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

                                          STATION:   CHICAGO-OHARE IL
                                          MONTH:     APRIL
                                          YEAR:      2010
                                          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  83  54  69  26   0   4 0.00  0.0    0 15.3 30 190   M    M   8        39 190
 2  81  59  70  27   0   5 0.00  0.0    0 17.6 36 190   M    M   9        48 190
 3  59  49  54  11  11   0 0.18  0.0    0 11.9 24 270   M    M   8 18     31 270
 4  76  39  58  14   7   0 0.80  0.0    0 13.7 35 200   M    M   8 138    45 200
 5  72  50  61  17   4   0 0.82  0.0    0  8.5 47 310   M    M   7 138    68 320
 6  76  47  62  18   3   0 0.37  0.0    0  8.7 25 220   M    M   9 138    31 230
 7  49  37  43  -2  22   0 0.13  0.0    0 11.4 24  20   M    M  10 1      28  20
 8  40  34  37  -8  28   0    T    T    0 11.6 22 310   M    M   9 1      29 350
 9  56  30  43  -3  22   0 0.00  0.0    0  7.7 20 320   M    M   1         M  M
10  74  38  56  10   9   0 0.00  0.0    0 11.5 26 220   M    M   4        35 210
11  63  44  54   8  11   0 0.00  0.0    0  8.1 16  60   M    M   8         M  M
12  70  44  57  10   8   0 0.01  0.0    0 11.3 20 100   M    M   8        28  50
13  63  48  56   9   9   0 0.00  0.0    0 12.1 18 120   M    M   6        28  70
14  80  46  63  16   2   0 0.00  0.0    0  8.4 17 110   M    M   7 8      22 160
15  82  61  72  24   0   7 0.00  0.0    0 12.7 24 240   M    M   6 8      33 250
16  68  39  54   6  11   0 0.00  0.0    0 12.9 25 330   M    M   6        35 320
17  59  37  48   0  17   0 0.00  0.0    0 11.5 25 320   M    M   1        31 330
18  52  36  44  -5  21   0 0.00  0.0    0  8.4 16  40   M    M   2        32  50
19  56  35  46  -3  19   0 0.00  0.0    0  6.2 14  50   M    M   8        26  40
20  64  38  51   2  14   0 0.00  0.0    0  3.7 14  70   M    M   8        23  60
21  62  41  52   2  13   0    T  0.0    0 10.4 21  40   M    M   5        29  50
22  60  38  49  -1  16   0 0.00  0.0    0  7.1 13  70   M    M   5        23  50
23  63  41  52   2  13   0 0.07  0.0    0  7.9 20 110   M    M   9 1      24 110
24  60  51  56   5   9   0 0.26  0.0    0 12.1 26 100   M    M   9 18     31  90
25  60  47  54   3  11   0 0.31  0.0    0 13.5 23  30   M    M  10 18     30  40
26  63  47  55   4  10   0 0.00  0.0    0 14.7 22  20   M    M   7        36  40
27  51  37  44  -8  21   0 0.00  0.0    0 12.1 23  40   M    M   4        31  40
28  64  33  49  -3  16   0 0.00  0.0    0  4.7 16 100   M    M   4        21  80
29  79  46  63  10   2   0 0.00  0.0    0 18.4 37 180   M    M   6 8      49 190
30  81  62  72  19   0   7 0.06  0.0    0 18.0 31 190   M    M   6 38     39 190
================================================================================
SM 1966 1308       329  23  3.01    T    332.1          M      198
================================================================================
AV 65.5 43.6                              11.1 FASTST   M    M   7    MAX(MPH)
                                 MISC ---->  # 47 310               # 68  320
================================================================================
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:     2010
                                          LATITUDE:   41 58 N
                                          LONGITUDE:  87 54 W

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

AVERAGE MONTHLY: 54.6   TOTAL FOR MONTH:   3.01    1 = FOG OR MIST
DPTR FM NORMAL:   6.8   DPTR FM NORMAL:   -0.67    2 = FOG REDUCING VISIBILITY
HIGHEST:    83 ON  1    GRTST 24HR  1.19 ON  5- 6      TO 1/4 MILE OR LESS
LOWEST:     30 ON  9                               3 = THUNDER
                        SNOW, ICE PELLETS, HAIL    4 = ICE PELLETS
                        TOTAL MONTH:    T          5 = HAIL
                        GRTST 24HR    T  ON  8- 8  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:  10
MAX 90 OR ABOVE:   0    0.10 INCH OR MORE:   7
MIN 32 OR BELOW:   1    0.50 INCH OR MORE:   2
MIN  0 OR BELOW:   0    1.00 INCH OR MORE:   0

[HDD (BASE 65) ]
TOTAL THIS MO.   329    CLEAR  (SCALE 0-3)   3
DPTR FM NORMAL  -184    PTCLDY (SCALE 4-7)  18
TOTAL FM JUL 1  5780    CLOUDY (SCALE 8-10)  9
DPTR FM NORMAL  -437

[CDD (BASE 65) ]
TOTAL THIS MO.    23
DPTR FM NORMAL    14    [PRESSURE DATA]
TOTAL FM JAN 1    23    HIGHEST SLP M ON M
DPTR FM NORMAL    13    LOWEST  SLP 29.22 ON 25

[REMARKS]
#FINAL-04-10#