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000
CXUS55 KLOT 010700
CF6ORD
PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6)

                                          STATION:   CHICAGO-OHARE IL
                                          MONTH:     APRIL
                                          YEAR:      2011
                                          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  45  28  37  -6  28   0 0.18  0.0    0  6.8 17 340   M    M   9 18     23 350
 2  54  36  45   2  20   0 0.00  0.0    0 10.0 22 290   M    M   6        26 300
 3  72  35  54  11  11   0 0.13  0.0    0 14.7 32 210   M    M   9 3      40 210
 4  68  40  54  10  11   0 0.11  0.0    0 16.6 33 220   M    M   9 13     43 220
 5  53  33  43  -1  22   0 0.00  0.0    0 12.4 22 190   M    M   6        25 280
 6  59  42  51   7  14   0    T  0.0    0  7.1 15 200   M    M   9 18     15 200
 7  46  39  43  -2  22   0 0.25  0.0    0  8.7 17  90   M    M  10 18     28  60
 8  45  40  43  -2  22   0 0.51  0.0    0  8.9 17  60   M    M  10 1      24  50
 9  66  44  55   9  10   0 0.00  0.0    0  7.1 15 120   M    M   7 18     23  70
10  83  56  70  24   0   5    T  0.0    0 18.9 31 210   M    M   6 1      40 210
11  67  44  56  10   9   0 0.00  0.0    0 13.6 25 280   M    M   7        33  30
12  58  40  49   2  16   0 0.00  0.0    0  9.4 17  20   M    M   2 8      28  30
13  68  36  52   5  13   0 0.00  0.0    0  3.5 14  90   M    M   6        16 110
14  53  40  47   0  18   0    T  0.0    0 17.4 25  30   M    M   9        37  30
15  51  37  44  -4  21   0 0.34  0.0    0 18.3 26  70   M    M  10 138    38  60
16  49  35  42  -6  23   0 0.20    T    0 14.0 26 280   M    M  10 1      36 300
17  53  35  44  -4  21   0 0.08  0.0    0 13.8 28 290   M    M   8        35 270
18  41  32  37 -12  28   0 0.49  0.6    1 13.6 20  40   M    M   9 14     33  50
19  38  34  36 -13  29   0 0.95  0.0    0 17.8 26  30   M    M  10 135    36  20
20  43  32  38 -11  27   0 0.01  0.0    0 11.6 21 280   M    M   8 1      28 280
21  50  32  41  -9  24   0 0.03  0.0    0  8.1 17  70   M    M   6        32  60
22  46  39  43  -7  22   0 0.56  0.0    0 12.0 25 120   M    M   9 13     30 120
23  64  45  55   5  10   0 0.00  0.0    0 11.4 28 260   M    M   8 1      36 250
24  56  45  51   0  14   0 0.00  0.0    0  7.1 14  50   M    M   9        25  70
25  54  45  50  -1  15   0 0.34  0.0    0 10.4 22 100   M    M  10 1      29  50
26  68  47  58   7   7   0 0.38  0.0    0 16.4 31 230   M    M   9 1      41 210
27  55  43  49  -3  16   0 0.31  0.0    0  7.2 18 300   M    M  10 1      23 300
28  45  40  43  -9  22   0 0.03    M    0 12.6 22 260   M    M  10 1      30 270
29  62  36  49  -4  16   0 0.00  0.0    0  6.9 16 100   M    M   4        21 100
30  71  48  60   7   5   0 0.00  0.0    0 18.5 31 170   M    M   9 8      41 150
================================================================================
SM 1683 1178       516   5  4.90     0.6 354.8          M      244
================================================================================
AV 56.1 39.3                              11.8 FASTST   M    M   8    MAX(MPH)
                                 MISC ---->  # 33 220               # 43  220
================================================================================
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 IL
                                          MONTH:    APRIL
                                          YEAR:     2011
                                          LATITUDE:   41 58 N
                                          LONGITUDE:  87 54 W

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

AVERAGE MONTHLY: 47.7   TOTAL FOR MONTH:   4.90    1 = FOG OR MIST
DPTR FM NORMAL:  -0.1   DPTR FM NORMAL:    1.22    2 = FOG REDUCING VISIBILITY
HIGHEST:    83 ON 10    GRTST 24HR  0.96 ON 19-20      TO 1/4 MILE OR LESS
LOWEST:     28 ON  1                               3 = THUNDER
                        SNOW, ICE PELLETS, HAIL    4 = ICE PELLETS
                        TOTAL MONTH:   0.6 INCH    5 = HAIL
                        GRTST 24HR   0.6 ON   M    6 = FREEZING RAIN OR DRIZZLE
                        GRTST DEPTH:   1 ON 18     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:   0    0.01 INCH OR MORE:  17
MAX 90 OR ABOVE:   0    0.10 INCH OR MORE:  13
MIN 32 OR BELOW:   4    0.50 INCH OR MORE:   3
MIN  0 OR BELOW:   0    1.00 INCH OR MORE:   0

[HDD (BASE 65) ]
TOTAL THIS MO.   516    CLEAR  (SCALE 0-3)   1
DPTR FM NORMAL     3    PTCLDY (SCALE 4-7)  11
TOTAL FM JUL 1  6210    CLOUDY (SCALE 8-10) 18
DPTR FM NORMAL    -7

[CDD (BASE 65) ]
TOTAL THIS MO.     5
DPTR FM NORMAL    -4    [PRESSURE DATA]
TOTAL FM JAN 1     5    HIGHEST SLP M ON M
DPTR FM NORMAL    -5    LOWEST  SLP 29.14 ON  3

[REMARKS]
#FINAL-04-11#