Explanation of the Preliminary Monthly Climate Data (F6) Product

These data are preliminary and have not undergone final quality control by the National Climatic Data Center (NCDC). Therefore, these data are subject to revision. Final and certified climate data can be accessed at the NCDC - http://www.ncdc.noaa.gov.

WFO Monthly/Daily Climate Data

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

                                          STATION:   ROCHESTER
                                          MONTH:     APRIL
                                          YEAR:      2005
                                          LATITUDE:   43 55 N                   
                                          LONGITUDE:  92 30 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  48  33  41   3  24   0 0.05  0.1    0 13.3 29 310   M    M   3 1      32 320
 2  53  29  41   2  24   0 0.00  0.0    0  4.6 10 280   M    M   0        13 240
 3  66  33  50  11  15   0 0.00  0.0    0  6.5 14 130   M    M   1        15 130
 4  74  43  59  19   6   0 0.00  0.0    0 15.5 28 150   M    M   0        33 160
 5  69  51  60  20   5   0 0.00  0.0    0 11.0 18 170   M    M   5 8      23 180
 6  62  43  53  13  12   0    T  0.0    0 12.8 26  10   M    M   4 18     32  10
 7  62  40  51  10  14   0 0.00  0.0    0  9.6 20  30   M    M   4 1      22  40
 8  67  34  51  10  14   0 0.00  0.0    0 11.5 22 150   M    M   0        25 140
 9  73  43  58  16   7   0 0.00  0.0    0 17.7 30 160   M    M   0        37 150
10  75  54  65  23   0   0    T  0.0    0 13.7 20 110   M    M   3        23 120
11  69  52  61  18   4   0 0.44  0.0    0 17.2 29 140   M    M   6 18     32 130
12  53  42  48   5  17   0 0.17  0.0    0 16.6 26 100   M    M  10 18     35  90
13  59  36  48   4  17   0 0.00  0.0    0  9.0 20  80   M    M   0        25  70
14  66  37  52   8  13   0 0.00  0.0    0  8.7 17 150   M    M   0        23 140
15  70  39  55  10  10   0 0.00  0.0    0 10.3 18 170   M    M   1        23 200
16  56  49  53   8  12   0 0.45  0.0    0  8.0 17 100   M    M   9 138    21  90
17  73  43  58  13   7   0 0.00  0.0    0  9.2 14 160   M    M   1 18     17 150
18  79  54  67  21   0   2    T  0.0    0 13.7 25 190   M    M   0 8      32 190
19  65  54  60  14   5   0 0.46  0.0    0 10.2 20 150   M    M   7 128    23 150
20  57  48  53   6  12   0 0.00  0.0    0 10.7 22  20   M    M   9 12     25  20
21  61  41  51   4  14   0 0.00  0.0    0  9.0 16  60   M    M   2 1      18 140
22  63  35  49   1  16   0 0.01  0.0    0 15.8 30  10   M    M   4        40  10
23  46  29  38 -10  27   0 0.00  0.0    0 15.8 31 350   M    M   0        39 340
24  56  29  43  -5  22   0 0.00  0.0    0 15.4 26 350   M    M   0        36  10
25  52  39  46  -3  19   0 0.13  0.0    0 12.5 23 310   M    M   7 1      31 260
26  47  35  41  -8  24   0 0.03    T    0 14.6 26 340   M    M   9 14     32 320
27  46  30  38 -12  27   0 0.00  0.0    0 15.6 28 330   M    M   5        32 320
28  50  27  39 -11  26   0 0.00  0.0    0  9.1 14 290   M    M   4        18 260
29  51  32  42  -9  23   0 0.00  0.0    0  6.6 20 260   M    M   4        23 280
30  48  30  39 -12  26   0 0.03    T    0 10.7 24 310   M    M   6 8      29 320
================================================================================
SM 1816 1184       442   2  1.77     0.1 354.9          M      104              
================================================================================
AV 60.5 39.5                              11.8 FASTST  PSBL  %   3    MAX(MPH)  
                                 MISC ---->    31 350                 40   10   
================================================================================
NOTES:
# LAST OF SEVERAL OCCURRENCES

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

                                          STATION:  ROCHESTER
                                          MONTH:    APRIL
                                          YEAR:     2005
                                          LATITUDE:   43 55 N                   
                                          LONGITUDE:  92 30 W                   

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

AVERAGE MONTHLY: 50.0   TOTAL FOR MONTH:   1.77    1 = FOG                      
DPTR FM NORMAL:   5.3   DPTR FM NORMAL:   -1.24    2 = FOG REDUCING VISIBILITY  
HIGHEST:    79 ON 18    GRTST 24HR  0.61 ON 11-12      TO 1/4 MILE OR LESS      
LOWEST:     27 ON 28                               3 = THUNDER                  
                        SNOW, ICE PELLETS, HAIL    4 = ICE PELLETS              
                        TOTAL MONTH:   0.1 INCH    5 = HAIL                     
                        GRTST 24HR   0.1 ON  1- 1  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:   9                                  
MAX 90 OR ABOVE:   0    0.10 INCH OR MORE:   5                                  
MIN 32 OR BELOW:   7    0.50 INCH OR MORE:   0                                  
MIN  0 OR BELOW:   0    1.00 INCH OR MORE:   0                                  

[HDD (BASE 65) ]                                                                
TOTAL THIS MO.   442    CLEAR  (SCALE 0-3)  15                                  
DPTR FM NORMAL  -167    PTCLDY (SCALE 4-7)  11                                  
SEASONAL TOTAL  7123    CLOUDY (SCALE 8-10)  4                                  
DPTR FM NORMAL  -839                                                            

[CDD (BASE 65) ]                                                                
TOTAL THIS MO.     2                                                            
DPTR FM NORMAL     1    [PRESSURE DATA]                                         
SEASONAL TOTAL     2    HIGHEST SLP 30.36 ON 15                                 
DPTR FM NORMAL     1    LOWEST  SLP 29.43 ON 26                                 

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