Point Forecast Matrices
Issued by NWS Des Moines, IA
Issued by NWS Des Moines, IA
958 FOUS53 KDMX 181132 PFMDMX Point Forecast Matrices National Weather Service Des Moines IA 632 AM CDT Tue Aug 18 2026 IAZ060-182100- Des Moines-Polk IA 41.54N 93.65W Elev. 924 ft 632 AM CDT Tue Aug 18 2026 Date Tue 08/18/26 Wed 08/19/26 Thu 08/20/26 CDT 3hrly 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 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 80 65 79 62 81 Temp 69 73 78 80 75 71 69 67 66 71 77 79 76 69 67 64 63 71 78 81 77 Dewpt 66 68 71 73 72 70 69 67 66 68 69 68 68 66 65 64 62 66 67 68 69 RH 90 84 79 79 90 97100100100 90 76 69 76 90 93100 97 84 69 65 76 Wind dir SW W W W NW NE N NE NE NE E E E E NE E NE SE S S S Wind spd 5 6 9 8 5 2 2 3 3 4 4 4 4 3 2 1 1 2 4 4 4 Clouds B1 B1 B1 B1 SC B1 SC B1 B1 B1 SC SC SC SC SC SC SC FW FW FW FW PoP 12hr 50 30 10 20 5 QPF 12hr 0.20 0.06 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C C C C S S S Tstms C C C C S S S Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 CDT 6hrly 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 65 84 66 80 62 78 64 80 Temp 68 65 81 80 70 66 78 76 67 63 76 75 68 65 77 77 Dewpt 65 65 72 73 68 65 68 69 64 62 67 69 66 64 71 72 PWind dir S W NW N NE SE SE SE Wind char LT LT LT LT LT LT LT LT Avg clouds FW SC SC FW FW SC FW FW FW SC SC SC B1 B1 B1 SC PoP 12hr 20 20 30 5 10 20 20 10 Rain shwrs S S S S S C S S Tstms S S S S S C S $$ IAZ039-182100- Waterloo/Cedar Falls-Black Hawk IA 42.55N 92.40W Elev. 865 ft 632 AM CDT Tue Aug 18 2026 Date Tue 08/18/26 Wed 08/19/26 Thu 08/20/26 CDT 3hrly 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 78 62 77 59 78 Temp 68 73 76 77 74 69 66 64 62 69 75 77 74 66 63 61 59 70 76 78 75 Dewpt 65 67 70 71 69 68 66 64 62 65 64 63 64 62 60 59 59 63 64 65 66 RH 90 81 82 82 84 97100100100 87 69 62 71 87 90 93100 78 66 64 74 Wind dir S W W NW NW NW N NW N NE NE N NE NE SE E E S S SW S Wind spd 4 8 8 6 5 2 2 2 2 3 4 4 3 1 1 1 1 2 5 6 5 Clouds SC SC B1 B1 B1 SC B1 SC B1 SC FW SC SC SC SC SC SC FW FW FW FW PoP 12hr 40 30 5 5 5 QPF 12hr 0.23 0.02 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C C C C C S Tstms C C C C C S S Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 CDT 6hrly 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 63 81 63 77 59 76 61 77 Temp 66 63 78 77 68 63 75 74 64 60 73 73 65 62 75 74 Dewpt 64 63 69 70 66 62 65 64 60 59 64 65 63 62 67 68 PWind dir S W NW NW NW SE SE S Wind char LT LT LT LT LT LT LT LT Avg clouds FW SC SC FW FW FW FW FW FW FW SC SC B1 SC B1 SC PoP 12hr 30 30 30 5 5 10 20 10 Rain shwrs S C S C C S S Tstms S S S C C S $$ IAZ048-182100- Ames-Story IA 41.99N 93.62W Elev. 936 ft 632 AM CDT Tue Aug 18 2026 Date Tue 08/18/26 Wed 08/19/26 Thu 08/20/26 CDT 3hrly 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 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 79 64 79 61 80 Temp 70 72 76 78 75 70 68 66 64 70 76 78 75 68 65 63 61 70 77 80 76 Dewpt 66 68 71 73 72 70 68 66 64 67 68 67 68 66 64 63 61 66 67 68 69 RH 87 87 85 85 90100100100100 90 76 69 79 93 97100100 87 71 67 79 Wind dir SW W W W NW N N N N NE E E E NE E SE NE S S S S Wind spd 4 8 8 5 3 1 1 2 2 3 4 4 2 2 1 1 1 3 5 5 4 Clouds B1 B1 B1 B1 B1 B1 B1 SC B1 SC SC B1 SC SC SC SC SC FW FW FW FW PoP 12hr 50 30 10 20 5 QPF 12hr 0.23 0.04 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C C S C S S Tstms C C S S S S Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 CDT 6hrly 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 64 83 64 79 61 78 62 79 Temp 67 64 80 79 68 64 77 75 65 62 75 74 66 63 76 76 Dewpt 66 64 72 72 68 64 67 68 63 61 67 68 66 63 70 71 PWind dir S W NW N NE SE SE SE Wind char LT LT LT LT LT LT LT LT Avg clouds FW SC SC FW FW SC FW FW FW SC B1 B1 B1 B1 B1 SC PoP 12hr 20 20 30 5 10 20 20 10 Rain shwrs S S S C C S S Tstms S S S C C S $$ IAZ004-182100- Estherville-Emmet IA 43.40N 94.75W Elev. 1315 ft 632 AM CDT Tue Aug 18 2026 Date Tue 08/18/26 Wed 08/19/26 Thu 08/20/26 CDT 3hrly 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 78 57 78 58 79 Temp 69 70 75 78 75 66 62 59 57 69 75 78 74 65 62 60 59 70 77 79 76 Dewpt 66 66 68 68 67 64 61 59 57 63 62 62 63 61 59 59 59 65 66 68 68 RH 90 87 79 71 76 93 97100100 81 64 58 69 87 90 96100 84 69 69 76 Wind dir W W NW NW N N NW NW W SE S NW SE S S SW SW SW SW S S Wind spd 5 8 5 5 4 3 3 2 1 2 2 3 3 4 4 5 5 8 11 12 9 Clouds B1 B1 B1 SC SC SC FW FW SC SC B1 B1 FW SC FW FW FW FW FW FW SC PoP 12hr 40 20 20 20 30 QPF 12hr 0.06 0 0 0 0.01 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C S S S S S C C C Tstms C C S S S S S S C C Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 CDT 6hrly 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 62 81 60 78 58 77 59 79 Temp 66 62 78 78 65 60 75 75 62 59 75 74 63 60 76 76 Dewpt 64 62 68 68 61 57 62 62 57 57 64 65 62 60 67 68 PWind dir SW W NW N W S S S Wind char GN LT LT LT LT LT LT GN Avg clouds SC SC FW FW FW FW FW FW FW SC B1 SC SC SC B1 SC PoP 12hr 40 20 20 0 10 10 20 10 Rain shwrs C C S S S S Tstms C S S S S $$ IAZ035-182100- Fort Dodge-Webster IA 42.55N 94.18W Elev. 1165 ft 632 AM CDT Tue Aug 18 2026 Date Tue 08/18/26 Wed 08/19/26 Thu 08/20/26 CDT 3hrly 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 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 80 61 79 59 80 Temp 67 71 76 78 76 68 66 63 61 68 76 78 75 66 63 61 60 70 77 80 76 Dewpt 65 67 72 72 71 68 66 63 61 66 66 66 67 64 62 61 60 66 68 70 70 RH 93 87 87 82 85100100100100 93 71 67 76 93 97100100 87 74 72 82 Wind dir W SW W W NW N N NW N E E E E E S S S S S S S Wind spd 3 8 4 4 3 1 1 1 1 2 2 2 1 1 1 1 1 3 6 6 4 Clouds B1 SC B1 SC B1 B1 SC B1 B1 B1 SC SC SC B1 SC SC SC FW FW FW FW PoP 12hr 40 10 20 20 20 QPF 12hr 0.08 0.07 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C S S S S S S Tstms C C S S S S S S Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 CDT 6hrly 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 62 83 62 79 59 78 61 79 Temp 66 63 80 78 66 62 76 75 63 60 75 74 64 62 77 76 Dewpt 65 63 72 72 65 61 66 67 61 59 66 68 64 62 69 71 PWind dir SW W NW N NE SE SE S Wind char LT LT LT LT LT LT LT LT Avg clouds SC SC SC FW FW FW SC FW SC SC B1 B1 B1 B1 B1 SC PoP 12hr 40 10 30 5 10 20 20 10 Rain shwrs S C C S S Tstms S S C S $$ IAZ094-182100- Lamoni-Decatur IA 40.63N 93.90W Elev. 1125 ft 632 AM CDT Tue Aug 18 2026 Date Tue 08/18/26 Wed 08/19/26 Thu 08/20/26 CDT 3hrly 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 81 66 79 63 80 Temp 68 73 77 80 77 71 70 68 67 71 77 79 76 70 67 65 63 72 78 80 77 Dewpt 65 67 71 72 72 71 70 68 67 69 70 70 70 68 67 65 63 67 68 68 69 RH 90 81 82 77 85100100100100 93 79 74 82 93100100100 84 71 67 76 Wind dir S SW SW SW NW NE NE E NE NE E E NE NE E NE NE NE E SE SE Wind spd 5 6 8 8 4 4 4 3 3 5 5 5 4 3 3 2 2 3 3 3 2 Clouds SC B1 B1 SC SC SC OV OV B1 B1 SC FW FW SC SC SC SC FW FW FW FW PoP 12hr 50 50 10 20 5 QPF 12hr 0.28 0.23 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C C S C C C S S Tstms S S S C S S S Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 CDT 6hrly 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 64 83 66 82 63 79 65 81 Temp 68 65 81 80 70 66 80 78 67 64 77 77 68 65 79 79 Dewpt 66 65 71 72 69 66 68 69 65 62 67 69 66 64 71 72 PWind dir S SW W N NE SE SE SE Wind char LT LT LT LT LT LT GN GN Avg clouds FW FW SC FW FW SC FW FW FW SC SC B1 B1 B1 B1 SC PoP 12hr 5 20 20 10 10 20 30 20 Rain shwrs S S S S S S C S Tstms S S S S S S $$ IAZ017-182100- Mason City-Cerro Gordo IA 43.16N 93.33W Elev. 1189 ft 632 AM CDT Tue Aug 18 2026 Date Tue 08/18/26 Wed 08/19/26 Thu 08/20/26 CDT 3hrly 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 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 77 58 77 57 79 Temp 69 71 75 76 74 67 63 60 59 68 75 76 74 65 62 59 58 69 76 78 75 Dewpt 65 67 69 69 68 65 63 60 59 63 61 60 62 61 59 58 58 63 65 66 66 RH 87 87 82 79 82 93100100100 84 62 58 66 87 90 96100 81 69 67 74 Wind dir SW W N NW NW NW NW N N E NE N NE S S SW SW S SW S S Wind spd 8 9 4 4 4 2 2 1 1 2 2 2 1 2 2 2 1 4 8 9 6 Clouds B1 SC B1 B1 B1 SC SC SC SC FW SC SC B1 SC FW SC FW FW FW FW SC PoP 12hr 40 40 5 10 20 QPF 12hr 0.06 0.01 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C S S C C S S C Tstms C C S S S S S S Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 CDT 6hrly 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 61 81 60 77 57 76 59 77 Temp 65 62 78 77 65 60 75 74 62 58 74 73 62 61 75 75 Dewpt 64 62 68 68 63 60 62 62 58 58 63 64 62 61 67 67 PWind dir SW W NW N NW SE SE S Wind char LT LT LT LT LT LT LT LT Avg clouds SC SC SC FW FW FW FW FW FW SC SC SC B1 SC B1 SC PoP 12hr 50 20 30 5 10 10 20 10 Rain shwrs C C S S C S Tstms S S S C $$ IAZ049-182100- Marshalltown-Marshall IA 42.11N 92.91W Elev. 972 ft 632 AM CDT Tue Aug 18 2026 Date Tue 08/18/26 Wed 08/19/26 Thu 08/20/26 CDT 3hrly 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 79 62 79 58 79 Temp 69 73 76 78 74 68 66 64 62 69 75 78 74 66 63 60 59 70 76 79 75 Dewpt 65 67 70 71 70 68 66 64 62 66 66 65 66 63 61 60 59 64 65 66 67 RH 87 81 82 79 87100100100100 90 74 64 76 90 93100100 81 69 64 76 Wind dir SW W W W NW N N N NE NE NE NE NE NE E E NE SE S S S Wind spd 5 8 8 6 4 2 2 2 2 3 2 3 2 2 1 0 0 2 3 4 3 Clouds B1 SC B1 B1 SC SC SC SC B1 B1 SC SC SC SC SC SC SC FW FW FW FW PoP 12hr 40 30 10 10 5 QPF 12hr 0.16 0.04 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C C C C C Tstms C C C C C S Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 CDT 6hrly 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 62 82 62 79 58 77 60 79 Temp 66 63 79 77 67 63 76 74 63 60 75 73 64 61 76 74 Dewpt 64 63 70 70 65 62 65 66 60 59 65 66 63 61 68 69 PWind dir S W NW N N SE SE SE Wind char LT LT LT LT LT LT LT LT Avg clouds FW SC SC FW FW SC FW FW FW SC SC B1 B1 B1 B1 SC PoP 12hr 20 20 20 5 10 20 20 10 Rain shwrs S S S S S S S Tstms S S S S S S $$ IAZ086-182100- Ottumwa-Wapello IA 41.11N 92.45W Elev. 836 ft 632 AM CDT Tue Aug 18 2026 Date Tue 08/18/26 Wed 08/19/26 Thu 08/20/26 CDT 3hrly 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 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 81 66 80 62 80 Temp 69 75 79 81 77 71 70 68 67 72 77 80 77 69 66 64 62 72 78 80 78 Dewpt 66 67 72 73 72 71 70 68 67 70 70 70 70 67 66 64 62 67 67 67 69 RH 90 76 79 77 85100100100100 93 79 72 79 93100100100 84 69 65 74 Wind dir SW W SW W W N N N NE NE NE NE NE E E E NE E E SE SE Wind spd 4 9 9 8 4 3 3 3 2 3 4 4 3 3 2 2 1 2 2 2 2 Clouds B1 B1 B1 SC B1 SC B1 B2 B1 B2 SC SC SC SC SC SC SC FW FW CL FW PoP 12hr 40 40 5 10 5 QPF 12hr 0.15 0.12 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C C C C S Tstms S C C C S S Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 CDT 6hrly 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 64 83 66 81 62 79 64 80 Temp 68 65 80 80 70 66 78 78 66 63 77 76 67 64 78 78 Dewpt 66 65 72 73 69 66 70 70 65 63 68 70 66 64 71 73 PWind dir S SW W NW N E SE SE Wind char LT LT LT LT LT LT LT GN Avg clouds FW FW SC FW FW SC FW FW FW FW SC B1 B1 SC B1 SC PoP 12hr 10 20 30 5 5 10 20 20 Rain shwrs S S S C S S Tstms S S S C $$