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Eastern North Pacific Tropical Weather Outlook
2025-07-28 11:07:19| National Hurricane Center (East Pacific)
000ABPZ20 KNHC 280907TWOEP Special Tropical Weather OutlookNWS National Hurricane Center Miami FL210 AM PDT Mon Jul 28 2025For the eastern and central North Pacific east of 180 longitude:Special outlook issued to include a recently formed area of low pressure southeast of the Hawaiian Islands.Active Systems: The National Hurricane Center is issuing advisories on Tropical Storm Iona, located in the central Pacific basin well southeast of the Hawaiian Islands.Western East Pacific:An area of low pressure well east-southeast of the Hawaiian Islands is producing disorganized showers and thunderstorms. Gradual development of this system is possible and a tropical depression could form during the next couple of days as it moves generally westward around 10 mph.* Formation chance through 48 hours...medium...40 percent.* Formation chance through 7 days...medium...40 percent.South of Southwestern Mexico:A disturbance located several hundred miles south-southwest of the Gulf of Tehuantepec is producing a large area of disorganized showers and thunderstorms. During the next day or two, an area of low pressure is forecast to form from this area of disturbed weather, well off the coast of southwestern Mexico. Thereafter, environmental conditions appear conducive for gradual development of this system, and a tropical depression is likely to form late this week as it moves west-northwestward or northwestward at 10 to 15 mph. * Formation chance through 48 hours...low...20 percent. * Formation chance through 7 days...high...70 percent.Eastern portion of the Central Pacific:Updated: Satellite derived winds indicate that a small area of low pressure has formed around 1000 miles southeast of the Hawaiian Islands. If deep convection persists, a short lived tropical depression or tropical storm could develop later today.* Formation chance through 48 hours...medium...50 percent.* Formation chance through 7 days...medium...50 percent.&&Public advisories on Tropical Storm Iona are issued under WMO header WTPA31 PHFO and under AWIPS header HFOTCPCP1. Forecast/Advisories on Tropical Storm Iona are issued under WMO header WTPA21 PHFO and under AWIPS header HFOTCMCP1.$$Forecaster Jelsema
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