BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, SEPTEMBER 6, 2009
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.  
Weather: Few cumulus humilis, few cirrus spissatus
Temperature: 58F, Dew point: 48F, Wind: NNE at 16G23 kt
Sea-level pressure: 30.38 inches Hg, rising
Visibility: 80 miles
6-hour minimum temp: 55F
BHO SA 1155 CLR 80 287/58/48/0216G23/038/
FEW CU ALQDS FEW CI S PK WND 0228/1102/
8/103 53025 10061 20055
 
10 A.M.
Weather: Scattered cumulus mediocris,
scattered cirrus fibratus
Temperature: 61F, Dew point: 48F, Wind: NE at 13G22 kt
Sea-level pressure: 30.45 inches Hg, rising
Visibility: 90 miles
BHO SA 1455 30 SCT 250 SCT 90 312/61/48/0316G22/045/ 8/201 53014
 
1 P.M.
Weather: Scattered cumulus humilis,
scattered cirrus fibratus
Temperature: 63F, Dew point: 42F, Wind: NE at 15G20 kt
Sea-level pressure: 30.46 inches Hg, rising
Visibility: 90 miles
6-hour max. temp: 64F
BHO SA 1755 30 SCT 250 SCT 90 315/63/42/0415G20/046/
8/101 50003 10064 20058
 
WEATHER SUMMARY FOR SATURDAY, SEPTEMBER 5
 
TEMPERATURE (DEGREES F)
MAX.....81    NORMAL.....74
MIN.....59    NORMAL.....57
MEAN....70    NORMAL.....65
 
DEPARTURE FROM 30-YEAR AVERAGE...........+5
TOTAL DEPARTURE FOR THE MONTH............+2 [+0.2 DEGREES/DAY]
 
HEATING DEGREE DATA WILL RESUME IN SEPTEMBER
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............25 NNW AT 11:55 P.M.
                   AEROVANE..............22 NNW AT 11:53 P.M.
                   ASOS..................22 NNE AT 11:54 P.M.
                   DAVIS................ 20 WNW AT  3:42 A.M.
FASTEST MILE FOR YESTERDAY...............16 NNW AT 11:56 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE............15 NNE AT 11:50 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE...........15 WNW AT  3:27 A.M.
AVERAGE WIND SPEED AND DIRECTION........6.8 NW
                   ASOS.................6.3
                   DAVIS................6.3 NNW [331 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 MONTH..............0.00   DEPARTURE....-0.65
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE YEAR..........34.77   DEPARTURE....+0.65
                         ASOS.............35.92
 
PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER 2009 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
 
9/1  71/51/61/-6/0/.../..     17 NW
9/2  76/54/65/-1/0/.../..     22 S
9/3  77/56/67/+1/0/.../..     19 SW
9/4  77/60/69/+3/0/.../..     18 NE
9/5  81/59/70/+5/0/.../..     25 NNW
 
NEW DAILY RECORDS FOR SEPTEMBER 2009 TO DATE...
None.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR SEPTEMBER 6
HIGH 92F IN 1900
LOW 39F IN 1888
PRECIP 3.19 INCHES IN 1890
PEAK GUST 78e MPH SE IN 1979 (TROPICAL STORM DAVID)
 
RECORDS FOR SEPTEMBER 7
HIGH 92F IN 2007
LOW 40F IN 1888
PRECIP 2.95 INCHES IN 1891
PEAK GUST 58e MPH W IN 1941
 
TODAY'S REPORT PREPARED BY: Andrew Hoell