BLUE HILL METEOROLOGICAL OBSERVATORY 
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, SEPTEMBER 1, 2011  
ALL TIMES ARE IN EASTERN STANDARD TIME
 
AUGUST 2011 STATS
Temp. Deg. F
Av. Max. 79.3
Av. Min. 62.6
Mean     71.0 [+1.1]
24-hour corr mean: 70.2F 
Total heating degree day units:
Seasonal total started July 1:
Total cooling degree day units: 
Seasonal total started Jan. 1: 638 {132); 2010, 802 (+296)
High temp: 91F/1ST
Low  temp: 55F/23RD
Total precipitation: 8.36 ins. {+4.30]
Sunshine card minutes 14238/24780 = 58%
Sunshine astronomical 14788/25727 = 58%
(additional data available next several days)
 
 
WETTEST AUGUSTS (inches)
1) 18.78  1955
2) 11.44  1946
3) 10.72  1927
4)  8.92  1976
5)  8.68  2010
6)  8.58  1917
7)  8.36  2011 
8)  8.00  1924
9)  7.72  1975
10  7.48  1936
 
Today's observations: 

7 A.M.  
Weather: Scattered altocumulus, overcast dense cirrus
Temperature: 64F, Dew point: 56F; Wind: E at 6 kts
Sea-level pressure: 30.24 inches Hg, rising
Visibility: 15 miles, thin fog all quadrants,
inversion estimated top 4 hundred over city N,
thin smoke layer below inversion NNW-N  
6-hour min. temp: 62F
BHO SA 1155 180 SCT E200 OVC 15 241/64/56/0906/024/
AC CHAOTIC FEW ACSL LWR AC/ACSL SW-N DNS CI ALQDS
LGE BINOVC/CLR SKY BND XTDNG SW-N THN FG ALQDS
BLO INVSN ETMTD TOP 4 HND OVR CTY N THN K LYR BLO INVSN
NW-N VSBY E-SE 20/ 8/092 53005 10066 20062 
 
10 A.M.
Weather: Clear, cirrus/dense cirrus, few cirrocumulus and
cirrocumulus lenticularis NE-SSE receding layer,
few small cumulus forming distant SSW-W, few altocumulus and
altocumulus lenticularis distant SW-W
Temperature: 72F, Dew Point: 54F; Wind: N at 7 kts,
Wind: Gradually veering
Sea-level pressure: 30.26 inches Hg, rising
Visibility: 35 miles, WNW 45 miles, NE-E 25 miles,
distant haze 
BHO SA 1455 N/A 

1 P.M.
Weather: Scattered cirrus, thin scattered cirrus, cirrus
invading sky, few small cumulus SSE-SW-NW, few altocumulus
lenticularis W-NW
Temperature: 74F, Dew Point: 56F; Wind: NNE at 9 kts
Wind: Direction variable NNW-ENE  
Sea-level pressure: 30.22 inches Hg, falling
Visibility: 45 miles, distant haze
6-hour max. 76F 
BHO SA 1755 250 SCT 300 –SCT 45 233/74/56/0209/022/
FEW SML CU SSE-SW-NW FEW ACSL W-NW WND 34V05/ 8/146
56013 10076 20064
 
WEATHER SUMMARY FOR WEDNESDAY, AUGUST 31
 
TEMPERATURE (DEGREES F)
MAX.....80    NORMAL.....76
MIN.....61    NORMAL.....58
MEAN....71    NORMAL.....67
 
DEPARTURE FROM 30-YEAR NORMAL.....................+4
TOTAL DEPARTURE FOR THE MONTH....................+40 [+1.1 DEGREES/DAY]
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............16 ENE AT 12:23 P.M.  
                   AEROVANE...............20 ENE AT 12:23 P.M. 
                   ASOS...................16 ENE AT 12:24 P.M. 
                   DAVIS..................14 ENE 1-2      P.M.  
THE FASTEST MILE FOR YESTERDAY............12 W   AT  5:37 A.M.  
MAXIMUM 2-MINUTE ASOS AVERAGE.............12 ENE AT 12:28 P.M. 
MAXIMUM 2-MINUTE DAVIS AVERAGE............11 E   AT  6-7  P.M. 
AVERAGE WIND SPEED AND DIRECTION.........7.6 E                          
                   ASOS..................7.4
                   DAVIS.................7.3 S [185 deg]
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE.........-0.14
                         ASOS..............0.00  
TOTAL PRECIPITATION FOR AUGUST.............8.36  DEPARTURE.........+4.30
                         ASOS..............8.38
TOTAL PRECIPITATION FOR THE YEAR..........38.05  DEPARTURE.........+4.58
                        ASOS..............38.56**
**ASOS data is in error due to system failure on 1/12-13
 
PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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
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  91/69/80/+8/T/503/58       24 S
8/2  88/63/76/+4/0.15/657/76    27 NNE AERO 34 MPH TSTM
8/3  76/59/68/-4/0.00/673/78    18 ENE AERO 25 MPH
8/4  77/62/70/-2/0.00/783/91    20 NE  
8/5  78/61/70/-2/0.00/575/67    20 SE
8/6  85/66/76/+4/0.01/265/31    22 SSW AERO 28 MPH
8/7  73/67/70/-1/1.09/000/00    33 SSE AERO 39 MPH
8/8  80/70/75/+4/0.26/332/39    15 NNW
8/9  77/64/71/0/0.82/433/51     29 ESE AERO 36 MPH RMY 32 MPH TSTM **
8/10 79/61/70/-1/1.15/364/43    18 W   AERO 21 MPH RMY 18 MPH
8/11 79/61/70/-1/0.00/776/92    24 W   AERO 29 MPH RMY 27 MPH
8/12 81/58/70/-1/0.00/817/97    18 WNW AERO 25 MPH RMY 21 MPH
8/13 82/63/73/+2/0.00/512/61    15 SSW AERO 21 MPH RMY 19 MPH
8/14 74/65/70/0/0.04/000/00     21 S   AERO 28 MPH RMY 23 MPH
8/15 67/58/63/-7/1.89/000/00    40 NNE AERO 43 NNE RMY 41 MPH
8/16 69/58/61/-6/T/0.09/058/07  21 WNW AERO 24 MPH RMY 19 MPH
8/17 83/61/72/+2/0.00/813/98    20 W   AERO 24 MPH RMY 21 MPH
8/18 85/64/75/+5/0.00/695/84    24 SSW AERO 30 MPH RMY 26 MPH
8/19 85/67/76/+6/T/371/45       31 W   AERO 37 MPH RMY 31 MPH TSTM 
8/20 83/67/75/+6/0.01/411/50    20 SSE AERO 25 MPH RMY 22 MPH
8/21 82/66/74/+5/0.04/311/38    35 S   AERO 42 MPH RMY 36 MPH
8/22 75/60/68/-1/0.67/661/81    33 W   AERO 40 MPH RMY 37 MPH
8/23 77/55/66/-3/0.00/724/89    20 WSW AERO 24 MPH RMY 21 MPH  
8/24 78/61/70/+1/0.00/681/84    33 S   AERO 40 MPH RMY 36 MPH
8/25 83/65/74/+6/0.05/388/48    36 SSW AERO 44 MPH RMY 39 MPH
8/26 84/66/75/+7/0.11/758/94    26 WSW AERO 32 MPH RMY N/A
8/27 79/67/73/+5/0.63/040/05    23 E   AERO 28 MPH RMY N/A
8/28 72/62/67/-1/1.35/000/00    77 SE  AERO 89 MPH RMY 82 MPH "IRENE"
8/29 77/56/67/0/0.00/790/99     43 SW  AERO 48 MPH RMY N/A
8/30 78/57/68/+1/0.00/763/96    16 SW  AERO 21 MPH RMY 18 MPH  
8/31 80/61/71/+4/0.00/634/80    16 ENE AERO 20 MPH RMY 14 MPH 
 
9/1 our morning low temp: 62F; the normal low is now 58F
 
DAILY RECORDS FOR AUGUST 2011
None 
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR SEPTEMBER 1
HIGH 93F IN 1969, 2010
LOW 47F IN 1975
PRECIP 1.60 INCHES IN 1927
PEAK GUST 59e MPH S IN 1945, SSW IN 1965
 
RECORDS FOR SEPTEMBER 2
HIGH 99F IN 1953 (SEPTEMBER MAXIMUM RECORD)
LOW 44F IN 1909
PRECIP 2.73 INCHES IN 1947
PEAK GUST 55e MPH WNW IN 1944
 
TODAY'S REPORT PREPARED BY: Robert Skilling