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000
CXUS55 KLOT 131945
CF6ORD
PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6)

                                          STATION:   CHICAGO-OHARE IL
                                          MONTH:     MAY
                                          YEAR:      2009
                                          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  60  46  53   0  12   0 0.02  0.0    0  8.5 17 300   M    M   7        23 320
 2  66  44  55   1  10   0 0.00  0.0    0  9.2 22 260   M    M   6        30 250
 3  70  43  57   3   8   0 0.00  0.0    0  4.9 16 270   M    M   7        23 280
 4  70  43  57   3   8   0 0.00  0.0    0  7.6 17  90   M    M   8        23  90
 5  71  49  60   5   5   0 0.00  0.0    0  6.0 16 130   M    M   7        24 120
 6  75  51  63   8   2   0 0.67  0.0    0  8.1 17  10   M    M   9 13     23 340
 7  77  56  67  11   0   2 0.19  0.0    0 10.3 23 280   M    M   7 18     31 300
 8  77  53  65   9   0   0 0.02  0.0    0  6.0 17 220   M    M   8 13     22 220
 9  63  46  55  -1  10   0    T  0.0    0 11.8 33 310   M    M   8        48 300
10  67  40  54  -3  11   0 0.00  0.0    0  8.4 22  30   M    M   5        33  30
11  61  39  50  -7  15   0 0.00  0.0    0  4.6 13  70   M    M   6 8      22  80
12  71  39  55  -2  10   0 0.00  0.0    0  9.6 23 170   M    M   4        29 170
13  70  53  62   4   3   0 0.55  0.0    0 16.4 30 190   M    M  10 13     40 200
14  68  53  61   3   4   0 0.00  0.0    0 10.7 24 250   M    M   5        30 280
15  61  52  57  -1   8   0 0.39  0.0    0  8.8 28 180   M    M  10 13     36 180
16  62  45  54  -5  11   0    T  0.0    0 12.5 26 320   M    M   6 1      35 330
17  63  39  51  -8  14   0 0.00  0.0    0  6.2 15 100   M    M   2        20 100
18  66  40  53  -6  12   0    T  0.0    0  9.9 22 200   M    M   5        28 180
19  80  52  66   6   0   1 0.00  0.0    0 13.8 23 200   M    M   2        29 200
20  84  61  73  13   0   8 0.00  0.0    0 14.6 23 200   M    M   0        30 220
21  84  60  72  12   0   7 0.00  0.0    0 12.8 21  30   M    M   4        32  30
22  69  53  61   0   4   0 0.00  0.0    0 10.7 20  50   M    M   6        33  40
23  80  50  65   4   0   0 0.00  0.0    0  5.7 14  70   M    M   8         M  M
24  71  55  63   1   2   0 0.00  0.0    0 11.0 22  20   M    M   7 1      29  40
25  67  54  61  -1   4   0 0.04  0.0    0 10.8 20  70   M    M  10        31  60
26  74  53  64   2   1   0 1.73  0.0    0  7.8 13  40   M    M   7 13     25  60
27  73  55  64   1   1   0 0.02  0.0    0  7.2 16 250   M    M  10 18     22 230
28  62  54  58  -5   7   0 0.00  0.0    0  8.1 16 300   M    M   9        22 270
29  74  50  62  -1   3   0    T  0.0    0  6.9 18 340   M    M   3        24  10
30  79  50  65   1   0   0    T  0.0    0  6.8 18 340   M    M   6        24 340
31  73  45  59  -5   6   0 0.00  0.0    0  4.6 16  90   M    M   2        24  70
================================================================================
SM 2188 1523       171  18  3.63     0.0 280.3          M      194
================================================================================
AV 70.6 49.1                               9.0 FASTST   M    M   6    MAX(MPH)
                                 MISC ---->  # 33 310               # 48  300
================================================================================
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:     2009
                                          LATITUDE:   41 58 N
                                          LONGITUDE:  87 54 W

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

AVERAGE MONTHLY: 59.9   TOTAL FOR MONTH:   3.63    1 = FOG OR MIST
DPTR FM NORMAL:   1.2   DPTR FM NORMAL:    0.25    2 = FOG REDUCING VISIBILITY
HIGHEST:    84 ON 21,20 GRTST 24HR  1.74 ON 26-27      TO 1/4 MILE OR LESS
LOWEST:     39 ON 17,12                            3 = THUNDER
                        SNOW, ICE PELLETS, HAIL    4 = ICE PELLETS
                        TOTAL MONTH:   0.0 INCH    5 = HAIL
                        GRTST 24HR     0.0         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:   9
MAX 90 OR ABOVE:   0    0.10 INCH OR MORE:   5
MIN 32 OR BELOW:   0    0.50 INCH OR MORE:   3
MIN  0 OR BELOW:   0    1.00 INCH OR MORE:   1

[HDD (BASE 65) ]
TOTAL THIS MO.   171    CLEAR  (SCALE 0-3)   5
DPTR FM NORMAL   -61    PTCLDY (SCALE 4-7)  18
TOTAL FM JUL 1  6525    CLOUDY (SCALE 8-10)  8
DPTR FM NORMAL    76

[CDD (BASE 65) ]
TOTAL THIS MO.    18
DPTR FM NORMAL   -30    [PRESSURE DATA]
TOTAL FM JAN 1    20    HIGHEST SLP 30.39 ON 17
DPTR FM NORMAL   -38    LOWEST  SLP 29.54 ON  9

[REMARKS]
#FINAL-05-09#