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:     MAY
                                          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  44  33  39 -12  26   0    T    T    0 16.3 28 300   M    M   8 1      31 300
 2  41  27  34 -18  31   0    T    T    0 12.2 24 330   M    M   7 1      28 330
 3  52  24  38 -14  27   0 0.00  0.0    0  9.1 17 300   M    M   0 8      32 330
 4  66  28  47  -6  18   0 0.00  0.0    0 10.6 20 270   M    M   0        26 230
 5  75  47  61   8   4   0 0.09  0.0    0 17.6 17 200   M    M   2 3      23 270
 6  74  51  63  10   2   0 0.01  0.0    0  9.4 18 270   M    M   1 1      22 220
 7  73  52  63   9   2   0 0.17  0.0    0 15.0 23 150   M    M   4 18     28 140
 8  77  59  68  14   0   3 0.13  0.0    0 16.8 26 170   M    M   5 1      36 160
 9  71  58  65  11   0   0    T  0.0    0 19.5 29 230   M    M   7 18     35 240
10  67  55  61   6   4   0 0.02  0.0    0 11.4 23 280   M    M   7 3      26 260
11  56  50  53  -2  12   0 0.01  0.0    0 15.4 24  40   M    M   9 18     28  50
12  50  34  42 -14  23   0 0.96  0.0    0 18.7 31 120   M    M  10 1      36 120
13  55  42  49  -7  16   0 0.02  0.0    0 10.4 20 290   M    M  10 18     22 290
14  50  39  45 -11  20   0 0.06  0.0    0 17.2 31 300   M    M   8 1      37 300
15  51  38  45 -12  20   0 0.00  0.0    0 12.1 22 340   M    M  10        25 320
16  58  36  47 -10  18   0 0.01  0.0    0 12.3 17 190   M    M   5         M  M 
17  69  49  59   2   6   0    T  0.0    0 15.3 23 130   M    M   2        30 140
18  63  56  60   2   5   0 1.56  0.0    0 14.8 30 160   M    M   8 18     37 160
19  70  55  63   5   2   0    T  0.0    0 12.0 20  10   M    M   8 18     24  10
20  64  51  58   0   7   0 0.00  0.0    0  7.4 16  70   M    M   8 18     22  70
21  66  50  58  -1   7   0 0.18  0.0    0 12.6 32 190   M    M   4 18     39 180
22  73  54  64   5   1   0 0.00  0.0    0 18.4 32 300   M    M   2 1      39 300
23  70  51  61   2   4   0 0.00  0.0    0 11.7 21  10   M    M   1        25  20
24  73  50  62   2   3   0 0.00  0.0    0  6.0 13 130   M    M   1 18     15 140
25  68  50  59  -1   6   0 0.16  0.0    0 13.2 29 200   M    M   5 1      33 200
26  69  47  58  -3   7   0 0.02  0.0    0 14.3 46 270   M    M   2 3      55 270
27  61  44  53  -8  12   0 0.14  0.0    0 12.2 28 300   M    M   4 8      31 290
28  64  44  54  -7  11   0    T  0.0    0  7.1 15 200   M    M   6        17 280
29  67  47  57  -5   8   0 0.00  0.0    0  7.3 15 310   M    M   3 8      18 320
30  74  45  60  -2   5   0 0.00  0.0    0  5.2 13  30   M    M   0        17  30
31  78  53  66   4   0   1 0.00  0.0    0  7.0 17 170   M    M   2        22 140
================================================================================
SM 1989 1419       307   4  3.54    T    388.5          M      149              
================================================================================
AV 64.2 45.8                              12.5 FASTST  PSBL  %   5    MAX(MPH)  
                                 MISC ---->    46 270                 55  270   
================================================================================
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:    MAY
                                          YEAR:     2005
                                          LATITUDE:   43 55 N                   
                                          LONGITUDE:  92 30 W                   

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

AVERAGE MONTHLY: 55.0   TOTAL FOR MONTH:   3.54    1 = FOG                      
DPTR FM NORMAL:  -1.9   DPTR FM NORMAL:    0.01    2 = FOG REDUCING VISIBILITY  
HIGHEST:    78 ON 31    GRTST 24HR  1.56 ON 18-18      TO 1/4 MILE OR LESS      
LOWEST:     24 ON  3                               3 = THUNDER                  
                        SNOW, ICE PELLETS, HAIL    4 = ICE PELLETS              
                        TOTAL MONTH:    T          5 = HAIL                     
                        GRTST 24HR    T  ON  2- 2  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:  15                                  
MAX 90 OR ABOVE:   0    0.10 INCH OR MORE:   7                                  
MIN 32 OR BELOW:   3    0.50 INCH OR MORE:   2                                  
MIN  0 OR BELOW:   0    1.00 INCH OR MORE:   1                                  

[HDD (BASE 65) ]                                                                
TOTAL THIS MO.   307    CLEAR  (SCALE 0-3)  12                                  
DPTR FM NORMAL    26    PTCLDY (SCALE 4-7)  10                                  
SEASONAL TOTAL  7430    CLOUDY (SCALE 8-10)  9                                  
DPTR FM NORMAL  -813                                                            

[CDD (BASE 65) ]                                                                
TOTAL THIS MO.     4                                                            
DPTR FM NORMAL   -26    [PRESSURE DATA]                                         
SEASONAL TOTAL     6    HIGHEST SLP 30.33 ON 12                                 
DPTR FM NORMAL   -25    LOWEST  SLP 29.60 ON  9                                 

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