


Point Forecast Matrices
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
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881 FOMY50 PGUM 111820 PFMGUM POINT FORECAST MATRICES NATIONAL WEATHER SERVICE TIYAN GU 411 AM CHST SUN OCT 12 2025 GUZ001-120600- GUAM INTERNATIONAL AIRPORT-TIYAN GU 13.48N 144.79E ELEV. 248 FT 411 AM CHST SUN OCT 12 2025 DATE SUN 10/12/25 MON 10/13/25 TUE 10/14/25 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 89 76 89 76 87 TEMP 77 84 89 88 85 82 79 77 77 84 89 88 85 82 79 77 77 83 87 86 DEWPT 77 77 77 77 77 78 78 77 77 78 78 78 78 78 78 77 77 78 78 78 RH 100 80 68 70 77 88 97100100 82 70 72 80 88 97100100 85 75 77 WIND DIR E E E E E E E E E E E E E E E E E E E SE WIND SPD 6 10 9 9 8 5 6 5 8 10 11 11 10 9 9 6 10 11 12 12 CLOUDS SC SC SC SC SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B2 B2 B2 B2 POP 12HR 20 20 20 30 50 QPF 12HR 0.05 0.08 0.16 0.18 0.44 RAIN SHWRS S S S S S S S S S S S S C C C C C C C C TSTMS S S S S HEAT INDEX 93101100 96 91 94102101 97 91 92 99 98 MAX HEAT 93 101 99 89 94 102 100 90 92 99 DATE WED 10/15/25 THU 10/16/25 FRI 10/17/25 SAT 10/18/25 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 76 87 76 87 76 88 79 88 TEMP 81 77 83 86 81 77 83 86 81 77 83 87 83 79 84 87 DEWPT 78 77 78 78 79 77 79 79 80 77 79 79 79 79 79 79 PWIND DIR E SE S SE SE E E E WIND CHAR GN LT GN GN LT LT LT GN AVG CLOUDS B2 B2 B2 B2 B2 B2 B1 B1 B1 B1 B1 SC B1 B1 SC SC POP 12HR 50 50 40 40 30 20 20 20 RAIN SHWRS C C C C C C C C C S S S S S S S TSTMS S S S S S S S S S S S S S $$ MPZ001-120600- ROTA INTERNATIONAL AIRPORT-SINAPALU MP 14.17N 145.23E ELEV. 592 FT 411 AM CHST SUN OCT 12 2025 DATE SUN 10/12/25 MON 10/13/25 TUE 10/14/25 CHST3HRLY 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 UTC 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 MAX/MIN 88 75 87 75 85 TEMP 76 83 87 87 84 81 78 76 76 82 87 86 84 81 78 76 76 81 85 84 DEWPT 76 77 77 77 77 78 78 76 76 78 78 78 78 78 78 76 76 78 78 78 RH 100 82 72 72 80 91100100100 88 75 77 82 91100100100 91 80 82 WIND DIR NE E E E E E E E E E E E E E E E E E E E WIND SPD 9 11 10 9 9 8 8 6 10 11 12 12 13 11 11 9 12 14 14 14 CLOUDS SC SC SC SC SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B2 B2 B2 B2 POP 12HR 20 20 20 30 50 QPF 12HR 0.06 0.06 0.12 0.18 0.32 RAIN SHWRS S S S S S S S S S S S S C C C C C C C C TSTMS S S S S HEAT INDEX 91 99 98 94 89 92100 99 95 89 89 97 95 MAX HEAT 91 99 97 85 92 100 98 85 89 97 DATE WED 10/15/25 THU 10/16/25 FRI 10/17/25 SAT 10/18/25 CHST6HRLY 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 MIN/MAX 75 85 75 85 75 87 79 87 TEMP 80 76 81 84 80 76 81 84 80 76 82 87 83 79 84 87 DEWPT 78 76 78 78 79 76 79 79 80 76 79 79 79 79 79 79 PWIND DIR E SE SE SE SE E E E WIND CHAR GN GN GN GN LT GN GN GN AVG CLOUDS B2 B2 B2 B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 SC POP 12HR 50 50 50 50 30 20 20 20 RAIN SHWRS C C C C C C C C C S S S S S S S TSTMS S S S S S S S S S S S $$ MPZ002-120600- TINIAN-SAN JOSE MP 14.97N 145.63E ELEV. 74 FT 411 AM CHST SUN OCT 12 2025 DATE SUN 10/12/25 MON 10/13/25 TUE 10/14/25 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 89 78 89 78 88 TEMP 79 85 89 88 86 83 80 79 79 85 89 88 86 83 80 79 79 84 88 87 DEWPT 77 77 77 77 77 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 RH 94 77 68 70 75 85 94 97 97 80 70 72 77 85 94 97 97 82 72 75 WIND DIR NE E E E E E E E E E E E E E E E E E E E WIND SPD 10 11 10 11 10 9 8 8 11 12 13 12 14 12 11 10 12 14 17 16 CLOUDS SC SC SC SC SC SC SC SC SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 POP 12HR 20 20 20 30 40 QPF 12HR 0.07 0.08 0.09 0.18 0.22 RAIN SHWRS S S S S S S S S S S S S C C C C C C C C HEAT INDEX 84 94101100 97 93 88 84 95102101 98 93 88 95101100 MAX HEAT 94 101 99 91 95 102 100 91 95 101 DATE WED 10/15/25 THU 10/16/25 FRI 10/17/25 SAT 10/18/25 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 88 78 88 78 88 79 88 TEMP 83 79 84 87 83 79 84 87 83 79 84 87 83 80 84 87 DEWPT 78 78 78 78 79 79 79 79 80 79 79 79 79 79 79 79 PWIND DIR E E SE SE E E E E WIND CHAR GN GN GN GN GN GN GN GN AVG CLOUDS B2 B2 OV OV OV OV B2 B1 B1 B1 B1 B1 B1 B1 B1 SC POP 12HR 50 60 60 60 30 30 20 20 RAIN SHWRS C C L L L L L C C C C S S S S S TSTMS S S S S S S S S S S S $$ MPZ003-120600- SAIPAN INTERNATIONAL AIRPORT-OBYAN MP 15.11N 145.72E ELEV. 215 FT 411 AM CHST SUN OCT 12 2025 DATE SUN 10/12/25 MON 10/13/25 TUE 10/14/25 CHST3HRLY 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 UTC 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 MAX/MIN 89 78 89 78 88 TEMP 79 84 89 88 86 83 80 78 79 84 89 88 86 83 80 78 79 84 88 87 DEWPT 77 77 77 77 77 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 RH 94 80 68 70 75 85 94100 97 82 70 72 77 85 94100 97 82 72 75 WIND DIR NE E E E E E E E E E E E E E E E E E E E WIND SPD 9 11 10 11 10 9 8 8 11 11 13 12 13 12 11 10 12 14 17 14 CLOUDS SC SC SC SC SC SC SC SC SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 POP 12HR 20 20 20 30 30 QPF 12HR 0.07 0.06 0.09 0.18 0.21 RAIN SHWRS S S S S S S S S S S S S C C C C C C C C HEAT INDEX 95101101 97 92 87 95102101 98 93 87 94101100 MAX HEAT 95 101 100 91 95 102 101 91 94 101 DATE WED 10/15/25 THU 10/16/25 FRI 10/17/25 SAT 10/18/25 CHST6HRLY 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 MIN/MAX 78 88 78 88 78 88 79 88 TEMP 82 78 84 87 82 78 84 87 82 78 84 87 83 80 84 87 DEWPT 78 78 78 78 79 78 79 79 80 78 79 79 79 79 79 79 PWIND DIR E E SE SE E E E E WIND CHAR GN GN GN GN GN GN GN GN AVG CLOUDS B2 B2 OV OV OV OV B2 B1 B1 B1 B1 B1 B1 B1 B1 SC POP 12HR 50 60 60 60 30 30 20 20 RAIN SHWRS C C L L L L L C C C C S S S S S TSTMS S S S S S S S S S S S $$