Point Forecast Matrices
Issued by NWS Des Moines, IA

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Point Forecast Matrices
National Weather Service Des Moines IA
337 AM CST Tue Feb 20 2018

IAZ060-202200-
Des Moines-Polk IA
41.54N  93.65W Elev. 924 ft
337 AM CST Tue Feb 20 2018

Date             Tue 02/20/18            Wed 02/21/18            Thu 02/22/18
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                      29          10          28          19          33
Temp             28 28 28 27 23 19 16 12 10 15 23 28 24 22 21 19 21 24 31 33 32
Dewpt            25 23 22 20 15 13 10  8  6  7  8 10 11 13 13 14 15 18 21 23 26
RH               88 81 78 74 71 77 77 84 83 70 52 46 57 68 71 80 77 77 66 66 78
Wind dir         NW NW NW NW NW NW NW  N  N  N  N NE NE NE NE  E  E  E  E  E  E
Wind spd          6  9 11 14 12 14 12 11  9  6  6  6  5  6  6  6  8  6  8  8  6
Clouds           OV OV OV B2 B2 B1 SC SC FW FW FW FW B1 B2 B2 B2 B2 B2 B2 B2 OV
PoP 12hr                     70           0           0          40          30
QPF 12hr                   0.05           0           0        0.03        0.01
Snow 12hr                 00-00       00-00       00-00
Frzg rain         L  C                                                        L
Rain                                                                       C
Snow                                                        C  C  C  C  C     S
Wind chill       22 19 18 15 11  5  2 -1 -3  4 15 20 17 14 11 10 12 16 23 27 26
Min chill        21    17     9     0    -4    -3    16    10    10    13    24
Winter Weath      Y  Y


Date               Fri 02/23/18  Sat 02/24/18  Sun 02/25/18  Mon 02/26/18
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    39      24    39      22    43      26    44
Temp          31   27 38 34 26   26 38 37 29   23 40 40 29   28 43 40
Dewpt         28   25 29 26 23   22 28 28 23   20 27 27 23   22 28 26
PWind dir           E     N       N    NE      NW    SW       S     W
Wind char          LT    LT      LT    GN      GN    GN      LT    GN
Avg clouds    OV   OV B1 B1 B1   B1 B2 B2 B1   SC SC SC SC   SC SC SC
PoP 12hr           60     5      20    70      40     5       0     5
Frzg rain      L    C
Rain                                 C  L  C
Sleet          S
Snow                              S  C     C

$$
IAZ039-202200-
Waterloo/Cedar Falls-Black Hawk IA
42.55N  92.40W Elev. 865 ft
337 AM CST Tue Feb 20 2018

Date             Tue 02/20/18            Wed 02/21/18            Thu 02/22/18
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                      30           9          24          15          32
Temp             30 30 29 26 22 18 13 11  9 12 21 24 19 16 15 15 16 20 28 32 29
Dewpt            28 27 24 22 18 14 10  8  5  7  9 10 11 13 12 14 14 17 20 23 25
RH               92 88 81 85 84 84 87 87 83 80 59 54 70 88 88 96 92 88 71 69 85
Wind dir          W NW NW NW NW NW NW NW NW  N  N  N NE NE NE  E  E  E  E  E  E
Wind spd          4  6 10 14 13 14 14 12 10  8  6  5  5  5  6  6  8  8  9  9  8
Clouds           OV OV OV OV B2 B1 SC SC SC FW FW FW SC B1 B2 B2 B2 B1 B2 B2 OV
PoP 12hr                     70           0           0          30          40
QPF 12hr                   0.04           0           0        0.01        0.01
Snow 12hr                 00-00       00-00       00-00
Frzg rain         L  C  S                                                     C
Snow                                                        C  C  C  C  C  C  L
Wind chill          23 20 14  9  3 -2 -4 -5  0 12 17 11  7  5  5  5 10 19 24 21
Min chill        24    19     8    -3    -7    -6    11     5     5     7    20
Winter Weath      Y  Y


Date               Fri 02/23/18  Sat 02/24/18  Sun 02/25/18  Mon 02/26/18
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            25    35      20    37      20    37      23    40
Temp          28   25 34 31 23   21 34 36 27   20 35 36 27   24 39 36
Dewpt         27   25 29 25 21   20 28 29 24   20 25 26 23   21 29 26
PWind dir          SE    NW       N    NE      NW     W       S    SW
Wind char          LT    LT      LT    LT      GN    GN      GN    GN
Avg clouds    OV   OV B2 B1 SC   B1 B1 B2 B2   B1 SC SC SC   SC SC SC
PoP 12hr           60    10       5    60      40     5       5     5
Frzg rain      C    L
Rain                                    L  C
Snow           L    S                C  L  C    C

$$
IAZ048-202200-
Ames-Story IA
41.99N  93.62W Elev. 936 ft
337 AM CST Tue Feb 20 2018

Date             Tue 02/20/18            Wed 02/21/18            Thu 02/22/18
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                      27           8          25          17          32
Temp             28 26 26 23 20 17 13 10  8 12 20 25 19 18 18 17 19 21 28 32 30
Dewpt            25 21 20 18 15 12  9  7  4  5  8 10 11 13 12 14 15 17 20 23 24
RH               88 81 78 81 81 80 84 87 83 73 59 52 70 80 77 88 84 84 71 69 78
Wind dir         NW NW NW NW NW NW NW NW  N  N  N  N NE NE  E  E  E  E  E  E  E
Wind spd          9 11 13 17 14 16 14 11 10  6  6  8  6  6  6  6  8  8  9  8  8
Clouds           OV OV OV B2 B2 B1 SC SC FW FW FW FW SC B1 B2 B2 B2 B1 B2 B2 OV
PoP 12hr                     60           0           0          40          30
QPF 12hr                   0.02           0           0        0.03        0.01
Snow 12hr                 00-00       00-00       00-00
Frzg rain         L  S                                                        L
Snow                                                        C  C  C  C  C  C  C
Wind chill       19 16 14 10  7  2 -3 -6 -7  1 11 16 10  9  8  8  9 12 20 25 22
Min chill        18    13     6    -4    -8    -8    10     7     7     8    20
Winter Weath      Y  Y


Date               Fri 02/23/18  Sat 02/24/18  Sun 02/25/18  Mon 02/26/18
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            25    35      21    36      20    40      24    41
Temp          29   25 35 30 24   22 35 33 26   21 37 38 28   25 40 37
Dewpt         27   24 28 25 21   20 27 26 22   18 26 27 24   21 28 26
PWind dir          SE    NW       N    NE      NW    SW       S     W
Wind char          LT    LT      LT    GN      GN    GN      GN    GN
Avg clouds    OV   OV B1 SC SC   B1 B2 B2 B1   SC SC SC SC   SC SC SC
PoP 12hr           60     5      10    70      40     5       0     5
Frzg rain      L    C
Rain                                    L
Snow           S                     C  L  C

$$
IAZ004-202200-
Estherville-Emmet IA
43.40N  94.75W Elev. 1315 ft
337 AM CST Tue Feb 20 2018

Date             Tue 02/20/18            Wed 02/21/18            Thu 02/22/18
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                      19          -3          19           6          25
Temp             17 17 19 17 13  8  3  0 -3  3 15 19 11  7  6  8 10 12 22 25 25
Dewpt            14 11 12 11  8  5  1  0 -4 -2  3  7  4  6  4  5  7  9 15 18 20
RH               88 77 74 77 80 87 91100 95 79 58 59 73 96 91 87 87 87 74 74 81
Wind dir          N NW NW NW NW NW NW  W  W  W  W SW  E SE SE SE  E  E  E  E  E
Wind spd         10 13 17 18 14 13 11  8  8  5  4  5  4  4  5  5  6  6 10  8  9
Clouds           OV OV OV B2 SC SC FW FW CL CL FW CL FW SC B1 B1 B2 B2 B2 B2 OV
PoP 12hr                     20           0           0          20          50
QPF 12hr                      0           0           0           0        0.04
Snow 12hr                 00-00       00-00       00-00
Frzg rain
Snow              S                                         S  S  C  C  C  C  L
Wind chill        5  3  4  1 -3 -8-14-14-18 -8  8 11  3 -2 -4 -2 -2  1 11 16 15
Min chill         5     1    -4   -16   -19   -18     3    -4    -4    -3    12
Winter Weath      Y  Y


Date               Fri 02/23/18  Sat 02/24/18  Sun 02/25/18  Mon 02/26/18
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            17    27      13    29      15    33      19    33
Temp          20   17 27 23 15   14 26 28 18   16 30 31 22   20 32 30
Dewpt         20   17 20 17 14   14 20 21 16   15 22 23 19   18 24 21
PWind dir           S    NW       N    NE      NW    SW       S     W
Wind char          LT    LT      LT    GN      GN    GN      GN    GN
Avg clouds    OV   B2 B1 SC SC   B1 B2 B2 B1   SC SC SC SC   SC B1 SC
PoP 12hr           70     5       5    70      30     5       5    30
Frzg rain           S
Snow           L    S                C  L  C                     C

$$
IAZ035-202200-
Fort Dodge-Webster IA
42.55N  94.18W Elev. 1165 ft
337 AM CST Tue Feb 20 2018

Date             Tue 02/20/18            Wed 02/21/18            Thu 02/22/18
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                      24           3          22          13          29
Temp             24 24 24 22 17 13 10  6  3  7 17 22 18 13 14 14 15 17 26 29 26
Dewpt            20 17 17 15 11  9  6  4  1  3  6  9  9 10  9 10 12 14 19 21 23
RH               84 74 74 74 77 84 83 91 91 83 61 57 67 87 80 84 88 88 74 72 88
Wind dir         NW NW NW NW NW NW NW NW NW NW  N NE NE  E  E  E  E  E  E  E  E
Wind spd          9  9 12 12 12 10 11  9  5  4  4  4  4  5  6  6  6  8  9  8  8
Clouds           OV OV OV B2 B1 B1 SC FW FW CL FW FW SC B1 B2 B2 B2 B1 B2 B2 OV
PoP 12hr                     30           0           0          40          40
QPF 12hr                      0           0           0        0.01           0
Snow 12hr                 00-00       00-00       00-00
Frzg rain         C                                                           C
Snow                                                        C  C  C  C  C  C  L
Wind chill       14 14 12 10  4  0 -5 -8 -8 -2 10 16 11  4  4  4  5  7 17 21 18
Min chill        14    12     4    -6    -9    -8    10     3     3     4    18
Winter Weath      Y  Y


Date               Fri 02/23/18  Sat 02/24/18  Sun 02/25/18  Mon 02/26/18
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            22    32      17    32      17    37      21    38
Temp          26   22 32 26 20   19 31 29 24   18 34 35 27   22 37 34
Dewpt         24   21 25 21 18   17 23 24 19   16 24 25 21   19 27 24
PWind dir           S    NW       N     N      NW    SW       S     W
Wind char          LT    LT      LT    LT      GN    GN      GN    GN
Avg clouds    OV   OV B1 SC SC   B1 B2 B2 B1   SC SC SC SC   SC SC SC
PoP 12hr           70     5       5    70      30     5       5     5
Frzg rain      L    C
Snow           L                     C  L  C

$$
IAZ094-202200-
Lamoni-Decatur IA
40.63N  93.90W Elev. 1125 ft
337 AM CST Tue Feb 20 2018

Date             Tue 02/20/18            Wed 02/21/18            Thu 02/22/18
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                      31          12          30          21          35
Temp             29 30 29 29 24 20 16 14 12 16 25 30 24 22 21 21 21 25 31 35 33
Dewpt            27 27 25 23 18 14 10  9  7  7  8 10 11 13 13 15 16 20 22 25 27
RH               92 88 85 78 77 77 77 80 80 67 48 42 57 68 71 77 81 81 69 66 78
Wind dir         NW NW NW NW NW NW  N  N  N  N NE NE NE NE NE NE  E  E  E  E  E
Wind spd          6 10 11 14 14 14 14 12 12 11 10 10  9 10  9 10  9  8  8  6  6
Clouds           OV OV OV OV B2 B1 SC SC FW FW FW SC B1 B2 B2 B2 OV OV B2 OV OV
PoP 12hr                     80           0           0          40          30
QPF 12hr                   0.06           0           0        0.03           0
Snow 12hr                 00-00       00-00       00-00
Frzg rain         D  L  S                                            C  S     S
Rain                                                                       S  L
Snow                                                        C  C  C  S
Wind chill       22 21 19 17 12  6  1  0 -3  3 15 21 15 12 11 10 11 17 24 29
Min chill        21    18    10     1    -3    -3    14    10    10    12    25
Winter Weath      Y  Y


Date               Fri 02/23/18  Sat 02/24/18  Sun 02/25/18  Mon 02/26/18
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    42      27    41      24    45      28    47
Temp          32   28 41 38 30   28 39 40 31   25 42 42 31   30 45 43
Dewpt         28   27 30 29 26   25 29 30 24   21 27 27 25   23 29 27
PWind dir           E     N      NE    NE      NW    SW       S     W
Wind char          LT    LT      GN    GN      GN    GN      GN    GN
Avg clouds    OV   OV B1 B1 B1   B2 B2 B2 B1   SC SC FW FW   FW SC SC
PoP 12hr           60     5      40    60      40     5       0    20
Frzg rain      L    C
Rain           L             S       C  L  C                        S
Sleet          S
Snow                         S    C  C     C

$$
IAZ017-202200-
Mason City-Cerro Gordo IA
43.16N  93.33W Elev. 1189 ft
337 AM CST Tue Feb 20 2018

Date             Tue 02/20/18            Wed 02/21/18            Thu 02/22/18
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                      25           4          21          10          28
Temp             24 24 24 22 17 13 10  7  4  8 18 21 14 10 11 11 12 15 24 28 26
Dewpt            22 19 18 16 13  9  6  5  2  3  6  9  8  9  7  9 10 13 17 21 22
RH               92 81 77 77 84 84 83 91 91 79 59 59 76 96 83 91 91 92 74 75 85
Wind dir         NW NW NW NW NW NW NW NW NW NW NW NW NE  E  E  E  E  E  E  E  E
Wind spd          9 10 13 17 16 16 14 11  9  5  4  4  5  4  6  5  6  8 10  9  9
Clouds           OV OV OV B2 B1 B1 SC FW FW CL FW FW FW SC B1 B1 B2 B1 B2 B2 OV
PoP 12hr                     30           0           0          20          40
QPF 12hr                      0           0           0           0        0.01
Snow 12hr                 00-00       00-00       00-00
Frzg rain         C
Snow                                                        S  S  C  C  C  C  L
Wind chill       14 14 12  8  2 -3 -7 -9-10 -2 11 15  6  2  0  2  1  4 14 19 17
Min chill        14    10     1    -7   -11    -9     5    -1    -1     0    16
Winter Weath      Y  Y


Date               Fri 02/23/18  Sat 02/24/18  Sun 02/25/18  Mon 02/26/18
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            22    31      15    32      16    34      19    36
Temp          25   22 31 26 18   16 30 31 24   16 31 32 23   21 35 32
Dewpt         24   22 25 21 16   16 23 25 20   16 23 25 20   18 27 24
PWind dir          SE    NW       N     N      NW    SW       S     W
Wind char          LT    LT      LT    LT      GN    GN      GN    GN
Avg clouds    OV   OV B1 SC SC   B1 B1 B2 B2   B1 SC SC SC   SC SC SC
PoP 12hr           70     5       5    70      40     5       5    10
Frzg rain           C
Snow           L    C                C  L  C

$$
IAZ049-202200-
Marshalltown-Marshall IA
42.11N  92.91W Elev. 972 ft
337 AM CST Tue Feb 20 2018

Date             Tue 02/20/18            Wed 02/21/18            Thu 02/22/18
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                      29           9          24          16          32
Temp             29 28 27 25 20 17 14 11  9 12 21 24 19 16 16 16 17 21 29 32 29
Dewpt            27 25 23 20 17 13  9  8  5  6  9 11 11 13 12 14 14 18 21 23 25
RH               92 88 85 81 88 84 80 87 83 76 59 57 70 88 84 92 88 88 72 69 85
Wind dir         NW NW NW NW NW NW NW NW  N  N  N  N NE NE NE  E  E  E  E  E  E
Wind spd          8  9 12 17 16 16 16 12 11  9  8  8  6  6  8  6  9  9 10  9  8
Clouds           OV OV OV B2 B2 B1 SC SC FW FW FW FW SC B1 B2 B2 B2 B2 B2 B2 OV
PoP 12hr                     70           0           0          40          30
QPF 12hr                   0.04           0           0        0.01        0.01
Snow 12hr                 00-00       00-00       00-00
Frzg rain         D  C                                                        L
Snow                                                        C  C  C  C  C  C  S
Wind chill       22 19 16 12  7  2 -2 -4 -7  0 11 15 10  7  6  7  7 12 20 24 20
Min chill        21    15     6    -3    -8    -6     9     5     5     7    19
Winter Weath      Y  Y


Date               Fri 02/23/18  Sat 02/24/18  Sun 02/25/18  Mon 02/26/18
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            25    35      21    36      20    38      22    40
Temp          29   26 35 32 24   22 35 34 27   20 35 36 27   23 39 36
Dewpt         27   26 28 26 21   20 27 28 23   20 25 26 23   21 29 26
PWind dir          SE    NW       N    NE      NW    SW       S    SW
Wind char          LT    LT      LT    GN      GN    GN      GN    GN
Avg clouds    OV   OV B1 SC SC   B1 B2 B2 B2   B1 SC SC SC   SC SC SC
PoP 12hr           70     5      10    70      40     5       0     5
Frzg rain      L    C
Rain                                    L
Snow           S    S                C  L  C    S

$$
IAZ086-202200-
Ottumwa-Wapello IA
41.11N  92.45W Elev. 836 ft
337 AM CST Tue Feb 20 2018

Date             Tue 02/20/18            Wed 02/21/18            Thu 02/22/18
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                      33          14          30          22          37
Temp             33 32 32 29 27 23 19 16 14 17 25 30 24 23 22 22 24 27 33 37 36
Dewpt            31 31 31 29 25 19 14 11  9  9 11 13 13 16 15 17 17 20 24 25 27
RH               92 96 96100 92 84 80 80 80 70 55 49 62 74 74 81 74 74 69 61 69
Wind dir         NW NW NW NW NW NW NW NW  N  N  N  N NE NE NE NE NE  E  E  E  E
Wind spd          6  8 11 14 13 17 16 14 12 11 10 10  8  8  9 10 10 10  9  8  8
Clouds           OV OV OV OV B2 B2 B1 SC SC FW SC SC B1 B2 B2 B2 OV B2 OV OV OV
PoP 12hr                     90           5           0          40          40
QPF 12hr                   0.14           0           0        0.01        0.01
Snow 12hr                 00-00       00-00       00-00
Frzg rain            L  L  C
Rain              D                                                     S  S  L
Snow                                                        C  C  C  C  S
Tstms
Wind chill       27 25 23 18 15  9  4  2  0  4 15 21 15 14 12 12 13 17 26 31 30
Min chill        26    22    14     3    -1     0    13    12    11    12    27


Date               Fri 02/23/18  Sat 02/24/18  Sun 02/25/18  Mon 02/26/18
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    42      27    42      25    44      27    47
Temp          32   30 41 38 30   28 40 41 33   26 42 41 31   29 46 42
Dewpt         30   29 32 30 27   25 31 32 27   22 27 28 25   24 30 28
PWind dir           E    NW       N    NE      NW     W       S    SW
Wind char          LT    LT      LT    GN      GN    GN      GN    GN
Avg clouds    OV   OV B2 B1 B1   B2 B2 B2 B1   SC SC SC SC   SC SC SC
PoP 12hr           70    10      40    60      40     5       5    20
Frzg rain      L    L
Rain           L    C        S       L  L  C                        S
Snow                         S    C  L     C    S

$$



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