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

                                          STATION:   DETROIT
                                          MONTH:     APRIL
                                          YEAR:      2004
                                          LATITUDE:   42 13 N                   
                                          LONGITUDE:  83 20 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
                                          AVG MX 2MIN
DY MAX MIN AVG DEP HDD CDD  WTR  SNW DPTH SPD SPD DIR MIN PSBL S-S WX    SPD DR
================================================================================

 1  50  35  43   0  22   0 0.06    T    0 16.2 24 360   M    M  10        31 360
 2  56  40  48   5  17   0    T  0.0    0 11.7 18 360   M    M   8 1      23 360
 3  58  36  47   4  18   0 0.03  0.0    0 12.9 27 300   M    M   7        35 300
 4  45  31  38  -6  27   0    T    T    0 16.9 23 310   M    M   6        35 330
 5  47  24  36  -8  29   0 0.00  0.0    0  8.1 15 300   M    M   0        20 300
 6  59  30  45   1  20   0    T  0.0    0  8.5 25 230   M    M   6        31 230
 7  57  39  48   3  17   0 0.00  0.0    0  6.3 10 140   M    M   4 18      M  M 
 8  53  37  45   0  20   0    T  0.0    0  8.4 20 140   M    M   8 18     24 120
 9  55  35  45  -1  20   0 0.00  0.0    0  6.7 20 330   M    M   5        24 330
10  53  35  44  -2  21   0    T  0.0    0  6.2 14 140   M    M   6        17 140
11  48  35  42  -4  23   0    T  0.0    0  9.3 13  80   M    M   8        18  50
12  52  33  43  -4  22   0 0.07    T    0 13.0 22  20   M    M   7 1      26  40
13  49  35  42  -5  23   0    T  0.0    0 13.8 22  10   M    M  10 1      30  10
14  60  34  47   0  18   0 0.00  0.0    0  8.6 16 360   M    M   2        22 300
15  59  41  50   2  15   0 0.00  0.0    0  6.3 14 170   M    M   4        17 110
16  78  45  62  14   3   0 0.00  0.0    0 10.5 22 220   M    M   5        27 200
17  77  55  66  17   0   1    T  0.0    0  8.3 14 240   M    M   6         M  M 
18  86  55  71  22   0   6 0.00  0.0    0 14.6 31 220   M    M   6 18     39 210
19  80  48  64  15   1   0    T  0.0    0 22.8 37 240   M    M   6        44 230
20  51  44  48  -2  17   0 0.05  0.0    0  8.4 14  70   M    M   8 3      17 100
21  72  48  60  10   5   0 0.34  0.0    0 15.5 33 220   M    M   9 13     41 220
22  58  43  51   0  14   0 0.00  0.0    0  9.4 21 290   M    M   8        26 300
23  65  43  54   3  11   0 0.00  0.0    0  7.1 15 170   M    M   6        18 170
24  58  43  51   0  14   0 0.01  0.0    0  8.2 16  60   M    M   6        21  60
25  74  46  60   8   5   0 0.13  0.0    0 13.3 36 220   M    M   9 1      39 230
26  66  44  55   3  10   0    T  0.0    0 14.9 23 280   M    M   6        32 250
27  44  35  40 -13  25   0    T    T    0 12.1 25 300   M    M   7        30 300
28  72  29  51  -2  14   0    T  0.0    0 16.1 30 210   M    M   5        36 200
29  81  59  70  17   0   5 0.00  0.0    0 19.2 32 220   M    M   6        41 230
30  72  58  65  11   0   0    T  0.0    0 10.6 24 180   M    M   8 18     29 180
================================================================================
SM 1835 1215       431  12  0.69    T    343.9          M      192              
================================================================================
AV 61.2 40.5                              11.5 FASTST  PSBL  %   6    MAX(MPH)  
                                 MISC ---->    37 240                 44  230   
================================================================================
NOTES:
# LAST OF SEVERAL OCCURRENCES

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

                                          STATION:  DETROIT
                                          MONTH:    APRIL
                                          YEAR:     2004
                                          LATITUDE:   42 13 N                   
                                          LONGITUDE:  83 20 W                   

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

AVERAGE MONTHLY: 50.8   TOTAL FOR MONTH:   0.69    1 = FOG                      
DPTR FM NORMAL:   2.7   DPTR FM NORMAL:   -2.36    2 = FOG REDUCING VISIBILITY  
HIGHEST:    86 ON 18    GRTST 24HR  0.34 ON 21-21      TO 1/4 MILE OR LESS      
LOWEST:     24 ON  5                               3 = THUNDER                  
                        SNOW, ICE PELLETS, HAIL    4 = ICE PELLETS              
                        TOTAL MONTH:    T          5 = HAIL                     
                        GRTST 24HR    T  ON 27-27  6 = GLAZE OR RIME            
                        GRTST DEPTH:   0           7 = BLOWING DUST OR SAND:    
                                                       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:   7                                  
MAX 90 OR ABOVE:   0    0.10 INCH OR MORE:   2                                  
MIN 32 OR BELOW:   4    0.50 INCH OR MORE:   0                                  
MIN  0 OR BELOW:   0    1.00 INCH OR MORE:   0                                  

[HDD (BASE 65) ]                                                                
TOTAL THIS MO.   431    CLEAR  (SCALE 0-3)   2                                  
DPTR FM NORMAL   -96    PTCLDY (SCALE 4-7)  18                                  
SEASONAL TOTAL  5752    CLOUDY (SCALE 8-10) 10                                  
DPTR FM NORMAL  -405                                                            

[CDD (BASE 65) ]                                                                
TOTAL THIS MO.    12                                                            
DPTR FM NORMAL     6    [PRESSURE DATA]                                         
SEASONAL TOTAL    12    HIGHEST SLP 30.34 ON 24                                 
DPTR FM NORMAL     6    LOWEST  SLP 29.58 ON  8                                 

[REMARKS]