Tropical Storm Choi-Wan

Tropical Storm Choi-Wan is packing 60-kt (70-mph) winds, moving WNW at 2 kt (2 mph). Expected to stay over open water.

TROPICAL STORM 26W (CHOI-WAN), LOCATED APPROXIMATELY 128 NM NORTH-NORTHWEST OF TINIAN, HAS TRACKED WEST-NORTHWESTWARD AT 02 KNOTS OVER THE PAST SIX HOURS. MINIMUM CENTRAL PRESSURE AT 020600Z IS 987 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 020600Z IS 25 FEET. NEXT WARNINGS AT 021500Z, 022100Z, 030300Z AND 030900Z.— Joint Typhoon Warning Center · warning 10

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

This is the West Pacific · 15°N–42°N, 143°E–156°E. Choi-Wan’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 Choi-Wan’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.