Point Forecast Matrices
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
685 FOMY50 PGUM 070512 PFMGUM Point Forecast Matrices National Weather Service Tiyan GU 312 PM ChST Mon Sep 7 2026 GUZ001-071800- Guam International Airport-Tiyan GU 13.48N 144.79E Elev. 248 ft 312 PM ChST Mon Sep 7 2026 Date Mon 09/07/26 Tue 09/08/26 Wed 09/09/26 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 78 86 78 Temp 86 84 82 80 78 79 83 87 86 84 82 80 78 79 83 86 85 84 82 80 78 Dewpt 78 77 78 78 78 78 78 78 78 78 79 79 78 78 78 78 78 79 79 79 78 RH 77 80 88 94100 97 85 75 77 82 91 97100 97 85 77 80 85 91 97100 Wind dir N N N N N N N N N N N N N N N N N N NE NE NE Wind spd 9 8 4 4 4 5 8 8 8 6 6 5 4 6 9 10 9 6 5 3 3 Clouds B1 SC SC SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 30 30 30 30 30 QPF 12hr 0.02 0.02 0.16 0.11 0.21 Rain shwrs C S S S S S S S S 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 Heat index 98 95 91 86 93 99 99 96 92 86 92 98 98 95 91 85 Max heat 99 98 89 93 99 98 90 92 98 97 90 Date 09/10/26 Fri 09/11/26 Sat 09/12/26 Sun 09/13/26 Mon 09/14/26 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 86 76 89 76 89 76 89 79 86 Temp 83 85 81 77 84 88 82 77 84 88 82 77 84 88 84 80 83 85 Dewpt 78 78 79 77 78 79 79 77 78 78 79 77 78 78 79 79 79 78 PWind dir NE NE N N NE NE SE SE SE Wind char LT LT LT LT LT LT LT LT LT Avg clouds B1 SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC PoP 12hr 30 20 20 20 20 20 10 20 20 Rain shwrs C S S S S S S S S S S S S S S S S S Tstms S $$ MPZ001-071800- Rota International Airport-Sinapalu MP 14.17N 145.23E Elev. 592 ft 312 PM ChST Mon Sep 7 2026 Date Mon 09/07/26 Tue 09/08/26 Wed 09/09/26 Thu ChST3hrly 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 UTC 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 Min/Max 78 86 78 86 78 Temp 85 84 82 80 78 79 83 86 85 84 82 80 78 79 83 86 85 84 82 80 78 Dewpt 78 78 78 78 78 78 78 78 78 78 79 79 78 78 78 78 79 79 79 79 78 RH 80 82 88 94100 97 85 77 80 82 91 97100 97 85 77 82 85 91 97100 Wind dir N N N N N N N N N N N N N N N N N NE NE NE E Wind spd 6 5 3 3 4 5 8 8 6 6 5 5 5 6 8 8 8 8 6 5 3 Clouds B1 SC SC SC SC SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 30 20 30 30 30 QPF 12hr 0.02 0.01 0.12 0.14 0.17 Rain shwrs C S S S S S S S S C C C C C C C C C C C C Tstms S S S S S S S S S S S S S Heat index 97 94 90 85 92 98 97 94 91 85 93 98 98 95 91 86 Max heat 98 96 89 92 98 96 90 93 98 97 90 Date 09/10/26 Fri 09/11/26 Sat 09/12/26 Sun 09/13/26 Mon 09/14/26 ChST6hrly 10 16 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 Max/Min 86 77 86 77 87 76 87 78 84 Temp 83 85 81 78 83 86 81 78 83 87 81 77 83 87 82 78 81 83 Dewpt 78 79 79 78 79 79 79 78 78 78 79 77 79 78 79 78 78 78 PWind dir NE NE NE NE NE E SE SE SE Wind char LT LT LT LT LT LT LT LT LT Avg clouds B1 SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC PoP 12hr 30 20 20 20 20 20 10 20 20 Rain shwrs C S S S S S S S S S S S S S S S S S Tstms S $$ MPZ002-071800- Tinian-San Jose MP 14.97N 145.63E Elev. 74 ft 312 PM ChST Mon Sep 7 2026 Date Mon 09/07/26 Tue 09/08/26 Wed 09/09/26 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 78 86 78 Temp 86 84 82 80 78 79 83 87 86 84 82 80 78 79 83 86 85 84 82 80 78 Dewpt 78 78 78 78 78 78 78 78 78 79 79 79 78 79 79 79 79 79 80 80 78 RH 77 82 88 94100 97 85 75 77 85 91 97100100 88 80 82 85 94100100 Wind dir NW N N N N N NE N N N N N N N NE NE NE NE NE E E Wind spd 4 3 2 2 3 5 5 5 4 4 5 5 5 6 6 8 8 8 8 6 4 Clouds B1 SC SC SC SC SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 30 20 30 30 30 QPF 12hr 0.06 0.04 0.21 0.24 0.16 Rain shwrs C S S S S S S S S C C C C C C C C S S S S Tstms S S S S S S S S S Heat index 99 95 91 86 94100 99 96 92 86 93 99 98 96 92 86 Max heat 99 98 89 94 100 98 91 93 99 97 91 Date 09/10/26 Fri 09/11/26 Sat 09/12/26 Sun 09/13/26 Mon 09/14/26 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 86 76 89 76 89 76 89 77 86 Temp 83 85 81 77 84 88 82 77 84 88 82 77 84 88 82 77 82 85 Dewpt 79 79 79 77 79 79 79 77 79 78 79 77 79 78 79 77 78 79 PWind dir E NE NE NE E SE SE SE E Wind char LT LT LT LT LT LT LT LT LT Avg clouds SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC PoP 12hr 20 20 20 20 20 20 10 20 20 Rain shwrs S S S S S S S S S S S S S S S S S S $$ MPZ003-071800- Saipan International Airport-Obyan MP 15.11N 145.72E Elev. 215 ft 312 PM ChST Mon Sep 7 2026 Date Mon 09/07/26 Tue 09/08/26 Wed 09/09/26 Thu ChST3hrly 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 UTC 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 Min/Max 78 87 78 86 78 Temp 86 84 82 80 78 79 83 87 86 84 82 80 78 79 83 86 85 84 82 80 78 Dewpt 78 77 78 78 78 78 78 78 78 79 79 79 78 79 79 79 79 79 80 80 78 RH 77 80 88 94100 97 85 75 77 85 91 97100100 88 80 82 85 94100100 Wind dir NE NE NE N N N NE NE N N N N N N NE NE NE NE NE E E Wind spd 6 4 3 2 3 5 6 5 4 4 5 5 5 6 6 8 9 9 8 6 5 Clouds B1 SC SC SC SC SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 30 20 30 30 30 QPF 12hr 0.05 0.04 0.22 0.27 0.18 Rain shwrs C S S S S S S S S C C C C C C C C S S S S Tstms S S S S S S S S S Heat index 99 95 91 86 94100 99 96 92 86 93 99 98 96 92 86 Max heat 99 98 89 94 100 98 91 93 99 98 91 Date 09/10/26 Fri 09/11/26 Sat 09/12/26 Sun 09/13/26 Mon 09/14/26 ChST6hrly 10 16 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 Max/Min 86 77 89 76 89 76 89 77 87 Temp 83 85 81 77 84 88 82 77 84 88 82 77 84 88 83 78 83 86 Dewpt 79 79 79 77 79 79 79 77 79 78 79 77 79 79 79 78 79 79 PWind dir E NE NE NE E SE SE SE SE Wind char LT LT LT LT LT LT LT LT LT Avg clouds B1 SC SC SC B1 B1 B1 SC SC SC SC SC SC SC SC SC SC SC PoP 12hr 20 20 20 20 20 20 10 20 20 Rain shwrs S S S S S S S S S S S S S S S S S S $$