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Super Typhoon Trami, as seen from Japan's Himawari satellite on Sept. 24. Image: CIRA/RAMSDIS.

Super Typhoon Trami exploded in intensity from a tropical storm on Saturday to the verge of Category 5 intensity on Monday. The storm is slowly moving northwestward, spinning closer to Taiwan and southwestern Japan.

The big picture: Super Typhoon Trami is expected to reach the equivalent of Category 5 intensity as it moves slowly over some of the warmest waters in the Northern Hemisphere. By Sept. 29, it will be nearing Japan's Ryukyu Islands and northern Taiwan. Given the track uncertainty this far in advance, the storm is considered a landfall threat to Taiwan.

For now, meteorologists are eyeing it warily and with wonder given its rapid increase in intensity, massive 60-mile-wide eye, and oscillations in direction that appear to be related to its rapid-fire intensity surge. If it were to turn farther to the north and bring more impacts to Japan, it would be one in a string of damaging storms to hit that nation so far this typhoon season.

What's next: The Joint Typhoon Warning Center will continue tracking the storm, along with the Japan Meteorological Agency.

Go deeper

In photos: D.C. and U.S. states on alert for pre-inauguration violence

National Guard troops stand behind security fencing with the dome of the U.S. Capitol Building behind them, on Jan. 16. Photo: Kent Nishimura / Los Angeles Times via Getty Images

Security has been stepped up in Washington, D.C., and state capitols across the U.S. as authorities brace for potential violence this weekend.

Driving the news: Following the Jan. 6 insurrection at the U.S. Capitol by some supporters of President Trump, the FBI has said there could be armed protests in D.C. and in all 50 state capitols in the run-up to President-elect Joe Biden's inauguration Wednesday.

The new Washington

Illustration: Sarah Grillo/Axios

The Axios subject-matter experts brief you on the incoming administration's plans and team.

Rep. Lou Correa tests positive for COVID-19

Lou Correa. Photo: Tom Williams/CQ-Roll Call, Inc via Getty Images

Rep. Lou Correa (D-Calif.) announced on Saturday that he has tested positive for the coronavirus.

Why it matters: Correa is the latest Democratic lawmaker to share his positive test results after last week's deadly Capitol riot. Correa did not shelter in the designated safe zone with his congressional colleagues during the siege, per a spokesperson, instead staying outside to help Capitol Police.