24/07/2025
🌪️ What’s Happening: Dante and Emong Locked in a Storm Dance
As of July 23, 2025, Tropical Storm Dante and Tropical Depression Emong are exhibiting a classic Fujiwhara interaction. The two systems are about 1,100 km apart—well within the typical range (1,400 km or less) where this effect becomes significant.
PAGASA reports that the stronger Dante is influencing the weaker Emong’s trajectory, steering it southward and holding it over the Ilocos Region, slowing its exit from the Philippine Area of Responsibility (PAR).
Emong is moving at about 35 km/h southwest, while Dante, moving slower at 15 km/h, maintains dominant influence.
🔍 About the Fujiwhara Effect
Originally defined by meteorologist Sakuhei Fujiwhara, this phenomenon occurs when two cyclonic vortices are within 1,400 km, prompting them to rotate around a common center.
The stronger storm often exerts control, steering the weaker system; in rare cases where both storms are of similar intensity, they may merge into a larger cyclone.
⚠️ Impacts on the Philippines
Rainfall and flooding risk are heightened across Ilocos Norte and Northern Luzon, as Emong lingers and drops steady rain due to the slowed movement.
The interaction of both systems also enhances the southwest monsoon (habagat), bringing more widespread rains to Luzon and parts of Visayas later in the week.
Credits to Western Pacific Weather
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