BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, JANUARY 15, 2009
ALL TIMES ARE IN EASTERN STANDARD TIME
 
7 A.M.
Weather: Overcast altostratus, few stratocumulus distant N-NE
Temperature: 8F, Dew point: -3F, Wind: NW at 7 kts
Sea-level pressure: 30.18 inches Hg, rising  
Visibility: 40 miles
6-hour minimum temperature: 7F
Snow depth on ground: 7 inches
BHO SA 1155 E65 OVC 40 219/8/-3/3207/018/
FEW LWR SC DSNT N-NE DRK K LYR ALQDS XCPT SW-NW/
8/5// 4/007 53003 10009 20007
 
10 A.M.
Weather: Overcast altostratus, few stratocumulus
distant NE-E, thin spots in overcast, sun visible
Temperature: 12F, Dew point: -3F, Wind: N at 7 kts
Sea-level pressure: 30.21 inches Hg, rising
Visibility: 35 miles
BHO SA 1455 E55 OVC 35 230/12/-3/3507/021/
FEW SC DSNT NE-E THN SPTS IOVC SUN VSBL/ 8/52/ 52011
 
1 P.M.  
Weather: Overcast altostratus, few stratocumulus distant NE
Temperature: 14F, Dew point: -5F, Wind: NW at 11G17 kts,
Wind: direction variability WSW-N
Sea-level pressure: 30.17 inches Hg, falling
Visibility: 50 miles
6-hour maximum temperature: 14F
BHO SA 1755 E55 OVC 50 217/14/-5/3110G17/017/
FEW SC DSNT NE WND 25V35/ 8/52/ 58013 10014 20008
 
WEATHER SUMMARY FOR WEDNESDAY, JANUARY 14
 
TEMPERATURE (DEGREES F)
MAX.....33    NORMAL.....34 
MIN.....10    NORMAL.....18
MEAN....22    NORMAL.....26
 
DEPARTURE FROM 30-YEAR NORMAL...............-4
TOTAL DEPARTURE FOR THE MONTH..............-33  [-2.6 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............43  DEPARTURE.........+4
TOTAL HEATING UNITS FOR THE MONTH............574  DEPARTURE........+34
TOTAL HEATING UNITS FOR THE SEASON..........2814  DEPARTURE........-55
TOTAL HEATING UNITS LAST SEASON TO DATE.....2586  DIFFERENCE......+228
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............47 W   AT  5:52 A.M.   
                   AEROVANE.............48 W   AT  5:52 A.M.  
                   ASOS.................45 WNW AT  5:52 A.M.       
                   DAVIS................43 W   AT  5:51 A.M.        
FASTEST MILE FOR YESTERDAY..............35 W   AT  5:51 A.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...........32 WNW AT  5:53 A.M.  
MAXIMUM 2-MINUTE DAVIS AVERAGE..........33 W   AT  5:53 A.M.           
                   AVERAGE............16.0 W
                   ASOS...............16.0
                   DAVIS..............14.6 W [270 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...........2.04  DEPARTURE.........-0.12
                         ASOS...............3.02 #
TOTAL PRECIPITATION FOR THE YEAR............2.04  DEPARTURE.........-0.12
                         ASOS...............3.02 #
# Includes erroneous ASOS precipitation data on 1/1/09 and 1/2/09
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0   DEPARTURE.........-0.5
TOTAL SNOWFALL FOR THE MONTH................7.6   DEPARTURE.........+0.6
TOTAL SNOWFALL FOR THE SEASON..............38.0   DEPARTURE........+17.4
 
PRELIMINARY CLIMATE SUMMARY FOR JANUARY 2009 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane recording wind system gust when significant
   TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
 
1/1  16/1/9/-18/0/0/538/98           44 WNW   Aero 44 MPH WNW
1/2  32/9/21/-6/0/0/005/01           28 S
1/3  32/21/27/0/T/T/539/98           43 WNW   Aero 44 MPH WNW
1/4  35/17/26/-1/0/0/512/93          36 W     Aero 33 MPH W
1/5  36/26/31/+4/0.06/0/512/93       30 W   
1/6  33/21/27/+1/0/0/183/33          27 W 
1/7  36/26/31/+5/1.26/0.8/000/00     46 NE    Aero 45 MPH NE
1/8  38/21/30/+4/0.01/0.1/389/70     47 W     Aero 45 MPH W
1/9  25/16/21/-5/0/0/546/98          37 W     Aero 36 MPH W
1/10 24/11/18/-8/0.10/1.0/329/59     28 W
1/11 31/19/25/-1/0.55/5.3/000/00     30 NW
1/12 27/18/23/-3/0.02/0.4/410/73     24 WNW
1/13 34/16/25/-1/0.04/T/107/19       25 SE
1/14 33/10/22/-4/0/0/518/92          47 W
 
1/15 morning low temp: 7F; our normal low is now 18F
    
NEW DAILY RECORDS FOR JANUARY 2009...
 
..NONE..
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR JANUARY 15
HIGH 64F IN 1995
LOW -16F IN 1957 [RECORD FOR MONTH]
PRECIP 2.63 INS. IN 1958
SNOWFALL 8.8 INS. IN 1983
PEAK GUST 69e MPH SE IN 1940
 
RECORDS FOR JANUARY 16
HIGH 63F IN 1995
LOW -12F IN 2004
PRECIP 1.32 INS. IN 1936
SNOWFALL 14.0 INS. IN 1965
PEAK GUST 79 MPH WNW IN 1960
 
TODAY'S REPORT PREPARED By: Stephanie Radner