BLUE HILL METEOROLOGICAL OBSERVATORY 
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, JULY 11, 2011  
ALL TIMES ARE IN EASTERN STANDARD TIME
 
WARM AND HUMID WEATHER RETURNS
AFTER BEAUTIFUL WARM AND DRY WEEKEND
MONTH OF JULY CONTINUES ON DRY SIDE
 
Temperatures continue warm today, the high has reached 89F by early
this afternoon. Humidity began increasing overnight increasing from the
50's to the 60's. The dew point has reached as high as 66-69F today with
winds blowing from the south to southwest. The month continues on the 
dry side and is now running more than a half inch below normal.
 
 
Today's observations:
 
7 A.M.  
Weather: Sky clear, few cirrus east and south thru southwest 
Temperature: 71F, Dew point: 66F; Wind: SSW at 8 kts
Sea-level pressure: 30.00 inches Hg, falling 
Visibility: 25 miles, hazy
6-hour min. temp: 65F
BHO SA 1155 CLR 25 158/71/66/2008/000/ FEW CI E AND S-SW HAZY/ 8/001
50002 10071 20065
 
10 A.M.
Weather: Sky clear, [SKC] 
Temperature: 83F, Dew Point: 69F;  Wind: SW at 6 kts
Sea-level pressure: 29.97 inches Hg, falling
Visibility: 20 miles, hazy, haze increasing
BHO SA 1455 CLR 20 148/83/68/2306/997/ SKC HAZY HZ INCR/
58010
 
1 P.M.
Weather: Scattered cumulus, few moderate cumulus, scattered cirrus,
cirrus W-N, partly thin 
Temperature: 88F, Dew Point: 66F;  Wind: S at 10G16 kts,
Wind: Direction variable SSE-SW
Sea-level pressure: 29.93 inches Hg, falling
Visibility: 25 miles, 20 miles, NE-SE, hazy 
6-hour max. temp: 89F
BHO SA 1755 55 SCT 250 SCT 25 134/88/66/1910G16/993/
FEW MDT CU CI W-N PTLY THN VSBY NE-SE 20 HAZY ALQDS WND 16V22/
8/201 56014 10089 20071
 
WEATHER SUMMARY FOR SUNDAY, JULY 10
 
TEMPERATURE (DEGREES F)
MAX.....83    NORMAL.....81
MIN.....59    NORMAL.....62
MEAN....71    NORMAL.....71
 
DEPARTURE FROM 30-YEAR NORMAL.....................0
TOTAL DEPARTURE FOR THE MONTH...................+28 [+2.6 DEGREES/DAY]
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............21 SSW AT  2:19 P.M.
                   AEROVANE...............27 SSW AT  2:20 P.M.
                   ASOS...................23 S   AT  2:20 P.M.
                   DAVIS..................23 SSW AT  2:19 P.M.
THE FASTEST MILE FOR YESTERDAY............13 SSW AT 10:15 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE.............16 SSW AT  2:21 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE............17 SSW AT  2:21 P.M.
AVERAGE WIND SPEED AND DIRECTION........8.1 SSW
                   ASOS.................7.9
                   DAVIS................8.1 WSW [245 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..........0.61  DEPARTURE.........-0.61
                         ASOS..............0.61
TOTAL PRECIPITATION FOR THE YEAR..........27.92  DEPARTURE.........+1.03
                        ASOS..............28.47**
**ASOS data is in error due to system failure on 1/12-13
 
PRELIMINARY CLIMATE SUMMARY FOR JULY 2011 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  78/59/69/-1/0.01/530/58         15 WNW
7/2  80/61/71/+1/0.00/603/66         17 SE
7/3  79/64/72/+2/0.02/018/02         22 S
7/4  86/68/76/+6/0.00/583/64         18 SW
7/5  89/66/78/+7/0.00/784/86         15 S
7/6  88/68/78/+7/T/792/87            30 WNW AERO 35 MPH WNW TSTM
7/7  86/67/77/+6/0.00/481/53         17 WNW
7/8  74/65/70/-1/0.47/.../..         16 ESE TSTM
7/9  81/63/72/+1/.../.../..          29 WNW
7/10 83/59/71/0/0.00/.../..          21 SSW
 
7/11 our morning low temp: 65F; the normal low is now 62F
 
DAILY RECORDS FOR JULY 2011
None so far...
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR JULY 11
HIGH 98F IN 1911
LOW 49F IN 1890
PRECIP 1.87 INS IN 1959
WIND 53 MPH NW IN 1988
 
RECORDS FOR JULY 12
HIGH 97F IN 1943
LOW 48F IN 1945
PRECIP 1.43 INS IN 1975
WIND 48e MPH SSW IN 1944
 
TODAY'S REPORT PREPARED BY: Robert Skilling/Erin Abbott