


Point Forecast Matrices
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
221 FOMY50 PGUM 150640 PFMGUM POINT FORECAST MATRICES NATIONAL WEATHER SERVICE TIYAN GU 436 PM CHST WED OCT 15 2025 GUZ001-151800- GUAM INTERNATIONAL AIRPORT-TIYAN GU 13.48N 144.79E ELEV. 248 FT 436 PM CHST WED OCT 15 2025 DATE WED 10/15/25 THU 10/16/25 FRI 10/17/25 SAT 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 83 81 78 77 77 83 87 86 84 82 80 79 79 84 88 87 85 83 80 79 DEWPT 77 78 78 78 78 78 78 78 79 79 79 79 79 78 78 78 79 79 79 79 RH 82 91100103103 85 75 77 85 91 97100100 82 72 75 82 88 97100 WIND DIR E E E E E E E E E E E E E E E E E E E E WIND SPD 16 14 8 6 11 16 11 10 9 9 9 9 12 14 13 12 12 11 9 9 CLOUDS B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 SC SC SC SC SC SC SC SC POP 12HR 70 60 20 20 20 QPF 12HR 1.01 0.27 0.14 0.09 0.06 RAIN SHWRS L L L L 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 HEAT INDEX 93 88 92 99 99 96 92 86 95101100 98 94 89 MAX HEAT 96 96 85 92 100 98 91 95 101 100 92 DATE 10/18/25 SUN 10/19/25 MON 10/20/25 TUE 10/21/25 WED 10/22/25 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 87 78 88 80 88 TEMP 84 87 83 79 84 87 82 79 83 86 82 79 84 87 84 81 85 87 DEWPT 79 79 80 79 79 79 79 79 79 78 79 79 78 78 79 79 79 79 PWIND DIR E E E E E E SE SE SE WIND CHAR GN 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 B1 B1 POP 12HR 30 30 30 30 30 30 30 30 40 RAIN SHWRS C C C S C C C S 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 $$ MPZ001-151800- ROTA INTERNATIONAL AIRPORT-SINAPALU MP 14.17N 145.23E ELEV. 592 FT 436 PM CHST WED OCT 15 2025 DATE WED 10/15/25 THU 10/16/25 FRI 10/17/25 SAT CHST3HRLY 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 UTC 3HRLY 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 MIN/MAX 76 86 78 86 78 TEMP 83 81 78 77 77 82 86 85 84 82 80 78 79 83 86 85 84 82 80 78 DEWPT 77 78 78 78 78 78 78 78 79 79 79 79 79 79 78 78 79 79 79 79 RH 82 91100103103 88 77 80 85 91 97103100 88 77 80 85 91 97103 WIND DIR E E E E E E E E E E E E E E E E E E E E WIND SPD 16 13 10 10 13 16 13 12 11 10 11 11 13 16 13 13 13 11 10 9 CLOUDS B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 SC SC SC SC SC SC SC SC POP 12HR 70 60 20 20 20 QPF 12HR 0.84 0.34 0.16 0.09 0.05 RAIN SHWRS L L L L C C C C S S S S S S S S S S S S TSTMS S S S S S S S S S S S S HEAT INDEX 93 88 91 98 98 95 91 86 93 98 98 95 92 86 MAX HEAT 96 96 85 91 98 97 90 93 98 97 90 DATE 10/18/25 SUN 10/19/25 MON 10/20/25 TUE 10/21/25 WED 10/22/25 CHST6HRLY 10 16 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6HRLY 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 MAX/MIN 86 78 86 78 86 78 86 82 86 TEMP 83 85 82 78 83 85 82 78 83 85 82 78 83 86 84 82 84 85 DEWPT 79 79 80 79 79 79 79 79 78 79 79 79 79 78 79 79 79 79 PWIND DIR E E E E E E E SE SE WIND CHAR GN GN GN GN GN GN GN GN GN AVG CLOUDS B1 B1 B1 B1 B1 B1 B1 SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 POP 12HR 30 30 20 20 30 30 30 30 40 RAIN SHWRS C C C S S S S S C C C C C C C C C C TSTMS S S S S S S S S S S S S S S S S $$ MPZ002-151800- TINIAN-SAN JOSE MP 14.97N 145.63E ELEV. 74 FT 436 PM CHST WED OCT 15 2025 DATE WED 10/15/25 THU 10/16/25 FRI 10/17/25 SAT 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 87 78 87 78 TEMP 84 82 80 78 79 83 87 86 84 82 80 79 79 84 87 87 85 82 80 79 DEWPT 78 78 78 78 78 78 78 78 79 79 79 79 79 78 78 78 79 79 79 79 RH 82 88 94100 97 85 75 77 85 91 97100100 82 75 75 82 91 97100 WIND DIR NE E E E E E E E E E E E E E E E E E E E WIND SPD 13 11 12 8 9 14 14 16 14 12 10 10 13 16 13 13 13 11 10 10 CLOUDS B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 SC SC SC SC SC SC SC SC POP 12HR 50 40 20 20 20 QPF 12HR 0.56 0.20 0.13 0.07 0.08 RAIN SHWRS C C C C 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 WIND CHILL -120-120-120-120-120-120-120-120-120-120-120-120-120-120-120-120-120-120-120-120 MIN CHILL -120 -120 -120 -120 -120 -120 -120 -120 -120 -120 -120 DATE 10/18/25 SUN 10/19/25 MON 10/20/25 TUE 10/21/25 WED 10/22/25 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 87 78 87 78 87 80 86 TEMP 83 86 82 79 83 86 82 79 83 86 82 79 83 86 83 81 84 85 DEWPT 79 79 79 79 79 79 79 79 78 78 79 79 79 78 79 79 78 78 PWIND DIR E E E E E E E SE SE WIND CHAR GN 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 B1 B1 POP 12HR 20 20 20 20 30 30 30 30 40 RAIN SHWRS S S S S S S S S C C C S C C C C C C TSTMS S S S S S S S S S S S S S S S S $$ MPZ003-151800- SAIPAN INTERNATIONAL AIRPORT-OBYAN MP 15.11N 145.72E ELEV. 215 FT 436 PM CHST WED OCT 15 2025 DATE WED 10/15/25 THU 10/16/25 FRI 10/17/25 SAT CHST3HRLY 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 UTC 3HRLY 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 MIN/MAX 78 88 78 88 78 TEMP 85 82 80 79 79 84 88 87 85 83 80 79 79 84 88 87 85 83 80 79 DEWPT 78 78 78 78 78 78 78 78 79 79 79 79 79 78 78 78 79 79 79 79 RH 80 88 94 97 97 82 72 75 82 88 97100100 82 72 75 82 88 97100 WIND DIR NE E E E E E E E E E E E E E E E E E E E WIND SPD 12 11 11 8 10 13 14 14 14 12 11 10 13 16 13 13 13 11 10 10 CLOUDS B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 SC SC SC SC SC SC SC SC POP 12HR 50 40 20 20 20 QPF 12HR 0.50 0.18 0.12 0.07 0.09 RAIN SHWRS C C C C S S S S S S S S S S S S S S S S TSTMS S S S S S S S S S S S S WIND CHILL -120-120-120-120-120-120-120-120-120-120-120-120-120-120-120-120-120-120-120-120 MIN CHILL -120 -120 -120 -120 -120 -120 -120 -120 -120 -120 -120 DATE 10/18/25 SUN 10/19/25 MON 10/20/25 TUE 10/21/25 WED 10/22/25 CHST6HRLY 10 16 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6HRLY 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 MAX/MIN 88 78 88 78 88 78 88 80 86 TEMP 84 87 83 79 84 87 83 79 84 87 83 79 84 87 84 81 84 85 DEWPT 79 79 79 79 79 79 79 79 79 78 79 79 79 78 79 79 78 78 PWIND DIR E E E E E E E SE SE WIND CHAR GN GN GN GN GN GN GN GN GN AVG CLOUDS SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 POP 12HR 20 20 20 20 30 30 30 30 40 RAIN SHWRS S S S S S S S S C C C S C C C C C C TSTMS S S S S S S S S S S S S S S S $$