Point Forecast Matrices
Issued by NWS Des Moines, IA
Issued by NWS Des Moines, IA
083 FOUS53 KDMX 181857 PFMDMX Point Forecast Matrices National Weather Service Des Moines IA 157 PM CDT Tue Aug 18 2026 IAZ060-182100- Des Moines-Polk IA 41.54N 93.65W Elev. 924 ft 157 PM 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 82 Temp 80 78 73 71 69 67 72 77 79 76 70 67 65 63 71 79 81 80 Dewpt 71 72 71 69 68 66 68 67 66 67 65 64 62 63 66 67 67 69 RH 74 82 93 93 97 97 87 71 64 74 84 90 90100 84 67 63 69 Wind dir W W NE SE N NE NE NE NE NE NE E E SE S S S S Wind spd 8 4 3 2 3 3 4 5 4 3 3 2 1 1 3 4 5 4 Clouds SC B1 B2 B1 B1 B1 B1 B1 B1 B1 SC SC SC B1 FW CL FW FW PoP 12hr 20 20 10 5 5 QPF 12hr 0.02 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S Tstms S S Obvis PF 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 66 84 65 81 62 78 63 81 Temp 70 66 81 80 70 66 79 77 67 63 75 75 67 64 78 78 Dewpt 66 65 71 71 67 64 67 67 62 60 65 66 63 63 68 70 PWind dir S W NW N NE SE SE SE Wind char LT LT LT LT LT LT LT LT Avg clouds FW SC FW FW FW FW SC FW FW SC SC B1 B1 SC SC SC PoP 12hr 30 20 20 5 5 20 20 20 Rain shwrs C S S S S S S S S Tstms S S S S S S $$ IAZ039-182100- Waterloo/Cedar Falls-Black Hawk IA 42.55N 92.40W Elev. 865 ft 157 PM CDT Tue Aug 18 2026 Date Tue 08/18/26 Wed 08/19/26 Thu 08/20/26 CDT 3hrly 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 82 62 78 58 79 Temp 80 77 72 69 65 62 69 75 78 75 68 64 61 60 70 77 79 76 Dewpt 70 69 68 66 63 62 64 63 63 64 62 60 59 59 64 66 66 67 RH 72 76 87 90 93100 84 66 60 69 81 87 93 96 81 69 64 74 Wind dir W W NW NW NW N NE N N N NE SE SE S S SW SW S Wind spd 9 5 3 2 3 3 3 5 4 2 1 1 1 1 3 6 8 5 Clouds B1 OV B1 B1 B1 B1 SC SC SC SC FW FW FW FW CL FW FW SC PoP 12hr 40 30 5 5 5 QPF 12hr 0.05 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C S Tstms C C S Obvis PF PF Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 CDT 6hrly 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 64 81 62 77 58 75 60 78 Temp 68 65 78 77 67 63 75 74 63 60 73 72 64 61 75 75 Dewpt 65 64 70 69 64 62 64 63 58 57 62 63 61 60 66 67 PWind dir S W NW NW N SE SE S Wind char LT GN LT GN LT LT LT LT Avg clouds SC SC SC FW FW FW FW FW FW SC SC SC B1 SC B1 SC PoP 12hr 40 20 20 0 5 10 20 10 Rain shwrs S C S S S S S Tstms S C S S S S $$ IAZ048-182100- Ames-Story IA 41.99N 93.62W Elev. 936 ft 157 PM 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 64 80 60 82 Temp 79 77 72 69 66 64 70 77 79 76 68 65 63 61 70 77 80 79 Dewpt 71 72 70 68 66 64 67 67 65 67 65 63 62 61 66 68 68 69 RH 77 85 93 97100100 90 71 62 74 90 93 97100 87 74 67 72 Wind dir W NW NW NW N N NE NE N NE E E E SE S S S S Wind spd 8 3 2 1 2 3 3 4 4 2 2 1 0 1 3 5 5 3 Clouds B1 B2 B2 B1 B1 B1 B1 SC SC SC FW FW FW SC FW FW SC FW PoP 12hr 20 20 10 5 5 QPF 12hr 0 0 0.02 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S S S Tstms S S S Obvis PF 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 84 64 80 60 77 61 81 Temp 69 65 81 79 68 64 78 76 65 61 74 74 65 62 77 78 Dewpt 66 65 71 71 66 63 66 66 62 59 64 66 64 62 68 70 PWind dir S W NW N NE SE SE SE Wind char LT LT LT LT LT LT LT LT Avg clouds SC SC FW FW FW FW SC FW FW SC B1 B1 B1 B1 SC SC PoP 12hr 30 20 20 5 5 20 20 20 Rain shwrs S C S S S S S S S Tstms S C S S S $$ IAZ004-182100- Estherville-Emmet IA 43.40N 94.75W Elev. 1315 ft 157 PM CDT Tue Aug 18 2026 Date Tue 08/18/26 Wed 08/19/26 Thu 08/20/26 CDT 3hrly 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 82 58 79 59 81 Temp 80 76 69 64 61 59 69 75 77 76 66 63 61 60 71 78 79 78 Dewpt 66 66 64 61 58 56 61 61 61 63 61 60 59 60 66 67 68 68 RH 62 71 84 90 90 90 76 62 58 64 84 90 93100 84 69 69 71 Wind dir W NW N N N NE SE SW NW N S SW SW SW SW SW SW SW Wind spd 8 4 3 3 3 2 3 3 4 4 4 5 5 6 9 12 12 10 Clouds B1 B2 B2 SC SC B1 SC SC SC SC FW FW FW SC FW FW SC SC PoP 12hr 30 20 10 5 30 QPF 12hr 0.01 0 0 0 0.01 Snow 12hr 00-00 00-00 00-00 Rain shwrs C S C C C Tstms C S C C Obvis PF Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 CDT 6hrly 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 62 81 60 78 57 77 59 80 Temp 66 62 79 78 65 60 75 75 62 58 74 74 63 60 77 78 Dewpt 64 62 66 66 60 57 61 60 55 55 61 63 59 58 66 67 PWind dir SW NW NW N E S S S Wind char GN LT LT GN LT GN GN GN Avg clouds SC FW FW FW CL FW FW FW FW SC B1 B1 B1 SC B1 SC PoP 12hr 40 10 10 0 5 20 20 5 Rain shwrs C S S S Tstms C S $$ IAZ035-182100- Fort Dodge-Webster IA 42.55N 94.18W Elev. 1165 ft 157 PM 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 61 80 59 82 Temp 80 78 70 67 64 61 69 76 79 76 67 63 61 61 69 78 80 78 Dewpt 69 70 68 66 63 61 64 64 64 66 64 62 60 61 66 68 70 70 RH 69 76 93 97 97100 84 66 60 71 90 97 97100 90 71 72 76 Wind dir W W NW N N NE NE N NE NW SE S S S S S S S Wind spd 9 3 2 2 2 2 2 2 2 1 2 1 1 1 4 6 8 4 Clouds B1 B2 B2 B1 B1 B2 B1 SC SC SC FW FW SC B1 FW FW FW SC PoP 12hr 20 20 10 5 20 QPF 12hr 0 0 0.05 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S S S C Tstms S S S S 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 63 83 62 80 58 77 60 81 Temp 67 63 80 79 66 62 77 75 62 59 73 74 64 61 76 78 Dewpt 65 63 71 70 63 61 65 65 59 57 64 66 62 61 68 70 PWind dir SW W NW N NE SE SE S Wind char LT LT LT LT LT LT LT LT Avg clouds SC SC FW FW FW FW SC FW FW SC B2 B1 B1 SC B1 SC PoP 12hr 40 20 20 5 5 20 20 10 Rain shwrs C C S S S S S Tstms C S S S S S $$ IAZ094-182100- Lamoni-Decatur IA 40.63N 93.90W Elev. 1125 ft 157 PM CDT Tue Aug 18 2026 Date Tue 08/18/26 Wed 08/19/26 Thu 08/20/26 CDT 3hrly 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 81 67 81 63 82 Temp 79 79 73 71 69 68 72 78 79 77 70 68 65 64 72 79 81 80 Dewpt 70 71 70 70 69 68 70 70 69 68 67 66 64 63 67 67 67 68 RH 74 77 90 97100100 93 76 72 74 90 93 97 97 84 67 63 67 Wind dir W NW E NE NE NE NE NE NE NE NE NE NE E SE SE SE SE Wind spd 8 3 3 3 3 3 5 5 5 4 3 3 2 2 3 4 4 2 Clouds SC SC B1 B2 OV B2 B2 B1 SC SC SC SC B1 B1 FW FW CL FW PoP 12hr 20 20 40 10 0 QPF 12hr 0 0.02 0.08 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S S S S S C Tstms S S S S Obvis PF Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 CDT 6hrly 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 65 85 66 84 63 81 65 84 Temp 69 66 82 80 69 66 81 80 68 64 78 77 69 65 81 81 Dewpt 66 65 69 69 68 65 66 67 64 61 64 65 64 63 68 69 PWind dir S W N N NE SE SE SE Wind char LT LT LT LT LT LT GN GN Avg clouds FW SC FW FW FW SC SC FW FW SC B1 B1 B1 B1 SC SC PoP 12hr 5 10 30 20 5 20 30 20 Rain shwrs S C S S S S C S Tstms S C S S S $$ IAZ017-182100- Mason City-Cerro Gordo IA 43.16N 93.33W Elev. 1189 ft 157 PM 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 58 78 58 80 Temp 79 77 70 65 61 59 69 75 77 75 66 63 60 59 71 77 78 76 Dewpt 67 68 65 63 59 57 61 60 61 62 61 60 59 59 65 66 66 67 RH 67 74 84 93 93 93 76 60 58 64 84 90 96100 81 69 67 74 Wind dir W NW NW NW N NE E NE N SW SE S S S SW SW SW S Wind spd 8 4 2 2 2 1 2 2 2 1 2 2 2 2 5 9 10 6 Clouds B1 B2 B1 B1 SC B1 SC SC SC FW FW FW FW FW FW FW SC SC PoP 12hr 40 20 5 5 20 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C S S S C Tstms C S S 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 61 81 60 77 55 75 58 78 Temp 66 62 78 77 66 61 75 74 61 57 73 73 63 59 76 76 Dewpt 64 62 68 67 62 60 62 61 55 55 61 62 60 59 65 66 PWind dir SW W NW N N SE SE S Wind char LT LT LT LT LT LT LT LT Avg clouds SC SC FW FW FW FW FW FW FW SC B1 B1 B1 B1 B1 SC PoP 12hr 40 20 20 0 5 10 20 20 Rain shwrs C C S S S S S S Tstms C S S S S S $$ IAZ049-182100- Marshalltown-Marshall IA 42.11N 92.91W Elev. 972 ft 157 PM CDT Tue Aug 18 2026 Date Tue 08/18/26 Wed 08/19/26 Thu 08/20/26 CDT 3hrly 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 81 62 80 58 81 Temp 79 77 70 67 65 63 69 77 79 75 67 63 61 60 70 77 79 77 Dewpt 70 70 68 67 64 63 65 65 64 65 63 61 60 59 65 66 67 67 RH 74 79 93100 97100 87 67 60 71 87 93 97 96 84 69 67 71 Wind dir W NW NW N N NE NE N N E E E E SE S S S S Wind spd 9 4 2 2 3 3 3 3 3 2 1 1 0 1 2 3 4 3 Clouds B1 B2 B2 B1 SC B1 B1 SC SC SC FW FW FW FW FW FW FW FW PoP 12hr 30 20 10 5 5 QPF 12hr 0.03 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C S S Tstms C S S Obvis PF Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 CDT 6hrly 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 63 82 62 79 57 77 59 80 Temp 67 64 79 78 67 63 77 74 63 59 73 73 63 60 76 76 Dewpt 64 64 70 69 64 62 65 64 59 57 62 64 61 60 66 68 PWind dir S W NW NW N SE SE SE Wind char LT LT LT LT LT LT LT LT Avg clouds SC SC SC FW FW FW FW FW FW SC B1 B1 B1 B1 B1 SC PoP 12hr 20 20 20 5 5 20 20 20 Rain shwrs S S S S S S S Tstms S S S $$ IAZ086-182100- Ottumwa-Wapello IA 41.11N 92.45W Elev. 836 ft 157 PM 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 82 66 82 62 83 Temp 80 79 72 70 68 68 73 78 80 78 70 67 64 64 73 79 81 80 Dewpt 70 71 71 70 68 67 69 69 68 69 67 65 63 63 67 67 67 69 RH 72 77 97100100 97 87 74 67 74 90 93 97 97 81 67 63 69 Wind dir W W W N S N NE NE NE NW NE NE NE NE SE SE SE SE Wind spd 9 4 3 3 3 3 4 5 5 3 3 2 2 1 2 3 4 3 Clouds SC SC B1 B1 B2 B2 B2 B1 B1 B1 B1 SC SC SC FW CL CL FW PoP 12hr 30 30 20 5 0 QPF 12hr 0 0.03 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C S S S S S Tstms C C S S S Obvis PF PF 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 85 65 82 61 80 63 82 Temp 68 66 82 80 69 66 80 78 66 63 76 76 66 64 79 79 Dewpt 66 66 71 71 68 66 68 68 64 61 65 67 64 63 68 70 PWind dir S W NW NW N E SE SE Wind char LT LT LT LT LT LT LT LT Avg clouds FW SC SC FW FW FW SC FW FW SC SC SC B1 SC B1 SC PoP 12hr 10 30 20 10 5 20 20 20 Rain shwrs C S S S S S Tstms C S S S $$