BLUE HILL OBSERVATORY MILTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, AUGUST 29, 2010 
ALL TIMES ARE IN EASTERN STANDARD TIME
 
TEMPERATURES SOARING AS HIGH PRESSURE KICKS IN...TROPICAL
STORM EARL ON ITS WAY
 
Conditions were once again sunny and beautiful
on Sunday as a ridge of high pressure locked into
the area. After an overnight low of 61F, temperatures
soared into the upper 70s by 9:30 AM EDT this morning
and are expected to reach 90F by later this afternoon.
Winds are averaging about 10 MPH from the WNW.
 
Meanwhile, as Hurricane Danielle passes by well to our
east, a close watch should now be kept on the next potential
tropical threat: Tropical Storm Earl. As of 8:00 AM EDT
this morning, forecasts suggest Earl will reach New England
latitudes by this Friday or Saturday as possibly a Category
3 hurricane.
 
Today's observations: 
 
7 A.M.
Weather: Clear, few thin cirrus E-SE
Temperature: 68F, Dew point: 58F; Wind: W at 9 kts
Sea-level pressure: 30.16 inches Hg, rising
Visibility: 35 miles
6-hour minimum temp: 61F
BHO SA 1155 CLR 35 212/68/58/2609/016/ FEW THN CI E-SE/
8/001 53010 10068 20061
 

WEATHER SUMMARY FOR SATURDAY, AUGUST 28
 
TEMPERATURE (DEGREES F)
MAX.....80     NORMAL.....76
MIN.....56     NORMAL.....59
MEAN....68     NORMAL.....68                                                                         
 
DEPARTURE FROM 30-YEAR AVERAGE..................0
TOTAL DEPARTURE FOR THE MONTH.................+38 [+1.2 DEGREES/DAY]
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............20 SSW AT 10:00 P.M. *
                   AEROVANE..............21 SSW AT  9:57 P.M.
                   ASOS..................20 SSW AT 10:00 P.M.
                   DAVIS.................20 SW  AT  9:36 P.M. 
THE FASTEST MILE FOR YESTERDAY...........16 SSW AT  9:57 P.M. *
MAXIMUM 2-MINUTE ASOS AVERAGE............16 SSW AT  9:57 P.M. 
MAXIMUM 2-MINUTE DAVIS AVERAGE...........17 SW  AT  9:36 P.M.  
AVERAGE WIND SPEED AND DIRECTION.......9.2 WNW 
                   ASOS................8.7
                   DAVIS...............8.6 W [271 DEG]
* = last of several occurrences
 
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 THE MONTH..........8.68  DEPARTURE........+5.04
                         ASOS..............8.80
TOTAL PRECIPITATION FOR THE YEAR..........46.03  DEPARTURE.......+12.98
                         ASOS.............45.84 **
** ASOS missing rainfall due to system failure on 6/24-25
 
PRELIMINARY CLIMATE SUMMARY FOR AUGUST 2010 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
 
8/1  79/59/69/-3/0.00/512/59   22 SE
8/2  82/61/72/0/0.00/614/71    24 S
8/3  83/64/74/+2/0.00/397/46   32 SSW AERO 36 MPH SSW
8/4  89/71/80/+8/0.00/421/49   27 SSW
8/5  89/71/80/+8/0.86/103/12   30 W   AERO 35 MPH W    TSTM
8/6  85/62/74/+2/0.00/693/81   33 W   AERO 36 MPH W
8/7  79/58/69/-2/0.00/768/90   28 SSW
8/8  84/63/74/+3/0.00/664/78   30 S
8/9  91/69/80/+9/T/637/75      25 WSW
8/10 87/69/78/+7/0.17/660/78   18 WSW
8/11 80/66/73/+2/0.00/819/97   22 NNE
8/12 80/65/73/+2/T/362/43      21 E
8/13 77/61/69/-2/0.00/780/93   22 ENE
8/14 81/58/70/0/0.00/787/94    22 SSE
8/15 78/59/69/-1/0.00/309/37   24 SSE
8/16 78/63/71/+1/0.17/.../..   33 S   AERO 36 MPH S
8/17 90/70/80/+10/T/.../..     25 WSW AERO 27 MPH WSW
8/18 83/66/75/+5/0.00/.../..   16 SSW
8/19 88/64/76/+6/0.01/.../..   22 SW
8/20 86/63/75/+6/0.00/.../..   23 W
8/21 81/58/70/+1/0.00/.../..   18 S
8/22 68/62/65/-4/0.29/000/00   35 NE
8/23 63/58/61/-8/2.09/000/00   43 NNE AERO 47 MPH NNE
8/24 61/59/60/-9/2.40/000/00   36 NE  AERO 39 MPH NE 
8/25 64/60/62/-6/2.69/000/00   38 N   AERO 44 MPH N
8/26 81/61/71/+3/0.00/.../..   27 W
8/27 77/55/66/-2/0.00/.../..   20 W
8/28 80/56/68/0/0.00/.../..    18 SSW
 
8/29 our morning low temp: 61F; the normal low is 59F  
 
NEW DAILY RECORDS FOR AUGUST 2010
8/23 - new record daily rainfall of 2.09 ins;
surpasses 1.37 ins. in 1955
8/24 - new record daily rainfall of 2.40 ins;
surpasses 1.92 ins. in 1897
8/25 - new record daily rainfall of 2.69 ins;
surpasses 1.72 ins. in 1958
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR AUGUST 29
HIGH 95F IN 1953
LOW 41F IN 1982
PRECIP 2.88 INCHES IN 1962
PEAK GUST 70e MPH S IN 1949
 
RECORDS FOR AUGUST 30
HIGH 94F IN 1953
LOW 39F IN 1965
PRECIP 2.75 INCHES IN 1936
PEAK GUST 43 MPH NW IN 1965
 

TODAY'S REPORT PREPARED BY: Eli Melaas