BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, JULY 14, 2009
ALL TIMES ARE IN EASTERN STANDARD TIME
 
OUR RECORD "80-LESS" SUMMER CONTINUES ON...
SUNSHINE AGAIN TODAY AND OUR JULY SUNSHINE
IS NOW INCREASING PAST THE LONG-TERM AVERAGE
 
No 80-degree temperatures have been recorded
since 1 June setting an all-time record through
at least 13 July for no 80-degree weather. The
all time July record for same would occur if
we do not have 80 degrees by 16 July, a record
which was set in July 1918. 
Sunshine for this month is approaching 60% of
possible and is now exceeding the average for
July of 57%. 
 
Today's observations:
 
7 A.M.  
Weather: Thin scattered cirrus, few altocumulus including
some lenticular distant NW and NE and ESE-SE, few dense
patches cirrus W-N, all cirrus W-N
mperature: 62F, Dew point: 50F, Wind: W at 9 kts
Sea-level pressure: 29.99 inches Hg, rising 
Visibility: 60 miles, 70 miles to the northwest
6-hour minimum temp: 56F
24-hour precipitation: 0.00 inch
BHO SA 1155 250 –SCT 60 156/62/50/2609/999/
FEW AC DSNT NW AND NE AND DSNT ESE-SE CI/PTCHS
DENS CI W-N VSBY NW 70/ 8/042 51016 10062 20056
 
10 A.M.  
Weather: Thin broken cirrus, cumulus forming distant
to the W thru N, few forming to the south 
Temperature: 69F, Dew point: 48F, Wind: WNW at 8 kts,
Wind: direction variable WSW to NW 
Sea-level pressure: 30.00 inches Hg, falling
Visibility: 75 miles
BHO SA 1455 250 –BKN 75 159/69/49/2908/000/ CU FRMG DSNT W-N FEW FRMG
VCNTY STN S FEW AC/ACSL DSNT W-NW WND 24V32/ 8/141 50003
 
1 P.M.  
Weather: Scattered cumulus, moderate cumulus, broken cirrus 
Temperature: 74F, Dew point: 48F, Wind: SW at 8 kts
Sea-level pressure: 29.98 inches hg, falling
Visibility: 75 miles 
6-hourly max. temp. 75F
BHO SA 1755 60 SCT 300 BKN 75 151/74/48/2308/998/
MDT CU CLR SKY DSNT NE-E WND 20V30/ 8/201 56008 10075 20062
 
WEATHER SUMMARY FOR MONDAY, JULY 13
 
TEMPERATURE (DEGREES F)
MAX.....76    NORMAL.....81
MIN.....55    NORMAL.....62
MEAN....66    NORMAL.....72
 
DEPARTURE FROM 30-YEAR NORMAL...........-6
TOTAL DEPARTURE FOR THE MONTH..........-78  [-6.2 DEGREES/DAY]
 
HEATING DEGREE DATA WILL RESUME IN SEPTEMBER
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............32 SW  AT  4:04 P.M.
                   AEROVANE..............28 SW  AT  4:04 P.M. 
                   ASOS..................30 SW  AT  4:05 P.M. 
                   DAVIS.................31 SW  AT  4:04 P.M.
FASTEST MILE FOR YESTERDAY...............22 SW  AT  2:12 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE............21 SW  AT  4:06 P.M. 
MAXIMUM 2-MINUTE DAVIS AVERAGE...........22 SW  AT  2:12 P.M.
AVERAGE WIND SPEED AND DIRECTION.......12.2 W 
                   ASOS................11.7
                   DAVIS...............11.6 WSW [250 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..........3.09  DEPARTURE....+1.51
                         ASOS..............3.15 
TOTAL PRECIPITATION FOR THE YEAR..........26.73  DEPARTURE....-0.52
                         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   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 our morning low temp: 56F; the normal low is now 62F 
 
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 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]
 
RECORDS FOR JULY 15
HIGH 94F IN 1995
LOW 50F IN 1929, 1930
PRECIP 1.64 INS IN 1896
WIND 71 MPH WNW IN 2002
 
TODAY'S REPORT PREPARED BY: Robert Skilling