Point Forecast Matrices
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
605 FOMY50 PGUM 191751 PFMGUM Point Forecast Matrices National Weather Service Tiyan GU 351 AM ChST Sun Sep 20 2026 GUZ001-200600- Guam International Airport-Tiyan GU 13.48N 144.79E Elev. 248 ft 351 AM ChST Sun Sep 20 2026 Date Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 ChST3hrly 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 UTC 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 Max/Min 87 78 87 78 87 Temp 79 79 83 87 86 84 82 80 78 79 83 87 86 84 82 80 78 79 83 86 86 Dewpt 79 79 79 79 79 79 79 79 78 78 78 78 78 78 78 78 78 78 78 78 78 RH 100100 88 77 80 85 91 97100 97 85 75 77 82 88 94100 97 85 77 77 Wind dir SW SE W W W E S S SE SE SE S S S S S S S S S S Wind spd 1 0 4 4 4 1 0 0 0 0 5 5 6 3 2 1 2 2 8 8 8 Clouds B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 B1 B1 B2 B2 B2 B2 PoP 12hr 50 60 60 50 50 QPF 12hr 0.36 0.43 0.18 0.21 0.31 Rain shwrs C C C C C L L L L C C C C C C C C C C C C Tstms S S S S S S S S S S S S S S S S S S S S S Heat index 84 94100 99 96 91 86 93100 99 96 91 86 93 99 98 Max heat 94 100 98 90 93 100 98 90 93 99 Date Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 Sat 09/26/26 ChST6hrly 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 Min/Max 78 87 79 87 78 86 79 88 Temp 82 78 84 87 83 79 84 86 82 79 83 86 82 79 84 87 Dewpt 79 78 78 79 79 79 79 79 79 79 79 79 79 79 79 79 PWind dir S S S SW SW W W W Wind char LT LT LT LT LT LT LT LT Avg clouds B2 B2 B2 B2 B2 B2 B2 B1 B1 B1 B2 B2 B2 B2 B1 B1 PoP 12hr 50 50 50 40 40 50 50 40 Rain shwrs C C C C C C C C C C C C C C C C Tstms S S S S S S S $$ MPZ001-200600- Rota International Airport-Sinapalu MP 14.17N 145.23E Elev. 592 ft 351 AM ChST Sun Sep 20 2026 Date Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 ChST3hrly 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 UTC 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 Max/Min 85 77 85 78 84 Temp 78 79 82 85 85 83 81 79 78 78 82 84 84 83 81 79 78 78 82 84 84 Dewpt 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 79 RH 100 97 88 80 80 85 91 97100100 88 82 82 85 91 97100100 88 82 85 Wind dir SW SW NW NW N NE SE SE SE SE SE SE SE SE SE SE SE S SE S S Wind spd 2 2 4 5 4 3 3 3 3 4 9 10 10 8 6 6 6 8 11 11 9 Clouds B1 B1 B1 B1 B1 B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 B2 B2 B2 B2 PoP 12hr 40 40 40 40 40 QPF 12hr 0.12 0.18 0.15 0.19 0.20 Rain shwrs C C C C C C C C C C C C C C C C C C C C C Tstms S S S S S S S S S S S S S S S S S S S S S Heat index 92 97 96 93 89 90 95 94 92 89 91 95 94 Max heat 92 97 95 88 90 95 94 88 91 95 Date Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 Sat 09/26/26 ChST6hrly 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 Min/Max 78 84 78 84 78 84 79 85 Temp 81 78 82 84 81 79 82 84 81 78 82 84 81 79 82 85 Dewpt 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 PWind dir S S S SW W W W W Wind char GN GN LT LT LT LT LT LT Avg clouds B1 B1 B2 B2 B2 B2 B1 B1 B1 B1 B2 B2 B1 B1 B1 B1 PoP 12hr 40 40 50 50 40 40 40 40 Rain shwrs C C C C C C C C C C C C C C C C Tstms S S S S S $$ MPZ002-200600- Tinian-San Jose MP 14.97N 145.63E Elev. 74 ft 351 AM ChST Sun Sep 20 2026 Date Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 ChST3hrly 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 UTC 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 Max/Min 88 79 88 79 88 Temp 80 80 84 87 87 85 83 81 79 80 84 87 87 85 83 81 80 80 84 87 87 Dewpt 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 79 79 79 RH 94 94 82 75 75 80 85 91 97 94 82 75 75 80 85 91 94 94 85 77 77 Wind dir S SW SW SW SE E SE E E E SE SE SE SE SE SE SE SE SE SE SE Wind spd 2 2 4 5 4 4 3 3 4 5 8 9 9 8 6 6 6 6 9 9 9 Clouds B1 B1 B1 B1 B1 B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 B2 B2 B2 B2 PoP 12hr 30 60 60 40 40 QPF 12hr 0.33 0.47 0.29 0.11 0.11 Rain shwrs C C C C C L L L L C C C C C C C C C C C C Tstms S S S S S S S S S S S S S S S S S S S S S Heat index 86 88 95100 99 97 93 89 85 86 95101100 97 93 89 85 88 96101101 Max heat 88 95 100 99 91 95 101 99 92 96 101 Date Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 Sat 09/26/26 ChST6hrly 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 Min/Max 79 88 80 87 80 87 80 88 Temp 83 80 84 87 83 80 84 86 83 80 84 87 83 80 85 88 Dewpt 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 PWind dir SE SE SE S W W NW N Wind char GN GN LT LT LT LT LT LT Avg clouds B1 B1 B1 B1 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 40 30 50 50 30 40 40 30 Rain shwrs C C C C C C C C C C C C C C C C Tstms S S S S S $$ MPZ003-200600- Saipan International Airport-Obyan MP 15.11N 145.72E Elev. 215 ft 351 AM ChST Sun Sep 20 2026 Date Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 ChST3hrly 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 UTC 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 Max/Min 88 79 88 79 88 Temp 79 80 84 88 87 85 83 81 79 80 84 88 87 85 83 81 79 80 84 88 87 Dewpt 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 79 79 79 RH 97 94 82 72 75 80 85 91 97 94 82 72 75 80 85 91 97 94 85 75 77 Wind dir E SE E NE SE E E E E E SE SE SE SE SE SE SE SE SE SE SE Wind spd 1 2 5 5 5 4 3 2 3 5 9 10 9 6 6 5 5 6 10 10 9 Clouds B1 B1 B1 B1 B1 B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 B2 B2 B2 B2 PoP 12hr 30 50 50 30 40 QPF 12hr 0.37 0.26 0.13 0.08 0.11 Rain shwrs C C C C C C C C C C C C C S S S S C C C C Tstms S S S S S S S S S S S S S S S S S S S S S Heat index 84 85 96101100 97 93 89 85 95102101 98 93 89 85 96102101 Max heat 85 96 101 100 91 95 102 100 91 96 102 Date Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 Sat 09/26/26 ChST6hrly 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 Min/Max 79 88 79 88 79 87 79 89 Temp 83 79 84 87 83 80 84 87 83 79 84 87 83 80 85 88 Dewpt 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 PWind dir SE SE SE S NW NW NW N Wind char GN GN LT LT LT LT LT LT Avg clouds B1 B1 B1 B1 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 40 30 50 50 30 30 30 30 Rain shwrs C C C C C C C C C C C C C C C C Tstms S S S $$