Point Forecast Matrices
Issued by NWS Des Moines, IA
Issued by NWS Des Moines, IA
267 FOUS53 KDMX 211117 PFMDMX Point Forecast Matrices National Weather Service Des Moines IA 617 AM CDT Fri Aug 21 2026 IAZ060-212100- Des Moines-Polk IA 41.54N 93.65W Elev. 924 ft 617 AM CDT Fri Aug 21 2026 Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 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 86 65 82 60 79 Temp 67 76 83 86 83 73 70 67 65 74 80 82 78 69 65 62 60 70 76 79 75 Dewpt 65 68 71 70 69 67 65 63 63 65 65 65 64 62 60 58 57 60 60 61 62 RH 93 76 67 59 63 81 84 87 93 74 60 56 62 78 84 87 90 71 58 54 64 Wind dir SW SW W NW NW N N NW NW NW NW N N N N N N E E SE E Wind spd 4 9 9 9 5 4 3 3 3 4 8 10 5 3 2 2 1 1 3 3 3 Wind gust 19 Clouds FW FW FW FW SC FW FW FW FW CL FW FW CL CL FW FW SC SC SC SC B1 PoP 12hr 20 5 5 0 0 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S Heat index 88 91 Max heat 89 93 83 83 85 Date Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 Thu 08/27/26 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 78 64 82 66 82 64 81 Temp 66 63 75 74 67 65 79 79 70 66 79 78 68 64 79 78 Dewpt 61 61 66 66 64 64 70 71 68 65 68 68 65 62 66 68 PWind dir SE SE SE S SW NW NW NW Wind char LT LT LT LT LT LT LT LT Avg clouds B1 B2 B2 SC SC SC B1 SC SC SC SC FW FW FW FW FW PoP 12hr 30 40 10 10 30 20 5 5 Rain shwrs C C S C S S Tstms S S S C S $$ IAZ039-212100- Waterloo/Cedar Falls-Black Hawk IA 42.55N 92.40W Elev. 865 ft 617 AM CDT Fri Aug 21 2026 Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 CDT 3hrly 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 84 62 79 57 77 Temp 66 74 81 83 78 70 67 64 62 72 78 79 75 66 62 59 57 68 75 77 74 Dewpt 64 68 70 68 66 64 62 61 60 64 63 61 60 57 55 54 53 58 58 57 59 RH 93 82 69 61 67 81 84 90 93 76 60 54 60 73 78 83 86 70 55 50 59 Wind dir S W W NW NW NW NW NW NW NW NW NW NW NW N N N NE NW NW NE Wind spd 5 9 10 12 9 5 4 4 4 8 12 13 9 5 4 3 2 2 3 3 2 Clouds SC SC FW FW CL FW FW FW CL CL CL CL CL CL CL FW FW FW FW FW SC PoP 12hr 20 5 0 0 0 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S Tstms S Date Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 Thu 08/27/26 CDT 6hrly 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 58 75 61 80 64 80 61 79 Temp 62 59 73 73 64 62 78 77 68 64 78 76 65 61 77 76 Dewpt 57 57 62 62 61 62 67 68 66 64 66 65 62 60 65 65 PWind dir SE SE SE S SW NW NW NW Wind char LT LT LT LT LT GN LT LT Avg clouds SC B1 B1 B1 SC SC B1 SC SC SC SC FW FW FW FW SC PoP 12hr 5 30 20 20 40 10 10 5 Rain shwrs C S S S C C Tstms S C S $$ IAZ048-212100- Ames-Story IA 41.99N 93.62W Elev. 936 ft 617 AM CDT Fri Aug 21 2026 Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 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 86 63 81 58 78 Temp 66 75 82 85 81 71 68 65 63 73 79 81 77 67 63 60 58 68 76 78 75 Dewpt 65 68 70 69 69 66 64 62 62 65 65 64 64 60 58 56 55 60 60 60 63 RH 97 79 67 59 67 84 87 90 97 76 62 56 64 78 84 87 90 76 58 54 66 Wind dir SW W W NW NW N N NW NW NW NW N N N N N N E E SE SE Wind spd 5 9 8 9 4 3 3 3 3 5 9 10 4 3 2 1 1 1 2 2 1 Wind gust 19 Clouds SC FW FW FW SC FW FW FW FW FW FW CL CL CL FW FW SC SC SC SC B1 PoP 12hr 20 5 5 0 0 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S Heat index 90 Max heat 86 91 83 Date Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 Thu 08/27/26 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 77 62 82 64 82 62 81 Temp 64 62 74 74 66 64 79 79 68 65 80 78 66 62 79 78 Dewpt 60 60 65 66 64 64 70 71 67 65 67 68 64 61 66 68 PWind dir SE SE SE S SW NW NW NW Wind char LT LT LT LT LT LT LT LT Avg clouds B1 B2 B2 SC SC SC B1 SC B1 B1 SC FW FW SC FW FW PoP 12hr 30 40 10 10 40 10 5 5 Rain shwrs C C C C Tstms S S C S $$ IAZ004-212100- Estherville-Emmet IA 43.40N 94.75W Elev. 1315 ft 617 AM CDT Fri Aug 21 2026 Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 CDT 3hrly 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 81 60 78 53 77 Temp 63 72 79 81 78 67 64 62 61 71 76 78 75 63 59 56 54 69 75 77 75 Dewpt 62 63 63 64 64 60 58 57 57 61 60 58 58 54 51 50 50 56 57 58 59 RH 97 73 58 56 62 78 81 84 87 71 58 50 55 72 75 80 86 63 54 52 58 Wind dir W NW N N N N NW NW NW N N N N N N N E S S S SE Wind spd 6 9 10 10 5 5 4 5 6 9 10 10 6 4 3 2 1 1 2 3 4 Clouds SC FW FW SC FW FW FW FW CL CL CL CL CL CL FW SC SC SC SC SC B1 PoP 12hr 5 0 0 0 0 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Date Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 Thu 08/27/26 CDT 6hrly 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 58 76 60 81 62 80 58 79 Temp 62 59 73 74 64 62 79 78 66 62 77 76 63 58 77 76 Dewpt 57 57 63 64 62 61 68 68 62 59 62 62 58 57 62 62 PWind dir SE S S SW W NW NW N Wind char LT GN GN GN GN GN LT LT Avg clouds B1 B2 B1 B1 SC SC B1 SC SC FW FW FW FW FW FW SC PoP 12hr 40 50 20 20 20 5 5 5 Rain shwrs C C S S S Tstms S S S S S $$ IAZ035-212100- Fort Dodge-Webster IA 42.55N 94.18W Elev. 1165 ft 617 AM CDT Fri Aug 21 2026 Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 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 85 61 81 55 79 Temp 65 75 81 84 80 69 65 63 62 72 79 80 76 65 60 57 55 68 76 79 75 Dewpt 64 68 68 67 67 63 61 60 59 64 63 62 62 57 55 54 53 59 59 60 62 RH 97 79 65 57 65 81 87 90 90 76 58 54 62 75 84 90 93 73 56 52 64 Wind dir SW W NW NW N N N NW NW N N N N N N N N N SE N SE Wind spd 5 6 6 6 4 3 2 2 3 5 8 8 4 2 1 1 0 0 1 0 1 Clouds FW FW CL FW FW FW FW FW FW FW CL CL CL CL FW SC SC SC SC SC B1 PoP 12hr 5 5 0 0 0 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Date Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 Thu 08/27/26 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 83 63 82 59 81 Temp 62 60 74 73 64 62 79 79 67 63 79 77 64 60 78 77 Dewpt 59 59 65 66 63 62 70 71 65 62 66 66 61 59 64 67 PWind dir SE SE SE SW W NW NW N Wind char LT LT LT LT LT LT LT LT Avg clouds B1 B2 B2 B1 SC SC B1 SC SC SC SC FW FW FW SC SC PoP 12hr 40 40 20 30 30 10 5 5 Rain shwrs C C S S C C C Tstms S S S S S S $$ IAZ094-212100- Lamoni-Decatur IA 40.63N 93.90W Elev. 1125 ft 617 AM CDT Fri Aug 21 2026 Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 CDT 3hrly 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 86 65 82 61 79 Temp 65 76 82 86 82 73 70 67 65 74 80 82 78 70 66 63 61 70 76 79 76 Dewpt 64 68 70 70 70 69 67 65 64 66 65 65 66 64 62 59 58 60 60 61 63 RH 97 76 67 59 67 87 90 93 97 76 60 56 67 81 87 87 90 71 58 54 64 Wind dir SW SW W W NW NW NE N NW N N N N NE NE NE NE E E E E Wind spd 4 8 9 6 4 3 3 3 3 3 5 8 5 4 3 3 2 2 2 3 4 Wind gust 19 Clouds FW FW FW FW FW FW FW SC FW FW FW CL FW FW FW SC SC SC B1 B1 B2 PoP 12hr 10 10 10 0 0 QPF 12hr 0 0.01 0 0 0 Snow 12hr 00-00 00-00 00-00 Heat index 91 Max heat 87 92 85 83 85 81 Date Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 Thu 08/27/26 CDT 6hrly 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 63 79 64 82 66 82 64 83 Temp 67 63 75 75 67 65 79 79 70 66 80 79 68 64 80 79 Dewpt 61 61 66 67 65 64 70 71 69 65 68 69 66 62 66 67 PWind dir SE SE E SE SE NW NW N Wind char LT GN LT LT LT LT LT LT Avg clouds B1 B2 B2 SC SC SC B1 SC SC B1 SC SC FW SC SC SC PoP 12hr 40 50 5 10 30 20 10 10 Rain shwrs C C S C S S Tstms C C C S $$ IAZ017-212100- Mason City-Cerro Gordo IA 43.16N 93.33W Elev. 1189 ft 617 AM CDT Fri Aug 21 2026 Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 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 59 78 54 77 Temp 65 73 79 80 77 68 64 62 60 71 77 77 74 64 59 56 54 67 75 77 74 Dewpt 64 67 66 65 64 61 59 59 59 63 61 58 58 54 52 52 52 57 56 56 58 RH 97 81 64 60 64 78 84 90 96 76 58 52 57 70 78 86 93 70 52 48 57 Wind dir SW W NW NW NW NW NW NW NW N N N NW N N N NE S NW W E Wind spd 6 8 10 11 8 4 3 3 5 8 11 11 6 4 3 2 1 1 3 2 1 Clouds FW FW FW FW FW FW FW FW CL FW CL CL CL CL FW SC SC SC FW SC SC PoP 12hr 10 5 0 0 0 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs Date Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 Thu 08/27/26 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 76 59 81 62 80 59 80 Temp 60 58 73 73 63 62 79 78 66 63 78 76 63 59 77 76 Dewpt 56 57 61 62 61 61 67 67 63 62 63 62 59 59 62 62 PWind dir SE SE S SW W NW NW N Wind char LT LT LT LT LT GN LT LT Avg clouds SC B2 B2 B1 SC B1 B1 SC SC SC FW FW FW FW FW FW PoP 12hr 20 20 20 30 30 10 5 5 Rain shwrs S S S S C C S Tstms S S $$ IAZ049-212100- Marshalltown-Marshall IA 42.11N 92.91W Elev. 972 ft 617 AM CDT Fri Aug 21 2026 Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 CDT 3hrly 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 85 61 81 56 78 Temp 65 74 82 85 80 70 66 63 62 73 79 81 76 65 61 58 56 68 75 78 74 Dewpt 63 67 69 68 66 64 61 60 60 64 63 61 60 58 56 54 53 58 57 58 59 RH 93 79 65 57 62 81 84 90 93 73 58 51 58 78 84 86 90 70 54 50 59 Wind dir S W W NW NW N N N NW NW NW N N N NW N N E NE N E Wind spd 5 10 9 9 6 4 3 3 3 5 10 10 5 3 3 3 1 1 1 2 1 Clouds FW FW FW FW FW FW FW FW CL CL CL CL CL CL FW FW SC SC FW SC SC PoP 12hr 20 0 0 0 0 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S Tstms S Date Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 Thu 08/27/26 CDT 6hrly 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 58 77 60 82 63 82 60 81 Temp 61 59 74 73 64 62 78 78 67 64 79 77 64 61 78 76 Dewpt 57 57 62 63 61 61 67 69 66 63 66 66 62 60 64 66 PWind dir SE SE SE S SW NW NW NW Wind char LT LT LT LT LT LT LT LT Avg clouds SC B1 B1 B1 SC SC B1 SC SC B1 SC FW FW FW FW SC PoP 12hr 20 30 10 10 40 20 10 5 Rain shwrs S C C C C S Tstms C S $$ IAZ086-212100- Ottumwa-Wapello IA 41.11N 92.45W Elev. 836 ft 617 AM CDT Fri Aug 21 2026 Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 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 86 65 82 59 79 Temp 66 76 82 85 83 73 70 67 66 75 80 81 79 69 65 61 59 71 77 79 76 Dewpt 64 69 72 73 71 68 66 64 63 66 66 66 65 62 60 58 57 62 61 62 63 RH 93 79 72 67 67 84 87 90 90 74 62 60 62 78 84 90 93 73 58 56 64 Wind dir S SW W W NW N N NW NW NW NW NW N N N N N NE NE NE E Wind spd 5 9 10 9 5 4 4 4 4 5 8 10 6 4 3 3 2 1 2 3 2 Wind gust 19 Clouds FW SC FW FW FW FW FW FW FW CL FW FW CL CL CL FW SC SC SC SC SC PoP 12hr 10 10 5 0 0 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Heat index 87 92 88 Max heat 87 93 83 82 85 Date Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 Thu 08/27/26 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 82 66 82 63 81 Temp 64 62 75 75 66 64 78 79 69 66 79 79 67 64 79 79 Dewpt 60 61 66 67 65 64 70 72 69 66 71 71 66 64 68 70 PWind dir SE SE SE S S NW NW NW Wind char LT LT LT LT LT LT LT LT Avg clouds SC B1 B1 SC SC SC SC SC SC SC B1 SC FW FW SC SC PoP 12hr 10 30 10 5 20 20 5 5 Rain shwrs S S C S S S Tstms S S $$