BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, FEBRUARY 16, 2007
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.   
Weather: Clear
Temperature: 11F, Dew point: 0F, Wind: WSW AT 18G29 kts
Peak wind: WSW @ 30 kts at 6 mins. past the hour
Sea-level pressure: 29.57 inches Hg, falling
Visibility: 30 miles 
Snow on ground: 1.6 inches
6-hourly min. temp. 9 deg. 
BHO SA 1155 CLR 30 015/11/0/2418G29/957/ FEW SC ALQDS 
FEW CI NW-NE WND 18V32 PK WND 2430/06/ 8/501 4/002 58005 10011 20009
 
10 A.M.    
Weather: Clear
Temperature: 19F, Dew point: 3F, Wind: W at 28G39 kts
Peak wind: W @ 39 kts at 53 mins. past the hour
Sea-level pressure: 29.53 inches Hg, falling
Visibility: 55 miles
BHO SA 1455 CLR 55 001/19/3/2628G39/953/ FEW CU/SC ALQDS 
FEW CI W-NE PK WND 2639/53/ 8/101 58014
 
1 P.M.    
Weather: Scattered cumulus, broken cirrus 
Temperature: 26F, Dew point: 6F, Wind: W at 23G39 kts
Sea-level pressure: 29.52, falling 
Visibility: 65 miles 
6-hourly max. temp. 26 deg. 
BHO SA 1755 50 SCT E250 BKN 65 995/26/6/2623G39/952/ 
WND 20V31 PK WND 2540/05/ 8/101 58006 10026 20011
 
WEATHER SUMMARY FOR THURSDAY, FEBRUARY 15
 
TEMPERATURE (DEGREES F)
MAX.....21    NORMAL.....36 
MIN......9    NORMAL.....20   
MEAN....15    NORMAL.....28
 
DEPARTURE FROM 30-YEAR NORMAL.........-13
TOTAL DEPARTURE FOR THE MONTH.........-93 (-6.0 DEGREES/DAY) 
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY..........50   DEPARTURE.......+13
TOTAL HEATING UNITS FOR THE MONTH.........663   DEPARTURE.......+90 
TOTAL HEATING UNITS FOR THE SEASON.......3607   DEPARTURE......-502
TOTAL HEATING UNITS LAST SEASON TO DATE..3592   DIFFERENCE......+15
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............56   W   AT  4:55 P.M.     
                   AEROVANE.............53   W   AT  4:54 P.M.     
                   ASOS.................49   WSW AT 11:22 A.M.   
                   DAVIS................54   W   AT  4:54 P.M.     
FASTEST MILE FOR YESTERDAY..............40   W   AT  4:56 P.M. *   
MAXIMUM 2-MINUTE ASOS AVERAGE...........39   W   AT  4:57 P.M.    
MAXIMUM 2-MINUTE DAVIS AVERAGE..........40   W   AT  4:56 P.M.   
AVERAGE WIND SPEED AND DIRECTION......26.0   W 
                    ASOS..............24.5        
                    DAVIS.............25.2   W   [260 deg] 
* last of several occurrences..
 
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..........2.34  DEPARTURE.....+0.17  
                         ASOS..............2.35    
TOTAL PRECIPITATION FOR THE YEAR...........5.28  DEPARTURE.....-1.67  
                         ASOS..............5.22
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE......-0.6
TOTAL SNOWFALL FOR THE MONTH................2.3  DEPARTURE......-7.2
TOTAL SNOWFALL FOR THE SEASON...............8.9  DEPARTURE.....-30.0
 
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  26/15/21/-6/0/0/600/97         44 WSW  Aero 42 MPH WSW
2/10 32/13/23/-4/0/0/199/32         28 W     
2/11 31/14/23/-4/0/0/456/73         27 SSW  
2/12 36/20/28/0/0/0/602/96          43 WSW  Aero 40 MPH W  
2/13 22/6/14/-14/0.02/0.2/226/36    28 NW   
2/14 36/13/25/-3/2.09/1.4/000/00    47 NE   Aero 52 MPH NE
2/15 21/9/15/-13/0/0/616/97         46 W    Aero 53 MPH w
 
2/16 morning low temp. 9 deg; normal low now 20 deg.  
     
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR FEBRUARY 16
HIGH 62F IN 1954
LOW -16F IN 1943
PRECIP 1.91 INCHES IN 1958
SNOWFALL 18.6 INCHES IN 1958
PEAK GUST 78 MPH W IN 1967
 
RECORDS FOR FEBRUARY 17
HIGH 61F IN 1981
LOW -16F IN 1896
PRECIP 1.86 INCHES IN 2003
SNOWFALL 20.0 INCHES IN 2003
PEAK GUST 72 MPH NW IN 1968
 
TODAY'S REPORT By: Stephanie Radner