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Climatological Report (Daily)
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CDUS43 KLOT 100649
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1239 AM CST WED FEB 10 2010


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...THE CHICAGO-OHARE IL CLIMATE SUMMARY FOR FEBRUARY 9 2010...

CLIMATE NORMAL PERIOD 1971 TO 2000
CLIMATE RECORD PERIOD 1871 TO 2010


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         28   1029 PM  56    1886  33     -5       53
  MINIMUM         23    454 AM -21    1899  18      5       26
  AVERAGE         26                        25      1       40

PRECIPITATION (IN)
  YESTERDAY        0.65          1.56 1876   0.06   0.59     0.12
  MONTH TO DATE    0.77                      0.47   0.30     0.12
  SINCE DEC 1      4.63                      4.65  -0.02     7.05
  SINCE JAN 1      1.90                      2.22  -0.32     1.28

SNOWFALL (IN)
  YESTERDAY       12.6 R         8.9  1885   0.3   12.3      0.0
  MONTH TO DATE   14.9                       2.7   12.2      T
  SINCE DEC 1     44.8                      22.7   22.1     43.4
  SINCE JUL 1     44.8                      24.8   20.0     44.0

DEGREE DAYS
 HEATING
  YESTERDAY       39                        40     -1       25
  MONTH TO DATE  340                       370    -30      362
  SINCE DEC 1   2856                      2854      2     3180
  SINCE JUL 1   4009                      4141   -132     4386

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE DEC 1      0                         0      0        0
  SINCE JAN 1      0                         0      0        0
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    21   HIGHEST WIND DIRECTION     N (10)
  HIGHEST GUST SPEED    26   HIGHEST GUST DIRECTION     N (10)
  AVERAGE WIND SPEED    10.7


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 1.0


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  SNOW
  LIGHT SNOW
  FOG
  FOG W/VISIBILITY <= 1/4 MILE


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    96           500 AM
 LOWEST     68           100 AM
 AVERAGE    82

..........................................................


THE CHICAGO-OHARE IL CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   33        63      1876
 MINIMUM TEMPERATURE (F)   18       -18      1899


SUNRISE AND SUNSET
FEBRUARY 10 2010......SUNRISE   654 AM CST   SUNSET   518 PM CST
FEBRUARY 11 2010......SUNRISE   653 AM CST   SUNSET   519 PM CST


-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.




$$
National Weather Service Weather Forecast Office
