BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JANUARY 25, 2009 
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.
Weather: Clear with a few clouds
Temperature: 3F, Dew point: -5F, Wind: SW at 10 kt
Sea-level pressure: 30.28 inches Hg, steady
Visibility: 40 miles
6-hour minimum temperature: 3F
Snow depth on ground: 12 inches
BHO SA 1155 CLR 40 253/3/-5/2310/028/
FEW SC NE-SE FEW CI NE AND SW HAZY/ 8/401 4/012 53003 
10008 20003
 
10 A.M.
Weather: Clear with a few clouds
Temperature: 12F, Dew point: -1F, Wind: SSW at 10 kt
Sea-level pressure: 30.29 inches Hg, steady
Visibility: 55 miles
BHO SA 1455 CLR 55 257/12/-1/2110/029/
FEW THN CI S FEW SC DSNT NE/ 8/401 50004
 
1 P.M.  
Weather: Thin scattered cirrus
Temperature: 21F, Dew point: 0F, Wind: SSW at 15kt
Sea-level pressure: 30.22 inches Hg, falling
Visibility: 55 miles
6-hour maximum temperature: 21F
BHO SA 1755 250 –SCT 55 234/21/0/2015/022/
FEW SC NE/ 8/401 58023 10021 20003
 
WEATHER SUMMARY FOR SATURDAY, JANUARY 24
 
TEMPERATURE (DEGREES F)
MAX.....36    NORMAL.....33 
MIN......9    NORMAL.....18
MEAN....23    NORMAL.....26
 
DEPARTURE FROM 30-YEAR NORMAL...............-3
TOTAL DEPARTURE FOR THE MONTH..............-92  [-4.0 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............42  DEPARTURE.........+2
TOTAL HEATING UNITS FOR THE MONTH...........1028  DEPARTURE........+94
TOTAL HEATING UNITS FOR THE SEASON..........3268  DEPARTURE.........+5
TOTAL HEATING UNITS LAST SEASON TO DATE.....2981  DIFFERENCE......+287
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............40   W AT  10:57 A.M. *
                   AEROVANE.............42   W AT  10:57 A.M.
                   ASOS.................41  NW AT   2:25 P.M.
                   DAVIS................40 WSW AT  11:00 A.M.
FASTEST MILE FOR YESTERDAY..............33   W AT  10:24 A.M.  
MAXIMUM 2-MINUTE ASOS AVERAGE...........31   W AT  10:25 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..........29   W AT   1:04 P.M.
                   AVERAGE............19.8 W
                   ASOS...............18.0
                   DAVIS..............18.6 W [261 deg]  
* Last of several occurrences
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.00  DEPARTURE.........-0.15
                         ASOS...............0.00
TOTAL PRECIPITATION FOR THE MONTH...........2.86  DEPARTURE.........-0.87
                         ASOS...............3.94 #
TOTAL PRECIPITATION FOR THE YEAR............2.86  DEPARTURE.........-0.87
                         ASOS...............3.94 #
# 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...............20.6   DEPARTURE.........+8.6
TOTAL SNOWFALL FOR THE SEASON..............51.0   DEPARTURE........+25.4
 
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     Aero 48 MPH W
1/15 16/5/11/-15/0/0/000/00          20 NW
1/16 17/0/9/-17/0/0/557/98           26 W
1/17 19/1/10/-16/0/0/450/79          23 W
1/18 29/14/22/-4/0.58/9.5/000/00     24 E
1/19 32/19/26/+1/0.24/3.5/057/10     18 NW
1/20 30/17/24/-1/T/T/247/43          30 NW
1/21 23/9/16/-9/0/0/.../..           25 SW
1/22 31/14/23/-2/0/0/.../..          31 SW
1/23 39/24/32/+7/0/0/.../..          31 S
1/24 36/9/23/-3/0/0/.../..           40 W
    
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 25
HIGH 55F IN 1990
LOW -10F IN 1935
PRECIP 2.24 INS. IN 1979
SNOWFALL 12.5 INS. IN 1941
PEAK GUST 81 MPH WNW IN 1972
 
RECORDS FOR JANUARY 26
HIGH 68F IN 1950 [RECORD FOR MONTH]
LOW -5F IN 1920
PRECIP 1.60 INS. IN 1958
SNOW 9.0 INS. IN 1898
WIND 90e MPH SE IN 1978
 
TODAY'S REPORT PREPARED By: Andrew Hoell