Point Forecast Matrices
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
Versions:
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572 FOMY50 PGUM 181751 PFMGUM Point Forecast Matrices National Weather Service Tiyan GU 351 AM ChST Sat Sep 19 2026 GUZ001-190600- Guam International Airport-Tiyan GU 13.48N 144.79E Elev. 248 ft 351 AM ChST Sat Sep 19 2026 Date Sat 09/19/26 Sun 09/20/26 Mon 09/21/26 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 79 87 79 87 Temp 79 80 84 87 86 85 83 81 79 80 84 87 86 85 83 81 79 80 84 87 86 Dewpt 78 78 78 78 78 78 78 78 78 78 77 77 77 77 78 77 77 77 77 77 77 RH 97 94 82 75 77 80 85 91 97 94 80 72 75 77 85 88 94 91 80 72 75 Wind dir W SW W W W W W W W W NW W W W SW SW N E SE SE SE Wind spd 4 6 8 8 8 6 5 4 3 3 1 2 3 3 2 1 2 2 3 5 4 Clouds B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B2 B2 B2 B2 B2 B2 B2 B2 PoP 12hr 50 40 40 60 60 QPF 12hr 0.19 0.15 0.28 0.31 0.17 Rain shwrs C C C C C C C C C C C C C C C L L 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 85 86 94 99 98 96 93 89 85 86 93 98 98 95 92 88 84 85 93 98 97 Max heat 86 94 99 98 91 93 98 97 90 93 98 Date Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 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 86 79 87 80 86 80 86 Temp 83 79 83 85 82 79 84 86 83 81 84 85 83 81 84 85 Dewpt 77 77 77 77 78 77 77 77 78 78 77 77 78 77 78 77 PWind dir SE SE S S S SW SW SW Wind char LT LT LT LT LT LT LT LT Avg clouds B2 B1 B2 B2 B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 50 50 50 50 50 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 S S S S S S S S S S $$ MPZ001-190600- Rota International Airport-Sinapalu MP 14.17N 145.23E Elev. 592 ft 351 AM ChST Sat Sep 19 2026 Date Sat 09/19/26 Sun 09/20/26 Mon 09/21/26 ChST3hrly 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 UTC 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 Max/Min 87 79 87 78 86 Temp 79 80 84 87 86 85 83 81 79 80 84 87 86 85 82 80 79 79 83 85 85 Dewpt 78 78 78 78 78 78 78 78 78 78 77 77 77 77 77 77 76 77 77 77 77 RH 97 94 82 75 77 80 85 91 97 94 80 72 75 77 85 91 91 94 82 77 77 Wind dir W SW W W SW W W W W NW NE SW W W N E NE NE E SE SE Wind spd 6 8 8 6 6 4 4 4 3 3 1 2 2 3 1 3 2 3 4 5 5 Clouds B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B2 B2 B2 B2 B1 B1 B1 B1 PoP 12hr 30 30 30 50 50 QPF 12hr 0.10 0.05 0.24 0.37 0.13 Rain shwrs S C C C C C C C C C C C C C C C C S S S S Tstms S S S S S S S S S S S S S S S S S S S S S Heat index 85 86 94 99 98 96 92 89 85 85 93 98 97 95 91 86 83 91 96 95 Max heat 85 94 99 98 91 93 98 97 89 91 96 Date Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 ChST6hrly 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 Min/Max 79 85 79 85 80 85 80 85 Temp 82 79 83 84 82 79 83 85 83 81 83 84 82 81 83 85 Dewpt 77 77 77 77 78 77 77 77 78 77 78 77 78 77 77 77 PWind dir SE SE SE S S S S SW Wind char LT GN GN LT LT LT LT LT Avg clouds B1 B1 B1 B2 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 30 40 40 40 40 30 30 20 Rain shwrs C C C C C C C C C C C C C S S S Tstms S S S S S S S S S S S $$ MPZ002-190600- Tinian-San Jose MP 14.97N 145.63E Elev. 74 ft 351 AM ChST Sat Sep 19 2026 Date Sat 09/19/26 Sun 09/20/26 Mon 09/21/26 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 79 87 78 87 Temp 79 80 84 87 86 85 83 81 79 80 84 87 86 85 82 80 79 79 84 87 86 Dewpt 78 78 78 78 78 78 78 78 78 77 77 77 77 77 77 77 77 77 77 77 77 RH 97 94 82 75 77 80 85 91 97 91 80 72 75 77 85 91 94 94 80 72 75 Wind dir SW W SW SW SW W W W NW N SE S SW N NE SE W S E SE SE Wind spd 6 8 6 6 6 4 2 2 1 1 2 2 1 2 3 2 1 2 4 8 8 Clouds B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B2 B2 OV OV B2 B2 B2 B2 PoP 12hr 30 30 30 70 70 QPF 12hr 0.10 0.04 0.20 0.54 0.30 Rain shwrs C C C C C C C C C C C C C C C L L C C C C Tstms S S S S S S S S S S S S S S S S Heat index 85 86 94 99 99 96 93 89 85 86 93 98 98 95 91 87 84 93 98 97 Max heat 86 94 99 98 91 93 98 97 90 93 98 Date Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 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 87 79 87 80 86 80 87 Temp 83 79 84 86 83 79 84 86 83 81 84 86 83 81 84 86 Dewpt 77 77 78 78 78 78 78 78 78 78 78 78 78 78 77 77 PWind dir SE SE SE SE SE SE S SW Wind char LT GN GN LT LT LT LT LT Avg clouds B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 50 30 30 30 30 30 30 20 Rain shwrs C C C C C C C C C C C C C S S S Tstms S S S S S S S S S S S $$ MPZ003-190600- Saipan International Airport-Obyan MP 15.11N 145.72E Elev. 215 ft 351 AM ChST Sat Sep 19 2026 Date Sat 09/19/26 Sun 09/20/26 Mon 09/21/26 ChST3hrly 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 UTC 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 Max/Min 87 79 87 79 87 Temp 79 80 84 87 86 85 83 81 79 80 84 87 86 85 83 81 79 80 84 87 86 Dewpt 78 78 78 78 78 78 78 78 78 77 77 77 77 77 77 77 77 77 77 77 77 RH 97 94 82 75 77 80 85 91 97 91 80 72 75 77 82 88 94 91 80 72 75 Wind dir SW SW SW W SW W W W NW NE E SE SW N NE SE SW S E SE SE Wind spd 6 8 6 6 5 4 2 2 1 2 2 2 0 2 3 2 1 2 4 8 8 Clouds B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B2 B2 OV OV B2 B2 B2 B2 PoP 12hr 30 30 30 60 60 QPF 12hr 0.12 0.04 0.18 0.52 0.34 Rain shwrs C C C C C C C S S C C C C C C L L C C C C Tstms S S S S S S S S S S S S S S S S Heat index 85 86 94 99 99 96 93 89 85 86 93 98 98 95 91 88 84 85 93 98 97 Max heat 86 94 99 98 91 93 98 97 90 93 98 Date Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 ChST6hrly 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 Min/Max 79 87 79 87 80 86 80 87 Temp 83 79 84 86 83 79 84 86 83 81 84 86 83 81 84 86 Dewpt 78 77 78 78 78 78 78 78 78 78 78 78 78 78 77 77 PWind dir SE SE SE SE SE SE S SW Wind char LT GN LT LT LT LT LT LT Avg clouds B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 50 30 30 30 30 30 20 20 Rain shwrs C C C C C C C C C C C S S S S S Tstms S S S S S S S S S S S $$