WTPQ81 PGUM 242247 HLSPQ1 URGENT - IMMEDIATE BROADCAST REQUESTED Tropical Storm Krosa (12W) Local Statement National Weather Service Tiyan GU 847 AM ChST Fri Jul 25 2025 ...KROSA UPGRADED TO TROPICAL STORM... .NEW INFORMATION... Krosa has been upgraded to a tropical storm. The Tropical Storm Watch for Rota, Tinian, Saipan and surrounding waters has been canceled as of 8 AM. A Tropical Storm Warning is now in effect for Agrihan, Pagan, and Alamagan. .AREAS AFFECTED... This local statement provides information and recommended actions for people in the Northern Marianas. .WATCHES/WARNINGS... The Tropical Storm Watch has been cancelled for Rota, Tinian, and Saipan. A Tropical Storm Warning is now in effect for Agrihan, Pagan, and Alamagan. Please check the latest public and marine forecasts for detailed information about additional hazards. .STORM INFORMATION... At 7 AM ChST...the center of Tropical Storm Krosa (12W) was located near latitude 16.5N...longitude 143.3E. This was about 230 miles north-northwest of Guam and 185 miles west-northwest of Saipan. Storm motion was north, 350 degrees, at 6 mph. Storm intensity was 40 mph. .SITUATION OVERVIEW... Tropical Storm Krosa continues to move north. While it will pass to the west of the far northern Marianas, it will likely come near enough to bring tropical storm force winds to the populated islands, namely Agrihan, Pagan, and Alamagan. Kosra is moving away from Rota, Tinian, and Saipan, but monsoonal winds south of Krosa will keep winds elevated. .PRECAUTIONARY/PREPAREDNESS ACTIONS... Seek suitable shelter, such as a cave or other hardened structure. Have a few days worth of food and water with you, as a monsoon surge will likely continue for some time after the passage of Tropical Storm Krosa. && .NEXT UPDATE... The next local statement will be issued at 3 PM ChST, or sooner if conditions warrant. MPZ001>003-250700- /O.CAN.PGUM.TR.A.4012.000000T0000Z-000000T0000Z/ /O.NEW.PGUM.HU.S.4012.250724T2247Z-250726T2000Z/ Rota-Tinian-Saipan- 847 AM ChST Fri Jul 25 2025 ...TROPICAL STORM WATCH IS CANCELLED... Tropical Storm Krosa continues to move away from Rota, Tinian, and Saipan, ending the threat of tropical storm force winds. .WIND INFORMATION... A monsoon surge is expected to maintain windy conditions through Sunday, with southwest winds of 20 to 30 mph. A Wind Advisory has been issued for these winds. .COASTAL INUNDATION AND SURF INFORMATION... Surf along south and west facing reefs will remain at hazardous levels of 8 to 11 feet through Saturday then begin to diminish. Surf will probably remain hazardous through Sunday. A High Surf Advisory and High Risk of Rip Currents have been issued to highlight these. .OTHER STORM EFFECTS... Numerous to widespread locally heavy showers will likely continue through at least Saturday and possibly into Sunday. A Flood Watch remains in effect. These conditions will taper off Sunday and Sunday night, then largely normalize on Monday. $$ ...ALAMAGAN AND PAGAN AND AGRIHAN... ...A TROPICAL STORM WARNING IS NOW IN EFFECT... .PRECAUTIONARY/PREPAREDNESS ACTIONS... Seek a suitable hardened shelter now, either a concrete building or a cave would be ideal. Have a few days worth of food and water for each person because a monsoon surge is likely to continue for a while after Tropical Storm Krosa has passed. .WIND INFORMATION... The latest forecast track shows Krosa moving generally north- northeastward through Saturday, then turning slightly back to the north on Sunday, but staying west of the islands. This will cause southeast winds to shift to south and increase today, becoming increasingly gusty as more widespread showers arrive today. Latest forecast projections show south tropical storm winds of 35 to 40 mph possibly arriving by this afternoon and gradually shifting to southwest Saturday, before diminishing sometime Sunday. Even then, a strong southwest monsoon pattern will prolong windy conditions through Sunday night. .COASTAL INUNDATION AND SURF INFORMATION... Surf will initially rise along south facing reefs today, then spread to west facing reefs Saturday, exceeding hazardous levels of 9 ft. Surf along these windward shores could approach dangerous levels of 15 ft Saturday and Sunday and remain at hazardous levels of 10 to 14 ft into early next week due to the persistent monsoon flow. Rip currents during this time will be strong and life threatening. Stay out of the water. Minor wind and wave-driven coastal inundation of up to 1 foot will be possible along windward shores, especially around times of high tide as surf reaches peak heights Saturday and Sunday. .OTHER STORM EFFECTS... Scattered showers will increase beginning around midday, becoming locally heavy Saturday and Sunday as 12W passes to the west. Rainfall amounts of 6 to 10 inches are possible through Monday. Even after Krosa begins to move away Sunday and Monday, a wet monsoon pattern will prolong showers across the islands. $$ Stanko