Point Forecast Matrices
Issued by NWS Des Moines, IA

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Point Forecast Matrices
National Weather Service Des Moines IA
1222 PM CST Mon Dec 18 2017

IAZ060-182200-
Des Moines-Polk IA
41.54N  93.65W Elev. 924 ft
1222 PM CST Mon Dec 18 2017

Date             Mon 12/18/17            Tue 12/19/17            Wed 12/20/17
CST 3hrly     03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00

Max/Min                      51          35          51          28          47
Temp                      49 45 42 40 39 35 37 47 50 42 37 33 30 28 32 43 47 40
Dewpt                     33 32 30 31 30 28 28 29 26 24 23 23 22 21 21 21 21 23
RH                        54 60 62 70 70 75 70 49 39 48 56 66 72 75 63 41 35 50
Wind dir                  SW SW SW SW  W  W NW  N  N  N NE NE  E  E SE SE SE SE
Wind spd                  11  8  9 10  9  6  5  8  6  4  2  3  3  4  8  9 10  9
Clouds                    FW FW FW FW FW SC SC FW FW FW FW FW SC SC SC SC SC B1
PoP 12hr                      0           0           0           0           0
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00
Wind chill                      36 33 33 29                         26       34
Min chill              39    39    32    28    28    37    28    22    20    32


Date               Thu 12/21/17  Fri 12/22/17  Sat 12/23/17  Sun 12/24/17
CST 6hrly     00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18
UTC 6hrly     06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Min/Max            36    49      29    34      17    26      13    25
Temp          38   38 47 46 39   29 33 27 22   17 25 21 16   13 20 19
Dewpt         26   32 38 38 32   26 23 19 15   11 12 10  8    7  6  7
PWind dir          SE     E       N    NW      NW    NW      NW    NW
Wind char          GN    LT      GN    GN      GN    GN      GN    GN
Avg clouds    B1   B2 OV OV B2   B2 B2 B2 B2   B1 B1 B2 B2   B2 B2 B2
PoP 12hr            5    50      70    20      20     5      30    40
Rain                   S  C  L    S
Snow                              S  S     S             C    C  C  C

$$
IAZ039-182200-
Waterloo/Cedar Falls-Black Hawk IA
42.55N  92.40W Elev. 865 ft
1222 PM CST Mon Dec 18 2017

Date             Mon 12/18/17            Tue 12/19/17            Wed 12/20/17
CST 3hrly     03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00

Max/Min                      45          31          44          22          39
Temp                      43 39 36 35 34 31 32 41 43 33 29 25 24 22 28 36 38 31
Dewpt                     32 31 29 29 28 28 29 28 25 24 23 22 22 20 20 19 19 20
RH                        65 73 75 78 78 88 88 59 49 69 78 88 92 92 71 50 46 63
Wind dir                  SW SW SW SW  W  W NW NW NW NW NW  N NE  E  E SE SE SE
Wind spd                  11  9 10 10  9  9  8 10  9  5  3  2  3  3  5  8 10 10
Clouds                    SC FW SC SC SC SC FW FW FW FW FW FW SC B1 B1 B1 B1 B1
PoP 12hr                      0           0           0           0           0
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00
Wind chill                37 33 29 27 26 24 25 35                   22 30 32 22
Min chill              33    32    26    23    23    26    21    16    17    21


Date               Thu 12/21/17  Fri 12/22/17  Sat 12/23/17  Sun 12/24/17
CST 6hrly     00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18
UTC 6hrly     06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Min/Max            28    41      27    34      15    22       9    21
Temp          30   29 37 35 33   28 34 28 21   15 22 17 13    9 17 16
Dewpt         22   26 31 31 29   26 27 22 17   13 11 10  8    5  6  7
PWind dir          SE     E      NE    NW      NW    NW      NW    NW
Wind char          GN    GN      GN    GN      GN    GN      GN    GN
Avg clouds    B1   B2 OV OV OV   B2 B2 B2 B2   B2 B1 B1 B2   B2 B2 B2
PoP 12hr            5    40      80    30      20     5      20    30
Rain                   C  C  D
Sleet                  C
Snow                         D    L  C  S  S                  S  C  S

$$
IAZ048-182200-
Ames-Story IA
41.99N  93.62W Elev. 936 ft
1222 PM CST Mon Dec 18 2017

Date             Mon 12/18/17            Tue 12/19/17            Wed 12/20/17
CST 3hrly     03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00

Max/Min                      48          31          47          24          43
Temp                      46 40 37 36 34 31 34 44 46 36 31 28 26 24 29 39 43 36
Dewpt                     32 30 29 29 28 28 29 29 26 24 23 22 22 20 21 21 21 22
RH                        58 67 72 75 78 88 82 55 45 61 72 78 85 84 72 48 41 56
Wind dir                  SW SW SW SW  W  W NW NW NW  N  N NE  E  E SE SE SE SE
Wind spd                  11  9 10 10  9  6  6  8  8  5  2  3  3  4  9 10 11 10
Clouds                    CL FW FW SC SC FW SC FW FW FW FW FW SC SC SC SC SC B1
PoP 12hr                      0           0           0           0           0
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00
Wind chill                      29 28 27 24 28                   18 21 32 37 29
Min chill              36    33    27    23    24    31    23    17    17    28


Date               Thu 12/21/17  Fri 12/22/17  Sat 12/23/17  Sun 12/24/17
CST 6hrly     00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18
UTC 6hrly     06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Min/Max            32    45      26    32      14    24      11    23
Temp          35   33 44 42 35   26 31 25 20   14 23 19 14   11 20 19
Dewpt         25   30 36 35 29   24 24 20 15   11 11  9  8    6  6  8
PWind dir          SE     E       N    NW      NW    NW      NW    NW
Wind char          GN    GN      GN    GN      GN    GN      GN    GN
Avg clouds    B1   B2 OV OV OV   B2 B2 B2 B2   B1 B1 B2 B2   B2 B2 B2
PoP 12hr            5    50      80    30      20     5      30    30
Frzg rain              S
Rain                   S  C  D
Snow                         D    C  C     S             C    S  C  C

$$
IAZ004-182200-
Estherville-Emmet IA
43.40N  94.75W Elev. 1315 ft
1222 PM CST Mon Dec 18 2017

Date             Mon 12/18/17            Tue 12/19/17            Wed 12/20/17
CST 3hrly     03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00

Max/Min                      44          29          41          22          38
Temp                      42 38 36 35 33 30 30 38 40 29 26 24 23 22 26 35 38 32
Dewpt                     28 28 26 26 27 27 26 23 22 21 20 19 19 19 19 19 20 21
RH                        57 67 67 69 78 88 85 54 48 72 78 81 84 88 74 52 48 63
Wind dir                  SW SW SW  W  W NW NW NW NW NW NW NE  E  E SE SE SE SE
Wind spd                  13 12 13 11 10  9  9 11 10  5  3  3  4  6 10 14 16 13
Clouds                    B1 SC SC SC SC SC FW FW FW FW SC SC B1 B1 B1 B1 B1 B2
PoP 12hr                      0           0           0           0           0
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00
Wind chill                34 30 27 27 25 21 22 31 33 23       17 14 16 25 29 22
Min chill              29    30    26    20    20    23    18    13    13    19


Date               Thu 12/21/17  Fri 12/22/17  Sat 12/23/17  Sun 12/24/17
CST 6hrly     00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18
UTC 6hrly     06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Min/Max            27    33      17    23       9    15       3    15
Temp          31   27 31 28 24   17 22 18 15    9 14 10  6    4 12 12
Dewpt         24   26 27 24 20   16 16 13 10    7  7  6  2   -1  4  5
PWind dir          SE    NE       N    NW      NW    NW      NW    SW
Wind char          GN    GN      BZ    GN      GN    GN      GN    GN
Avg clouds    B2   OV OV OV OV   OV B2 B2 B2   B2 B1 B1 B1   B1 B2 B2
PoP 12hr           20    80      80    40      10     5      10    20
Snow                S  L  D  D    L  C  S                           S

$$
IAZ035-182200-
Fort Dodge-Webster IA
42.55N  94.18W Elev. 1165 ft
1222 PM CST Mon Dec 18 2017

Date             Mon 12/18/17            Tue 12/19/17            Wed 12/20/17
CST 3hrly     03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00

Max/Min                      46          30          45          23          42
Temp                      44 40 38 36 33 31 32 42 44 34 29 25 24 23 27 38 42 35
Dewpt                     30 29 27 27 27 27 28 27 24 22 22 20 21 19 20 20 21 22
RH                        57 64 64 69 78 85 85 55 45 61 75 81 88 84 74 48 43 59
Wind dir                  SW SW SW SW  W NW NW NW NW  N  N  E  E  E SE SE SE SE
Wind spd                  12 10 11 10  8  8  6  9  9  4  2  3  3  5 10 13 13 13
Clouds                    FW FW SC SC SC SC FW FW FW FW FW SC SC SC B1 B1 SC B1
PoP 12hr                      0           0           0           0           0
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00
Wind chill                38 33 31 29 26 24 25 36                16 17 30 35 26
Min chill              33    32    29    24    23    29    20    16    14    25


Date               Thu 12/21/17  Fri 12/22/17  Sat 12/23/17  Sun 12/24/17
CST 6hrly     00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18
UTC 6hrly     06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Min/Max            31    40      22    29      12    21       8    20
Temp          33   31 38 35 29   22 29 22 16   12 19 16 11    9 17 16
Dewpt         25   28 32 29 24   21 21 16 12    9  9  7  5    3  5  6
PWind dir          SE     E       N    NW      NW    NW      NW    NW
Wind char          GN    GN      GN    GN      GN    GN      GN    GN
Avg clouds    B2   B2 OV OV OV   OV B2 B2 B2   B2 B1 B2 B2   B2 B2 B2
PoP 12hr           10    70      80    30      10     5      30    20
Rain                   C  L  D
Sleet                  C
Snow                         D    L  C                   C    S  S  S

$$
IAZ094-182200-
Lamoni-Decatur IA
40.63N  93.90W Elev. 1125 ft
1222 PM CST Mon Dec 18 2017

Date             Mon 12/18/17            Tue 12/19/17            Wed 12/20/17
CST 3hrly     03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00

Max/Min                      53          34          53          28          47
Temp                      51 46 43 40 38 34 38 50 52 42 37 34 30 28 32 43 47 40
Dewpt                     34 33 32 32 32 30 30 31 29 27 26 24 23 22 22 22 24 26
RH                        52 60 65 73 79 85 73 48 41 55 64 66 75 78 66 43 40 57
Wind dir                  SW SW SW SW SW  W NW  N  N NE NE NE  E  E  E SE SE SE
Wind spd                  14  9 11 11 10  8  6  8  8  5  5  5  5  6  9 10 10  9
Clouds                    CL CL CL FW FW SC SC FW FW FW SC FW FW SC FW FW SC SC
PoP 12hr                      0           0           0           0           0
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00
Wind chill                      37 33 31 27                   24 21 24 37    34
Min chill                          32    27    27    37    28    21    20    34


Date               Thu 12/21/17  Fri 12/22/17  Sat 12/23/17  Sun 12/24/17
CST 6hrly     00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18
UTC 6hrly     06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Min/Max            37    52      29    36      17    28      14    25
Temp          40   39 50 48 42   29 34 26 21   17 26 22 16   14 21 19
Dewpt         30   36 42 41 36   26 23 19 14   13 12 11  9    8  8  9
PWind dir          SE    SE       N    NW      NW    NW      NW    NW
Wind char          GN    GN      GN    GN      GN    GN      GN    GN
Avg clouds    B1   B2 B2 B2 B2   B2 B2 B2 B1   B1 B1 B2 B2   B2 B2 B2
PoP 12hr            5    30      30    10      20     5      40    50
Rain                   S  C  C
Snow                                       S             S    C  C  C

$$
IAZ017-182200-
Mason City-Cerro Gordo IA
43.16N  93.33W Elev. 1189 ft
1222 PM CST Mon Dec 18 2017

Date             Mon 12/18/17            Tue 12/19/17            Wed 12/20/17
CST 3hrly     03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00

Max/Min                      43          30          42          21          37
Temp                      41 37 36 35 33 30 31 39 41 29 25 23 22 21 25 34 36 29
Dewpt                     30 30 28 27 27 27 28 25 23 22 21 20 20 19 19 19 19 19
RH                        65 75 72 72 78 88 88 57 48 75 84 88 92 92 78 54 50 66
Wind dir                  SW SW SW  W  W NW NW NW NW NW NW  N NE  E  E SE SE SE
Wind spd                  12 10 12 12 11 10 10 11 10  5  4  3  3  5  8 10 12 12
Wind gust                       23
Clouds                    SC SC SC SC SC SC FW FW FW FW FW SC SC B1 B2 B2 B1 B2
PoP 12hr                      0           0           0           0           0
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00
Wind chill                34 30 28 26 24 22 23 32 34 23 19       13 16 26 28 18
Min chill              30    29    25    21    21    22    17    13    12    17


Date               Thu 12/21/17  Fri 12/22/17  Sat 12/23/17  Sun 12/24/17
CST 6hrly     00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18
UTC 6hrly     06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Min/Max            27    36      23    28      12    18       6    17
Temp          30   27 34 30 28   23 28 22 17   12 17 13  8    7 14 13
Dewpt         21   26 29 27 24   23 23 18 13   10  9  7  4    1  4  5
PWind dir          SE     E       N    NW      NW    NW      NW    NW
Wind char          GN    GN      GN    GN      GN    GN      GN    GN
Avg clouds    B2   OV OV OV OV   OV B2 B2 B2   B2 B1 B1 B2   B2 B2 B2
PoP 12hr           20    80      80    40      20     5      20    20
Frzg rain              S
Rain                      D
Sleet                  S
Snow                S  L  D  D    D  C  S  S                  S  S  S

$$
IAZ049-182200-
Marshalltown-Marshall IA
42.11N  92.91W Elev. 972 ft
1222 PM CST Mon Dec 18 2017

Date             Mon 12/18/17            Tue 12/19/17            Wed 12/20/17
CST 3hrly     03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00

Max/Min                      46          30          46          23          41
Temp                      44 39 36 35 32 30 32 43 45 35 30 27 25 23 28 38 41 32
Dewpt                     31 30 29 29 28 28 28 28 25 24 23 22 21 20 20 20 19 20
RH                        60 70 75 78 85 92 85 55 45 64 75 81 84 88 71 48 41 61
Wind dir                  SW SW SW SW  W  W NW NW NW NW NW  N NE  E  E SE SE SE
Wind spd                  12  8 10 10  9  8  6  9  9  5  3  3  3  4  6 10 11 10
Clouds                    FW FW FW SC SC SC SC FW FW FW FW FW SC SC B1 B1 SC B1
PoP 12hr                      0           0           0           0           0
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00
Wind chill                38    28 28 24 22 26                   17 21 31 34 24
Min chill              33    33    27    22    23    29    22    16    16    23


Date               Thu 12/21/17  Fri 12/22/17  Sat 12/23/17  Sun 12/24/17
CST 6hrly     00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18
UTC 6hrly     06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Min/Max            30    43      27    33      15    23       9    22
Temp          32   31 42 39 35   27 33 27 21   15 22 18 13    9 18 17
Dewpt         23   27 33 33 30   26 25 20 15   12 11  9  7    5  6  7
PWind dir          SE     E      NE    NW      NW    NW      NW    NW
Wind char          GN    GN      GN    GN      GN    GN      GN    GN
Avg clouds    B1   B2 OV OV OV   B2 B2 B2 B2   B2 B1 B1 B2   B2 B2 B2
PoP 12hr            5    40      80    30      20     5      20    30
Rain                   S  C  D
Sleet                  S
Snow                         D    C  C     S             S    S  C  C

$$
IAZ086-182200-
Ottumwa-Wapello IA
41.11N  92.45W Elev. 836 ft
1222 PM CST Mon Dec 18 2017

Date             Mon 12/18/17            Tue 12/19/17            Wed 12/20/17
CST 3hrly     03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00

Max/Min                      51          35          51          26          45
Temp                      49 45 41 40 38 35 38 48 50 40 34 31 28 26 31 42 44 36
Dewpt                     35 34 32 33 32 30 31 31 28 26 24 24 23 21 22 21 20 21
RH                        58 65 70 76 79 82 76 51 42 57 66 75 81 81 69 43 38 54
Wind dir                  SW SW SW SW SW  W NW NW  N  N  N NE NE  E  E SE SE SE
Wind spd                  13  9 10 12 10  9  6  8  8  5  4  4  4  5  8  9 10  8
Clouds                    CL CL CL FW FW SC SC FW FW FW FW FW SC SC SC FW SC SC
PoP 12hr                      0           0           0           0           0
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00
Wind chill                      35 33 31 28                      19 24 36 38 30
Min chill              39    39    31    27    27    35    26    18    20    29


Date               Thu 12/21/17  Fri 12/22/17  Sat 12/23/17  Sun 12/24/17
CST 6hrly     00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18
UTC 6hrly     06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Min/Max            33    50      32    38      19    29      15    26
Temp          34   34 46 47 44   32 38 32 25   19 27 23 18   15 22 20
Dewpt         24   29 36 38 37   31 27 23 18   15 13 11 10    9  9  9
PWind dir          SE    SE       S    NW      NW    NW      NW     N
Wind char          GN    GN      GN    GN      GN    GN      GN    GN
Avg clouds    SC   B2 B2 B2 B2   B2 B2 B2 B2   B1 B1 B1 B2   B2 B2 B2
PoP 12hr            0    30      40    20      20     5      30    50
Rain                      C  C          S
Snow                                    S  S                  C  C  C

$$



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