Point Forecast Matrices
Issued by NWS Des Moines, IA
Issued by NWS Des Moines, IA
254 FOUS53 KDMX 151143 PFMDMX Point Forecast Matrices National Weather Service Des Moines IA 643 AM CDT Tue Sep 15 2026 IAZ060-152100- Des Moines-Polk IA 41.54N 93.65W Elev. 924 ft 643 AM CDT Tue Sep 15 2026 Date Tue 09/15/26 Wed 09/16/26 Thu 09/17/26 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 72 60 72 64 80 Temp 69 70 71 72 67 65 63 62 62 61 64 70 70 69 68 67 65 70 76 80 76 Dewpt 68 67 63 63 62 62 61 61 60 61 63 68 69 69 68 67 65 69 72 73 72 RH 97 90 76 73 84 90 93 97 93100 97 93 97100100100100 97 87 79 87 Wind dir SW N N N N N NE NE E E E E E E E NE NE NE E E E Wind spd 5 5 8 5 3 4 4 5 8 8 8 6 5 4 2 2 1 3 4 4 4 Clouds B2 B2 B2 B2 B2 B2 SC B1 B2 B2 B2 B2 OV B2 B2 B2 B2 B2 B2 B2 B1 PoP 12hr 60 30 70 70 60 QPF 12hr 0.19 0.14 0.17 0.35 0.18 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C S S C C L C C C C L L L L C Tstms S S S S S S C C S S S C Flood A A A A A A A A A A Date Fri 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon 09/21/26 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 83 68 80 61 71 56 70 Temp 69 66 78 79 72 69 77 74 65 62 69 67 60 57 67 65 Dewpt 69 66 72 73 70 68 70 69 64 61 61 61 59 56 58 59 PWind dir E SE S W N N NE NE Wind char LT GN GN GN LT GN LT LT Avg clouds B1 B2 B1 SC SC SC B2 B1 B1 B1 B1 B1 B1 SC B1 SC PoP 12hr 50 70 80 70 40 30 20 5 Rain shwrs C C L C C D L C C C C S S Tstms C C C C C C C C S C S $$ IAZ039-152100- Waterloo/Cedar Falls-Black Hawk IA 42.55N 92.40W Elev. 865 ft 643 AM CDT Tue Sep 15 2026 Date Tue 09/15/26 Wed 09/16/26 Thu 09/17/26 CDT 3hrly 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 73 55 69 60 77 Temp 69 70 71 72 66 62 59 58 57 63 66 67 67 65 65 64 61 69 74 76 74 Dewpt 67 66 60 56 58 59 57 56 55 58 59 60 63 65 65 64 61 67 67 66 67 RH 93 87 68 57 75 90 93 93 93 84 78 78 87100100100100 93 79 71 79 Wind dir SW NW NW NW N N NE NE NE E E E SE SE SE SE NE N NE NE NE Wind spd 8 8 9 9 4 4 4 5 6 9 9 9 6 4 2 2 2 4 4 4 4 Clouds OV B2 B2 B2 B2 B1 FW SC B1 B1 B2 B2 B1 B2 B2 B2 B2 B2 B2 B2 B2 PoP 12hr 70 5 40 60 30 QPF 12hr 0.26 0 0.13 0.21 0.01 Snow 12hr 00-00 00-00 00-00 Rain shwrs L C S C C C C L L C C C Tstms S S C S S Flood A A A A A A A A A A Date Fri 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon 09/21/26 CDT 6hrly 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 61 77 64 78 58 70 52 70 Temp 65 62 74 74 68 65 76 73 63 59 69 66 57 53 68 65 Dewpt 65 62 67 68 67 65 68 65 63 59 58 58 57 53 55 55 PWind dir E SE S W N NE NE NE Wind char LT GN BZ GN GN GN LT GN Avg clouds B2 B2 B2 B2 B1 B1 B2 B2 B1 B1 B1 B1 B1 SC B1 SC PoP 12hr 60 80 80 70 30 20 20 10 Rain shwrs C L D L L D L C C S S S S Tstms S C C C C C S C S S S $$ IAZ048-152100- Ames-Story IA 41.99N 93.62W Elev. 936 ft 643 AM CDT Tue Sep 15 2026 Date Tue 09/15/26 Wed 09/16/26 Thu 09/17/26 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 73 57 70 62 79 Temp 69 69 70 72 67 63 61 59 59 61 64 68 68 67 67 66 63 69 75 78 74 Dewpt 67 66 61 59 60 61 59 58 58 59 62 65 67 67 67 66 63 68 70 71 70 RH 93 90 73 64 78 93 93 96 96 93 93 90 97100100100100 97 84 79 87 Wind dir SW NW N N N N NE NE E E E E SE E SE E N NE NE E NE Wind spd 5 6 8 5 3 3 3 4 6 8 8 6 4 3 1 1 1 3 4 4 4 Clouds B2 B2 OV B2 B2 B2 B1 SC B2 B2 B2 B2 OV B2 B2 B2 OV OV B2 B2 B2 PoP 12hr 50 20 60 70 60 QPF 12hr 0.13 0.03 0.15 0.36 0.06 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C S C C C L C C L L L L S S C Tstms S S S S C C C S C Flood A A A A A A A A A A Date Fri 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon 09/21/26 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 66 79 59 71 54 70 Temp 68 64 76 77 70 67 77 73 64 60 69 67 59 54 68 65 Dewpt 68 64 72 73 70 67 69 68 64 60 60 60 59 54 57 58 PWind dir E SE S W N N NE NE Wind char LT GN GN GN LT GN LT LT Avg clouds B1 B2 B2 B1 B1 B1 B2 B2 B1 B1 B1 B1 B1 SC B1 SC PoP 12hr 70 80 90 60 30 30 10 5 Rain shwrs C L D L L D L C C S S C Tstms C C C C C C S C S S S $$ IAZ004-152100- Estherville-Emmet IA 43.40N 94.75W Elev. 1315 ft 643 AM CDT Tue Sep 15 2026 Date Tue 09/15/26 Wed 09/16/26 Thu 09/17/26 CDT 3hrly 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 70 50 69 57 73 Temp 61 60 67 70 65 56 53 52 50 61 67 68 65 62 62 60 58 65 70 73 70 Dewpt 57 51 51 54 58 55 53 50 48 55 56 59 62 62 62 60 58 63 64 65 66 RH 87 72 56 57 78 96100 93 93 81 68 73 90100100100100 93 81 76 87 Wind dir W NW NW NW N NE E E E E SE SE SE SE S SW N NE NE E E Wind spd 5 11 10 6 3 3 3 3 5 9 11 9 6 4 2 2 2 4 6 5 5 Clouds B2 SC SC SC FW FW CL SC FW FW SC SC SC B2 B2 B2 B2 B2 B2 B2 B2 PoP 12hr 5 0 5 20 40 QPF 12hr 0 0 0 0.01 0.02 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S C C C C C Date Fri 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon 09/21/26 CDT 6hrly 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 58 75 61 72 54 67 50 68 Temp 62 59 68 73 66 62 70 68 59 55 64 64 55 50 66 64 Dewpt 62 59 67 69 66 62 65 64 59 54 57 59 55 49 55 58 PWind dir E SE S NW N NE NE NE Wind char GN GN GN GN GN GN LT LT Avg clouds B2 B2 B2 B2 B1 B1 B2 B1 B1 SC B1 B1 SC SC SC SC PoP 12hr 80 90 70 20 10 20 5 5 Rain shwrs C D D L L L S S Tstms S C C C C S S $$ IAZ035-152100- Fort Dodge-Webster IA 42.55N 94.18W Elev. 1165 ft 643 AM CDT Tue Sep 15 2026 Date Tue 09/15/26 Wed 09/16/26 Thu 09/17/26 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 72 53 69 59 77 Temp 68 65 68 71 66 59 57 55 55 62 64 67 67 65 64 63 60 68 74 76 73 Dewpt 67 59 55 56 59 58 57 55 53 57 59 63 65 65 64 63 60 67 68 69 69 RH 97 81 63 59 78 96100100 93 84 84 87 93100100100100 97 82 79 87 Wind dir NW N N N N NE NE E E E SE SE SE SE SE SE N NE NE E E Wind spd 4 10 9 5 2 2 3 4 5 8 8 6 4 2 1 1 1 2 3 3 4 Clouds OV B2 B1 B2 B1 B2 SC B1 B2 B1 B1 SC B1 B2 OV OV OV B2 B2 B2 B2 PoP 12hr 30 5 40 40 50 QPF 12hr 0.05 0 0.09 0.11 0.06 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C S C C C C C C C C C Tstms S S S S S C Flood A A A A A A A A A A Date Fri 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon 09/21/26 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 77 56 69 51 70 Temp 65 62 74 76 68 65 74 71 61 57 67 65 57 51 68 64 Dewpt 65 62 70 73 68 65 68 67 61 57 59 61 56 51 56 59 PWind dir E SE S W N N NE NE Wind char LT GN GN GN LT LT LT LT Avg clouds B2 OV B2 B2 B1 B2 B2 B1 B1 B1 B2 B1 SC SC B1 SC PoP 12hr 80 80 90 40 30 20 10 5 Rain shwrs C D D L L D C C C S S Tstms C C C C C C S S S $$ IAZ094-152100- Lamoni-Decatur IA 40.63N 93.90W Elev. 1125 ft 643 AM CDT Tue Sep 15 2026 Date Tue 09/15/26 Wed 09/16/26 Thu 09/17/26 CDT 3hrly 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 74 60 77 66 82 Temp 70 74 74 68 65 64 64 62 62 64 69 75 75 71 70 68 67 72 78 81 78 Dewpt 68 70 68 66 65 64 64 62 62 64 69 74 74 71 70 68 67 71 74 75 75 RH 93 87 82 93100100100100100100100 97 97100100100100 97 88 82 91 Wind dir NE N NE N N NE NE NE NE E E SE E E E NW NE E SE E E Wind spd 5 5 8 8 8 6 6 8 8 6 6 6 3 4 3 3 2 3 4 4 4 Clouds B2 B2 B2 B2 B2 B2 OV B2 OV B2 B2 OV B2 B2 B2 B2 B2 B2 B1 SC SC PoP 12hr 60 80 70 50 40 QPF 12hr 0.48 0.76 0.21 0.07 0.04 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C S L C L L C L L S C C L L C C S S S Tstms S S S C C C C S C S S C S S S S Heat index 87 Max heat 89 Flood A A A A A A A A A A Date Fri 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon 09/21/26 CDT 6hrly 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 66 83 67 78 61 69 55 67 Temp 70 67 80 78 72 69 76 74 65 62 67 65 59 56 65 63 Dewpt 70 67 74 74 69 67 71 71 65 62 65 63 59 56 62 61 PWind dir E S S SW N N NE NE Wind char LT GN GN GN LT GN LT LT Avg clouds SC B1 SC SC SC SC B1 B1 B1 B1 B2 B1 B1 B1 B1 SC PoP 12hr 20 30 60 70 50 30 10 5 Rain shwrs S S C C S L L C C C C S Tstms S S S C S C C S C S S $$ IAZ017-152100- Mason City-Cerro Gordo IA 43.16N 93.33W Elev. 1189 ft 643 AM CDT Tue Sep 15 2026 Date Tue 09/15/26 Wed 09/16/26 Thu 09/17/26 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 69 49 68 57 74 Temp 65 63 67 69 64 57 54 52 51 61 66 67 65 62 62 61 59 66 71 74 71 Dewpt 64 56 54 55 58 56 54 52 51 56 57 59 61 62 62 61 59 65 65 65 65 RH 97 78 63 61 81 96100100100 84 73 75 87100100100100 97 81 74 81 Wind dir NW NW NW NW N N NE NE E E SE SE SE SE S S N NE NE NE NE Wind spd 5 10 10 8 3 2 2 3 4 9 9 8 5 3 2 1 1 3 4 3 3 Clouds B2 B1 B1 B1 B2 B1 SC B1 B1 SC SC SC B1 B2 OV OV OV B2 B2 B2 B2 PoP 12hr 20 0 30 50 20 QPF 12hr 0.02 0 0.06 0.07 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C C C C S S S S C Tstms S Date Fri 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon 09/21/26 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 74 60 74 54 67 49 68 Temp 62 58 69 71 66 63 71 69 60 56 66 64 55 50 66 63 Dewpt 62 58 66 68 66 63 66 64 60 56 57 58 55 50 54 56 PWind dir E SE S W N NE NE NE Wind char LT GN GN GN LT GN LT LT Avg clouds B2 OV B2 B2 B2 B2 B2 B1 B1 B1 B2 B1 SC SC SC SC PoP 12hr 70 90 90 50 30 20 10 5 Rain shwrs C L D D D D C C C S S Tstms S C C C C C S S $$ IAZ049-152100- Marshalltown-Marshall IA 42.11N 92.91W Elev. 972 ft 643 AM CDT Tue Sep 15 2026 Date Tue 09/15/26 Wed 09/16/26 Thu 09/17/26 CDT 3hrly 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 74 55 70 60 78 Temp 68 70 71 73 67 61 60 58 57 61 64 68 68 66 66 65 62 69 74 78 74 Dewpt 67 66 61 59 59 59 58 57 56 59 60 63 65 66 66 65 62 68 68 69 68 RH 97 87 71 62 75 93 93 96 96 93 87 84 90100100100100 97 82 74 82 Wind dir SW NW N NW N NE NE NE NE E E E SE E E SE N N NE NE NE Wind spd 6 6 8 5 3 3 4 5 6 8 6 6 4 3 2 2 2 2 2 3 4 Clouds B2 B2 B2 B2 OV B1 B1 SC B2 B2 B2 B1 OV B2 B2 B2 B2 OV B2 B2 B1 PoP 12hr 80 10 60 70 50 QPF 12hr 0.17 0 0.16 0.47 0.02 Snow 12hr 00-00 00-00 00-00 Rain shwrs D C S C C S C C C L L C C S S C Tstms S S C C C S S C Flood A A A A A A A A A A Date Fri 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon 09/21/26 CDT 6hrly 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 61 80 64 79 57 71 52 71 Temp 66 62 75 76 68 66 76 73 63 59 69 66 57 53 68 65 Dewpt 66 62 69 70 68 66 68 66 63 59 59 59 57 53 55 56 PWind dir E SE S W N N NE NE Wind char LT GN GN GN LT LT LT LT Avg clouds B1 B2 B2 B1 B1 B1 B2 B2 B1 B1 B1 B1 B1 SC B1 SC PoP 12hr 60 70 80 70 30 20 20 10 Rain shwrs C L L L C D L C C S S S S S Tstms C C C C C C S C S S S S $$ IAZ086-152100- Ottumwa-Wapello IA 41.11N 92.45W Elev. 836 ft 643 AM CDT Tue Sep 15 2026 Date Tue 09/15/26 Wed 09/16/26 Thu 09/17/26 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 61 75 66 82 Temp 70 74 76 73 68 66 65 63 63 65 68 73 74 71 71 69 67 74 78 81 79 Dewpt 69 71 70 68 67 66 65 63 63 65 68 73 74 71 71 69 67 73 75 76 76 RH 97 90 82 84 97100100100100100100100100100100100100 97 91 85 91 Wind dir E W N N N N NE NE NE E E E E E E NE NW N N N NE Wind spd 4 6 8 6 4 4 4 6 6 6 5 5 4 4 3 3 2 3 2 3 3 Clouds B2 B2 B2 B2 B2 OV B2 B2 B2 OV OV B2 B2 B1 B2 B2 B2 B2 B2 B1 SC PoP 12hr 60 60 80 70 60 QPF 12hr 0.19 0.50 0.19 0.88 0.13 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C S C C C L C L L C C C L L L L S S C Tstms S S S S C C C S S C C S S S C Heat index 87 Max heat 89 Date Fri 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon 09/21/26 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 83 68 80 62 72 56 70 Temp 70 67 79 80 72 69 78 76 67 63 69 69 61 57 67 66 Dewpt 70 67 74 75 70 69 73 73 67 63 65 64 61 57 62 61 PWind dir E SE S SW N N NE NE Wind char LT GN GN GN LT GN LT LT Avg clouds B1 B1 B1 SC FW SC B1 B1 B1 B1 B1 B1 SC B1 B1 SC PoP 12hr 50 60 50 60 50 30 20 10 Rain shwrs C C L S S C L C C C C S S Tstms C C C S S S S S C S S $$