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

                                          STATION:   TRI CITIES
                                          MONTH:     MAY
                                          YEAR:      2004
                                          LATITUDE:   43 31 N                   
                                          LONGITUDE:  84  5 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  52  43  48  -4  17   0 0.52  0.0    0  7.2 15  20   M    M   9 1      22  10
 2  50  37  44  -8  21   0 0.25  0.0    0  9.8 16 360   M    M   9        20  10
 3  50  31  41 -12  24   0 0.00  0.0    0  8.2 14 280   M    M   5        17 280
 4  59  29  44  -9  21   0 0.24    M    0 10.9 35 230   M    M   5 13     40 230
 5  61  40  51  -3  14   0 0.00  0.0    0  9.5 17 350   M    M   2        22 350
 6  74  44  59   5   6   0    T    M    0  9.1 21 250   M    M   1        25 250
 7  58  45  52  -2  13   0 0.00  0.0    0  9.3 18  50   M    M   2        26  30
 8  58  39  49  -6  16   0 1.44  0.0    0  6.5 15 130   M    M   7 13      M  M 
 9  61  50  56   1   9   0 0.63  0.0    0  7.2 18  20   M    M   9 12     23  30
10  81  56  69  14   0   4 0.02  0.0    0 12.3 23 260   M    M   3 128    28 300
11  69  52  61   5   4   0    T  0.0    0  8.0 16  80   M    M   2        18  80
12  84  57  71  15   0   6 0.08  0.0    0 12.9 25 210   M    M   1 18     29 210
13  80  63  72  15   0   7 1.04  0.0    0  5.9 24 210   M    M   3 13     29 200
14  76  47  62   5   3   0 0.90  0.0    0 12.1 26 260   M    M   6 1238   31 260
15  54  42  48  -9  17   0 0.00  0.0    0  6.0 14 330   M    M   8        18 330
16  66  38  52  -6  13   0 0.00  0.0    0  5.5 13 170   M    M   0 1      17 200
17  77  50  64   6   1   0 0.01  0.0    0 11.4 30 200   M    M   3 3      36 190
18  68  50  59   1   6   0 0.28  0.0    0  8.9 25 270   M    M   5 1      29 270
19  69  46  58  -1   7   0 0.00  0.0    0  5.8 14 110   M    M   0 1      17  90
20  80  56  68   9   0   3 0.05  0.0    0 13.1 25 240   M    M   4 1      31 250
21  63  48  56  -4   9   0 0.48  0.0    0 11.3 21  90   M    M   8 13     26  70
22  69  49  59  -1   6   0 0.06  0.0    0  5.3 14 310   M    M   8 1      18 330
23  59  50  55  -5  10   0 1.41  0.0    0  9.9 20 340   M    M  10 13     25 330
24  58  48  53  -8  12   0 0.46  0.0    0 11.1 24 260   M    M  10 1      29 260
25  59  48  54  -7  11   0 0.03  0.0    0  6.3 13 220   M    M   9 1      14 220
26  66  50  58  -3   7   0 0.00  0.0    0  6.9 15 260   M    M   4 1      18 260
27  71  42  57  -5   8   0 0.01  0.0    0  9.9 25 260   M    M   2        30 250
28  62  45  54  -8  11   0 0.00  0.0    0  7.1 14  10   M    M   5        18 330
29  64  41  53  -9  12   0 0.00  0.0    0  5.8 13  90   M    M   2        15  80
30  71  52  62   0   3   0 0.01  0.0    0 11.3 22  90   M    M   4        36 100
31  73  56  65   2   0   0 0.22  0.0    0 13.3 26 270   M    M   6 1      35 220
================================================================================
SM 2042 1444       281  20  8.14     0.0 277.8          M      152              
================================================================================
AV 65.9 46.6                               9.0 FASTST  PSBL  %   5    MAX(MPH)  
                                 MISC ---->    35 230                 40  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:  TRI CITIES
                                          MONTH:    MAY
                                          YEAR:     2004
                                          LATITUDE:   43 31 N                   
                                          LONGITUDE:  84  5 W                   

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

AVERAGE MONTHLY: 56.2   TOTAL FOR MONTH:   8.14    1 = FOG                      
DPTR FM NORMAL:  -1.4   DPTR FM NORMAL:    5.25    2 = FOG REDUCING VISIBILITY  
HIGHEST:    84 ON 12    GRTST 24HR  1.81 ON  8- 9      TO 1/4 MILE OR LESS      
LOWEST:     29 ON  4                               3 = THUNDER                  
                        SNOW, ICE PELLETS, HAIL    4 = ICE PELLETS              
                        TOTAL MONTH:   0.0 INCH    5 = HAIL                     
                        GRTST 24HR     0.0         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:  20                                  
MAX 90 OR ABOVE:   0    0.10 INCH OR MORE:  12                                  
MIN 32 OR BELOW:   2    0.50 INCH OR MORE:   6                                  
MIN  0 OR BELOW:   0    1.00 INCH OR MORE:   3                                  

[HDD (BASE 65) ]                                                                
TOTAL THIS MO.   281    CLEAR  (SCALE 0-3)  12                                  
DPTR FM NORMAL     9    PTCLDY (SCALE 4-7)  10                                  
SEASONAL TOTAL  6897    CLOUDY (SCALE 8-10)  9                                  
DPTR FM NORMAL  -134                                                            

[CDD (BASE 65) ]                                                                
TOTAL THIS MO.    20                                                            
DPTR FM NORMAL   -22    [PRESSURE DATA]                                         
SEASONAL TOTAL    27    HIGHEST SLP 30.40 ON  7                                 
DPTR FM NORMAL   -16    LOWEST  SLP 29.39 ON 31                                 

[REMARKS]