7/24/2025 8:19:00 PM until 7/25/2025 4:00:00 AM

Preparations should be made as soon as possible before conditions deteriorate and should be focused on the potential for tropical storm force winds of 39 mph or greater. Keep informed while listening for possible warnings. Secure loose outdoor objects which can be blown around. Strongly consider evacuating if you live in a metal roof or container home, and do so if ordered by local officials. Residents should keep aware of the latest trends regarding TD 12W. The latest track depicts a passage to the west of the islands with tropical storm conditions possible by midday Friday. Preparations should focus on securing loose items with anticipation for southerly tropical storm winds of up to 50 mph. .WIND INFORMATION... The latest forecast track shows Krosa moving generally northward through Friday, then turn slightly to the north-northeast over the weekend, but staying the west of the islands. This will cause southeast winds to shift to south and increase tonight and Friday, becoming increasingly gusty as more widespread showers arrive Friday. Latest forecast projections show south tropical storm winds of 35 to 40 mph arriving by Friday 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 Friday, 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 1 to 2 feet 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 persist tonight but will increase beginning around midday Friday, becoming locally heavy Saturday and Sunday as 12W passes to the west. Rainfall amounts of 8 to 12 inches are possible between Friday and Monday. Even after Krosa begins to move away Sunday and Monday, a wet monsoon pattern will prolong showers across the islands.

A SLOWLY INTENSIFYING TD KROSA WEST OF SAIPAN MOVING NORTH... ...TD KROSA COULD BECOME A TROPICAL STORM FRIDAY WEST OF ANATAHAN... .NEW INFORMATION... None. .AREAS AFFECTED... This local statement provides important information and recommended actions for people in the Commonwealth of the Northern Mariana Islands. .WATCHES/WARNINGS... A Tropical Storm Watch continues for Rota, Tinian, and Saipan. Tropical storm conditions are possible Friday for Rota, Tinian and Saipan, depending on how quickly 12W intensifies once it has passed to the northwest of the islands. All persons in the watch areas should continue preparations for low-end tropical storm conditions as indicated by your local forecast and additional details, found below, for your island. A Flood Watch remains in effect for all of Guam and the Northern Marianas. Please listen closely for any Flood Warnings that might be in effect for your area. Please check the latest public and marine forecasts for detailed information about additional hazards. .STORM INFORMATION... At 7 PM ChST...the center of Tropical Depression Krosa (12W) was located near latitude 15.5N...longitude 143.5E. This was about 165 miles north-northwest of Guam and 150 miles west of Saipan. Storm motion was north, 350 degrees, at 15 mph. Storm intensity remains at 35 mph. .SITUATION OVERVIEW... Tropical Depression Krosa has made a slight turn toward the north and is moving at 15 mph. Currently west of Saipan, it will continue to move along a northerly course to keep west of the Marianas island chain. The bulk of rainfall and strong winds remains in the eastern and southern periphery and will persist over the islands for several days, despite TD Krosa having made its closest point of approach (CPA) to Rota, Tinian and Saipan. Again, worsening conditions including strong winds, gusts, and heavy rains will be felt after CPA. Showers, occasionally heavy, and increasing south to southwest winds and strong gusts will spread over the southern CNMI islands today and onward to the far northern islands Friday and Saturday. A Tropical Storm Watch is in effect based on the potential for Krosa to intensify to a tropical storm Friday as it heads northward, staying west of the CNMI.