30.02 inches Hg, rising
Visibility: 70 miles
6-hour minimum temp: 62F
BHO SA 1155 CLR 70 165/67/57/2613/002/
FEW CI DSNT NE-SE AND SW/ 8/001 53022 10067 20062
 
10 A.M.  
Weather: Clear with stratocumulus forming
and a few cirrus
Temperature: 74F, Dew point: 56F, Wind: WSW at 14G19 kt 
Sea-level pressure: 30.04 inches Hg, rising
Visibility: 70 miles
BHO SA 1455 CLR 70 174/74/56/2414G19/004/
FEW SC FRMG ALQDS FEW CI NE-SE/ 8/401 51009
 
1 P.M.  
Weather: Scattered stratocumulus; scattered cirrus
Temperature: 75F, Dew point: 54F, Wind: WSW at 14 kt
Sea-level pressure: 30.05 inches Hg, steady
Visibility: 70 miles
6-hourly max. temp. F
BHO SA 1755 50 SCT 200 SCT 70 175/75/54/2514/005/
8/401 50001 10079 20067
 
WEATHER SUMMARY FOR SATURDAY, JULY 18
 
TEMPERATURE (DEGREES F)
MAX.....84    NORMAL.....82
MIN.....66    NORMAL.....62
MEAN....75    NORMAL.....72
 
DEPARTURE FROM 30-YEAR AVERAGE..........+3
TOTAL DEPARTURE FOR THE MONTH..........-84  [-5.0 DEGREES/DAY]
 
HEATING DEGREE DATA WILL RESUME IN SEPTEMBER
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............25 SSW AT 6:18 P.M.
                   AEROVANE..............23 SSW AT 6:18 P.M.  
                   ASOS..................25 SW  AT 6:15 P.M.  
                   DAVIS.................26 SSW AT 6:18 P.M. 
FASTEST MILE FOR YESTERDAY...............21 SSW AT 6:23 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE............18 SW  AT 6:24 P.M.  
MAXIMUM 2-MINUTE DAVIS AVERAGE...........20 SSW AT 6:13 P.M. 
AVERAGE WIND SPEED AND DIRECTION........9.8 SSW
                   ASOS.................9.5
                   DAVIS................9.6 SSW [196 DEG]
 
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..........3.45  DEPARTURE....+1.27
                         ASOS..............3.52 
TOTAL PRECIPITATION FOR THE YEAR..........27.09  DEPARTURE....-0.76
                         ASOS.............28.17
 
PRELIMINARY CLIMATE SUMMARY FOR JULY 2009 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane wind recording system gust when significant
TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
 
7/1  62/57/60/-10/0.51/000/00   25 NNE   TSTM
7/2  66/56/61/-9/1.00/000/00    29 SSW   TSTM
7/3  75/58/67/-3/T/283/31       23 WSW
7/4  77/59/68/-2/0/838/92       43 W      
7/5  78/54/66/-5/0/856/94       33 W     
7/6  79/60/70/-1/0/883/97       20 SSE
7/7  66/58/62/-9/0.73/027/03    28 SE    TSTM
7/8  67/56/62/-9/0.23/091/10    27 NNE   TSTM
7/9  66/55/61/-10/0/689/76      23 NE
7/10 76/54/65/-6/0/896/99       21 SW
7/11 77/56/67/-5/0.29/686/76    36 S
7/12 78/60/69/-3/0.33/650/72    30 SSW   TSTM
7/13 76/55/66/-6/0/802/89       32 SW 
7/14 75/56/66/-6/0/567/63       25 WNW
7/15 79/55/67/-5/0/826/92       30 WSW
7/16 77/62/70/-2/T/161/18       30 S
7/17 86/65/76/+4/.../.../..     24 ESE
7/18 84/66/75/+3/.../.../..     25 SSW   TSTM
 
NEW DAILY RECORDS FOR JULY 2009 TO DATE...
NONE
 
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: Andrew Hoell