BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, JULY 12, 2012 
ALL TIMES ARE IN EASTERN STANDARD TIME
 
TEMPERATURES HEATING UP THROUGH THE 80'S
THE AIR MASS CONTINUES DRY WITH DEW POINTS IN 50'S
SUNSHINE CONTINUES TO PREVAIL FOR A VERY SUNNY JULY
 
TEMPERATURES ON THE RISE AGAIN
 
Temperatures are rising into the upper 80's today but while
things are heating up the air mass continue very dry with
dew points in the 50's as has been the case during the
past several warm days.  
Our high reading today through 2 P.M. EDT 
was 88 degrees.
 
VERY SUNNY AND VERY DRY JULY TO DATE
 
July has not only been a very dry month to date but also
a very sunny one. Through 11 days the 75% of possible
bright sunshine is far above the average for the month
which is 57%.  The record sunniest July was back in 1952
when this month had 75% of the possible bright sunshine. 
That month was also the driest July on record with just
0.13 inch of rainfall.
 
WINDS SPEEDS CONTINUE TO BE WAY DOWN THIS MONTH
 
The average uncorrected wind speed is down to 8.8 MPH
for the month continuing a decreasing wind average
which has prevailed most of this year.
 
Today's observations:
 
7 A.M.
Weather: Scattered dense cirrus and scattered cirrus
Temperature: 70F; Dew Point 62F; Wind: W at 6 kts
Sea-level pressure: 30.20 ins., Hg, rising then falling slightly  
Visibility: 30 miles, except 50 miles WNW
6-hour min. temp: 64F
BHO SA 1155 220 SCT 250 SCT 30 227/70/62/2706/020/ CI/DNS CI LYR
ENE-SSW FG LYR ALG HRZN DSNT SSE-S VSBY SSE-S 20 THN F
VSBY WNW 50 LGT DSNT HZ/ 8/002 50005 10070 20064
 
10 A.M.
Weather: Scattered dense cirrus, cirrus E-SSW, cumulus,
few moderate cumulus forming distant WNW-NW, few cumulus fractus
forming over city north
Temperature: 82F; Dew Point: 58F; Wind: SE at 5 kts
Wind: Light and variable
Sea-level pressure: 30.19 ins. Hg, falling then falling more rapidly 
Visibility: 35 miles, except 40 miles WNW, hazy
BHO SA 1455 220 SCT 35 223/82/58/1305/019/ FEW CU FRMG DSNT
WNW-NW FEW CUFRA/CU FRMG OVR CTY N CI/DNS CI DSNT E-SSW
VSBY WNW 40 HAZY ALQDS/ 8/202 58004
 
1 P.M.
Weather: Scattered cumulus and moderate cumulus except NNE-E,
dense cirrus layer E-SSW
Temperature: 87F; Dew Point 56F; Wind: SSE AT 6 kts
Wind: Light and variable
Sea-level pressure: 30.16 ins. Hg, falling then more rapidly
Visibility: 35 miles, hazy, distant haze increasing 
6-hour max temp: 88F 
BHO SA 1755 65 SCT 220 SCT 35 213/87/56/1606/016/ CU/FEW MDT CU
SSE-W-N DNS CI LYR E-SSW MSTLY CLR SKY DSNT NNE-ENE DSNT HZ INCR/
58010 10088 20070
 
 
WEATHER SUMMARY FOR WEDNESDAY, JULY 11
 
TEMPERATURE (DEGREES F)
MAX.....84    NORMAL.....81
MIN.....64    NORMAL.....63
MEAN....74    NORMAL.....72
 
DEPARTURE FROM 30-YEAR NORMAL........................+2
TOTAL DEPARTURE FOR THE MONTH......................+40 [+3.4 DEGREES/DAY]
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............21 S  AT  7:47 P.M.
                   AERO..................21 S  AT  8:39 P.M.
                   ASOS..................21 S   AT  8:40 P.M.
                   DAVIS.................21 S   AT  7:46 P.M. RMY 23
THE FASTEST MILE FOR YESTERDAY...........15 S   AT  7:43 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE............15 SSW AT  9:14 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE...........15 SSW AT  9:14 P.M.
AVERAGE WIND SPEED AND DIRECTION........8.3 SSW
                   ASOS.................8.4
                   DAVIS................7.6 S [186 deg]
 
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..........0.38   DEPARTURE...........-0.87
                         ASOS..............0.36
TOTAL PRECIPITATION FOR THE YEAR..........18.07   DEPARTURE..........-10.15
                         ASOS.............17.98
 
PRELIMINARY CLIMATE SUMMARY FOR JULY 2012 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
RMY:  RMY = R.M. Young wind gust recording system added 8/9/2011
TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
 
7/1  89/67/78/+8/0.01/676/74        33 WSW AERO 32 MPH WSW RMY 34
7/2  84/66/75/+5/T/644/71           23 W   AERO 22 MPH W   RMY 23
7/3  85/63/74/+3/0.00/787/86        23 W   AERO 21 MPH W   RMY 20
7/4  85/66/76/+5/0.37/480/53        20 W   AERO 20 MPH W   RMY 23
7/5  81/68/75/+4/0.00/729/80        23 NW  AERO 23 MPH NW  RMY 22
7/6  86/64/75/+4/0.00/753/83        18 SSW AERO 18 MPH SSW RMY 19
7/7  81/69/75/+4/T/224/25           23 W   AERO 23 MPH W   RMY 24
7/8  87/66/77/+5/0.00/814/90        23 W   AERO 23 MPH W   RMY 25
7/9  82/61/72/0/0.00/738/85         22 W   AERO 21 MPH W   RMY 23
7/10 83/61/72/0/0.000/852/98        18 W   AERO 18 MPH W   RMY 18
7/11 84/64/74/+2/0.000/768/88       21 S   AERO 21 MPH S   RMY 23
 
7/12 morning low temp: 64F; the normal low is now 63F
 
DAILY RECORDS FOR JULY 2012
None so far.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR JULY 12
HIGH 97F IN 1943
LOW 48F IN 1945
PRECIP 1.43 INS IN 1975
WIND 48e MPH SSW IN 1944
 
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
 
TODAY'S REPORT PREPARED BY: Robert Skilling, Jonathan O'Brien,
William Wilson, Joey McNamara