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000
CXUS55 KLOT 012338
CF6ORD
PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6)

                                          STATION:   CHICAGO-OHARE IL
                                          MONTH:     MAY
                                          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  63  47  55   2  10   0 0.00  0.0    0 11.9 28 290   M    M   7        36 240
 2  59  42  51  -3  14   0 0.00  0.0    0  9.9 17  60   M    M   8        32  60
 3  50  37  44 -10  21   0    T  0.0    0  7.6 15  40   M    M   8        25  30
 4  59  37  48  -6  17   0 0.00  0.0    0  7.6 16  20   M    M   7        28  50
 5  63  35  49  -6  16   0 0.06  0.0    0 11.5 23 190   M    M   7 1      29 200
 6  68  44  56   1   9   0    T  0.0    0  7.8 21 290   M    M   5 1      28 290
 7  60  43  52  -4  13   0    T  0.0    0  6.9 15  70   M    M   9 1      23  50
 8  68  39  54  -2  11   0 0.00  0.0    0  7.2 15  60   M    M   4        32  60
 9  73  47  60   4   5   0    T  0.0    0 14.7 26 110   M    M   8        32 120
10  90  62  76  19   0  11 0.00  0.0    0  8.6 21 160   M    M   6        25  70
11  87  63  75  18   0  10 0.13  0.0    0  6.6 24 310   M    M   5 138    29 310
12  86  58  72  15   0   7 0.29  0.0    0  8.1 22 280   M    M   8 138    31 260
13  77  47  62   4   3   0 0.02  0.0    0 11.0 28  20   M    M   9 1      37  20
14  53  45  49  -9  16   0 0.31  0.0    0 16.9 28  20   M    M  10 1      38  40
15  46  41  44 -14  21   0 0.31  0.0    0 21.4 31  20   M    M  10 1      39  30
16  52  37  45 -14  20   0 0.00  0.0    0 13.9 26  40   M    M   1        36  40
17  60  40  50  -9  15   0 0.00  0.0    0 12.7 24  20   M    M   6        33  40
18  57  49  53  -6  12   0 0.07  0.0    0  7.1 13  60   M    M  10 1      23  50
19  72  49  61   1   4   0 0.00  0.0    0  5.8 14  60   M    M   8 18     28  60
20  73  50  62   2   3   0 0.00  0.0    0  6.0 13  50   M    M   6 18     24  60
21  75  50  63   3   2   0 0.01  0.0    0  8.1 17 160   M    M   8 18     22 160
22  87  61  74  13   0   9 0.58    T    0 11.4 29 300   M    M   5 135    36 300
23  79  60  70   9   0   5    T  0.0    0 11.3 24 260   M    M   7 18     33 240
24  66  47  57  -5   8   0 0.11  0.0    0 12.4 20  50   M    M   6 13     31  40
25  67  47  57  -5   8   0 2.24  0.0    0 11.7 28  20   M    M  10 123    36  10
26  49  43  46 -16  19   0 1.06  0.0    0 17.8 26  10   M    M   9 1      39  30
27  58  40  49 -14  16   0    T  0.0    0  8.7 17  50   M    M   7        26  60
28  62  51  57  -6   8   0 0.12  0.0    0  6.7 17 180   M    M   9 12     23 180
29  70  52  61  -2   4   0 1.88  0.0    0  5.7 23 280   M    M  10 123    30 270
30  88  56  72   8   0   7 0.00  0.0    0 12.8 26 180   M    M   3 1      36 190
31  85  69  77  13   0  12 0.08  0.0    0 13.2 25 210   M    M   5 3      33 240
================================================================================
SM 2102 1488       275  61  7.27    T    323.0          M      221
================================================================================
AV 67.8 48.0                              10.4 FASTST   M    M   7    MAX(MPH)
                                 MISC ---->  # 31  20               # 39   30
================================================================================
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:    MAY
                                          YEAR:     2011
                                          LATITUDE:   41 58 N
                                          LONGITUDE:  87 54 W

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

AVERAGE MONTHLY: 57.9   TOTAL FOR MONTH:   7.27    1 = FOG OR MIST
DPTR FM NORMAL:  -0.8   DPTR FM NORMAL:    3.89    2 = FOG REDUCING VISIBILITY
HIGHEST:    90 ON 10    GRTST 24HR  3.18 ON 25-26      TO 1/4 MILE OR LESS
LOWEST:     35 ON  5                               3 = THUNDER
                        SNOW, ICE PELLETS, HAIL    4 = ICE PELLETS
                        TOTAL MONTH:    T          5 = HAIL
                        GRTST 24HR    T  ON 22-22  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:   0    0.01 INCH OR MORE:  15
MAX 90 OR ABOVE:   1    0.10 INCH OR MORE:  10
MIN 32 OR BELOW:   0    0.50 INCH OR MORE:   4
MIN  0 OR BELOW:   0    1.00 INCH OR MORE:   3

[HDD (BASE 65) ]
TOTAL THIS MO.   275    CLEAR  (SCALE 0-3)   2
DPTR FM NORMAL    43    PTCLDY (SCALE 4-7)  17
TOTAL FM JUL 1  6485    CLOUDY (SCALE 8-10) 12
DPTR FM NORMAL    36

[CDD (BASE 65) ]
TOTAL THIS MO.    61
DPTR FM NORMAL    13    [PRESSURE DATA]
TOTAL FM JAN 1    66    HIGHEST SLP 30.42 ON  4
DPTR FM NORMAL     8    LOWEST  SLP 29.54 ON 23

[REMARKS]
#FINAL-05-11#