757
WWMY80 PGUM 100129
SPSGUM
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TIYAN GU
1129 AM CHST FRI APR 10 2026
GUZ001-MPZ001>003-110130-
GUAM-ROTA-TINIAN-SAIPAN-
1129 AM CHST FRI APR 10 2026
TROPICAL STORM SINLAKU (04W) CONTINUES TO ORGANIZE NORTH-NORTHWEST OF
CHUUK. THIS SYSTEM WILL CONTINUE TO MOVE VERY SLOWLY IN A WEST TO
NORTHWEST DIRECTION FOR ANOTHER 24 TO 36 HOURS, BEFORE INCREASING
FORWARD SPEED AS IT STRENGTHENS. THE CURRENT FORECASTS HAVE THE
SYSTEM STRENGTHENING INTO A TYPHOON OR STRONGER, AND APPROACHING THE
MARIANAS. THE POTENTIAL TRACK TAKES TS SINLAKU INTO THE MARIANAS,
NEAR GUAM. HOWEVER, MODELS CONTINUE TO SHOW A SLIGHT SPREAD WHERE TS
SINLAKU'S TRACK COULD SHIFT SLIGHTLY NORTH OR SOUTH, THOUGH THESE
RANGES ARE NARROWING AND WILL CONTINUE TO NARROW OVER THE NEXT 12-24
HOURS.
A BREEZY, BUT RELATIVELY DRY TRADE-WIND PATTERN IS IN PLACE OVER THE
MARIANAS, BUT AS TROPICAL STORM SINLAKU CLOSES IN, CONDITIONS WILL
DETERIORATE SOMETIME AROUND LATE SUNDAY. THE MARIANAS SHOULD MAKE
PREPARATIONS FOR THE POTENTIAL FOR TROPICAL STORM OR TYPHOON-FORCE
WINDS, WITH THE MOST LIKELY TIME OF TROPICAL STORM-FORCED WINDS
AROUND MONDAY. FOR THE FAR NORTHERN MARIANA ISLANDS, BREEZY AND
CHOPPY SEA CONDITIONS ARE EXPECTED LATE THIS WEEKEND AND INTER EARLY
NEXT WEEK, WITH POTENTIAL FOR TROPICAL STORM-FORCE WINDS AROUND
TUESDAY.
LOCALLY HEAVY RAINFALL IS LIKELY WITH TROPICAL STORM SINLAKU.
MODELS SHOW THE POTENTIAL 10 TO 15 INCHES NEAR THE CENTER OF TS
SINLAKU, BUT IF ANY OF THE ISLANDS WILL SEE THIS RAINFALL WILL
DEPEND ON EXACT TRACK OF TS SINLAKU. ENSEMBLE GUIDANCE SHOWS BROADER
POTENTIAL FOR 5-8 INCHES ACROSS GUAM, AND 3-5 INCHES FOR ROTA,
TINIAN, AND SAIPAN, BUT HIGHER RAINFALL TOTALS MAY SHIFT DEPENDING IF
THE TRACK OF TROPICAL STORM SINLAKU SHIFTS SOUTHWARD OR NORTHWARD.
OF RAINFALL TO DEVELOP FOR GUAM EARLY NEXT WEEK
SCHANK
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