FPMY50 PGUM 170007 ZFPGUM Zone Forecast for Guam and the Northern Marianas National Weather Service Tiyan GU 1007 AM ChST Sat Oct 17 2026 GUZ001-170800- Guam- 1007 AM ChST Sat Oct 17 2026 ...COASTAL FLOOD WARNING NOW IN EFFECT FROM 5 PM THIS AFTERNOON TO 4 AM CHST MONDAY... ...TYPHOON WARNING IN EFFECT... ...FLOOD WATCH REMAINS IN EFFECT THROUGH SUNDAY AFTERNOON... ...COASTAL FLOOD WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 4 AM CHST MONDAY... ...HIGH SURF WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 4 AM CHST MONDAY ALONG NORTH AND EAST FACING REEFS... .TODAY...Breezy. Partly sunny. Isolated showers becoming scattered locally heavy showers and isolated thunderstorms near noon. North winds 10 to 15 mph increasing to 20 to 25 mph in the afternoon. Highs around 85. Chance of showers 50 percent. .TONIGHT...Tropical storm conditions expected. North to northeast winds 25 to 35 mph with gusts to 50 mph becoming north to northwest to 50 to 70 mph with gusts to 90 mph late evening. Mostly cloudy with numerous locally heavy showers and scattered thunderstorms. Lows around 76. Chance of showers 50 percent. .SUNDAY...Typhoon conditions expected. Varying winds through the day as TY Champi passes, at 80 to 110 mph with gusts to 160 mph, becoming southeast and decreasing to 50 to 70 mph with gusts 90 mph in the afternoon. Cloudy. Widespread locally heavy showers and scattered thunderstorms. Highs around 84. Chance of showers near 100 percent. .SUNDAY NIGHT...Tropical storm conditions expected. Southeast winds 40 to 50 mph with gusts to 70 mph, decreasing to 25 to 35 mph with gusts to 50 mph near midnight. Mostly cloudy. Scattered locally heavy showers and thunderstorms. Lows around 75. Chance of showers 50 percent. .MONDAY...Windy. Partly sunny with a 40 percent chance of showers and a slight chance of thunderstorms. Southeast winds 25 to 30 mph. Highs around 84. .MONDAY NIGHT...Breezy. Mostly cloudy with a 30 percent chance of showers. Lows in the upper 70s. .TUESDAY THROUGH FRIDAY...Partly cloudy with a 20 percent chance of showers. Highs in the mid 80s. Lows in the upper 70s. $$ MPZ001-170800- Rota- 1007 AM ChST Sat Oct 17 2026 ...FLOOD WATCH REMAINS IN EFFECT THROUGH SUNDAY AFTERNOON... ...TYPHOON WARNING IN EFFECT... ...COASTAL FLOOD WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 4 AM CHST MONDAY ALONG EAST AND SOUTH FACING REEFS... ...HIGH SURF WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 4 AM CHST MONDAY ALONG EAST AND SOUTH FACING REEFS... .TODAY...Breezy. Partly sunny. Isolated showers becoming scattered locally heavy showers and isolated thunderstorms near noon. North winds 20 to 25 mph. Gusts up to 35 mph in the afternoon. Highs around 85. Chance of showers 50 percent. .TONIGHT...Tropical storm conditions expected. Southeast winds 25 to 35 mph with gusts to 45 mph increasing to 35 to 45 mph with gusts to 70 mph late evening. Mostly cloudy with scattered locally heavy showers and thunderstorms. Lows around 78. Chance of showers 50 percent. .SUNDAY...Tropical storm conditions expected. Typhoon conditions possible. East to southeast winds 40 to 60 mph with gusts to 80 mph. Cloudy. Numerous locally heavy showers and scattered thunderstorms. Highs around 84. Chance of showers 70 percent. .SUNDAY NIGHT...Tropical storm conditions expected. Southeast winds 30 to 40 mph. Gusts up to 60 mph, decreasing to 20 to 30 mph with gusts to 50 mph near midnight. Mostly cloudy with scattered showers and thunderstorms. Lows around 77. Chance of showers 50 percent. .MONDAY...Windy. Mostly cloudy with a 40 percent chance of showers and a slight chance of thunderstorms. Southeast to south winds 30 to 40 mph. Highs around 83. .MONDAY NIGHT AND TUESDAY...Breezy. Mostly cloudy. A 30 percent chance of showers. Lows in the upper 70s. Highs in the lower80s. .TUESDAY NIGHT THROUGH FRIDAY...Partly cloudy with a 20 percent chance of showers. Lows in the upper 70s. Highs in the mid 80s. $$ MPZ002-003-170800- Tinian-Saipan- 1007 AM ChST Sat Oct 17 2026 ...FLOOD WATCH REMAINS IN EFFECT THROUGH SUNDAY AFTERNOON... ...TROPICAL STORM WARNING IN EFFECT... ...TYPHOON WATCH IN EFFECT... ...COASTAL FLOOD WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 4 AM CHST MONDAY ALONG EAST AND SOUTH FACING REEFS... ...HIGH SURF WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 4 AM CHST MONDAY ALONG ALONG EAST AND SOUTH FACING REEFS... .TODAY...Breezy. Partly sunny. Isolated showers becoming scattered locally heavy showers and isolated thunderstorms near noon. Northeast winds 15 to 25 mph. Gusts up to 30 mph. Highs around 85. Chance of showers 50 percent. .TONIGHT...Tropical storm conditions expected. East to southeast winds 20 to 30 mph with gusts to 40 mph increasing to 30 to 40 mph with gusts to 60 mph. Mostly cloudy with scattered locally heavy showers and isolated thunderstorms. Lows around 78. Chance of showers 50 percent. .SUNDAY... Tropical storm conditions expected. Southeast winds 35 to 45 mph with gusts to 70 mph, decreasing to 25 to 35 mph with gusts to 45 mph. Mostly cloudy with scattered locally heavy showers and thunderstorms. Highs around 84. Chance of showers 50 percent. .SUNDAY NIGHT...Windy. Mostly cloudy. Scattered showers and thunderstorms in the evening, then isolated showers after midnight. Southeast winds 25 to 35 mph with gusts to 45 mph decreasing to 20 to 30 mph with gusts to 40 mph near midnight. Lows around 78. Chance of showers 50 percent. .MONDAY...Breezy. Mostly cloudy with a 50 percent chance of showers and a slight chance of thunderstorms. Southeast winds 20 to 25 mph. Gusts up to 35 mph in the morning. Highs around 84. .MONDAY NIGHT AND TUESDAY...Mostly cloudy. A 30 percent chance of showers. Lows in the upper 70s. Highs in the mid 80s. .TUESDAY NIGHT THROUGH FRIDAY...Breezy. Partly cloudy with a 20 percent chance of showers. Lows around 80. Highs in the mid 80s. $$