BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, NOVEMBER 7, 2009   
ALL DATA IN EASTERN STANDARD TIME 

BRIGHT SUNSHINE BUT VERY COOL TODAY...
Despite the full sunshine the temperature has only
climbed to the mid-40s as of early afternoon.  The
low temperature this morning was 29, which is the
coldest reading since 29 last occurred on April 13. 
The wind speed is once again very light today, and
the month of November is starting out dry with
light winds.  

Today's observations:

7 A.M. 
Weather: Scattered cirrus, few stratocumulus offshore ENE-SE
Temperature: 30F, Dew point: 27F, Wind: WSW at 7 kts 
Sea-level pressure: 30.30 inches Hg, rising
Visibility: 60 miles
6-hour minimum temp: 29F 
24-hourly precipitation: 0.00 in.
BHO SA 1155 250 -SCT 60 260/30/27/2407/030/ FEW SC ALG HRZN 
OFFSHORE ENE-SE WND LGT/ 8/501 53007 10031 20029

10 A.M. 
Weather: Scattered altocumulus, thin scattered cirrus, few
lower cirrus uncinus W, few distant stratocumulus E and SSE
Temperature: 39F, Dew point: 26F, Wind: SW at 7 kts  
Sea-level pressure: 30.29 inches Hg, falling
Visibility: 70 miles  
BHO SA 1455 140 SCT 250 –SCT 70 258/39/26/2307/029/ FEW LWR 
CI W FEW SC DSNT E AND SSE/ 8/531 58002

1 P.M.  
Weather: Thin scattered cirrus, few altocumulus
Temperature: 45F, Dew point: 23F, Wind: SW at 6 kts
Sea-level pressure: 30.21 inches Hg, falling
Visibility: 70 miles   
6-hourly max. temp: 46F  
BHO SA 1755 250 –SCT 70 231/45/23/2306/021/ FEW AC NNE-E AND 
DSNT SW WND LGT AND VRB/ 8/031 58027 10046 20030

WEATHER SUMMARY FOR FRIDAY, NOVEMBER 6

TEMPERATURE (DEGREES F)
MAX.....47     NORMAL.....53
MIN.....31     NORMAL.....37
MEAN....39     NORMAL.....45

DEPARTURE FROM 30-YEAR AVERAGE........... -6
TOTAL DEPARTURE FOR THE MONTH.............-9 [-1.7 DEGREES/DAY]

HEATING DEGREE DAYS 
TOTAL HEATING UNITS FOR YESTERDAY............26    DEPARTURE........+6
TOTAL HEATING UNITS FOR THE MONTH...........124    DEPARTURE........+8
TOTAL HEATING UNITS FOR THE SEASON..........745    DEPARTURE.......+38
TOTAL HEATING UNITS LAST SEASON TO DATE.....640    DIFFERENCE.....+105

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............38 WNW AT  3:27 P.M. 
                   AEROVANE..............38 WNW AT  3:27 P.M.
                   ASOS..................37 WNW AT  3:27 P.M.
                   DAVIS.................38 W   AT  3:26 P.M.
FASTEST MILE FOR YESTERDAY...............26 WNW AT  3:31 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE............26 NW  AT  3:31 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE...........29 WNW AT  3:31 P.M.
AVERAGE WIND SPEED AND DIRECTION.......13.5 NW
                   ASOS................13.2
                   DAVIS...............13.7 WNW [302 DEG]
* last of several occurrences

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....-0.84
                         ASOS..............0.04
TOTAL PRECIPITATION FOR THE YEAR..........45.17   DEPARTURE....+2.25
                         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.....-0.3
TOTAL SNOWFALL FOR THE SEASON...............3.0  DEPARTURE.....+2.5
	 							
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/.../.. 22 WNW   
11/2  49/42/46/0/T/.../..     29 NE 
11/3  57/36/47/+1/0/.../..    32 W    AERO 32 MPH W     
11/4  49/34/42/-4/0/.../..    24 W
11/5  46/36/41/-4/0.01/.../.. 21 N
11/6  47/31/39/-6/0/.../..    38 WNW  AERO 38 MPH WNW

11/7  morning low temp: 29F; the normal low is now 37F

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 7
HIGH 75 IN 1938
LOW 21 IN 1930
PRECIP 2.02 INCHES IN 1953
SNOWFALL 1.0 IN 1967
PEAK GUST 69e ENE IN 1953

RECORDS FOR NOVEMBER 8
HIGH 72 IN 1938
LOW 20 IN 1921
PRECIP 2.24 INCHES IN 1972
SNOWFALL 4.0 IN 1894
PEAK GUST 72e SE IN 1947

TODAY'S REPORT PREPARED BY: Mike Iacono