Point Forecast Matrices
Issued by NWS Des Moines, IA
Issued by NWS Des Moines, IA
814 FOUS53 KDMX 201827 PFMDMX Point Forecast Matrices National Weather Service Des Moines IA 127 PM CDT Thu Aug 20 2026 IAZ060-202100- Des Moines-Polk IA 41.54N 93.65W Elev. 924 ft 127 PM CDT Thu Aug 20 2026 Date Thu 08/20/26 Fri 08/21/26 Sat 08/22/26 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 82 67 86 66 81 Temp 82 78 72 70 69 67 76 83 86 82 74 70 68 66 73 80 81 78 Dewpt 66 68 67 66 66 66 70 72 71 71 68 66 65 64 66 66 65 65 RH 58 71 84 87 90 97 82 70 61 69 82 87 90 93 79 62 58 64 Wind dir S S S S SW SW W W NW NW N N NW NW N N N N Wind spd 5 5 4 5 5 5 8 8 9 5 4 3 3 3 4 8 10 6 Clouds FW FW FW FW FW FW CL CL CL CL CL FW SC FW FW CL CL CL PoP 12hr 0 5 0 10 5 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Heat index 89 91 87 Max heat 83 85 90 94 85 82 84 Date Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 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 60 78 62 78 64 83 67 82 Temp 65 60 76 74 65 63 75 75 67 65 80 81 70 67 79 78 Dewpt 60 57 61 63 61 60 65 67 64 63 70 72 68 65 68 68 PWind dir N NE SE SE SE S W NW Wind char LT LT LT LT LT LT LT LT Avg clouds CL FW SC SC B1 SC B1 SC FW SC B1 SC B1 B1 SC FW PoP 12hr 0 0 30 20 20 20 20 5 Rain shwrs C S S S S S S Tstms S S S S S S S $$ IAZ039-202100- Waterloo/Cedar Falls-Black Hawk IA 42.55N 92.40W Elev. 865 ft 127 PM CDT Thu Aug 20 2026 Date Thu 08/20/26 Fri 08/21/26 Sat 08/22/26 CDT 3hrly 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 81 66 83 63 79 Temp 80 77 70 68 67 66 74 81 83 78 70 67 65 63 72 77 79 75 Dewpt 63 65 65 65 65 65 69 70 68 67 64 62 61 60 64 63 61 60 RH 56 67 84 90 93 97 84 69 61 69 81 84 87 90 76 62 54 60 Wind dir S S S S S SW W W NW NW NW NW N NW NW NW NW NW Wind spd 5 5 5 6 6 6 9 9 12 9 5 4 4 4 8 12 13 9 Clouds SC FW SC B1 SC SC SC FW FW CL FW FW FW SC FW CL CL CL PoP 12hr 0 20 5 0 0 QPF 12hr 0 0.04 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S Tstms S Date Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 CDT 6hrly 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 57 76 58 76 61 80 64 80 Temp 62 57 74 73 61 59 73 73 64 63 77 78 68 65 77 76 Dewpt 55 53 57 59 57 56 62 63 61 61 67 69 66 63 66 65 PWind dir N N E SE SE SW W NW Wind char LT LT LT LT LT LT LT GN Avg clouds CL FW FW FW SC SC B1 B1 FW SC SC SC SC SC SC FW PoP 12hr 0 0 5 10 20 20 30 10 Rain shwrs S S S S C Tstms S S S $$ IAZ048-202100- Ames-Story IA 41.99N 93.62W Elev. 936 ft 127 PM CDT Thu Aug 20 2026 Date Thu 08/20/26 Fri 08/21/26 Sat 08/22/26 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 85 64 81 Temp 81 77 71 69 68 66 75 83 85 81 71 68 66 64 72 79 81 76 Dewpt 66 69 68 67 66 66 69 72 70 70 67 65 63 63 66 65 64 64 RH 60 76 90 93 93100 82 70 61 69 87 90 90 97 81 62 56 66 Wind dir S S S S SW SW W NW NW N N N NW NW N N N N Wind spd 8 5 4 5 5 4 6 8 8 4 3 3 2 3 5 9 9 5 Clouds FW FW FW SC FW FW CL CL FW CL FW FW SC FW FW CL CL CL PoP 12hr 0 10 5 5 5 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Heat index 88 90 Max heat 83 89 91 83 Date Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 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 58 78 60 77 63 82 65 81 Temp 63 58 76 74 63 61 75 75 66 64 79 80 69 66 79 77 Dewpt 59 55 60 62 60 60 65 67 64 63 70 72 68 64 67 68 PWind dir N NE SE SE SE SW W NW Wind char LT LT LT LT LT LT LT LT Avg clouds FW FW SC SC B1 SC B1 B1 FW SC B1 SC SC B1 SC FW PoP 12hr 0 0 30 20 20 20 20 5 Rain shwrs C S S S S S S Tstms S S S S S S $$ IAZ004-202100- Estherville-Emmet IA 43.40N 94.75W Elev. 1315 ft 127 PM CDT Thu Aug 20 2026 Date Thu 08/20/26 Fri 08/21/26 Sat 08/22/26 CDT 3hrly 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 82 63 82 61 78 Temp 82 77 69 67 65 63 73 79 81 78 68 64 63 61 71 76 78 75 Dewpt 64 66 67 65 63 62 65 63 63 64 61 58 57 57 61 60 58 58 RH 55 69 93 93 93 97 76 58 54 62 78 81 81 87 71 58 50 55 Wind dir SW SW S SW W W NW N N N N NW NW NW N N N N Wind spd 11 11 9 9 8 6 8 10 10 5 5 4 5 6 10 11 10 6 Clouds B1 B1 SC FW FW SC CL CL FW SC SC FW CL FW FW CL CL CL PoP 12hr 5 20 0 5 0 QPF 12hr 0 0.02 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S Tstms S S Date Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 CDT 6hrly 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 54 77 58 77 62 82 62 79 Temp 59 54 75 74 61 59 75 75 65 63 79 79 66 62 77 76 Dewpt 50 50 56 59 56 56 63 65 62 61 67 68 61 57 61 62 PWind dir N S SE S S W NW NW Wind char LT LT LT GN GN GN LT GN Avg clouds CL FW SC SC SC SC B1 SC FW SC B1 B1 SC FW FW FW PoP 12hr 0 0 30 20 20 20 10 5 Rain shwrs C S S S S Tstms S S S S S $$ IAZ035-202100- Fort Dodge-Webster IA 42.55N 94.18W Elev. 1165 ft 127 PM CDT Thu Aug 20 2026 Date Thu 08/20/26 Fri 08/21/26 Sat 08/22/26 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 82 65 85 62 80 Temp 81 77 70 68 66 65 74 82 84 80 70 66 63 62 71 78 80 76 Dewpt 66 68 68 66 65 65 69 69 67 69 64 62 60 60 65 63 62 62 RH 60 74 93 93 97100 84 65 57 69 81 87 90 93 81 60 54 62 Wind dir S S S S SW SW W NW NW N N N NW NW N N N N Wind spd 10 6 4 5 5 4 5 5 6 3 3 2 2 2 5 8 8 3 Clouds FW FW SC FW FW FW CL CL CL FW FW SC FW FW FW CL CL CL PoP 12hr 0 10 5 5 5 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Date Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 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 55 78 59 78 62 83 63 81 Temp 60 56 75 74 61 59 74 75 64 63 79 79 67 63 78 77 Dewpt 55 53 59 62 59 58 65 67 63 62 70 72 65 61 65 66 PWind dir N E SE SE S SW W NW Wind char LT LT LT LT LT LT LT LT Avg clouds CL FW SC SC B1 SC B2 SC FW SC B1 B1 SC SC SC FW PoP 12hr 0 0 30 20 20 20 10 5 Rain shwrs C S S S S Tstms S S S S S $$ IAZ094-202100- Lamoni-Decatur IA 40.63N 93.90W Elev. 1125 ft 127 PM CDT Thu Aug 20 2026 Date Thu 08/20/26 Fri 08/21/26 Sat 08/22/26 CDT 3hrly 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 82 66 85 66 82 Temp 82 79 71 68 67 66 74 82 85 82 74 70 68 66 73 79 82 78 Dewpt 67 68 67 66 66 66 70 72 71 73 70 69 66 65 67 66 66 67 RH 61 69 87 93 97100 87 72 63 74 87 97 93 97 81 64 58 69 Wind dir S S S S S SW SW W W NW NW N N N N N N N Wind spd 2 3 4 5 4 4 8 8 8 4 3 3 3 3 4 5 8 6 Clouds FW CL FW FW FW FW FW CL CL FW FW FW SC SC FW FW CL FW PoP 12hr 0 5 10 30 20 QPF 12hr 0 0 0 0.02 0.01 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C C S S Tstms S C C S Heat index 87 90 87 Max heat 83 85 88 92 84 82 85 Date Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 CDT 6hrly 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 61 79 63 79 65 83 67 83 Temp 65 61 76 76 66 63 75 77 68 65 79 81 70 67 81 79 Dewpt 62 58 60 63 61 60 65 68 65 63 70 72 70 66 68 69 PWind dir NE NE E SE SE SE NW NW Wind char LT LT LT GN LT LT LT LT Avg clouds FW FW SC B1 B2 B1 B1 B1 FW SC B1 B1 SC B1 SC SC PoP 12hr 0 0 30 30 10 20 30 20 Rain shwrs C C S S S C S S Tstms S S S S S S S $$ IAZ017-202100- Mason City-Cerro Gordo IA 43.16N 93.33W Elev. 1189 ft 127 PM CDT Thu Aug 20 2026 Date Thu 08/20/26 Fri 08/21/26 Sat 08/22/26 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 64 82 60 78 Temp 80 76 70 68 66 65 73 81 81 78 68 65 62 62 71 77 78 75 Dewpt 64 66 66 66 65 64 68 66 64 64 61 59 58 59 62 60 58 58 RH 58 71 87 93 97 97 84 60 56 62 78 81 87 90 73 56 50 55 Wind dir S S S SW SW SW W NW NW NW NW NW NW NW N N N N Wind spd 9 8 8 8 8 6 8 9 11 6 4 3 3 4 9 12 11 6 Clouds B1 SC B1 SC SC SC FW CL FW FW FW FW FW CL CL CL CL CL PoP 12hr 5 20 0 0 0 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S Tstms S Date Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 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 54 77 56 76 60 82 63 80 Temp 60 55 75 74 60 58 74 74 64 62 79 79 67 63 78 77 Dewpt 52 51 55 58 56 56 61 62 61 61 66 67 63 61 62 61 PWind dir N N SE SE S SW W NW Wind char LT LT LT LT LT GN LT GN Avg clouds CL FW FW FW SC SC B1 B1 SC SC B1 SC SC SC FW FW PoP 12hr 0 0 20 10 20 20 20 5 Rain shwrs S S S S S S Tstms S S $$ IAZ049-202100- Marshalltown-Marshall IA 42.11N 92.91W Elev. 972 ft 127 PM CDT Thu Aug 20 2026 Date Thu 08/20/26 Fri 08/21/26 Sat 08/22/26 CDT 3hrly 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 82 65 85 62 81 Temp 80 76 69 67 66 65 74 82 85 79 70 66 64 64 72 79 81 76 Dewpt 63 65 65 64 64 65 68 70 68 68 64 62 61 60 64 63 61 61 RH 56 69 87 90 93100 82 67 57 69 81 87 90 87 76 58 51 60 Wind dir S S S S S S W W NW NW N N NW NW NW N N N Wind spd 6 5 4 5 6 5 8 8 9 6 4 3 3 3 5 10 10 5 Clouds FW FW FW SC SC FW SC CL CL CL FW FW FW SC FW FW CL CL PoP 12hr 0 10 5 5 5 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Date Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 CDT 6hrly 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 56 78 58 78 61 82 64 81 Temp 61 56 75 73 61 59 74 74 64 63 78 78 68 64 79 77 Dewpt 56 53 57 59 57 57 62 64 62 61 67 70 66 63 65 65 PWind dir N N E SE SE SW SW NW Wind char LT LT LT LT LT LT LT LT Avg clouds CL FW FW SC SC SC B1 B1 FW SC B1 SC SC SC SC FW PoP 12hr 0 0 10 10 20 20 20 10 Rain shwrs S S S S S Tstms S S S S S $$ IAZ086-202100- Ottumwa-Wapello IA 41.11N 92.45W Elev. 836 ft 127 PM CDT Thu Aug 20 2026 Date Thu 08/20/26 Fri 08/21/26 Sat 08/22/26 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 82 66 85 66 82 Temp 81 78 70 68 67 67 76 83 85 83 73 70 67 66 74 79 82 79 Dewpt 66 68 67 66 66 66 71 73 73 73 70 67 65 65 67 67 66 66 RH 60 71 90 93 97 97 85 72 67 72 90 90 93 97 79 67 58 64 Wind dir E SE SE S S SW SW W W NW NW NW NW NW N N N N Wind spd 3 3 4 5 5 5 8 9 9 5 4 4 4 4 5 8 10 6 Clouds FW CL FW FW SC FW FW CL CL FW FW FW SC SC CL CL CL CL PoP 12hr 0 0 5 10 5 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Heat index 88 92 89 Max heat 82 85 89 94 84 83 85 Date Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 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 60 79 61 78 63 83 67 83 Temp 65 60 76 76 64 62 75 76 66 64 79 80 70 67 80 79 Dewpt 60 58 61 64 61 60 65 67 64 63 70 73 70 67 69 70 PWind dir N N E SE SE S SW NW Wind char LT LT LT LT LT LT LT LT Avg clouds CL FW FW FW SC SC B1 B1 FW SC SC SC SC SC SC SC PoP 12hr 0 0 5 10 20 20 30 10 Rain shwrs S S S C Tstms S S S $$