Tropical Storm Surigae

Tropical Storm Surigae is packing 35-kt (40-mph) winds, moving NE at 13 kt (15 mph). Expected to stay over open water.

TROPICAL STORM 25W (SURIGAE), LOCATED APPROXIMATELY 256 NM SOUTH-SOUTHWEST OF YOKOSUKA, JAPAN, HAS TRACKED NORTHEASTWARD AT 13 KNOTS OVER THE PAST SIX HOURS. MINIMUM CENTRAL PRESSURE AT 300600Z IS 1000 MB. MAXIMU SIGNIFICANT WAVE HEIGHT AT 300600Z IS 16 FEET.— Joint Typhoon Warning Center · warning 29

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

This is the West Pacific · 30°N–40°N, 137°E–149°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.