Tropical Trouble Brewing for US East Coast Next Week

This blog post summarizes the key points from the FOX Weather update for September 25, 2025. It translates the day’s tropical and terrestrial weather headlines into an expert, readable briefing.

I’ll break down the evolving tropical systems—Tropical Storm Humberto, Invest 94L (potential Imelda), and Hurricane Gabrielle. Their likely tracks and impacts are covered, plus notable domestic and international weather stories you should watch this week.

Table of Contents

Tropical activity in the Atlantic: what to watch now

The Atlantic basin is active with multiple systems at different stages. This activity is driven by favorable sea-surface temperatures and steering flows from upper-level ridges and troughs.

These features are interacting in ways that will determine whether threats reach land or recurvate harmlessly to sea.

Humberto: rapid intensification and expected recurvature

Tropical Storm Humberto formed northeast of the northern Leeward Islands. It is forecast to strengthen significantly as it heads northwest.

Current model consensus favors a robust intensification—potentially to a major hurricane. A turn out to sea before any direct threat to the U.S. East Coast is expected.

As Humberto gains latitude, it will encounter stronger westerly flow that is likely to impart recurvature. Rapid intensification introduces forecast uncertainty in timing and intensity.

Interests from Bermuda to New England should maintain situational awareness.

Invest 94L (potential Imelda): development and uncertainty

Near the Dominican Republic, Invest 94L is being monitored for development into a tropical depression or Tropical Storm Imelda later this week or over the weekend.

The system’s future track is closely tied to Humberto’s evolution, which could alter steering currents and the timeframe of any northward push.

Models present a range of scenarios: some bring the system toward the Florida-to-mid-Atlantic coastline next week, while others keep it well offshore.

Emergency managers and coastal communities from Florida northward should track official updates and model shifts closely.

Hurricane Gabrielle and unusual Azores threat

Farther east in the Atlantic, Hurricane Gabrielle has been classified as a Category 1 hurricane. It is moving rapidly toward the Azores, prompting an uncommon Hurricane Warning for the island chain.

Why the Azores warning is notable

Only 15 hurricanes since 1850 have passed within 50 miles of the Azores. Gabrielle’s approach is rare in the historical record.

Even as a Category 1 system, Gabrielle can produce dangerous surf, damaging winds, and heavy rainfall over rugged terrain. Local preparedness and maritime precautions are warranted.

U.S. weather impacts and other headlines

Back on the U.S. mainland, a strong cold front will sweep through the I-95 corridor from Washington to New York this Thursday. This will produce widespread rain and thunderstorms.

Severe weather parameters are in place for damaging winds and flash flooding from heavy downpours. Frequent lightning and isolated tornadoes are also possible, especially within developments ahead of the front.

Beyond the tropics and severe weather headlines, there are several lighter and science-focused stories worth noting this week:

Rare full circular rainbow captured by skydivers over the U.K., a striking reminder of the optical phenomena visible only from high altitudes.

Alaska recorded its first widespread snow of the season, a harbinger of the transition to winter in the Arctic climate.

In Florida, officials completed a dramatic alligator capture that made headlines; these wildlife interactions often spike as animals respond to seasonal and habitat changes.

NOAA and NASA launched complementary space weather missions, underscoring growing interest in solar-terrestrial interactions and their impacts on infrastructure and communications.

Here is the source article for this story: Daily Weather Update from FOX Weather: Tropical trouble could be brewing for US East Coast next week