BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JULY 12, 2009
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.  
Weather: Overcast with fog
Temperature: 65F, Dew point: 64F, Wind: SSW at 17G23 kt
Sea-level pressure: 29.91 inches Hg, rising 
Visibility: 6 miles
6-hour minimum temp: 61F
24-hour precipitation: 0.62 inches
BHO SA 1155 E10 OVC 6F 128/65/64/2017G23/991/
FEW BINOVC ALQDS/ 8/7// 53002 6//// 70062 10065 20061
 
10 A.M.  
Weather: Overcast
Temperature: 70F, Dew point: 63F, Wind: SSW at 10 kt
Sea-level pressure: 29.92 inches Hg, rising
Visibility: 25 miles
BHO SA 1455 20 OVC 25 131/70/63/2110/992/
FEW BINOVC ALQDS/ 8/5// 50003
 
1 P.M.  
Weather: Scattered cumulus
Temperature: 75F, Dew point: 59F, Wind: WSW at 14 kt
Sea-level pressure: 29.86 inches hg, falling
Visibility: 80 miles
6-hourly max. temp. 77F
BHO SA 1755 35 SCT 80 113/75/59/2414/986/
CLR DSNT W/ 8/400 58018 10077 20065
 
 
WEATHER SUMMARY FOR SATURDAY, JULY 11
 
TEMPERATURE (DEGREES F)
MAX.....77    NORMAL.....81
MIN.....56    NORMAL.....62
MEAN....67    NORMAL.....72
 
DEPARTURE FROM 30-YEAR NORMAL...........-5
TOTAL DEPARTURE FOR THE MONTH..........-69  [-6.5 DEGREES/DAY]
 
HEATING DEGREE DATA WILL RESUME IN SEPTEMBER
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............36 S   AT 11:45 P.M.
                   AEROVANE..............32 S   AT 11:45 P.M.
                   ASOS..................35 S   AT 11:46 P.M.
                   DAVIS.................34 SSW AT  2:44 P.M.
FASTEST MILE FOR YESTERDAY...............31 S   AT 11:08 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE............25 SSW AT 11:10 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE...........25 S   AT  2:50 P.M.
AVERAGE WIND SPEED AND DIRECTION.......14.5 SSE
                   ASOS................14.3
                   DAVIS...............13.0 S [191 DEG]
* last of several occurrences
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.62  DEPARTURE....+0.50
                         ASOS..............0.64
TOTAL PRECIPITATION FOR THE MONTH..........3.09  DEPARTURE....+1.75
                         ASOS..............3.15 
TOTAL PRECIPITATION FOR THE YEAR..........26.73  DEPARTURE....-0.28
                         ASOS.............27.80
 
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   AERO 25 MPH 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/.../..    27 NNE   TSTM
7/9  66/55/61/-10/0/.../..      23 NE
7/10 76/54/65/-6/0/.../..       21 SW
7/11 77/56/67/-5/.../.../..     36 S
 
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 13
HIGH 95F IN 1894
LOW 52F IN 1888, 1895, 1939, 1973
PRECIP 3.54 INS IN 1996
WIND 55 MPH SE IN 1996
 
RECORDS FOR JULY 14
HIGH 98F IN 1952
LOW 51F IN 1895, 1937
PRECIP 1.97 INS IN 1960
WIND 110e MPH NW IN 1942 [RECORD FOR MONTH]
 
TODAY'S REPORT PREPARED BY: Andrew Hoell