BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, FEBRUARY 9, 2007
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.   
Weather: Clear, few clouds
Temperature: 15F, Dew point: 2F, Wind: SW AT 14 kts   
Sea-level pressure: 29.73 inches Hg, rising
Visibility: 30 miles  
Snow on ground: trace
6-hourly min. temp. 15 deg. 
BHO SA 1155 CLR 30 066/15/2/2314/973/ CUFRMG TOPS NE-E 
FEW SC ALQDS K LYR WSW-N/ 8/500 53005 10019 20015
 
10 A.M.    
Weather: Broken stratocumulus  
Temperature: 20F, Dew point: 5F, Wind: WSW at 18G23 kts
Peak wind last hour: 27 kts WSW at 9:00 A.M.
Sea-level pressure: 29.73 inches Hg, rising     
Visibility: 60 miles
BHO SA 1455 40 SCT E50 BKN 60 067/20/5/2518G23/973/ 
PK WND 2427/00 8/500 50001
 
1 P.M.    
Weather: Scattered stratocumulus
Temperature: 25F, Dew point: 2F, Wind: W at 20G31 kts
Peak wind last hour:  35 kts WSW at 12:10 P.M.
Sea-level pressure: 29.71 inches Hg, falling     
Visibility: 70 miles 
6-hour max. temp. 27 deg. 
BHO SA 1755 55 SCT 70 061/25/2/2720G31/971/ PK WND 2535/10/ 
8/500 58006 10027 20015
 
WEATHER SUMMARY FOR THURSDAY, FEBRUARY 8
 
TEMPERATURE (DEGREES F)
MAX.....25    NORMAL.....35 
MIN.....11    NORMAL.....19   
MEAN....18    NORMAL.....27
 
DEPARTURE FROM 30-YEAR NORMAL..........-9 
TOTAL DEPARTURE FOR THE MONTH.........-49 (-5.9 DEGREES/DAY) 
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY..........47   DEPARTURE........+8
TOTAL HEATING UNITS FOR THE MONTH.........357   DEPARTURE.......+47 
TOTAL HEATING UNITS FOR THE SEASON.......3301   DEPARTURE......-545
TOTAL HEATING UNITS LAST SEASON TO DATE..3319   DIFFERENCE......-18
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............48  WSW AT  2:31 P.M.    
                   AEROVANE.............47  WSW AT  2:31 P.M.    
                   ASOS.................44  WSW AT  2:31 P.M.   
                   DAVIS................47  W   AT  2:21 P.M.    
FASTEST MILE FOR YESTERDAY..............37  W   AT  2:32 P.M.    
MAXIMUM 2-MINUTE ASOS AVERAGE...........37  W   AT  2:32 P.M.   
MAXIMUM 2-MINUTE DAVIS AVERAGE..........37  WSW AT  2:32 P.M.     
AVERAGE WIND SPEED AND DIRECTION......19.2 W
                    ASOS..............18.4        
                    DAVIS.............18.4 WSW [251 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 THE MONTH..........0.23  DEPARTURE.....-0.96  
                         ASOS..............0.22    
TOTAL PRECIPITATION FOR THE YEAR...........3.17  DEPARTURE.....-2.80  
                         ASOS..............3.09
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE......-0.7
TOTAL SNOWFALL FOR THE MONTH................0.7  DEPARTURE......-4.6
TOTAL SNOWFALL FOR THE SEASON...............7.3  DEPARTURE.....-27.4

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/+2/0/0/126/21         37 S    Aero 34 MPH S
2/2  35/28/32/+6/0.18/0.3/000/00    20 NW
2/3  32/19/26/0/0.05/0.4/574/95     39 W    Aero 47 MPH W  
2/4  22/10/16/-10/0/0/601/99        39 WSW  Aero 40 MPH WSW
2/5  16/5/11/-16/0/0/493/81         61 W    Aero 60 MPH W  
2/6  24/10/17/-10/0/0/593/97        38 W    Aero 36 MPH W 
2/7  21/8/15/-12/0/0/474/77         43 W    Aero 41 MPH W
2/8  25/11/18/-9/0/0/370/60         48 WSW
       
2/9  morning low temp. 15 deg; normal now 19 deg.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR FEBRUARY 9
HIGH 58F IN 1990
LOW -21F IN 1934 [LOWEST TEMPERATURE ON RECORD]
PRECIP 2.12 INS. IN 1969
SNOWFALL 13.0 INS. IN 1969
PEAK GUST 89 MPH NE IN 1969
 
RECORDS FOR FEBRUARY 10
HIGH 56F IN 1909
LOW  -8F IN 1899
PRECIP 1.34 INS. IN 1909
SNOWFALL 12.1 INS. IN 1926
PEAK GUST 64 MPH W IN 2001
 
TODAY'S REPORT By: Stephanie Radner