BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, AUGUST 19, 2012 
ALL TIMES ARE IN EASTERN STANDARD TIME
 
FIRST COOLER THAN AVERAGE DAY SINCE JULY 31ST
0.19 INCH OF RAINFALL MEASURED ON SUMMIT FOLLOWING YESTERDAY'S SHOWERS
 
Yesterday marked the first day since July 31st where the average temperature
finished below normal. This morning's low of 56F is the coolest temperature
since June 27th. Showers that passed through the area yesterday left 0.19 inch
of rainfall here on the summit.
 
Today has been cooler, with mostly cloudy skies. Visibility is very good today,
with Grand Monadnock in sight off to our northwest. Winds have been extremely
calm today, with an average speed of only 4.1 mph thus far.
 
 
Today's observations:
 
7 A.M.
Weather: Scattered stratocumulus, scattered thin cirrus, few stratus fractus
all quadrants
Temperature: 60F; Dew Point: 56F; Wind: N at 9 kts
Sea-level pressure: 29.97 ins. Hg, increasing    
Visibility: 45 miles, WSW-NW 70 miles
6-hour min. temp: 56F
24-hour precip: 0.19 inch
BHO SA 1155 15 SCT 250 –SCT 45 148/60/56/3509/997/ FEW STFRA ALQDS VSBY HIER
WSW-NW 70/ 8/601 52017 MANUAL 70019 ASOS 70017 10061 20056
  
10 A.M.
Weather: Broken cumulus, broken cirrus, few moderate cumulus all quadrants,
light distant haze
Temperature: 69F; Dew Point: 60F; Wind: E at 7 kts,
Wind: Direction variable NNE-E
Sea-level pressure: 29.98 ins. Hg, increasing
Visibility: 50 miles, W-NW 65 miles, S 40 miles, light distant haze        
BHO SA 1455 E20 BKN 250 BKN 50 152/69/60/0707/998/ FEW MDT CU ALQDS LGT DSNT HZ
VSBY HIER W-NW 65 VSBY LWR S 40 WND 02V10/ 8/201 53004
 
 
WEATHER SUMMARY FOR SATURDAY, AUGUST 18
 
TEMPERATURE (DEGREES F)
MAX.....69    NORMAL.....79
MIN.....62    NORMAL.....62
MEAN....66    NORMAL.....71
 
DEPARTURE FROM 30-YEAR NORMAL.....................-5
TOTAL DEPARTURE FOR THE MONTH....................+77 [+4.1 DEGREES/DAY]
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............18 WNW AT 4:17 A.M.
                   AERO..................17 WNW AT 4:18 A.M.
                   ASOS..................17 WNW AT 4:17 A.M.
                   DAVIS.................17 W   AT 4:16 A.M. RMY 16
THE FASTEST MILE FOR YESTERDAY...........12 WNW AT 4:23 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE............13 WNW AT 4:18 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE...........11 NW  AT 5:34 A.M.
AVERAGE WIND SPEED AND DIRECTION........5.6 WNW
                   ASOS.................5.8
                   DAVIS................5.3 W [264 deg]
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.19   DEPARTURE...........+0.06
                         ASOS..............0.20
TOTAL PRECIPITATION FOR THE MONTH..........2.73   DEPARTURE...........+0.24
                         ASOS..............2.72
TOTAL PRECIPITATION FOR THE YEAR..........24.34   DEPARTURE...........-9.14
                         ASOS.............24.27
 
PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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
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
 
8/1  82/66/74/+2/0.58/390/45        33 W   AERO 33 MPH W   RMY 35
8/2  87/67/77/+5/T/648/75           20 W   AERO 20 MPH W   RMY 20
8/3  90/70/80/+8/0.00/707/82        23 SW  AERO 23 MPH SW  RMY 23
8/4  91/72/82/+10/0.00/713/83       22 S   AERP 21 MPH S   RMY 23
8/5  87/72/80/+8/0.14/660/77        37 S   AERO 37 MPH SSW RMY 37
8/6  82/67/75/+3/0.00/710/83        25 WNW AERO 27 MPH WNW RMY 26
8/7  84/65/75/+3/0.00/725/85        23 S   AERO 21 MPH S   RMY 23
8/8  87/68/78/+6/0.00/578/68        20 S   AERO 18 MPH S   RMY 18
8/9  89/68/79/+7/0.00/630/77        25 S   AERO 23 MPH S   RMY 25
8/10 84/70/77/+6/0.87/228/27        32 SE  AERO 32 MPH SE  RMY 32 TSTM
8/11 84/69/77/+6/0.00/464/55        25 S   AERO 27 MPH S   RMY 27
8/12 83/70/77/+6/0.03/420/50        24 S   AERO 23 MPH S   RMY 23
8/13 84/66/75/+4/0.00/787/94        21 WNW AERO 20 MPH WNW RMY 19
8/14 81/64/73/+2/0.00/451/54        18 W   AERO 18 MPH SW  RMY 19
8/15 83/63/73/+2/0.89/358/43        33 W   AERO 33 MPH W   RMY 32 TSTM
8/16 82/64/73/+2/T/.../..           23 WNW AERO 22 MPH WNW RMY 21
8/17 84/65/75/+4/T/.../..           26 S   AERO 26 MPH SSW RMY 27
8/18 69/62/66/-5/0.19/.../..        18 WNW AERO 17 MPH WNW RMY 16
 
8/19 the morning low temp: 56F; the normal low is now 62F
 
DAILY RECORDS FOR AUGUST 2012
8/4 - DAILY RECORD HIGH MINIMUM TEMP OF 72F;
      ties the current record of 72F in 1974.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR AUGUST 19
HIGH 90F IN 1906, 1966, 2002
LOW 48F IN 1958
PRECIP 7.02 INCHES IN 1955 [DIANE - RECORD FOR MONTH]
PEAK GUST 78 MPH ENE IN 1991 – HURRICANE BOB
 
RECORDS FOR AUGUST 20
HIGH 93F IN 1937
LOW 48F IN 1896, 1905, 1949
PRECIP 2.71 INCHES IN 1970
PEAK GUST 47 MPH W IN 1983
 
TODAY'S REPORT PREPARED BY: George Tabeek and Jeb Postle
 
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