BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, FEBRUARY 3, 2007
ALL TIMES ARE IN EASTERN STANDARD TIME

LIGHT RAIN AND SNOW FRIDAY NIGHT...MOSTLY SUNNY
TODAY WITH COLDER AIR RETURNING...
The total of 0.23 inch melted precipitation late
Friday into very early this morning fell as rain 
from 8:30 to 10:30 PM, mixed with snow for a short
time, then continued as snow through about 1 AM.
A total of 0.7 of crusty new snow was measured on
the snow boards this morning.  The temperature was
33 during the rain, 32 during the snow and it held at
31 through 4 AM before dropping to the morning low
of 21 at 8 AM. Drier air has been moving in all day
and the dew point has dropped to 5 deg F as of 1 PM
today, with the visibility climbing to 70 miles. 

The ASOS wind vane has been frozen since about 2 AM
this morning, so KMQE has not been reporting wind
speed or direction since that time.  Our other wind
systems are functioning properly. 

JANUARY 2007 Summary
Temp Avg Max: 37.7 [+3.9]
Temp Avg Min: 22.8 [+4.7]
Temp Avg Mean: 30.3 [+4.3]
HDD: 1071 [-136]
Precipitation: 2.94 inches [-1.84]
Snowfall: 2.9 inches [-12.9]
Mean Wind Speed: 14.3 mph, W
Peak Wind Gust: 51 mph W (20th)
Mean Vapor Pressure: 4.4 mb


Today's observations:

7 A.M.   
Weather: Clear, few cirrus and stratocumulus
Temperature: 22F, Dew point: 15F, Wind: W at 16 kts 
Sea-level pressure: 29.68 inches Hg, rising rapidly
Visibility: 35 miles 
24-hour precipitation: 0.23 inch
24-hour snowfall: 0.7 inch
Snow on ground: 1 inch
6-hourly min. temp. 22 deg. 
BHO SA 1155 CLR 35 051/22/15/2716/968/ FEW CI DSNT SW 
SC DSNT N-SE PRESRR TOTAL NEW SNW PST 24 HRS 0.7 IN/ 
8/501 4/001 53047 70023 10032 20022

10 A.M.    
Weather: Clear, few cirrus and small cumulus
Temperature: 23F, Dew point: 12F, Wind: W at 15G29 kts 
Sea-level pressure: 29.80 inches Hg, rising      
Visibility: 45 miles 
BHO SA 1455 CLR 45 092/23/12/2715G29/980/ FEW CI DSNT SSE 
FEW SML CU DSNT ESE-NNW PK WND 2732/30/ 8/101 51041

1 P.M.    
Weather: Scattered cumulus
Temperature: 25F, Dew point: 5F, Wind: W at 16G27 kts 
Sea-level pressure: 29.78 inches Hg, falling 
Visibility: 70 miles
6-hourly max. temp. 26 deg.  
BHO SA 1755 40 SCT 70 085/25/5/2716G27/978/ PK WND 2630/
1657/ 8/100 58007 10026 20021


WEATHER SUMMARY FOR FRIDAY, FEBRUARY 2

TEMPERATURE (DEGREES F)
MAX.....35    NORMAL.....34 
MIN.....28    NORMAL.....18   
MEAN....32    NORMAL.....26

DEPARTURE FROM 30-YEAR NORMAL.........+6 
TOTAL DEPARTURE FOR THE MONTH.........+8 (+3.8 DEGREES/DAY) 
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY..........33   DEPARTURE.......-6
TOTAL HEATING UNITS FOR THE MONTH..........70   DEPARTURE.......-8 
TOTAL HEATING UNITS FOR THE SEASON.......3014   DEPARTURE.....-600
TOTAL HEATING UNITS LAST SEASON TO DATE..3155   DIFFERENCE....-141
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............20 NW  AT 11:13 P.M.*  
                   AEROVANE.............20 NW  AT 11:10 P.M.    
                   ASOS.................18 NW  AT 11:10 P.M.  
                   DAVIS................20 WNW AT 11:12 P.M.  
FASTEST MILE FOR YESTERDAY..............15 NW  AT 11:12 P.M.   
MAXIMUM 2-MINUTE ASOS AVERAGE...........15 NW  AT 11:10 P.M.  
MAXIMUM 2-MINUTE DAVIS AVERAGE..........16 ESE AT  8:41 P.M.   
AVERAGE WIND SPEED AND DIRECTION.......7.7 NNW 
                    ASOS...............7.1       
                    DAVIS..............6.8 NNE [25 deg]   
* last of several occurrences..

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.23  DEPARTURE.....+0.08
                         ASOS..............0.22
TOTAL PRECIPITATION FOR THE MONTH..........0.23  DEPARTURE.....-0.07  
                         ASOS..............0.22    
TOTAL PRECIPITATION FOR THE YEAR...........3.17  DEPARTURE.....-1.91  
                         ASOS..............3.09 

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.7  DEPARTURE......+0.1
TOTAL SNOWFALL FOR THE MONTH................0.7  DEPARTURE......-0.5
TOTAL SNOWFALL FOR THE SEASON...............7.3  DEPARTURE.....-23.3


PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY 2007......CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOWFALL/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST

AERO: Aerovane recording wind system when significant
TSTM: Thunderstorm day
....: Data not yet available

2/1  35/20/28/+2/0/0/132/22         37 S    Aero 34 MPH S
2/2  35/28/32/+6/0.18/0.3/.../..    20 NW

2/3 morning low temp. 21 deg; normal now 18 deg.   


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

RECORDS FOR FEBRUARY 3
HIGH 58F IN 1991
LOW  -7F IN 1955
PRECIP 2.14 INS. IN 1970
SNOWFALL 7.0 INS. IN 1913
PEAK GUST 102 MPH S IN 1970 [RECORD FOR MONTH]

RECORDS FOR FEBRUARY 4
HIGH 63F IN 1991
LOW  -4F IN 1886, 1908
PRECIP 1.80 INS. IN 1926
SNOWFALL 15.0 INS. IN 1961
PEAK GUST 89 MPH SSE IN 1972

TODAY'S REPORT By: Mike Iacono