BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JANUARY 17, 2007
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.   
Weather: Clear with a few clouds 
Temperature: 7F, Dew point: -6F, Wind: WNW at 17G24 kt 
Sea-level pressure: 30.51 inches Hg, rising
Visibility: 50 miles
BHO SA 1155 CLR 50 332/7/-6/2917G24/051/ 
FEW SC N-S/ 8/400 53042 10013 20007
 
10 A.M.    
Weather: Clear with a few clouds
Temperature: 10F, Dew point: -6F, Wind: WNW at 14G19 kt 
Sea-level pressure: 30.60 inches Hg, rising   
Visibility: 65 miles  
BHO SA 1455 CLR 65 363/10/-6/3014G19/060/ 
FEW SC ALQDS/ 8/400 51031
 
1 P.M.    
Weather: Clear with a few clouds 
Temperature: 16F, Dew point: -1F, Wind: W at 14G19 kt 
Sea-level pressure: 30.60 inches Hg, steady 
Visibility: 70 miles
BHO SA 1755 CLR 70 364/16/-1/2814G19/060/ 
FEW SC NW-E/ 8/400 50001 10016 20007
 
WEATHER SUMMARY FOR TUESDAY, JANUARY 16 
 
TEMPERATURE (DEGREES F)
MAX.....38   NORMAL.....33 
MIN.....15   NORMAL.....18   
MEAN....27   NORMAL.....26
 
DEPARTURE FROM 30-YEAR NORMAL.........+1 
TOTAL DEPARTURE FOR THE MONTH.......+212 (+13.1 DEGREES/DAY) 
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY..........38   DEPARTURE.......-1
TOTAL HEATING UNITS FOR THE MONTH.........407   DEPARTURE.....-211 
TOTAL HEATING UNITS FOR THE SEASON.......2280   DEPARTURE.....-667
TOTAL HEATING UNITS LAST SEASON TO DATE..2654   DIFFERENCE....-374
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............40 W AT 7:13 A.M.                  
                   AEROVANE.............42 W AT 7:15 A.M.                         
                   ASOS.................37 W AT 7:14 A.M.                      
                   DAVIS................42 W                 
FASTEST MILE FOR YESTERDAY..............28 W AT 6:44 A.M.      
MAXIMUM 2-MINUTE ASOS AVERAGE...........28 W AT 6:46 A.M.            
MAXIMUM 2-MINUTE DAVIS AVERAGE..........29 W                  
AVERAGE WIND SPEED AND DIRECTION......15.7 WNW 
                    ASOS..............15.8    
                    DAVIS.............16.1 WNW [285 deg.]
 
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.16
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........2.62  DEPARTURE......+0.16 
                         ASOS..............2.57    
TOTAL PRECIPITATION FOR THE YEAR...........2.62  DEPARTURE......+0.16
                         ASOS..............2.57
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0   DEPARTURE.....-0.5
TOTAL SNOWFALL FOR THE MONTH................0.0   DEPARTURE.....-8.0
TOTAL SNOWFALL FOR THE SEASON...............3.7   DEPARTURE....-17.9
 
PRELIMINARY CLIMATE SUMMARY FOR JANUARY 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
 
1/1  53/30/42/+15/0.98/0/000/00     38 SE 
1/2  43/31/37/+10/0.03/0/505/92     44 W    Aero 47 MPH W   
1/3  49/30/40/+13/0/0/435/79        40 S   
1/4  53/40/47/+20/0/0/198/36        31 SSW
1/5  61/46/54/+27/0.04/0/000/00     44 S    Aero 44 MPH S
1/6  66/48/57/+31/0.03/0/161/29     48 SSW  Aero 47 MPH SSW 
1/7  50/38/44/+18/0/0/505/91        43 W    Aero 44 MPH W 
1/8  52/36/44/+18/0.69/0/000/00     45 W    Aero 45 MPH W 
1/9  41/29/35/+9/0/0/518/93         40 W    Aero 39 MPH W
1/10 34/22/28/+2/0/0/525/94         48 W
1/11 33/17/25/-1/0/0/.../..         36 S    Aero 38 MPH S
1/12 48/32/40/+14/0/0/.../..        38 SSW  Aero 39 MPH SSW
1/13 48/36/42/+16/0.06/000/00       30 S     
1/14 38/31/35/+9/../0/000/00        21 NE
1/15 40/31/36/+10/../0/000/00       25 NNE
1/16 38/15/27/+1/../0/.../..        40 W    Aero 42 MPH W
      
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR JANUARY 17
HIGH 55F IN 1973,1995
LOW -8F IN 1907,1982
PRECIP 1.43 INCHES IN 1956
SNOWFALL 13.4 INCHES IN 1956
PEAK GUST 62 MPH S IN 1994
 
RECORDS FOR JANUARY 18
HIGH 62F IN 1973,1990
LOW -10F IN 1982
PRECIP 1.68 INCHES IN 1915
SNOWFALL 13.0 INCHES IN 1948
PEAK GUST 85 MPH SSE IN 2006
 
TODAY'S REPORT By: Andrew Hoell