Point Forecast Matrices
Issued by NWS Des Moines, IA

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Point Forecast Matrices
National Weather Service Des Moines IA
1246 AM CDT Wed Sep 3 2025

IAZ060-040900-
Des Moines-Polk IA
41.54N  93.65W Elev. 924 ft
1246 AM CDT Wed Sep 3 2025

Date           09/02/25      Wed 09/03/25            Thu 09/04/25            Fri
CDT 3hrly     16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07
UTC 3hrly     21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12

Min/Max                      60          72          47          73          51
Temp                   64 62 61 67 70 70 65 57 54 50 47 59 68 72 71 65 62 56 52
Dewpt                  57 57 58 61 60 56 51 49 48 45 44 46 46 48 51 55 57 51 47
RH                     78 84 90 81 71 61 60 75 80 83 89 62 45 42 49 70 84 83 83
Wind dir               SW SW  W NW NW NW  N  N NW NW  W  W  W SW SW SW  W NW NW
Wind spd                2  5  5  9 11 13 12  8  5  5  4  5  9 11 10 11 11 10 10
Wind gust                             24
Clouds                 SC SC B2 B2 B2 B2 SC FW SC SC FW CL FW FW SC SC FW FW FW
PoP 12hr                     20          40           0           0          30
QPF 12hr                   0.02        0.12           0           0           0
Snow 12hr                 00-00       00-00       00-00
Rain shwrs                    C  C  C  S                          C  C  S  S
Tstms                         C  S  S                             S  S


Date           09/05  Sat 09/06/25  Sun 09/07/25  Mon 09/08/25  Tue 09/09/25
CDT 6hrly     13 19   01 07 13 19   01 07 13 19   01 07 13 19   01 07 13 19
UTC 6hrly     18 00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18 00

Max/Min          68      46    72      46    75      54    70      57    76
Temp          65 65   52 47 68 67   52 48 71 71   58 57 68 67   60 59 73 73
Dewpt         45 44   45 43 42 42   46 44 46 47   51 51 54 55   56 55 58 59
PWind dir        NW       W    NW       E    SE      SE    SE      SE    SW
Wind char        GN      LT    LT      LT    LT      LT    GN      LT    GN
Avg clouds    FW FW   FW CL FW FW   FW FW FW SC   SC B1 B2 B1   B2 B2 B1 SC
PoP 12hr          0       0     0       0     5      10    20      30    10
Rain shwrs                                               S  S    C  C

$$
IAZ039-040900-
Waterloo/Cedar Falls-Black Hawk IA
42.55N  92.40W Elev. 865 ft
1246 AM CDT Wed Sep 3 2025

Date           09/02/25      Wed 09/03/25            Thu 09/04/25            Fri
CDT 3hrly     16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07
UTC 3hrly     21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12

Min/Max                      59          68          42          67          49
Temp                   63 61 61 64 65 66 61 54 49 45 43 55 63 66 64 59 57 53 50
Dewpt                  59 59 59 59 55 51 49 47 45 42 41 45 44 46 49 52 53 49 46
RH                     87 93 93 84 70 58 65 77 86 89 93 69 50 48 58 78 86 86 86
Wind dir               SW  W  W NW NW NW NW NW NW NW  W  W  W SW  S  S  W  W NW
Wind spd                5  5  6 10 13 16 14 10  5  5  5  8 10 12 10 11 12 12 12
Wind gust                             26
Clouds                 B1 B1 B2 B2 B2 B1 SC SC SC FW FW FW FW SC B1 B1 SC SC SC
PoP 12hr                     30          30           0           0          60
QPF 12hr                   0.03        0.06           0           0        0.03
Snow 12hr                 00-00       00-00       00-00
Rain shwrs                 C  C  S  S                             L  L  S  S
Tstms                      S  S                                   S  S


Date           09/05  Sat 09/06/25  Sun 09/07/25  Mon 09/08/25  Tue 09/09/25
CDT 6hrly     13 19   01 07 13 19   01 07 13 19   01 07 13 19   01 07 13 19
UTC 6hrly     18 00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18 00

Max/Min          63      43    66      43    69      50    68      54    72
Temp          60 59   48 45 63 61   47 45 66 64   53 53 65 64   57 55 68 68
Dewpt         45 45   44 42 44 44   43 43 47 50   48 48 54 55   53 52 58 59
PWind dir        NW       W    NW      NW    SE      SE    SE      SE    SW
Wind char        GN      LT    GN      LT    LT      LT    GN      LT    GN
Avg clouds    SC SC   FW FW FW FW   FW FW FW FW   SC B1 B2 B1   B1 B2 B2 B1
PoP 12hr          0       0     0       0     0       5    20      30    20
Rain shwrs                                               S  S    S  C  S

$$
IAZ048-040900-
Ames-Story IA
41.99N  93.62W Elev. 936 ft
1246 AM CDT Wed Sep 3 2025

Date           09/02/25      Wed 09/03/25            Thu 09/04/25            Fri
CDT 3hrly     16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07
UTC 3hrly     21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12

Min/Max                      59          70          43          71          49
Temp                   62 60 59 66 67 68 62 54 50 47 44 57 65 71 69 62 58 53 49
Dewpt                  58 58 58 61 58 54 51 49 46 44 42 45 45 49 52 56 55 50 46
RH                     87 93 96 84 73 61 67 83 86 89 93 64 48 46 55 81 90 89 89
Wind dir               SW  W  W NW NW  N NW  N NW NW NW  W  W SW SW SW NW NW NW
Wind spd                4  4  5  9 11 13 12  8  4  4  3  5  9 10 10 10 10 10 10
Wind gust                          21 25
Clouds                 SC B1 B2 B2 B2 B1 SC FW SC SC FW FW FW FW SC SC FW FW FW
PoP 12hr                     40          50           0           0          50
QPF 12hr                   0.02        0.11           0           0        0.01
Snow 12hr                 00-00       00-00       00-00
Rain shwrs                 S  C  C  S                             C  C  S  S
Tstms                         S                                   S  S


Date           09/05  Sat 09/06/25  Sun 09/07/25  Mon 09/08/25  Tue 09/09/25
CDT 6hrly     13 19   01 07 13 19   01 07 13 19   01 07 13 19   01 07 13 19
UTC 6hrly     18 00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18 00

Max/Min          67      43    69      44    74      53    70      55    76
Temp          63 62   50 44 66 64   49 45 68 68   56 55 67 66   58 57 71 71
Dewpt         45 45   45 42 44 44   46 43 47 50   50 51 55 56   56 54 60 59
PWind dir        NW      NW    NW      NE    SE      SE    SE      SE    SW
Wind char        GN      LT    LT      LT    LT      LT    GN      LT    GN
Avg clouds    FW SC   FW FW FW FW   FW FW FW FW   SC B1 B2 B1   B2 B2 B1 SC
PoP 12hr          0       0     0       0     0      10    20      30    10
Rain shwrs                                               S  S    C  C
Tstms                                                               S

$$
IAZ004-040900-
Estherville-Emmet IA
43.40N  94.75W Elev. 1315 ft
1246 AM CDT Wed Sep 3 2025

Date           09/02/25      Wed 09/03/25            Thu 09/04/25            Fri
CDT 3hrly     16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07
UTC 3hrly     21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12

Min/Max                      57          65          39          68          46
Temp                   62 60 59 57 62 64 59 50 45 42 40 54 62 67 64 56 52 49 47
Dewpt                  60 58 56 53 49 47 45 42 40 39 38 42 45 48 53 51 46 43 42
RH                     93 93 90 86 62 54 60 74 82 89 92 64 54 50 67 83 80 80 83
Wind dir                W NW  N  N  N NW  N NW NW NW  W  W SW SW SW NW NW NW NW
Wind spd                6  8 10 13 17 18 14 10  6  5  5  8 12 13 12 13 12 13 13
Wind gust                             29
Clouds                 B1 OV OV B2 SC SC SC SC FW SC FW FW FW SC B1 SC FW SC SC
PoP 12hr                     30          30           0          10          40
QPF 12hr                   0.03        0.01           0           0        0.01
Snow 12hr                 00-00       00-00       00-00
Rain shwrs              C  C  C                                   C  C
Tstms                   S                                         C


Date           09/05  Sat 09/06/25  Sun 09/07/25  Mon 09/08/25  Tue 09/09/25
CDT 6hrly     13 19   01 07 13 19   01 07 13 19   01 07 13 19   01 07 13 19
UTC 6hrly     18 00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18 00

Max/Min          62      41    65      42    68      51    70      54    72
Temp          58 58   46 42 60 61   46 43 63 64   53 53 65 65   57 55 68 67
Dewpt         44 44   40 38 43 46   42 40 49 52   48 48 56 56   54 53 59 58
PWind dir        NW      NW    NW      NE     S      SE     S       S     W
Wind char        BZ      LT    GN      LT    LT      LT    GN      GN    GN
Avg clouds    SC SC   FW FW FW FW   FW FW FW FW   SC B1 B1 B1   B2 B2 B1 SC
PoP 12hr          0       0     0       0     0      10    20      30    10
Rain shwrs                                               S  S    C  C
Tstms                                                    S  S    S  S

$$
IAZ035-040900-
Fort Dodge-Webster IA
42.55N  94.18W Elev. 1165 ft
1246 AM CDT Wed Sep 3 2025

Date           09/02/25      Wed 09/03/25            Thu 09/04/25            Fri
CDT 3hrly     16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07
UTC 3hrly     21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12

Min/Max                      59          68          41          71          46
Temp                   64 61 59 62 64 66 61 53 48 44 41 55 64 69 67 60 55 50 48
Dewpt                  60 59 59 58 54 50 49 46 43 41 40 45 45 49 53 55 51 46 44
RH                     87 93100 87 70 56 65 77 83 89 96 69 50 49 61 84 86 86 86
Wind dir               SW  W NW  N  N  N NW  N NW NW  W  W SW SW  S  W NW NW NW
Wind spd                5  5  5 11 13 14 12  8  5  4  4  5 10 12 11 11 10 10 10
Clouds                 B1 B2 B2 B2 B2 B1 SC SC SC SC FW FW FW SC SC SC FW FW FW
PoP 12hr                     40          30           0           5          60
QPF 12hr                   0.03        0.06           0           0        0.01
Snow 12hr                 00-00       00-00       00-00
Rain shwrs              S  C  C  C  S                             L  L
Tstms                      S  S                                   C


Date           09/05  Sat 09/06/25  Sun 09/07/25  Mon 09/08/25  Tue 09/09/25
CDT 6hrly     13 19   01 07 13 19   01 07 13 19   01 07 13 19   01 07 13 19
UTC 6hrly     18 00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18 00

Max/Min          65      42    69      42    72      52    71      55    75
Temp          61 60   47 43 64 63   47 44 67 66   55 54 67 66   58 56 71 69
Dewpt         45 44   42 40 44 47   44 42 49 51   49 50 56 56   54 54 60 59
PWind dir        NW      NW    NW      NE    SE      SE    SE      SE    SW
Wind char        GN      LT    LT      LT    LT      LT    GN      LT    GN
Avg clouds    FW SC   FW FW FW FW   FW FW FW FW   SC B1 B1 B1   B2 B2 B2 SC
PoP 12hr          0       0     0       0     0      10    20      30    10
Rain shwrs                                               S  S    C  C
Tstms                                                       S    S  S

$$
IAZ094-040900-
Lamoni-Decatur IA
40.63N  93.90W Elev. 1125 ft
1246 AM CDT Wed Sep 3 2025

Date           09/02/25      Wed 09/03/25            Thu 09/04/25            Fri
CDT 3hrly     16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07
UTC 3hrly     21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12

Min/Max                      58          75          46          72          51
Temp                   62 60 58 69 73 72 65 58 53 49 46 60 68 71 69 64 62 58 53
Dewpt                  57 57 57 62 63 61 57 54 50 47 45 49 48 50 53 55 58 53 47
RH                     84 90 96 78 71 68 75 86 89 93 96 67 49 47 57 73 87 83 80
Wind dir               SW  W SW  W NW  N  N  N  N NW NW  W  W SW SW SW  W NW NW
Wind spd                4  4  5  8 10 11 11  6  4  4  3  4  6  9  8  9 10  9  8
Clouds                 FW FW SC B2 B2 B2 B2 SC SC SC SC FW CL CL FW SC SC SC FW
PoP 12hr                      5          50          10           0          20
QPF 12hr                      0        0.11           0           0           0
Snow 12hr                 00-00       00-00       00-00
Rain shwrs                    S  C  C  C                                S  S
Tstms                         S  C  C  C


Date           09/05  Sat 09/06/25  Sun 09/07/25  Mon 09/08/25  Tue 09/09/25
CDT 6hrly     13 19   01 07 13 19   01 07 13 19   01 07 13 19   01 07 13 19
UTC 6hrly     18 00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18 00

Max/Min          68      45    72      47    74      53    69      56    75
Temp          65 63   51 46 68 67   53 49 71 68   58 55 66 66   60 58 71 71
Dewpt         45 46   45 43 44 46   47 44 47 51   53 53 55 58   58 57 59 60
PWind dir        NW      NW    NW      NE    SE      SE    SE       S    SW
Wind char        GN      LT    LT      LT    LT      LT    GN      LT    LT
Avg clouds    FW FW   FW CL FW FW   FW FW FW SC   B1 B1 B1 B1   B2 B2 B1 SC
PoP 12hr         10       0     0       0     5      10    20      20    10
Rain shwrs                                               S  S    S  S

$$
IAZ017-040900-
Mason City-Cerro Gordo IA
43.16N  93.33W Elev. 1189 ft
1246 AM CDT Wed Sep 3 2025

Date           09/02/25      Wed 09/03/25            Thu 09/04/25            Fri
CDT 3hrly     16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07
UTC 3hrly     21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12

Min/Max                      57          65          40          66          46
Temp                   65 61 59 60 63 63 59 50 46 43 41 54 61 65 64 57 52 49 48
Dewpt                  60 59 58 55 52 48 46 44 41 40 39 42 42 46 49 52 48 45 43
RH                     84 93 96 84 67 58 62 80 83 89 92 64 49 50 58 83 86 86 83
Wind dir                W  W NW  N  N NW NW NW NW NW  W  W  W SW  S SW NW NW NW
Wind spd                8  6  6 11 14 16 13  9  5  4  4  6 10 12 10 11 10 12 12
Wind gust                             27
Clouds                 B2 B2 B2 B2 B1 B1 SC FW SC SC SC FW FW B1 B2 B1 SC SC SC
PoP 12hr                     40          30           0           5          60
QPF 12hr                   0.03        0.02           0           0        0.08
Snow 12hr                 00-00       00-00       00-00
Rain shwrs              C  C  C  S                                L  L
Tstms                   S                                         S


Date           09/05  Sat 09/06/25  Sun 09/07/25  Mon 09/08/25  Tue 09/09/25
CDT 6hrly     13 19   01 07 13 19   01 07 13 19   01 07 13 19   01 07 13 19
UTC 6hrly     18 00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18 00

Max/Min          61      41    64      41    69      49    68      53    71
Temp          58 58   46 43 61 60   46 42 64 63   51 52 65 64   56 55 67 66
Dewpt         45 44   42 40 43 44   42 41 47 48   46 47 54 55   52 52 58 58
PWind dir        NW       W    NW      NW     S      SE     S      SE    SW
Wind char        GN      LT    GN      LT    LT      LT    GN      LT    GN
Avg clouds    SC SC   FW FW FW FW   FW FW FW FW   SC B1 B1 B1   B2 B2 B2 B1
PoP 12hr          0       0     0       0     0       5    20      30    10
Rain shwrs                                               S  S    C  C
Tstms                                                            S  S

$$
IAZ049-040900-
Marshalltown-Marshall IA
42.11N  92.91W Elev. 972 ft
1246 AM CDT Wed Sep 3 2025

Date           09/02/25      Wed 09/03/25            Thu 09/04/25            Fri
CDT 3hrly     16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07
UTC 3hrly     21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12

Min/Max                      58          68          41          69          47
Temp                   61 60 58 64 66 67 61 53 49 45 42 56 63 67 66 60 57 52 48
Dewpt                  57 58 58 61 57 53 50 47 45 42 40 45 45 47 50 53 53 48 45
RH                     87 93100 90 73 61 67 80 86 89 93 66 52 49 56 78 86 86 89
Wind dir               SW  W  W NW  N NW NW  N NW NW NW  W  W SW  S  S  W  W  W
Wind spd                4  5  5  9 11 14 11  8  5  5  4  6  9 10  9 10 10 10 10
Clouds                 SC B1 B2 B2 B2 B1 SC SC SC SC FW FW CL FW SC B1 FW FW FW
PoP 12hr                     30          40           0           0          50
QPF 12hr                   0.02        0.10           0           0        0.01
Snow 12hr                 00-00       00-00       00-00
Rain shwrs                 S  C  C  S                             C  C  C  C
Tstms                         S                                   S  S


Date           09/05  Sat 09/06/25  Sun 09/07/25  Mon 09/08/25  Tue 09/09/25
CDT 6hrly     13 19   01 07 13 19   01 07 13 19   01 07 13 19   01 07 13 19
UTC 6hrly     18 00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18 00

Max/Min          64      42    67      42    71      50    68      53    73
Temp          61 60   48 43 64 61   47 43 66 65   54 53 65 64   57 55 69 69
Dewpt         46 45   43 40 44 44   43 41 48 50   47 48 55 55   54 52 59 59
PWind dir        NW       W    NW       N    SE      SE    SE      SE    SW
Wind char        GN      LT    LT      LT    LT      LT    GN      LT    LT
Avg clouds    FW SC   FW FW FW FW   CL FW FW FW   SC B1 B2 B1   B1 B2 B2 B1
PoP 12hr          0       0     0       0     0      10    20      30    10
Rain shwrs                                               S  S    S  C

$$
IAZ086-040900-
Ottumwa-Wapello IA
41.11N  92.45W Elev. 836 ft
1246 AM CDT Wed Sep 3 2025

Date           09/02/25      Wed 09/03/25            Thu 09/04/25            Fri
CDT 3hrly     16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07
UTC 3hrly     21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12

Min/Max                      58          74          45          73          52
Temp                   59 60 59 69 71 71 65 56 52 49 46 59 67 72 69 63 62 59 54
Dewpt                  56 57 57 62 63 60 56 52 49 47 45 47 45 47 51 52 57 54 48
RH                     90 90 93 78 76 68 73 86 89 93 96 64 45 41 53 67 84 83 80
Wind dir               SW  W  W  W NW NW NW  N NW NW NW  W  W SW SW  S  W  W NW
Wind spd                4  5  5  9 11 12 11  8  5  5  5  5  8  9  8 10 11 11 10
Wind gust                             23                               21
Clouds                 FW SC SC B2 B2 B1 B1 FW SC FW SC FW CL CL SC SC SC FW FW
PoP 12hr                      5          50          10           0          40
QPF 12hr                      0        0.29           0           0           0
Snow 12hr                 00-00       00-00       00-00
Rain shwrs                    S  C  C  C                          C  C  C  C
Tstms                         S  S  C  S                             S


Date           09/05  Sat 09/06/25  Sun 09/07/25  Mon 09/08/25  Tue 09/09/25
CDT 6hrly     13 19   01 07 13 19   01 07 13 19   01 07 13 19   01 07 13 19
UTC 6hrly     18 00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18 00

Max/Min          69      45    72      45    75      53    70      55    76
Temp          65 64   51 46 68 66   51 48 71 70   57 56 67 66   60 58 71 71
Dewpt         45 46   45 44 42 44   46 44 46 48   49 51 54 56   56 56 58 59
PWind dir        NW      NW    NW      NE    SE      SE    SE      SE    SW
Wind char        GN      LT    LT      LT    LT      LT    LT      LT    LT
Avg clouds    FW FW   FW FW FW FW   CL FW FW SC   SC B1 B1 B1   B2 B2 B2 B1
PoP 12hr          5       0     0       0     5      10    20      30    20
Rain shwrs                                               S  S    S  C  S

$$