Point Forecast Matrices
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
Versions:
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520 FOMY50 PGUM 260430 PFMGUM POINT FORECAST MATRICES NATIONAL WEATHER SERVICE TIYAN GU 226 PM CHST FRI SEP 26 2025 GUZ001-261800- GUAM INTERNATIONAL AIRPORT-TIYAN GU 13.48N 144.79E ELEV. 248 FT 226 PM CHST FRI SEP 26 2025 DATE FRI 09/26/25 SAT 09/27/25 SUN 09/28/25 MON 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 88 78 88 77 TEMP 86 85 82 80 78 79 84 87 87 85 82 80 78 79 84 87 87 85 82 79 78 DEWPT 77 77 77 77 77 77 77 77 77 77 78 78 78 78 78 78 78 78 79 78 78 RH 75 77 85 91 97 94 80 72 72 77 88 94100 97 82 75 75 80 91 97100 WIND DIR S S S SE SE E E E E E E E E E E E E E E E E WIND SPD 9 8 6 5 5 6 8 9 10 10 10 10 10 10 11 11 11 10 10 9 9 CLOUDS B1 B1 B1 B1 B1 B1 B1 B1 B1 B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 POP 12HR 30 40 50 50 40 QPF 12HR 0.07 0.09 0.16 0.07 0.25 RAIN SHWRS C S S S S 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 S S S S HEAT INDEX 97 94 90 84 93 99 98 95 91 85 94100 99 96 92 85 MAX HEAT 98 97 88 93 99 97 90 94 100 99 90 HIGH SURF Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y DATE 09/29/25 TUE 09/30/25 WED 10/01/25 THU 10/02/25 FRI 10/03/25 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 87 78 87 77 87 78 86 TEMP 82 85 81 78 83 86 82 78 83 86 82 78 83 86 82 79 83 85 DEWPT 78 78 78 78 78 78 79 79 78 78 79 79 79 78 79 79 78 78 PWIND DIR E E E E E NE E E SE WIND CHAR GN GN GN GN GN GN GN GN GN AVG CLOUDS B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 POP 12HR 40 40 40 30 30 30 30 30 40 RAIN SHWRS C C C C C S C C C C C C C C C C C C TSTMS S S S S S $$ MPZ001-261800- ROTA INTERNATIONAL AIRPORT-SINAPALU MP 14.17N 145.23E ELEV. 592 FT 226 PM CHST FRI SEP 26 2025 DATE FRI 09/26/25 SAT 09/27/25 SUN 09/28/25 MON CHST3HRLY 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 UTC 3HRLY 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 MIN/MAX 77 85 76 85 76 TEMP 84 83 81 78 77 77 82 85 85 83 80 78 77 77 81 85 84 82 80 78 76 DEWPT 77 77 77 77 77 77 77 77 77 77 78 78 78 78 78 78 78 79 79 79 78 RH 80 82 88 97100100 85 77 77 82 94100103103 91 80 82 91 97103107 WIND DIR S S SE SE SE E E E E E E E E E E E E E E E E WIND SPD 10 9 9 8 8 8 10 10 11 12 13 13 13 13 13 13 12 12 13 13 12 CLOUDS B1 B1 B1 B1 B1 B1 B1 B1 B1 B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 POP 12HR 30 40 40 40 40 QPF 12HR 0.08 0.27 0.20 0.20 0.38 RAIN SHWRS S C C C C C C C C C C C C C C C C C C C C TSTMS S S S S S S S S S S S S S S S S S S S S HEAT INDEX 94 91 87 90 96 95 92 88 90 96 95 92 88 MAX HEAT 95 93 85 90 96 94 85 90 96 95 84 HIGH SURF Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y DATE 09/29/25 TUE 09/30/25 WED 10/01/25 THU 10/02/25 FRI 10/03/25 CHST6HRLY 10 16 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6HRLY 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 MAX/MIN 85 76 86 76 85 77 85 78 85 TEMP 81 84 80 77 82 85 81 77 82 84 81 77 82 84 81 78 82 85 DEWPT 78 78 78 78 78 78 79 79 79 79 79 79 79 78 79 78 78 78 PWIND DIR E E E E E E E E E WIND CHAR GN GN GN GN GN GN GN GN GN AVG CLOUDS B2 B2 B1 B1 B1 SC B1 B1 B1 B1 B1 B1 B1 B2 B1 B1 B1 B1 POP 12HR 40 40 30 30 30 30 40 40 40 RAIN SHWRS C C C C C S C C C C C C C C C C C C TSTMS S S S $$ MPZ002-261800- TINIAN-SAN JOSE MP 14.97N 145.63E ELEV. 74 FT 226 PM CHST FRI SEP 26 2025 DATE FRI 09/26/25 SAT 09/27/25 SUN 09/28/25 MON 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 79 87 79 87 78 TEMP 85 84 82 80 79 80 84 87 86 85 83 81 79 80 83 86 86 84 82 80 79 DEWPT 76 76 77 77 77 77 77 77 77 77 78 78 78 78 78 78 78 78 79 79 79 RH 75 77 85 91 94 91 80 72 75 77 85 91 97 94 85 77 77 82 91 97100 WIND DIR S SE SE SE E E E E E E E E E E E E E E E E E WIND SPD 10 10 10 9 8 9 10 10 11 12 13 13 13 13 13 13 12 13 13 13 13 CLOUDS SC SC SC SC SC B1 B1 B1 B1 B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 POP 12HR 20 30 50 50 40 QPF 12HR 0.06 0.07 0.19 0.13 0.41 RAIN SHWRS S S S S S 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 S S S HEAT INDEX 95 93 90 87 84 93 98 97 95 92 88 84 85 94 99 98 96 92 88 MAX HEAT 96 95 89 93 98 96 90 94 99 97 91 HIGH SURF Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y DATE 09/29/25 TUE 09/30/25 WED 10/01/25 THU 10/02/25 FRI 10/03/25 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 85 79 86 TEMP 83 86 83 79 84 87 83 79 84 86 83 79 83 85 82 79 83 85 DEWPT 78 78 79 78 78 78 79 79 78 78 79 79 79 78 79 79 78 78 PWIND DIR E E E E E E E E E WIND CHAR GN GN GN GN GN GN GN GN GN AVG CLOUDS B1 B1 B1 B1 SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 POP 12HR 40 30 30 20 30 30 40 40 40 RAIN SHWRS C C C C C S S S C C C C C C C C C C TSTMS S S S S S S S S $$ MPZ003-261800- SAIPAN INTERNATIONAL AIRPORT-OBYAN MP 15.11N 145.72E ELEV. 215 FT 226 PM CHST FRI SEP 26 2025 DATE FRI 09/26/25 SAT 09/27/25 SUN 09/28/25 MON CHST3HRLY 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 UTC 3HRLY 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 MIN/MAX 78 88 78 88 78 TEMP 87 85 83 80 78 79 84 88 87 85 83 80 79 79 84 88 87 85 82 80 78 DEWPT 76 76 77 77 77 77 77 77 77 77 78 78 78 78 78 78 78 78 79 79 79 RH 70 75 82 91 97 94 80 70 72 77 85 94 97 97 82 72 75 80 91 97103 WIND DIR S SE SE SE E E E E E E E E E E E E E E E E E WIND SPD 10 9 10 9 9 9 10 10 11 12 13 13 13 13 13 13 12 13 13 13 13 CLOUDS SC SC SC SC SC B1 B1 B1 B1 B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 POP 12HR 20 30 50 50 40 QPF 12HR 0.06 0.06 0.18 0.13 0.37 RAIN SHWRS S S S S S C C C C C C C C C C C C C C C C TSTMS S S S S S S S S S S S S S S S S HEAT INDEX 98 95 91 86 94100 99 96 92 87 84 95101100 97 92 86 MAX HEAT 99 97 89 94 100 98 90 95 101 100 91 HIGH SURF Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y DATE 09/29/25 TUE 09/30/25 WED 10/01/25 THU 10/02/25 FRI 10/03/25 CHST6HRLY 10 16 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6HRLY 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 MAX/MIN 88 78 88 78 88 78 86 78 86 TEMP 84 87 82 79 84 87 82 78 84 87 83 79 83 85 82 79 83 85 DEWPT 78 78 79 78 78 79 79 79 79 79 79 79 79 79 79 79 79 78 PWIND DIR E E E E E E E E E WIND CHAR GN GN GN GN GN GN GN GN GN AVG CLOUDS B1 B1 B1 B1 SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 POP 12HR 40 30 20 20 30 30 40 40 40 RAIN SHWRS C C C S S S S S C C C C C C C C C C TSTMS S S S S S S S S $$