Tropics Outlook September 25

Hello everyone! This is a tropics outlook for the Northern Hemisphere. Here is what you need to know.

North Atlantic

• Tropical storm Philippe has not intensified as wind shear continues to disrupt the system. Since wind shear is not expected to abate for the rest of the week, a gradual decline in intensity is forecast. Philippe is also still expected to stay out to sea as it heads generally northwest.

Image 1: Visible imagery from Tropical Tidbits of Philippe. This storm is struggling against strong wind shear, with an evident mostly exposed center.

• Invest 91L has a 90% chance to become a tropical depression within the next 7 days. Conditions are expected to be slightly more favorable for intensification but shear will likely remain the primary issue.

Eastern Pacific

• A new area of interest has a 20% chance to become a tropical depression within the next 7 days in the western part of the this basin.

Western Pacific

• Tropical depression 13W was designated just east of central Vietnam and made landfall about 12 hours ago with sustained winds of 35 mph (55 km/h). Heavy rainfall remains the primary threat for those living in central Vietnam and central Laos.

• Invest 92W will not form.