Point Forecast Matrices
Issued by NWS Des Moines, IA
Issued by NWS Des Moines, IA
595 FOUS53 KDMX 200817 PFMDMX Point Forecast Matrices National Weather Service Des Moines IA 317 AM CDT Thu Aug 20 2026 IAZ060-202100- Des Moines-Polk IA 41.54N 93.65W Elev. 924 ft 317 AM 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 85 65 81 Temp 64 64 71 79 82 79 72 70 68 67 76 83 85 81 73 69 67 65 73 79 81 77 Dewpt 63 63 66 67 67 69 66 66 66 66 70 71 70 70 68 66 64 63 66 65 64 66 RH 97 97 84 67 61 72 81 87 93 97 82 67 61 69 84 90 90 93 79 62 56 69 Wind dir NE NE SE SE S S S S S SW W W NW NW N N NW W NW NW N N Wind spd 3 3 2 4 5 4 4 5 5 5 6 8 8 4 4 3 3 3 4 8 9 5 Clouds CL FW SC CL FW FW FW FW FW FW FW CL CL CL SC SC SC FW FW CL CL FW PoP 12hr 0 5 10 20 5 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S S S Tstms S S S S Heat index 88 Max heat 82 86 90 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 61 78 63 78 64 83 66 82 Temp 65 61 76 74 65 63 76 76 67 65 80 80 70 66 80 79 Dewpt 61 58 61 64 61 60 65 67 64 63 68 71 67 65 68 70 PWind dir N NE SE SE SE SW W NW Wind char LT LT LT LT LT LT LT LT Avg clouds FW SC SC SC B1 B1 B1 SC SC SC SC FW SC SC SC SC PoP 12hr 0 5 20 20 10 10 20 10 Rain shwrs S S S S Tstms S S S $$ IAZ039-202100- Waterloo/Cedar Falls-Black Hawk IA 42.55N 92.40W Elev. 865 ft 317 AM CDT Thu Aug 20 2026 Date Thu 08/20/26 Fri 08/21/26 Sat 08/22/26 CDT 3hrly 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 81 65 82 63 78 Temp 60 60 70 79 81 77 70 68 66 66 73 80 82 78 70 66 64 63 71 76 78 74 Dewpt 58 57 62 63 64 66 65 64 65 65 68 69 66 67 64 62 61 60 63 63 61 61 RH 93 90 76 58 56 69 84 87 97 97 84 69 58 69 81 87 90 90 76 64 56 64 Wind dir NE NE SE S S S S S SW SW SW W NW NW NW NW N NW NW NW NW NW Wind spd 2 2 3 4 8 6 5 6 6 6 9 9 11 8 5 4 4 4 6 11 12 8 Clouds CL FW FW FW SC SC FW FW SC FW FW CL SC FW FW FW FW FW FW CL CL CL PoP 12hr 0 20 10 5 0 QPF 12hr 0 0.03 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S Tstms S S Date Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 CDT 6hrly 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 58 76 59 75 62 80 64 80 Temp 62 58 73 73 62 59 73 73 64 62 77 77 67 64 77 76 Dewpt 56 54 58 61 58 57 62 64 62 61 67 68 64 62 67 67 PWind dir N N SE SE SE SW W NW Wind char LT LT LT LT LT LT LT LT Avg clouds FW FW SC SC SC B1 SC SC SC SC B1 SC SC SC SC SC PoP 12hr 0 0 5 10 20 20 20 10 Rain shwrs S S S S Tstms S S $$ IAZ048-202100- Ames-Story IA 41.99N 93.62W Elev. 936 ft 317 AM 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 84 64 80 Temp 62 62 71 78 81 79 71 69 67 66 75 82 84 80 71 68 65 64 72 78 80 76 Dewpt 60 61 65 66 67 69 68 67 66 66 69 70 69 70 67 65 63 62 65 65 63 65 RH 93 97 81 67 63 72 90 93 97100 82 67 61 72 87 90 93 93 79 64 56 69 Wind dir N NE SE S S S S S SW SW W W NW NW N N N NW NW NW N N Wind spd 3 2 3 4 6 4 4 4 5 5 6 6 8 3 3 2 2 2 4 8 9 4 Clouds CL FW FW CL CL FW FW SC FW FW CL CL FW CL FW FW FW FW CL CL FW FW PoP 12hr 0 10 5 20 5 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S Tstms S S Obvis PF 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 59 77 61 77 63 82 64 81 Temp 63 59 75 74 64 62 75 75 66 64 79 79 68 65 79 78 Dewpt 59 56 61 64 61 60 65 67 65 62 69 71 66 64 68 70 PWind dir N E SE SE SE SW W NW Wind char LT LT LT LT LT LT LT LT Avg clouds FW SC SC SC B1 B1 B1 SC SC SC SC SC SC SC SC SC PoP 12hr 0 5 10 20 10 20 20 10 Rain shwrs S S S S Tstms S S $$ IAZ004-202100- Estherville-Emmet IA 43.40N 94.75W Elev. 1315 ft 317 AM CDT Thu Aug 20 2026 Date Thu 08/20/26 Fri 08/21/26 Sat 08/22/26 CDT 3hrly 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 81 62 81 60 78 Temp 57 59 72 79 81 78 69 66 64 62 72 78 80 78 66 64 62 60 70 75 78 75 Dewpt 55 56 63 65 67 68 67 65 62 60 63 63 62 64 60 58 57 56 61 59 57 58 RH 93 90 73 62 63 71 93 97 93 93 73 60 54 62 81 81 84 87 73 58 48 55 Wind dir SW S SW SW S SW SW SW W W NW N N N N NW NW NW N N N N Wind spd 3 4 10 13 16 11 10 8 8 6 8 9 9 5 4 4 4 6 9 11 10 6 Clouds CL FW FW SC SC SC FW FW FW CL CL CL CL FW FW FW FW FW FW CL FW FW PoP 12hr 20 20 0 5 0 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S Tstms S S Obvis PF Date Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 CDT 6hrly 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 55 77 59 78 61 81 61 80 Temp 59 55 74 74 61 59 75 76 64 62 79 78 66 62 77 77 Dewpt 52 51 56 60 57 56 63 65 62 60 65 66 61 59 63 64 PWind dir N SE SE S S W NW NW Wind char LT LT LT GN GN GN LT GN Avg clouds FW SC SC SC SC B1 B1 SC SC SC SC SC SC SC SC SC PoP 12hr 0 5 30 20 20 10 20 5 Rain shwrs C S S S S Tstms S S S $$ IAZ035-202100- Fort Dodge-Webster IA 42.55N 94.18W Elev. 1165 ft 317 AM 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 64 83 61 80 Temp 59 60 70 78 81 79 70 67 65 64 73 80 82 79 69 65 63 61 70 77 80 75 Dewpt 58 59 65 67 69 70 68 66 65 64 68 68 67 68 64 62 60 59 64 63 62 63 RH 96 96 84 69 67 74 93 97100100 84 67 61 69 84 90 90 93 81 62 54 66 Wind dir NE E S S S S S SW SW SW W NW NW N N N NW NW N N N N Wind spd 2 1 3 6 10 6 4 4 4 4 4 5 5 3 2 2 2 2 4 6 8 3 Clouds CL SC FW FW FW SC FW SC FW CL CL CL CL CL FW FW FW FW CL CL FW FW PoP 12hr 0 20 0 5 0 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Obvis PF 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 77 62 82 62 81 Temp 60 56 75 74 62 60 74 74 64 62 79 78 66 63 78 77 Dewpt 56 54 60 63 59 58 65 67 63 61 69 70 64 61 67 68 PWind dir N E SE SE S SW W NW Wind char LT LT LT LT LT LT LT LT Avg clouds FW SC SC SC SC B1 B2 SC SC SC B1 SC SC SC SC SC PoP 12hr 0 5 20 20 20 20 30 10 Rain shwrs S S S S C S Tstms S S $$ IAZ094-202100- Lamoni-Decatur IA 40.63N 93.90W Elev. 1125 ft 317 AM CDT Thu Aug 20 2026 Date Thu 08/20/26 Fri 08/21/26 Sat 08/22/26 CDT 3hrly 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 81 66 85 66 81 Temp 64 65 71 79 81 79 71 69 67 66 76 83 85 82 73 70 68 66 73 79 81 78 Dewpt 63 64 68 68 67 69 67 66 66 66 70 71 70 72 70 68 66 64 66 66 65 66 RH 97 97 90 69 63 72 87 90 97100 82 67 61 72 90 93 93 93 79 64 58 67 Wind dir N N E SE SE SE S S S SW SW W W NW NW N N N NE N N N Wind spd 3 3 3 3 3 2 3 4 4 4 6 6 6 3 3 3 3 3 3 5 8 6 Clouds B1 B1 SC SC FW FW FW FW SC FW FW CL CL FW SC SC SC SC FW FW FW FW PoP 12hr 0 5 5 40 10 QPF 12hr 0 0 0 0.05 0.01 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C C C Tstms S C C C Obvis PF Date Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 CDT 6hrly 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 61 79 63 79 65 83 66 83 Temp 66 61 77 75 66 64 77 77 68 65 81 80 70 67 81 80 Dewpt 62 59 61 64 62 60 65 68 65 63 68 70 68 65 67 69 PWind dir NE E SE SE SE SW W NW Wind char LT LT LT GN LT LT LT LT Avg clouds FW SC B1 B1 B1 B2 B1 SC FW SC SC SC SC SC B1 SC PoP 12hr 0 10 30 20 10 5 20 10 Rain shwrs S C S S Tstms S S S $$ IAZ017-202100- Mason City-Cerro Gordo IA 43.16N 93.33W Elev. 1189 ft 317 AM 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 63 81 60 78 Temp 57 59 71 79 81 77 69 66 65 63 72 79 80 77 68 64 62 60 70 76 78 75 Dewpt 55 56 61 63 64 66 66 65 64 63 66 64 63 63 61 59 58 58 61 59 56 57 RH 93 90 71 58 56 69 90 97 97100 81 60 56 62 78 84 87 93 73 56 47 54 Wind dir NE SE S S S S S SW SW W W NW NW NW NW NW NW NW N NW NW N Wind spd 2 1 5 9 12 9 8 8 8 5 8 10 11 5 3 2 3 4 8 11 11 5 Clouds CL FW CL FW B1 FW SC SC SC FW FW CL FW CL FW FW FW FW FW FW CL CL PoP 12hr 5 20 0 5 0 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S Tstms S Obvis PF 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 57 77 60 81 62 81 Temp 60 55 74 74 61 59 74 74 64 61 79 78 66 63 78 77 Dewpt 53 52 55 58 57 56 60 63 61 61 65 65 62 61 64 64 PWind dir N E SE SE S SW W NW Wind char LT LT LT GN LT GN LT LT Avg clouds CL SC SC SC SC B1 B1 SC SC SC B1 SC SC SC SC FW PoP 12hr 0 5 20 20 30 20 20 10 Rain shwrs S S C S S S S Tstms S S S $$ IAZ049-202100- Marshalltown-Marshall IA 42.11N 92.91W Elev. 972 ft 317 AM CDT Thu Aug 20 2026 Date Thu 08/20/26 Fri 08/21/26 Sat 08/22/26 CDT 3hrly 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 82 64 84 62 80 Temp 61 62 70 79 81 77 69 67 66 64 73 81 83 78 69 66 64 62 71 77 79 74 Dewpt 59 59 63 64 64 66 65 64 64 64 68 69 67 67 64 62 61 60 64 63 62 63 RH 93 90 78 60 56 69 87 90 93100 84 67 59 69 84 87 90 93 79 62 56 69 Wind dir NE NE SE S S S S S SW SW W W NW NW NW N NW N NW NW NW N Wind spd 3 3 2 3 5 5 4 5 5 5 8 8 9 5 4 3 3 3 4 9 10 5 Clouds CL FW FW FW FW SC FW SC SC SC FW CL FW FW FW FW FW FW FW CL CL CL PoP 12hr 0 5 10 10 0 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Date Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 CDT 6hrly 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 57 77 59 77 61 82 63 81 Temp 62 57 74 73 62 60 74 73 64 62 78 77 67 64 78 76 Dewpt 57 54 59 62 58 57 63 64 62 60 67 69 64 62 67 68 PWind dir N NE SE SE SE SW W NW Wind char LT LT LT LT LT LT LT LT Avg clouds FW SC SC SC SC B1 B1 SC SC SC B1 SC SC SC SC SC PoP 12hr 0 0 10 10 20 10 20 10 Rain shwrs S S S Tstms S S $$ IAZ086-202100- Ottumwa-Wapello IA 41.11N 92.45W Elev. 836 ft 317 AM 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 65 81 Temp 65 65 72 79 81 79 70 68 67 67 76 82 85 82 72 69 66 65 74 79 81 78 Dewpt 64 64 68 67 67 69 67 66 66 67 71 72 71 72 69 67 65 64 67 66 66 67 RH 97 97 87 67 63 72 90 93 97100 85 72 63 72 90 93 97 97 79 64 60 69 Wind dir NE NE E E E SE SE S S SW SW W W NW NW NW N NW NW NW NW N Wind spd 4 4 3 2 2 3 4 5 5 5 8 9 9 6 5 4 4 3 4 6 9 6 Clouds FW FW FW CL CL FW FW FW FW FW FW CL SC FW SC SC SC FW FW CL CL FW PoP 12hr 0 5 20 20 5 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S Tstms S Obvis PF PF Heat index 88 90 87 Max heat 83 85 90 92 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 62 79 64 83 66 83 Temp 65 61 77 76 64 63 76 76 66 65 80 80 69 66 81 80 Dewpt 62 59 62 65 62 61 65 67 64 63 69 72 68 66 69 71 PWind dir N NE E SE SE S SW NW Wind char LT LT LT LT LT LT LT LT Avg clouds FW FW SC SC B1 B1 B1 SC SC SC B1 SC SC SC B1 SC PoP 12hr 0 5 5 20 10 10 10 10 Rain shwrs S $$