Point Forecast Matrices
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
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244 FOMY50 PGUM 180520 PFMGUM POINT FORECAST MATRICES NATIONAL WEATHER SERVICE TIYAN GU 316 PM CHST MON AUG 18 2025 GUZ001-181800- GUAM INTERNATIONAL AIRPORT-TIYAN GU 13.48N 144.79E ELEV. 248 FT 316 PM CHST MON AUG 18 2025 DATE MON 08/18/25 TUE 08/19/25 WED 08/20/25 THU 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 76 87 78 88 78 TEMP 87 85 82 78 77 77 83 87 86 84 82 80 79 79 84 88 87 85 83 80 79 DEWPT 79 79 79 78 77 77 78 78 77 78 78 78 78 78 78 78 77 77 78 78 78 RH 77 82 91100100100 85 75 75 82 88 94 97 97 82 72 72 77 85 94 97 WIND DIR E E E E E E SE SE SE SE SE S SE E SE E E NE NE NE NE WIND SPD 10 12 9 10 8 10 12 11 10 9 8 4 4 5 6 5 4 4 4 5 6 CLOUDS B1 B1 B1 OV OV OV OV B1 B1 B1 B1 B1 B1 SC SC SC SC SC SC SC SC POP 12HR 80 80 40 40 20 QPF 12HR 0.33 0.25 0.21 0.09 0.06 RAIN SHWRS S C C O O L L C C C C C C 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 S S S S S HEAT INDEX 101 97 91 92 99 98 95 91 86 94100 99 96 92 87 MAX HEAT 102 100 89 92 99 97 90 94 100 98 90 DATE 08/21/25 FRI 08/22/25 SAT 08/23/25 SUN 08/24/25 MON 08/25/25 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 80 89 TEMP 84 87 83 79 84 87 83 79 84 87 82 79 83 86 83 81 85 88 DEWPT 78 77 78 78 77 77 78 78 78 78 78 78 78 78 77 77 77 77 PWIND DIR NE E E E E E E E E WIND CHAR LT GN GN LT LT LT LT LT LT AVG CLOUDS SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 POP 12HR 20 30 30 30 30 30 20 30 30 RAIN SHWRS S S C C C C C S C C C S S S C C C C TSTMS S S S S S S S S S S S S S S S S S S $$ MPZ001-181800- ROTA INTERNATIONAL AIRPORT-SINAPALU MP 14.17N 145.23E ELEV. 592 FT 316 PM CHST MON AUG 18 2025 DATE MON 08/18/25 TUE 08/19/25 WED 08/20/25 THU CHST3HRLY 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 UTC 3HRLY 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 MIN/MAX 77 87 78 87 78 TEMP 86 84 82 79 78 78 83 87 86 84 82 80 79 79 83 87 86 84 82 80 79 DEWPT 79 79 79 79 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 RH 80 85 91100100100 85 75 77 82 88 94 97 97 85 75 77 82 88 94 97 WIND DIR E E E E E E SE SE SE SE SE SW SE SE E E E NE E E E WIND SPD 11 17 14 16 16 16 16 14 13 13 12 3 5 6 9 9 9 8 5 5 6 CLOUDS SC B1 B1 OV OV B2 B2 B1 B1 B1 B1 B1 B1 SC SC SC SC SC SC SC SC POP 12HR 60 60 40 30 20 QPF 12HR 0.18 0.43 0.29 0.11 0.06 RAIN SHWRS S C C L L L L C C C C C C S S S S S S S S TSTMS S S S S S S S S S S S S S S S S S S S S S HEAT INDEX 99 96 92 93 99 98 95 91 86 93 99 98 95 91 86 MAX HEAT 100 99 90 93 99 97 90 93 99 97 89 DATE 08/21/25 FRI 08/22/25 SAT 08/23/25 SUN 08/24/25 MON 08/25/25 CHST6HRLY 10 16 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6HRLY 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 MAX/MIN 87 78 86 78 86 78 85 81 87 TEMP 83 86 82 79 83 86 82 78 83 85 82 78 82 85 83 81 84 86 DEWPT 78 77 78 77 77 77 78 78 78 78 78 78 78 78 77 77 77 77 PWIND DIR E E E E E E E E E WIND CHAR GN GN GN LT LT LT GN GN LT AVG CLOUDS SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 POP 12HR 20 20 30 30 20 20 20 30 30 RAIN SHWRS S S S S C C C S S S S S S S C C C S TSTMS S S S S S S S S S S S S S S S S S S $$ MPZ002-181800- TINIAN-SAN JOSE MP 14.97N 145.63E ELEV. 74 FT 316 PM CHST MON AUG 18 2025 DATE MON 08/18/25 TUE 08/19/25 WED 08/20/25 THU 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 88 78 88 78 TEMP 87 85 82 79 78 78 83 87 87 85 82 80 79 79 84 87 87 85 82 80 79 DEWPT 78 79 79 79 78 78 79 78 78 78 78 78 78 78 78 78 77 78 78 78 78 RH 75 82 91100100100 88 75 75 80 88 94 97 97 82 75 72 80 88 94 97 WIND DIR E E E E E E E E SE SE SE SE SE SE SE E E E E E E WIND SPD 11 18 13 14 14 16 17 16 14 14 12 9 5 8 8 8 8 6 5 6 8 CLOUDS SC B1 B1 OV OV B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 SC SC SC SC POP 12HR 60 60 30 30 20 QPF 12HR 0.13 0.26 0.15 0.13 0.03 RAIN SHWRS S S S L L C C C C C C C C 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 S S S S S HEAT INDEX 100 97 92 84 94101100 96 92 87 94100 99 96 92 87 MAX HEAT 101 100 91 94 101 99 90 94 100 98 90 DATE 08/21/25 FRI 08/22/25 SAT 08/23/25 SUN 08/24/25 MON 08/25/25 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 87 81 89 TEMP 84 87 82 79 84 87 83 79 84 87 83 79 83 86 83 81 85 88 DEWPT 78 77 78 77 77 77 78 78 78 78 78 78 78 78 77 77 77 77 PWIND DIR E E E E E E E E E WIND CHAR GN GN GN LT GN LT GN GN GN AVG CLOUDS SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 POP 12HR 20 20 20 20 20 30 30 30 30 RAIN SHWRS S S S S S S S S S S C C C S C C C C TSTMS S S S S S S S S S S S S S S S S S S $$ MPZ003-181800- SAIPAN INTERNATIONAL AIRPORT-OBYAN MP 15.11N 145.72E ELEV. 215 FT 316 PM CHST MON AUG 18 2025 DATE MON 08/18/25 TUE 08/19/25 WED 08/20/25 THU CHST3HRLY 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 UTC 3HRLY 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 MIN/MAX 77 88 78 88 78 TEMP 87 85 82 79 78 78 84 88 87 85 83 80 79 79 84 88 87 85 83 80 79 DEWPT 79 79 79 79 78 78 79 78 78 78 78 78 78 78 78 78 77 78 78 78 78 RH 77 82 91100100100 85 72 75 80 85 94 97 97 82 72 72 80 85 94 97 WIND DIR E E E E E E E E SE SE SE SE SE SE SE E E NE E E E WIND SPD 12 17 13 14 14 14 16 16 13 12 11 8 5 8 9 10 9 6 5 5 8 CLOUDS SC B1 B1 OV OV B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 SC SC SC SC POP 12HR 60 60 30 30 20 QPF 12HR 0.12 0.24 0.15 0.11 0.03 RAIN SHWRS S S S L L C C C C C C C C S S S S S S S S TSTMS S S S S S S S S S S S S S S S S S S S S S HEAT INDEX 101 97 93 84 95102100 97 92 87 94100 99 96 92 87 MAX HEAT 101 100 91 95 102 99 90 94 100 98 90 DATE 08/21/25 FRI 08/22/25 SAT 08/23/25 SUN 08/24/25 MON 08/25/25 CHST6HRLY 10 16 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6HRLY 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 MAX/MIN 88 78 88 78 88 78 86 80 88 TEMP 84 87 83 79 84 87 83 79 84 87 83 79 83 86 83 81 85 88 DEWPT 77 77 78 77 78 77 78 78 78 78 78 78 78 78 77 77 77 77 PWIND DIR E E E E E E E E E WIND CHAR GN GN GN LT GN LT GN GN GN AVG CLOUDS SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 POP 12HR 20 20 20 20 20 30 30 30 30 RAIN SHWRS S S S S S S S S S S C C C S C C C C TSTMS S S S S S S S S S S S S S S S S S S $$