Tropical Storm Surigae

Tropical Storm Surigae is packing 50-kt (60-mph) winds, moving ENE at 10 kt (12 mph). Expected to stay over open water.

TROPICAL STORM 25W (SURIGAE), LOCATED APPROXIMATELY 447 NM SOUTHWEST OF YOKOSUKA, JAPAN, HAS TRACKED EAST-NORTHEASTWARD AT 10 KNOTS OVER THE PAST SIX HOURS. MINIMUM CENTRAL PRESSURE AT 290600Z IS 989 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 290600Z IS 22 FEET.— Joint Typhoon Warning Center · warning 25

Surigae tracks over open water — no coast is in the outlook. Along its path, our forecast reads:

This is the West Pacific · 27°N–40°N, 133°E–151°E. Surigae’s forecast track is the dotted spine — the labelled dots mark its position each day. Every cell is shaded by how many hours it spends inside Surigae’s gale-force (≥34 kt · 39 mph) wind across the whole forecast, the damaging core counted double.

Read it two ways at once. Colour is the total — the hours of gale-force wind a place piles up. A slow storm writes its danger in duration, not in any single gust, so the longer the wind sits over a place, the deeper its colour. Opacity is uniform here — this basin publishes no wind-speed-probability field, so the map claims no confidence it has not earned.

Communicators describe the typhoon as having lost strength while staying south of Japan and tracking east-northeast at a steady pace. They point to stormy conditions reaching the Izu Islands, which matches the official forecast on both the storm's location and its weakening trend. Their updates add detail on how quickly the system is moving and the local impacts expected along its path.

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