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.