WTPQ31 PGUM 121900
TCPPQ1

BULLETIN
Super Typhoon Sinlaku (04W) Intermediate Advisory Number 15A
National Weather Service Tiyan GU WP042026
500 AM ChST Mon Apr 13 2026

...SUPER TYPHOON SINLAKU MOVING NORTH-NORTHWEST...

CHANGES WITH THIS ADVISORY
--------------------------
None.

WATCHES AND WARNINGS
--------------------
A Typhoon Warning remains in effect for Rota, Tinian, and Saipan.
Tropical Storm Warning and Typhoon Watch remains in effect for Guam.  
A Tropical Storm Warning and Typhoon Watch remains in effect for Ulul 
in Chuuk State. 
A Tropical Storm Watch remains in effect for Pagan and Alamagan.  

Residents of Agrihan should carefully monitor the progress of Super 
Typhoon Sinlaku.

SUMMARY OF 400 AM CHST...1800 UTC...INFORMATION
-----------------------------------------------
Location...11.7N 149.5E

About 215 miles north of Ulul
About 285 miles northwest of Fananu
About 335 miles north-northwest of Chuuk
About 335 miles east-southeast of Rota
About 340 miles east-southeast of Guam
About 345 miles southeast of Tinian
About 345 miles southeast of Saipan

Maximum sustained winds...175 mph
Present movement...north-northwest...335 degrees at 10 mph

DISCUSSION AND OUTLOOK
----------------------
At 400 AM CHST...1800 UTC...the center of Super Typhoon Sinlaku was 
located near Latitude 11.7 degrees North and Longitude 149.5 degrees 
East. Sinlaku is moving north-northwest at 10 mph. It is expected to 
make a slight turn toward the northwest with little change in forward
speed through Tuesday. The onset of tropical storm force winds are 
expected to reach Guam, Rota, Tinian, and Saipan this evening or 
tonight. Typhoon force winds are expected to start reaching Rota, 
Tinian, and Saipan Tuesday or Tuesday afternoon. Latest track has 
continued the slight northward shift in the storm path, with passage 
near or over Tinian and Saipan.

Maximum sustained winds remain at 175 mph. Sinlaku is forecast to 
maintain this intensity through Tuesday. Sinlaku may move into the 
Marianas as a category 4 or 5 typhoon.

Typhoon force winds extend outward from the center up to 60 miles. 
Tropical storm force winds extend outward from the center up to 275 
miles to the northeast and up to 215 miles elsewhere.

NEXT ADVISORY
-------------
The next scheduled advisory will be issued by the National Weather 
Service in Tiyan at 800 AM ChST this morning followed by an 
intermediate advisory at 1100 AM ChST late this morning.

$$

Schank