Point Forecast Matrices
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
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670 FOMY50 PGUM 171810 PFMGUM POINT FORECAST MATRICES NATIONAL WEATHER SERVICE TIYAN GU 400 AM CHST SAT OCT 18 2025 GUZ001-180600- GUAM INTERNATIONAL AIRPORT-TIYAN GU 13.48N 144.79E ELEV. 248 FT 400 AM CHST SAT OCT 18 2025 DATE SAT 10/18/25 SUN 10/19/25 MON 10/20/25 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 87 78 88 77 86 TEMP 78 79 83 87 86 85 82 80 78 79 84 87 87 85 82 79 78 78 83 86 85 DEWPT 78 79 79 79 79 80 80 79 78 79 78 79 78 79 79 79 78 78 79 79 78 RH 100100 88 77 80 85 94 97100100 82 77 75 82 91100100100 88 80 80 WIND DIR E E E E E E E E E E E E E NE E E E E E E E WIND SPD 6 6 13 13 13 13 10 10 10 11 13 12 12 11 9 6 5 5 11 10 9 CLOUDS B1 B2 B2 B2 B2 SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 POP 12HR 40 40 20 40 40 QPF 12HR 0.05 0.01 0.03 0.16 0.13 RAIN SHWRS C C C C C S S S S S S S S C C C C C C C C HEAT INDEX 95102101 98 93 86 95101100 97 92 85 93 99 98 MAX HEAT 95 102 100 91 95 101 99 90 93 99 DATE TUE 10/21/25 WED 10/22/25 THU 10/23/25 FRI 10/24/25 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 87 77 87 77 87 77 87 TEMP 82 78 83 86 81 77 83 86 81 77 83 86 81 77 83 86 DEWPT 79 78 78 78 79 77 79 79 79 77 79 79 79 77 79 79 PWIND DIR E SE SE SE SE SE E E WIND CHAR GN GN GN GN GN GN GN GN AVG CLOUDS B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 POP 12HR 40 30 30 30 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 S $$ MPZ001-180600- ROTA INTERNATIONAL AIRPORT-SINAPALU MP 14.17N 145.23E ELEV. 592 FT 400 AM CHST SAT OCT 18 2025 DATE SAT 10/18/25 SUN 10/19/25 MON 10/20/25 CHST3HRLY 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 UTC 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 MAX/MIN 85 75 86 76 85 TEMP 76 77 81 85 84 82 80 77 76 76 82 86 85 83 81 78 77 77 81 85 84 DEWPT 76 77 79 79 79 79 79 77 76 76 79 79 78 79 79 78 77 77 79 79 79 RH 100100 94 82 85 91 97100100100 91 80 80 88 94100100100 94 82 85 WIND DIR E E E E E E E E E E E E E E E E E E E E E WIND SPD 8 13 13 16 13 14 14 12 11 13 16 13 13 14 12 10 8 11 12 13 13 CLOUDS B1 B2 B2 B2 B2 SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 POP 12HR 40 40 20 40 40 QPF 12HR 0.11 0.02 0.05 0.29 0.20 RAIN SHWRS C C C C C S S S S S S S S C C C C C C C C HEAT INDEX 91 98 97 93 86 91 98 97 94 89 91 97 96 MAX HEAT 91 98 96 91 98 97 86 91 97 DATE TUE 10/21/25 WED 10/22/25 THU 10/23/25 FRI 10/24/25 CHST6HRLY 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 MIN/MAX 76 86 76 86 76 86 76 86 TEMP 80 77 82 85 81 77 82 85 81 77 82 85 81 77 82 85 DEWPT 79 77 79 79 79 77 79 79 79 77 79 79 79 77 79 79 PWIND DIR E SE SE SE SE SE E E WIND CHAR GN GN GN GN GN GN GN GN AVG CLOUDS B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 POP 12HR 40 30 30 30 30 30 30 30 RAIN SHWRS C C C C C C C C C C C C C C C C TSTMS S S S S $$ MPZ002-180600- TINIAN-SAN JOSE MP 14.97N 145.63E ELEV. 74 FT 400 AM CHST SAT OCT 18 2025 DATE SAT 10/18/25 SUN 10/19/25 MON 10/20/25 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 79 87 79 86 TEMP 79 80 84 88 87 85 83 81 80 80 84 87 86 85 83 81 79 80 83 86 85 DEWPT 79 79 79 79 79 79 79 79 79 78 78 78 78 79 79 79 79 79 79 79 79 RH 100 97 85 75 77 82 88 94 97 94 82 75 77 82 88 94100 97 88 80 82 WIND DIR E E E E E E E E E E E E E E E E E E E E E WIND SPD 13 13 14 16 16 17 16 12 11 13 16 14 13 14 12 11 9 11 12 12 12 CLOUDS B1 B1 B1 B1 B1 SC SC SC SC B1 B1 B1 B1 B2 B2 B2 B2 B1 B1 B1 B1 POP 12HR 40 40 20 40 40 QPF 12HR 0.02 0 0.17 0.49 0.26 RAIN SHWRS C C C C C S S S S S S S S C C C C C C C C HEAT INDEX 85 86 96102101 99 95 90 85 86 95100 99 97 94 90 85 86 94 99 98 MAX HEAT 85 96 102 100 93 95 100 99 92 94 99 DATE TUE 10/21/25 WED 10/22/25 THU 10/23/25 FRI 10/24/25 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 79 87 79 87 79 87 79 87 TEMP 82 79 84 86 83 79 84 86 83 79 84 86 83 79 84 86 DEWPT 79 79 79 78 79 79 79 79 79 79 79 78 79 79 79 79 PWIND DIR E E SE SE SE SE E E WIND CHAR GN GN GN GN GN GN GN GN AVG CLOUDS B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 POP 12HR 40 30 30 30 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 S $$ MPZ003-180600- SAIPAN INTERNATIONAL AIRPORT-OBYAN MP 15.11N 145.72E ELEV. 215 FT 400 AM CHST SAT OCT 18 2025 DATE SAT 10/18/25 SUN 10/19/25 MON 10/20/25 CHST3HRLY 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 UTC 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 MAX/MIN 88 79 88 79 87 TEMP 79 80 84 88 87 85 83 81 79 80 84 88 87 85 83 81 79 80 84 87 86 DEWPT 79 79 79 79 79 79 79 79 79 78 79 79 79 79 79 79 79 79 79 79 79 RH 100 97 85 75 77 82 88 94100 94 85 75 77 82 88 94100 97 85 77 80 WIND DIR E E E NE E E E E E E E E E E E E E E E E E WIND SPD 12 13 14 12 17 17 16 12 11 13 16 14 14 16 13 11 10 11 13 12 12 CLOUDS B1 B1 B1 B1 B1 SC SC SC SC B1 B1 B1 B1 B2 B2 B2 B2 B1 B1 B1 B1 POP 12HR 40 40 20 40 40 QPF 12HR 0.07 0.01 0.19 0.57 0.28 RAIN SHWRS C C C C C S S S S S S S S C C C C C C C C HEAT INDEX 85 86 96102101 99 94 89 84 85 96102101 98 94 89 84 85 95101100 MAX HEAT 85 96 102 101 92 96 102 100 92 95 101 DATE TUE 10/21/25 WED 10/22/25 THU 10/23/25 FRI 10/24/25 CHST6HRLY 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 MIN/MAX 78 87 77 87 77 87 77 87 TEMP 82 79 83 86 82 77 83 86 82 78 83 86 82 78 83 86 DEWPT 79 79 79 78 79 77 79 79 79 78 79 78 79 78 79 79 PWIND DIR E E SE SE SE SE E E WIND CHAR GN GN GN GN GN GN GN GN AVG CLOUDS B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 POP 12HR 40 30 30 30 30 30 30 30 RAIN SHWRS C C C C C C C C C C C C C C C C TSTMS S S S S $$