BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, JANUARY 5, 2008
ALL TIMES ARE IN EASTERN STANDARD TIME

WARMER AIR RETURNING ON SOUTHERLY WINDS TODAY...
After several very cold days, the temperture rose above
freezing today for the first time since last Tuesday.  
The high and low so far for today of 38 and 24 are
already warmer than average.  The first four days of
January were nearly 9 degrees colder than average. 
Much warmer weather is expected over next few days. 

Today's observations:

7 A.M.   
Weather: Broken altocumulus, overcast cirrus
Temperature: 27F, Dew point: 13F, Wind: SW at 9 kts
Sea-level pressure: 30.37 inches Hg, rising
Visibility: 40 miles
6-hour min temp: 25F 
Snow on ground: 1 inch
BHO SA 1155 E90 BKN 250 OVC 40 285/27/13/2309/037/ 
BINOVC ALQDS/ 8/071 4/001 51003 10027 20025

10 A.M.
Weather: Scattered altocumulus, thin broken cirrus
Temperature: 32F, Dew point: 14F, Wind: SSW at 5 kts 
Sea-level pressure: 30.37 inches Hg, steady
Visibility: 30 miles, hazy
BHO SA 1455 100 SCT 250 –BKN 30 285/32/14/2105/037/ 
HAZY WND LGT/ 8/031 50000

1 P.M.
Weather: Scattered altocumulus, overcast cirrus
Temperature: 37F, Dew point: 14F, Wind: SSW at 10 kts
Sea-level pressure: 30.31 inches Hg, falling
Visibility: 40 miles, hazy 
6-hourly max. temp. 37F
BHO SA 1755 85 SCT 250 OVC 40 265/37/14/2010/031/ HAZY 
FEW BINOVC DSNT NE SUN VSBL/ 8/031 56020 10037 20027

WEATHER SUMMARY FOR FRIDAY, JANUARY 4

TEMPERATURE (DEGREES F)
MAX.....30    NORMAL.....34 
MIN......2    NORMAL.....19
MEAN....16    NORMAL.....27
DEPARTURE FROM 30-YEAR NORMAL..........-11 
TOTAL DEPARTURE FOR THE MONTH..........-34 [-8.7 DEGREES/DAY] 

HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............49  DEPARTURE......+11 
TOTAL HEATING UNITS FOR THE MONTH...........186  DEPARTURE......+34 
TOTAL HEATING UNITS FOR THE SEASON.........2353  DEPARTURE.....-128
TOTAL HEATING UNITS LAST SEASON TO DATE....1967  DIFFERENCE....+386

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............31 SSW AT  9:45 A.M. 
                   AEROVANE.............30 SSW AT 10:00 A.M. *    
                   ASOS.................29 SW  AT 10:01 A.M. 
                   DAVIS................35 SSW AT  9:45 A.M. 
FASTEST MILE FOR YESTERDAY..............24 SSW AT 10:00 A.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...........23 SW  AT 10:02 A.M. 
MAXIMUM 2-MINUTE DAVIS AVERAGE..........28 SSW AT 10:01 A.M. 
AVERAGE WIND SPEED AND DIRECTION.......12.5 WSW
                   ASOS................12.0    
                   DAVIS...............12.3 SW [230 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 THE MONTH..........0.24  DEPARTURE....-0.36
                         ASOS..............0.23  
TOTAL PRECIPITATION FOR THE YEAR...........0.24  DEPARTURE....-0.36
                         ASOS..............0.23   

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.....-0.5
TOTAL SNOWFALL FOR THE MONTH................1.8  DEPARTURE.....-0.2
TOTAL SNOWFALL FOR THE SEASON..............32.3  DEPARTURE....+16.7

PRELIMINARY CLIMATE SUMMARY FOR JANUARY 2008 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
 
AERO: Aerovane recording wind system when significant
TSTM: Thunderstorm day
....: Data not yet available

1/1   38/28/33/+6/0.24/1.8/055/10   30 E   
1/2   29/7/18/-9/T/T/006/01         43 NW
1/3   11/2/7/-20/0/0/540/98         35 NW
1/4   30/2/16/-11/0/0/.../..        31 SSW

1/5   morning low temp. 24F; normal low is now 19F
 
NEW DAILY RECORDS FOR JANUARY 2008: 
No new daily records.

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):

RECORDS FOR JANUARY 5
HIGH 61F IN 2007
LOW -9F IN 1981
PRECIP 0.98 INS. IN 1993
SNOW 4.5 INS. IN 1891
WIND 70 MPH WNW IN 1959

RECORDS FOR JANUARY 6
HIGH 66F IN 2007
LOW -14F IN 1896
PRECIP 3.10 INS. IN 1889 [RECORD FOR MONTH]
SNOWFALL 7.5 INS. IN 1893
WIND 70 MPH WNW IN 1959

TODAY'S REPORT PREPARED By: Mike Iacono

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