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


000
CXUS53 KDLH 011852
CF6DLH
PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6)

                                          STATION:   DULUTH MN
                                          MONTH:     APRIL
                                          YEAR:      2009
                                          LATITUDE:   46 49 N
                                          LONGITUDE:  92 11 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  36  30  33   1  32   0 0.17  1.2    6 10.7 22 260   M    M  10 128    28 270
 2  35  29  32  -1  33   0    T    T    5  9.5 14 270   M    M  10        18 290
 3  37  30  34   1  31   0 0.00  0.0    3  6.5 12 310   M    M   9        14 290
 4  39  23  31  -3  34   0 0.00  0.0    2  6.5 25 220   M    M   8        29 220
 5  38  28  33  -1  32   0 0.00  0.0    2  9.6 18 340   M    M   4        24  10
 6  39  22  31  -4  34   0 0.00  0.0    2 13.5 24 340   M    M   1        30 330
 7  46  23  35   0  30   0 0.00  0.0    1 10.7 18 300   M    M   1        24 340
 8  48  27  38   2  27   0 0.00  0.0    T 10.5 18 310   M    M   2        31 300
 9  45  27  36   0  29   0 0.00  0.0    T  8.0 16 330   M    M   1        24 330
10  44  26  35  -1  30   0 0.00  0.0    0  5.7 13 140   M    M   0        16 140
11  49  22  36  -1  29   0 0.00  0.0    0  5.4 14  90   M    M   0        17 110
12  52  28  40   3  25   0 0.00  0.0    0  9.0 15 120   M    M   0        17 120
13  50  32  41   3  24   0 0.00  0.0    0  9.5 20  90   M    M   3        24  90
14  50  31  41   3  24   0 0.00  0.0    0  9.2 15 100   M    M   3        18  90
15  56  32  44   5  21   0 0.00  0.0    0  8.9 17  90   M    M   0        22  80
16  65  33  49  10  16   0 0.00  0.0    0  7.5 15 160   M    M   0        20 150
17  73  44  59  19   6   0 0.00  0.0    0  9.8 21 240   M    M   4        28 210
18  50  34  42   2  23   0 0.00  0.0    0 11.2 22  90   M    M   9 1      28  80
19  37  30  34  -7  31   0 0.05    T    0  8.0 15  70   M    M  10 1      18  70
20  41  30  36  -5  29   0    T  0.0    0 12.4 24 350   M    M  10 1      35 350
21  56  35  46   4  19   0    T  0.0    0 16.3 30 350   M    M   5        39 340
22  51  32  42   0  23   0 0.00  0.0    0  9.8 18 340   M    M   2        24 340
23  64  36  50   8  15   0    T  0.0    0 13.2 25 180   M    M   2 3      35 190
24  63  36  50   7  15   0 0.04  0.0    0 11.4 23 200   M    M   6        32 200
25  50  33  42  -1  23   0    T  0.0    0  9.5 17 130   M    M   6        22 120
26  38  32  35  -9  30   0 0.20  0.0    0 17.4 29  90   M    M   7 123    38  90
27  49  34  42  -2  23   0 0.09  0.0    0 10.3 24 350   M    M   8 1      32 310
28  52  29  41  -4  24   0 0.00  0.0    0  9.7 21  70   M    M   1        28  70
29  50  32  41  -4  24   0 0.31  0.0    0 11.9 22 100   M    M   6 1      25 100
30  61  38  50   4  15   0 0.03  0.0    0 13.9 33 270   M    M  10 12     39 270
================================================================================
SM 1464  918       751   0  0.89     1.2 305.5          M      138
================================================================================
AV 48.8 30.6                              10.2 FASTST   M    M   5    MAX(MPH)
                                 MISC ---->  # 33 270               # 39  340
================================================================================
NOTES:
# LAST OF SEVERAL OCCURRENCES

COLUMN 17 PEAK WIND IN M.P.H.

PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6) , PAGE 2

                                          STATION:  DULUTH MN
                                          MONTH:    APRIL
                                          YEAR:     2009
                                          LATITUDE:   46 49 N
                                          LONGITUDE:  92 11 W

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

AVERAGE MONTHLY: 39.7   TOTAL FOR MONTH:   0.89    1 = FOG OR MIST
DPTR FM NORMAL:   0.7   DPTR FM NORMAL:   -1.20    2 = FOG REDUCING VISIBILITY
HIGHEST:    73 ON 17    GRTST 24HR  0.34 ON 29-30      TO 1/4 MILE OR LESS
LOWEST:     22 ON 11, 6                            3 = THUNDER
                        SNOW, ICE PELLETS, HAIL    4 = ICE PELLETS
                        TOTAL MONTH:   1.2 INCHES  5 = HAIL
                        GRTST 24HR   1.2 ON   M    6 = FREEZING RAIN OR DRIZZLE
                        GRTST DEPTH:   6 ON  1     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:   7
MAX 90 OR ABOVE:   0    0.10 INCH OR MORE:   3
MIN 32 OR BELOW:  21    0.50 INCH OR MORE:   0
MIN  0 OR BELOW:   0    1.00 INCH OR MORE:   0

[HDD (BASE 65) ]
TOTAL THIS MO.   751    CLEAR  (SCALE 0-3)  13
DPTR FM NORMAL   -36    PTCLDY (SCALE 4-7)  10
TOTAL FM JUL 1  9179    CLOUDY (SCALE 8-10)  7
DPTR FM NORMAL    56

[CDD (BASE 65) ]
TOTAL THIS MO.     0
DPTR FM NORMAL     0    [PRESSURE DATA]
TOTAL FM JAN 1     0    HIGHEST SLP 30.55 ON 28
DPTR FM NORMAL     0    LOWEST  SLP 29.28 ON  1

[REMARKS]
#FINAL-04-09#