Point Forecast Matrices
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
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658 FOMY50 PGUM 171740 PFMGUM POINT FORECAST MATRICES NATIONAL WEATHER SERVICE TIYAN GU 331 AM CHST MON AUG 18 2025 GUZ001-180600- GUAM INTERNATIONAL AIRPORT-TIYAN GU 13.48N 144.79E ELEV. 248 FT 331 AM CHST MON AUG 18 2025 DATE MON 08/18/25 TUE 08/19/25 WED 08/20/25 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 78 88 78 88 TEMP 78 79 84 88 87 85 83 80 79 79 84 88 87 85 83 80 79 79 84 88 87 DEWPT 79 79 79 79 79 79 79 79 79 78 78 78 77 78 78 78 78 78 78 78 77 RH 103100 85 75 77 82 88 97100 97 82 72 72 80 85 94 97 97 82 72 72 WIND DIR E E E E E E E E E E SE S SE SE SE SE S S SW N N WIND SPD 8 9 12 11 10 10 9 9 9 12 16 12 9 8 6 5 4 1 1 1 3 CLOUDS B1 B1 B1 B1 B1 SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 POP 12HR 30 20 30 40 40 QPF 12HR 0.12 0.02 0.23 0.37 0.11 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 S S S S S S S S S S S S HEAT INDEX 95102101 98 93 88 95101 99 97 92 87 94100 99 MAX HEAT 95 102 100 92 95 101 99 91 94 100 DATE THU 08/21/25 FRI 08/22/25 SAT 08/23/25 SUN 08/24/25 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 88 78 88 78 88 78 86 TEMP 83 79 84 87 83 79 84 87 83 79 84 87 82 79 83 86 DEWPT 78 78 78 77 78 78 77 77 78 78 78 78 78 78 78 78 PWIND DIR NE E NE E E E E E WIND CHAR LT LT GN GN LT LT LT LT AVG CLOUDS B1 B1 B1 B1 B1 SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 POP 12HR 30 30 20 20 30 30 20 20 RAIN SHWRS C C C S S S S S C C C S S S S S TSTMS S S S S S S S S S S S S S S S S $$ MPZ001-180600- ROTA INTERNATIONAL AIRPORT-SINAPALU MP 14.17N 145.23E ELEV. 592 FT 331 AM CHST MON AUG 18 2025 DATE MON 08/18/25 TUE 08/19/25 WED 08/20/25 CHST3HRLY 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 UTC 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 MAX/MIN 87 78 87 78 87 TEMP 78 79 83 87 86 84 82 80 79 79 83 87 86 84 82 80 79 79 83 87 86 DEWPT 79 79 79 79 79 79 79 79 79 79 78 78 78 78 78 78 78 78 78 78 78 RH 103100 88 77 80 85 91 97100100 85 75 77 82 88 94 97 97 85 75 77 WIND DIR E E E E E E E E E E SE S S SE E SE S S SE S E WIND SPD 9 10 13 11 11 11 11 11 11 13 12 13 11 8 5 8 8 8 4 3 1 CLOUDS B1 SC SC SC SC SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 POP 12HR 30 20 40 40 30 QPF 12HR 0.05 0.02 0.26 0.38 0.15 RAIN SHWRS C S S S S S S S S C C C C C C C C S S S S TSTMS S S S S S S S S S S S S S S S S S S S S S HEAT INDEX 94100 99 97 93 86 94 99 98 95 91 86 93 99 98 MAX HEAT 94 100 99 91 94 99 97 90 93 99 DATE THU 08/21/25 FRI 08/22/25 SAT 08/23/25 SUN 08/24/25 CHST6HRLY 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 MIN/MAX 78 87 78 86 78 86 78 85 TEMP 82 79 83 86 82 79 83 86 82 78 83 85 82 78 82 85 DEWPT 78 78 78 77 78 77 77 77 78 78 78 78 78 78 78 78 PWIND DIR E E E E E E E E WIND CHAR LT LT GN GN LT LT LT LT AVG CLOUDS B1 B1 B1 SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 POP 12HR 30 30 20 20 20 20 20 20 RAIN SHWRS C C C S S S S S S S S S S S S S TSTMS S S S S S S S S S S S S S S S S $$ MPZ002-180600- TINIAN-SAN JOSE MP 14.97N 145.63E ELEV. 74 FT 331 AM CHST MON AUG 18 2025 DATE MON 08/18/25 TUE 08/19/25 WED 08/20/25 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 78 88 78 88 TEMP 78 79 84 87 87 85 82 80 79 79 84 87 87 85 82 80 79 79 84 87 87 DEWPT 79 79 79 79 78 79 79 79 79 79 79 78 78 78 78 78 78 78 78 78 77 RH 103100 85 77 75 82 91 97100100 85 75 75 80 88 94 97 97 82 75 72 WIND DIR E E E E E E E E E E SE SE S SE S S SE S S S S WIND SPD 8 10 12 10 11 12 11 10 10 12 13 11 6 11 6 6 4 6 5 3 1 CLOUDS B1 SC SC SC SC SC SC SC SC B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 POP 12HR 20 20 40 40 30 QPF 12HR 0.07 0.05 0.32 0.38 0.19 RAIN SHWRS S 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 S S S S S S S S S S S S HEAT INDEX 95101100 98 93 89 95101100 96 92 87 94100 99 MAX HEAT 95 101 100 92 95 101 99 90 94 100 DATE THU 08/21/25 FRI 08/22/25 SAT 08/23/25 SUN 08/24/25 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 88 78 88 78 88 78 87 TEMP 82 79 84 87 82 79 84 87 83 79 84 87 83 79 83 86 DEWPT 78 78 78 77 78 77 77 77 78 78 78 78 78 78 78 78 PWIND DIR E E E E E E E E WIND CHAR LT LT GN GN GN LT LT GN AVG CLOUDS B1 B1 SC SC SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 POP 12HR 20 20 20 20 20 20 20 20 RAIN SHWRS S S S S S S S S S S S S S S S S TSTMS S S S S S S S S S S S S S S S S $$ MPZ003-180600- SAIPAN INTERNATIONAL AIRPORT-OBYAN MP 15.11N 145.72E ELEV. 215 FT 331 AM CHST MON AUG 18 2025 DATE MON 08/18/25 TUE 08/19/25 WED 08/20/25 CHST3HRLY 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 UTC 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 MAX/MIN 88 78 88 78 88 TEMP 78 79 84 88 87 85 83 80 79 79 84 88 87 85 83 80 79 79 84 88 87 DEWPT 79 79 79 79 79 79 79 79 79 79 79 78 78 78 78 78 78 78 78 78 77 RH 103100 85 75 77 82 88 97100100 85 72 75 80 85 94 97 97 82 72 72 WIND DIR E E E E E E E E E E SE SE SE SE S S SE S S S SE WIND SPD 8 10 12 10 12 12 11 10 10 12 13 10 6 10 6 6 3 5 5 3 2 CLOUDS SC SC SC SC SC SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 POP 12HR 20 20 40 40 30 QPF 12HR 0.09 0.07 0.29 0.35 0.19 RAIN SHWRS S S S S S S S S S C C C C C C C C S S S S TSTMS S S S S S S S S S S S S S S S S S S S S S HEAT INDEX 95102101 98 94 89 95102100 97 92 87 94100 99 MAX HEAT 95 102 100 92 95 102 99 90 94 100 DATE THU 08/21/25 FRI 08/22/25 SAT 08/23/25 SUN 08/24/25 CHST6HRLY 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 MIN/MAX 78 88 78 88 78 88 78 86 TEMP 83 79 84 87 83 79 84 87 83 79 84 87 83 79 83 86 DEWPT 78 78 77 77 78 77 78 77 78 78 78 78 78 78 78 78 PWIND DIR E E E E E E E E WIND CHAR LT LT GN GN GN LT LT GN AVG CLOUDS B1 B1 SC SC SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 POP 12HR 20 20 20 20 20 20 20 20 RAIN SHWRS S S S S S S S S S S S S S S S S TSTMS S S S S S S S S S S S S S S S S $$