PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6)

                                          STATION:   CHICAGO-OHARE
                                          MONTH:     DECEMBER
                                          YEAR:      2014
                                          LATITUDE:   41 58 N                   
                                          LONGITUDE:  87 54 W                   

  TEMPERATURE IN F:       :PCPN:    SNOW:  WIND      :SUNSHINE: SKY     :PK WND 
================================================================================
1   2   3   4   5  6A  6B    7    8   9   10  11  12  13   14  15   16   17  18
                                     12Z  AVG MX 2MIN
DY MAX MIN AVG DEP HDD CDD  WTR  SNW DPTH SPD SPD DIR MIN PSBL S-S WX    SPD DR
================================================================================

 1  25  18  22 -11  43   0 0.00  0.0    0 11.7 21 340   M    M   9        26 340
 2  34  18  26  -6  39   0    T    T    0 10.0 18 250   M    M   6 18     24 260
 3  37  24  31  -1  34   0 0.00  0.0    0 10.5 17 270   M    M   3        22 230
 4  35  23  29  -2  36   0 0.00  0.0    0  7.6 13 140   M    M  10        17 140
 5  40  32  36   5  29   0 0.00  0.0    0  4.6 13 150   M    M  10 18     16 140
 6  40  26  33   2  32   0 0.00  0.0    0 11.4 22  20   M    M   8 18     30  20
 7  36  26  31   1  34   0 0.00  0.0    0  9.8 17 140   M    M   8        20 150
 8  37  32  35   5  30   0 0.20    T    0  9.2 16 280   M    M  10 14     21 300
 9  38  31  35   6  30   0    T  0.0    0 13.5 18 350   M    M  10 1      23 350
10  33  28  31   2  34   0    T    T    0 11.1 15 330   M    M  10        18 330
11  32  23  28  -1  37   0 0.00  0.0    0  8.9 15 250   M    M   5 18     17 260
12  37  23  30   2  35   0    T    T    0  9.3 16 320   M    M   8 1      19 310
13  47  35  41  13  24   0 0.00  0.0    0  7.9 18 260   M    M  10 18     24 260
14  50  45  48  20  17   0    T  0.0    0  8.2 14 180   M    M  10 1      19 180
15  46  42  44  16  21   0 0.06  0.0    0 11.4 17 140   M    M  10 1      24 130
16  45  29  37  10  28   0 0.02  0.0    0 12.0 24 300   M    M  10 12     32 310
17  29  24  27   0  38   0    T    T    0 11.2 20 290   M    M  10        24 290
18  28  19  24  -3  41   0 0.00  0.0    0  5.5 10 250   M    M   8        13 250
19  32  27  30   4  35   0    T    T    0  4.8 10 340   M    M  10 8      11 340
20  33  28  31   5  34   0    T    T    0  3.9 10 230   M    M  10 8      14 250
================================================================================
SM  734  553       651   0  0.28    T    182.5          M      175              
================================================================================
AV 36.7 27.6                               9.1 FASTST   M    M   9    MAX(MPH)  
                                 MISC ---->  # 24 300               # 32  310   
================================================================================
NOTES:
# LAST OF SEVERAL OCCURRENCES

COLUMN 17 PEAK WIND IN M.P.H.

PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6) , PAGE 2

                                          STATION:  CHICAGO-OHARE
                                          MONTH:    DECEMBER
                                          YEAR:     2014
                                          LATITUDE:   41 58 N                   
                                          LONGITUDE:  87 54 W                   

[TEMPERATURE DATA]      [PRECIPITATION DATA]       SYMBOLS USED IN COLUMN 16    

AVERAGE MONTHLY: 32.2   TOTAL FOR MONTH:   0.28    1 = FOG OR MIST              
DPTR FM NORMAL:   3.1   DPTR FM NORMAL:   -1.30    2 = FOG REDUCING VISIBILITY  
HIGHEST:    50 ON 14    GRTST 24HR  0.20 ON  8- 8      TO 1/4 MILE OR LESS      
LOWEST:     18 ON  2, 1                            3 = THUNDER                  
                        SNOW, ICE PELLETS, HAIL    4 = ICE PELLETS              
                        TOTAL MONTH:    T          5 = HAIL                     
                        GRTST 24HR    T  ON 20-20  6 = FREEZING RAIN OR DRIZZLE 
                        GRTST DEPTH:   0           7 = DUSTSTORM OR SANDSTORM:  
                                                       VSBY 1/2 MILE OR LESS    
                                                   8 = SMOKE OR HAZE            
[NO. OF DAYS WITH]      [WEATHER - DAYS WITH]      9 = BLOWING SNOW             
                                                   X = TORNADO                  
MAX 32 OR BELOW:   5    0.01 INCH OR MORE:   3                                  
MAX 90 OR ABOVE:   0    0.10 INCH OR MORE:   1                                  
MIN 32 OR BELOW:  17    0.50 INCH OR MORE:   0                                  
MIN  0 OR BELOW:   0    1.00 INCH OR MORE:   0                                  

[HDD (BASE 65) ]                                                                
TOTAL THIS MO.   651    CLEAR  (SCALE 0-3)   0                                  
DPTR FM NORMAL   -66    PTCLDY (SCALE 4-7)   6                                  
TOTAL FM JUL 1  2094    CLOUDY (SCALE 8-10) 14                                  
DPTR FM NORMAL   121                                                            

[CDD (BASE 65) ]                                                                
TOTAL THIS MO.     0                                                            
DPTR FM NORMAL     0    [PRESSURE DATA]                                         
TOTAL FM JAN 1   799    HIGHEST SLP M ON M                                      
DPTR FM NORMAL   -44    LOWEST  SLP 29.66 ON 16                                 

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