A developing tropical disturbance, Invest 99W, is quickly approaching the islands of the northern CNMI. The Joint Typhoon Warning Center (JTWC) has issued a Tropical Cyclone Formation Alert (TCFA) for 99W. This means that development into a significant tropical cyclone is likely within the next 24 hours. What this means for the northern CNMI of Alamagan, Pagan and Agrihan is that you can expect an increase in showers and thunderstorms with strong gusty winds as 99W moves past. Invest 99W is currently not expected to move through the northern CNMI stronger than a Tropical Depression. However, as with all tropical cyclones, this could change. Invest 99W is currently moving fairly quickly, which is a good thing for the northern CNMI. At the current speed, 99W looks to pass through the region near Alamagan Saturday morning or early afternoon, not becoming a Tropical Storm until later in the day, west of the islands. Invest 99W will be monitored over the next 24 hours for any significant changes in expectations and the residents of the northern CNMI should continue to monitor forecasts for any changes to the current expectations. For now, prepare for increasing rainfall, with isolated thunderstorms and strong gusty winds within the heavier showers. Only 1 to 2 inches of rainfall is expected, with gusts up to 40 mph possible. For more information on Invest 99W, see bulletins issued by JTWC under WMO header ABPW10 PGTW and WTPN21 PGTW.
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WHAT: Large breaking waves of 7 to 9 feet and dangerous rip currents.
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WHERE: For the High Surf Advisory, north facing reefs of the Marianas. For the High Rip Current Risk, north and east facing reefs.
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WHEN: Until 4 PM ChST this afternoon.
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IMPACTS: Dangerous swimming and surfing conditions and localized beach erosion. Rip currents can sweep even the best swimmers away from shore into deeper water.
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ADDITIONAL DETAILS: Elevated northeast trade swell, a smaller long-period north swell, and a north to northwest swell from Tropical Depression 31W continues to generate hazardous surf along north facing reefs and a high risk of rip currents along north and east facing reefs of the Marianas through this afternoon.
* WHAT...Large breaking waves of 7 to 9 feet and dangerous rip currents. * WHERE...For the High Surf Advisory, north facing reefs of the Marianas. For the High Rip Current Risk, north and east facing reefs. * WHEN...Until 4 PM ChST this afternoon. * IMPACTS...Dangerous swimming and surfing conditions and localized beach erosion. Rip currents can sweep even the best swimmers away from shore into deeper water. * ADDITIONAL DETAILS...Elevated northeast trade swell, a smaller long-period north swell, and a north to northwest swell from Tropical Depression 31W continues to generate hazardous surf along north facing reefs and a high risk of rip currents along north and east facing reefs of the Marianas through this afternoon.
Rip currents will be life threatening. Inexperienced swimmers should remain out of the water due to dangerous surf conditions. Rip currents will be life threatening. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help.
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WHAT: Large breaking waves of 7 to 9 feet and dangerous rip currents.
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WHERE: For the High Surf Advisory, north facing reefs of the Marianas. For the High Rip Current Risk, north and east facing reefs.
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WHEN: Until 4 PM ChST this afternoon.
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IMPACTS: Dangerous swimming and surfing conditions and localized beach erosion. Rip currents can sweep even the best swimmers away from shore into deeper water.
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ADDITIONAL DETAILS: Elevated northeast trade swell, a smaller long-period north swell, and a north to northwest swell from Tropical Depression 31W continues to generate hazardous surf along north facing reefs and a high risk of rip currents along north and east facing reefs of the Marianas through this afternoon.
* WHAT...Large breaking waves of 7 to 9 feet and dangerous rip currents. * WHERE...For the High Surf Advisory, north facing reefs of the Marianas. For the High Rip Current Risk, north and east facing reefs. * WHEN...Until 4 PM ChST this afternoon. * IMPACTS...Dangerous swimming and surfing conditions and localized beach erosion. Rip currents can sweep even the best swimmers away from shore into deeper water. * ADDITIONAL DETAILS...Elevated northeast trade swell, a smaller long-period north swell, and a north to northwest swell from Tropical Depression 31W continues to generate hazardous surf along north facing reefs and a high risk of rip currents along north and east facing reefs of the Marianas through this afternoon.
Rip currents will be life threatening. Inexperienced swimmers should remain out of the water due to dangerous surf conditions. Rip currents will be life threatening. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help.
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