Point Forecast Matrices
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
149 FOMY50 PGUM 140556 PFMGUM Point Forecast Matrices National Weather Service Tiyan GU 355 PM ChST Mon Sep 14 2026 GUZ001-141800- Guam International Airport-Tiyan GU 13.48N 144.79E Elev. 248 ft 355 PM ChST Mon Sep 14 2026 Date Mon 09/14/26 Tue 09/15/26 Wed 09/16/26 Thu ChST3hrly 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 UTC 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 Min/Max 78 87 77 87 78 Temp 86 83 81 79 78 79 83 87 86 84 82 79 78 78 84 88 87 85 83 80 79 Dewpt 78 77 77 77 78 78 78 78 78 79 79 79 78 78 79 79 79 79 80 79 79 RH 77 82 88 94100 97 85 75 77 85 91100100100 85 75 77 82 91 97100 Wind dir N N NE NE NE N NW NW NW NW NW NW W W W W W W W W W Wind spd 5 5 4 3 2 2 3 6 9 6 5 5 6 8 9 10 11 10 9 8 6 Clouds B1 B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 SC SC SC SC B1 B1 B1 B1 PoP 12hr 40 40 30 30 20 QPF 12hr 0.24 0.14 0.09 0.06 0.08 Rain shwrs C C C C C C C C C C C C C S S S S S S S S Tstms S S S S S S S S S S S S S S S S S Heat index 100 92 88 84 94100 99 96 91 95102102 98 94 89 Max heat 100 99 87 94 100 98 90 95 102 101 92 Date 09/17/26 Fri 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon 09/21/26 ChST6hrly 10 16 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 Max/Min 87 79 87 79 87 79 87 79 87 Temp 84 87 83 80 84 87 83 80 84 87 83 80 84 87 84 80 85 88 Dewpt 79 79 80 79 79 79 80 79 79 79 80 79 79 79 79 79 78 79 PWind dir W W W W SW SW W W W Wind char GN GN GN GN LT LT LT LT LT Avg clouds B1 B1 B1 B1 B1 B1 B1 B1 B1 SC B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 20 30 30 30 30 30 40 40 30 Rain shwrs S S C C C C C C C S 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 $$ MPZ001-141800- Rota International Airport-Sinapalu MP 14.17N 145.23E Elev. 592 ft 355 PM ChST Mon Sep 14 2026 Date Mon 09/14/26 Tue 09/15/26 Wed 09/16/26 Thu ChST3hrly 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 UTC 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 Min/Max 77 87 76 87 77 Temp 85 82 80 78 77 78 83 87 86 84 81 78 77 77 83 87 86 84 82 79 78 Dewpt 78 77 78 78 77 78 78 79 79 79 79 78 77 77 79 79 79 79 80 79 78 RH 80 85 94100100100 85 77 80 85 94100100100 88 77 80 85 94100100 Wind dir N N NE N N N N N NW NW NW NW NW NW NW NW NW W W W W Wind spd 4 4 4 3 2 2 4 6 8 6 6 6 6 8 8 10 11 10 8 6 5 Clouds SC B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 SC SC SC SC SC SC SC SC PoP 12hr 40 40 30 30 20 QPF 12hr 0.17 0.06 0.05 0.04 0.09 Rain shwrs S C C C C C C C C C C C C S S S S S S S S Tstms S S S S S S S S S S S S Heat index 98 90 85 93100100 96 90 93101100 97 92 Max heat 99 98 93 100 98 88 93 101 99 90 Date 09/17/26 Fri 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon 09/21/26 ChST6hrly 10 16 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 Max/Min 87 79 87 79 87 79 87 78 86 Temp 83 86 83 79 84 86 83 79 84 86 83 79 84 86 82 79 83 85 Dewpt 79 79 80 79 79 80 80 79 79 79 80 79 79 79 79 79 79 79 PWind dir W W SW SW SW SW SW W W Wind char LT LT GN LT LT LT LT LT LT Avg clouds SC SC SC SC SC SC SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 20 20 20 20 20 30 30 30 30 Rain shwrs S S S S S S S S S S C C C C C C C C Tstms S S S S S S S S S S S S S S S S $$ MPZ002-141800- Tinian-San Jose MP 14.97N 145.63E Elev. 74 ft 355 PM ChST Mon Sep 14 2026 Date Mon 09/14/26 Tue 09/15/26 Wed 09/16/26 Thu ChST3hrly 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 UTC 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 Min/Max 78 87 77 87 77 Temp 86 83 81 79 78 79 83 87 86 84 82 79 78 78 83 87 86 84 82 79 78 Dewpt 79 79 79 79 78 79 79 79 79 79 79 79 78 78 79 79 79 79 79 79 78 RH 80 88 94100100100 88 77 80 85 91100100100 88 77 80 85 91100100 Wind dir NE NE NE NE NE NE NE N N N N N NW NW NW NW NW NW NW W W Wind spd 4 5 6 5 3 4 6 6 6 6 6 6 6 6 8 10 12 10 8 6 6 Clouds SC B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 SC SC SC SC SC SC SC SC PoP 12hr 50 50 40 30 20 QPF 12hr 0.22 0.31 0.19 0.10 0.07 Rain shwrs S C C C C C C C C C C C C S S S S S S S S Tstms S S S S S S S S S S S S Heat index 101 94 90 85 94101100 96 92 94100100 96 91 Max heat 102 100 89 94 101 99 90 94 100 99 90 Date 09/17/26 Fri 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon 09/21/26 ChST6hrly 10 16 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 Max/Min 87 79 87 79 87 79 87 78 87 Temp 84 87 83 80 84 87 83 80 84 87 83 80 84 87 83 79 84 88 Dewpt 79 79 79 80 79 80 80 80 79 79 80 79 78 79 79 79 79 79 PWind dir W W SW SW SW SW SW SW W Wind char GN GN GN GN LT LT LT LT LT Avg clouds SC SC SC SC SC SC SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 20 10 10 20 20 30 30 30 30 Rain shwrs S S S S S S S S S S C C C C C C C C Tstms S S S S S S S S $$ MPZ003-141800- Saipan International Airport-Obyan MP 15.11N 145.72E Elev. 215 ft 355 PM ChST Mon Sep 14 2026 Date Mon 09/14/26 Tue 09/15/26 Wed 09/16/26 Thu ChST3hrly 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 UTC 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 Min/Max 78 87 77 87 77 Temp 86 83 81 79 78 79 83 87 86 84 82 79 78 78 83 87 86 84 82 79 78 Dewpt 79 79 79 79 78 79 79 79 79 79 80 79 78 78 79 79 79 79 79 79 78 RH 80 88 94100100100 88 77 80 85 94100100100 88 77 80 85 91100100 Wind dir NE NE NE NE NE NE NE NE N N N N NW NW NW NW NW NW NW W W Wind spd 5 6 8 6 5 5 6 6 6 6 6 6 6 6 8 10 11 10 8 6 6 Clouds SC B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 SC SC SC SC SC SC SC SC PoP 12hr 50 50 40 30 20 QPF 12hr 0.22 0.25 0.16 0.12 0.07 Rain shwrs S C C C C C C C C C C C C S S S S S S S S Tstms S S S S S S S S S S S S Heat index 101 94 90 85 94101100 96 92 94100100 96 91 Max heat 102 100 89 94 101 99 90 94 100 99 90 Date 09/17/26 Fri 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon 09/21/26 ChST6hrly 10 16 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 Max/Min 87 79 87 79 87 79 87 79 87 Temp 84 87 83 80 84 87 83 80 84 87 83 80 84 87 83 79 85 88 Dewpt 79 79 79 79 79 80 80 80 79 79 79 79 78 78 79 79 79 79 PWind dir W W SW SW SW SW SW SW W Wind char GN GN GN GN LT LT LT LT LT Avg clouds SC SC SC SC SC SC SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 20 10 10 10 20 30 30 30 30 Rain shwrs S S S S S S S S S S C C C C C C C C Tstms S S S S S S S S $$