BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, OCTOBER 5, 2009 
ALL TIMES ARE IN EASTERN STANDARD TIME
 
SATURDAY RAINSTORM BROUGHT JUST OVER AN INCH
A PARTLY TO MOSTLY SUNNY PLEASANT EARLY
OCTOBER DAY TODAY WITH MILD TEMPERATURES 
 
The all-day rainstorm on Saturday left just
over one inch of rain before ending early
in the evening.  Sunday, early morning fog and
low clouds cleared away leaving us with a
mostly sunny mid to late afternoon. 
Today developing cumulus clouds have partly
covered the sky by afternoon along with
increasingly gusty west winds which have
reached 25 to 30 MPH in gusts. The high  
high temperature has reached 63F.
 
Today's observations:
 
7 A.M.  
Weather: Scattered stratocumulus, scattered altocumulus,
including few lenticularis and thin scattered cirrus with
a few cirrocumulus  
Temperature: 53F, Dew point: 49F, Wind: W at 12 kts
Sea-level pressure: 29.83 inches Hg, rising
Visibility: 40 miles, light distant haze 
6-hour minimum temp: 52F
24-hour precipitation: 0.00 inches
BHO SA 65 SCT 85 100 SCT 250 –SCT 40 103/53/49/2812/983/
SC LYR 65 HND NE-S RCDNG E SKY CLRG PST HR
FEW ACSL FEW CC LGT DSNT HZ/ 8/541 52005 10056 20052
 
10 A.M.
Weather: Clear, cumulus fractus, cumulus and cumulus
with moderate tops forming S-W-N, few altocumulus,
and altocumulus lenticularis distant NNW and few
cirrus distant north 
Temperature: 60F, Dew point: 47F, Wind: W at 13G20 kts,
Wind: direction variable WSW-NW 
Sea-level pressure: 29.83 inches Hg, falling
Visibility: 50 miles, light distant haze 
BHO SA 1455 CLR 50 104/60/47/2713G20/983/ CUFRA/CU FRMG S-W-N 
MDT TOPS W-NW FEW AC/ACSL DSNT NNW AND FEW CI DSNT N
WND 25V31/ 8/241 50001
 
1 P.M.   
Weather: Scattered cumulus, moderate cumulus and a few
cumulus congestus, scattered stratocumulus formed by
the spreading out of cumulus  
Temperature: 63F, Dew point: 46F, Wind: W at 13 kts,
Wind: wind gust to 22 kts past hour
Sea-level pressure: 29.80 inches Hg, falling
Visibility: 60 miles 
6-hour maximum temp: 63F
BHO SA 1755 44 SCT 55 SCT 60 093/63/46/2713/980/ MDT CU ALQDS 
WND GST 22 KTS PST HR/ 8/400 58011 10063 20053

 
WEATHER SUMMARY FOR SUNDAY, OCTOBER 4
 
TEMPERATURE (DEGREES F)
MAX.....67    NORMAL.....65
MIN.....57    NORMAL.....47
MEAN....62    NORMAL.....56
 
DEPARTURE FROM 30-YEAR AVERAGE...........+6
TOTAL DEPARTURE FOR THE MONTH............-8 [-2.2 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............3  DEPARTURE.......-7
TOTAL HEATING UNITS FOR THE MONTH............43  DEPARTURE.......+6
TOTAL HEATING UNITS FOR THE SEASON..........200  DEPARTURE.......-6
TOTAL HEATING UNITS LAST SEASON TO DATE.....154  DIFFERENCE.....+46
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............21 WSW AT 7:33 P.M.
                   AEROVANE..............18 WSW AT 7:33 P.M.
                   ASOS..................17 WSW AT 7:35 P.M.  
                   DAVIS.................18 WSW AT 7:33 P.M.   
FASTEST MILE FOR YESTERDAY...............12 WSW AT 7:34 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE............13 W   AT 7:34 P.M.      
MAXIMUM 2-MINUTE DAVIS AVERAGE...........13 WSW AT 7:34 P.M.       
AVERAGE WIND SPEED AND DIRECTION....... 6.4 W        
                   ASOS.................6.2
                   DAVIS................6.5 W [280 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 MONTH..............1.10   DEPARTURE....+0.54                        
TOTAL ASOS PRECIPITATION FOR MONTH.........1.10
TOTAL PRECIPITATION FOR THE YEAR..........38.98   DEPARTURE....+0.82
                         ASOS.............40.16
 
PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 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
 
10/1 56/39/48/-9/0/.../..     27 WSW  AERO 23 MPH WSW
10/2 60/40/50/-6/0/.../..     23 SSE 
10/3 63/51/57/+1/1.10/000/00  32 ESE
10/4 67/57/62/+6/0/.../..     21 WSW
 
10/5 our morning low temp: 52F; the normal low is now 46F
 
NEW DAILY RECORDS FOR OCTOBER 2009
None.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR OCTOBER 5
HIGH 86F IN 2007
LOW 29F IN 1965
PRECIP 3.17 INCHES IN 1962
PEAK GUST 64e MPH S IN 1979
 
RECORDS FOR OCTOBER 6
HIGH 83F IN 1990,2007
LOW 26F IN 1965
PRECIP 3.78 INCHES IN 1962
PEAK GUST 60e MPH S IN 1942
 
TODAY'S REPORT PREPARED BY: Robert Skilling