BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, NOVEMBER 11, 2009 VETERANS DAY  
ALL DATA IN EASTERN STANDARD TIME
 
A LITTLE SUNSHINE EARLY TODAY BUT THEN
CLOUDY WITH COLD, GUSTY NNE WINDS
FOR THIS VETERANS DAY HOLIDAY
 
A little over an hour and a half's worth of
bright sunshine early today was followed by
overcast conditions with a layer of middle
or altocumulus clouds.  A scattering of
stratocumulus clouds was forming in the lower
layer of the atmosphere.  Visibility was
excellent up to 75 miles today but with no
sunshine and a gusty north-northeast wind
gusting up to 25 to 30 MPH the temperature
had dropped back from a high of 50F just after
9 a.m.to 46F by 1 p.m. 
 
Today's observations:
 
7 A.M.
Weather: Scattered altocumulus, thin overcast cirrus/cirrostratus,
break in overcast west thru north, sun dimly visible
Temperature: 45F, Dew point: 33F, Wind: N at 10 kts,
Wind: Direction variable NNW-NNE
Sea-level pressure: 30.38 inches Hg, rising
Visibility: 60 miles
6-hour minimum temp: 45F
24-hour precip: 0.00 
BHO SA 1155 100 SCT 160 SCT 250 –BKN 300 –OVC 60 286/45/33/3610/038/
BINOVC W-N SUN DISC VSB WND 33V03/ 8/077 52012 10049 20045
 
10 A.M.
Weather: Overcast with altocumulus translucidus, stratocumulus
forming in all quadrants, small break in overcast overhead,
higher clouds visible
Temperature: 48F, Dew point: 39F, Wind: N at 15G25 kts,
Wind: Direction variable from NNW to ENE 
Sea-level pressure: 30.42 inches Hg, rising
Visibility: 75 miles
BHO SA 1455 E130 OVC 75 301/49/38/0115G25/042/
FEW SC FRMG ALQDS HIER CLD VSB SML BINOVC OVHD
WND 33V06/ 8/537 53015  
 
1 P.M. 
Weather: Scattered stratocumulus, overcast altocumulus,
higher cirrostratus layer visible distant W-NNE, sun
occasionally dimly visible
Temperature: 46F, Dew point: 36F, Wind: NNE at 14G24 kts,
Wind: Direction variable NNW-ENE
Sea-level pressure: 30.41  inches Hg, falling
Visibility: 75 miles  
6-hourly max. temp: 50F
BHO SA 1755 50 SCT E130 OVC 75 297/46/36/0314G24/041/
SC ALQDS HIER CS LYR VSB DSNT W-NNE SUN OCNL DMLY VSB WND 34V07/
8/577 58004 10050 20045
 
WEATHER SUMMARY FOR TUESDAY, NOVEMBER 10
 
TEMPERATURE (DEGREES F)
MAX.....62     NORMAL.....51
MIN.....50     NORMAL.....36
MEAN....56     NORMAL.....44
 
DEPARTURE FROM 30-YEAR AVERAGE...........+12
TOTAL DEPARTURE FOR THE MONTH............+22 [+2.0 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............ 9    DEPARTURE.......-12
TOTAL HEATING UNITS FOR THE MONTH...........176    DEPARTURE.......-23
TOTAL HEATING UNITS FOR THE SEASON..........797    DEPARTURE........+7
TOTAL HEATING UNITS LAST SEASON TO DATE.....694    DIFFERENCE.....+103
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............23 SW  AT   1:59 A.M.   
                   AEROVANE..............23 SW  AT   1:59 A.M.  
                   ASOS..................22 SSW AT   1:59 A.M.  
                   DAVIS.................24 SW  AT   1:59 A.M.  
FASTEST MILE FOR YESTERDAY...............17 SSW AT  12:27 A.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE............17 SSW AT  12:33 A.M.  
MAXIMUM 2-MINUTE DAVIS AVERAGE...........18 SSW AT  12:57 A.M. 
AVERAGE WIND SPEED AND DIRECTION....... 9.2 SW
                   ASOS.................9.2
                   DAVIS................9.5 W [280 DEG]
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00   DEPARTURE....-0.15
                         ASOS..............0.00
TOTAL PRECIPITATION FOR MONTH  ............0.06   DEPARTURE....-1.46
                         ASOS..............0.04
TOTAL PRECIPITATION FOR THE YEAR..........45.17   DEPARTURE....+1.63
                         ASOS.............46.35
                 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.....-0.1
TOTAL SNOWFALL FOR THE MONTH................0.0  DEPARTURE.....-0.7
TOTAL SNOWFALL FOR THE SEASON...............3.0  DEPARTURE.....+2.1
                                               
PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 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
 
11/1  58/44/51/+4/0.05/167/27 22 WNW  
11/2  49/42/46/0/T/099/16     29 NE
11/3  57/36/47/+1/0/474/77    32 W    AERO 32 MPH W    
11/4  49/34/42/-4/0/514/84    24 W
11/5  46/36/41/-4/0.01/006/01 21 N
11/6  47/31/39/-6/0/419/69    38 WNW  AERO 38 MPH WNW
11/7  49/29/39/-6/0/575/95    33 S
11/8  66/42/54/+10/0/549/91   31 SSW
11/9  68/49/59/+15/0/486/81   35 S    AERO 35 MPH S
11/10 62/50/56/+12/0/000/00   23 SW 
 
11/11 our morning low temp: 45F; the normal low is now 36F
 
NEW DAILY RECORD FOR NOVEMBER 2009
None      
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR NOVEMBER 11
HIGH 68 IN 1984
LOW 17 IN 1956
PRECIP 1.14 INCHES IN 1991
SNOWFALL 2.5 IN 1986
PEAK GUST 64 NW IN 1962
 
RECORDS FOR NOVEMBER 12
HIGH 74 IN 1909
LOW 18 IN 1926
PRECIP 3.25 INCHES IN 1947
SNOWFALL 8.1 INCHES IN 1987
PEAK GUST 79e MPH NW IN 1947
 
TODAY'S REPORT PREPARED BY: Robert Skilling