930
WGMY60 PGUM 110649
FFAGUM
FLOOD WATCH
NATIONAL WEATHER SERVICE TIYAN GU
449 PM CHST SAT APR 11 2026
GUZ001-MPZ001>003-120700-
/O.CON.PGUM.FA.A.0003.260412T0800Z-260415T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GUAM-ROTA-TINIAN-SAIPAN-
449 PM CHST SAT APR 11 2026
...FLOOD WATCH REMAINS IN EFFECT FROM SUNDAY EVENING THROUGH
WEDNESDAY MORNING...
* WHAT...FLASH FLOODING CAUSED BY EXCESSIVE RAINFALL CONTINUES TO BE
POSSIBLE.
* WHERE...GUAM, ROTA, SAIPAN AND TINIAN.
* WHEN...FROM SUNDAY EVENING THROUGH WEDNESDAY MORNING.
* IMPACTS...EXCESSIVE RUNOFF MAY RESULT IN FLOODING OF RIVERS,
CREEKS, STREAMS, AND OTHER LOW-LYING AND FLOOD-PRONE LOCATIONS.
* ADDITIONAL DETAILS...
- TYPHOON SINLAKU IS SLOWLY APPROACHING THE MARIANAS AND IS
EXPECTED TO STRENGTHEN, POSSIBLY CROSSING GUAM AS A TYPHOON
AROUND TUESDAY.
THERE IS THE POTENTIAL FOR 15 TO 20 INCHES OF RAINFALL
BETWEEN SUNDAY NIGHT AND WEDNESDAY, ESPECIALLY NEAR THE
CENTER OF TY SINLAKU. GIVEN THE CURRENT FORECAST TRACK THIS
POTENTIAL IS HIGHEST FOR GUAM AND ROTA, WITH 8 TO 15 INCHES
POSSIBLE FOR TINIAN AND SAIPAN. HOWEVER, A SHIFT IN THE
FORECAST TRACK COULD SHIFT THE AREA OF HEAVIEST RAINFALL.
WIDESPREAD SHOWERS, TORRENTIAL RAIN AND SCATTERED
THUNDERSTORMS ARE EXPECTED AS SINLAKU MOVES THROUGH THE
MARIANAS LATE MONDAY THROUGH WEDNESDAY MORNING.
AS SHOWERS ARE LIKELY TO PERSIST, CONSISTENT RAINFALL IS
LIKELY TO
PRODUCE FLASH FLOODS AND SATURATE THE SOILS ENOUGH TO
INCREASE THE
CHANCE FOR MUDSLIDES OVER CENTRAL TO SOUTHERN GUAM.
- HTTP://WWW.WEATHER.GOV/SAFETY/FLOOD
PRECAUTIONARY/PREPAREDNESS ACTIONS...
YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION
SHOULD FLASH FLOOD WARNINGS BE ISSUED.
JS
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