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TowTide

GIWW tides, currents & locks
Alan Given · Weather
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App info

Developer
Alan Given
Category
Weather, Utilities
Released
Aug 31, 2026
Version
1.0 (Sep 1, 2026)
Price
Free
Size
8.5 MB
Requires
iOS 15.0
Age rating
4+
Languages
English

In-app purchases

Lifetime$34.99
Yearly$9.99
Monthly$2.99
Current prices, App Store US.
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About TowTide

Tide, current and lock status for the Gulf Intracoastal Waterway — Texas into Louisiana. Built for towboat crews, not beachgoers. CURRENT TAB • Favorites showing what the water is doing right now, each opening to a forecast at 0600 / 1200 / 1800 / 2359 • A map of 58 stations drawn from lat/lon — no map tiles, so it works with no signal • A searchable station list covering the GIWW from Sabine to Port Isabel • The 350: GIWW mile 350 at Bolivar Roads, where the Intracoastal crosses the Houston Ship Channel — ten channels under one card, each with its own forecast LOCKS TAB • Every lock from the Brazos floodgates to the Industrial Lock in New Orleans, collapsed to one line each • Open one for river conditions, per-gate current and head in feet and inches, VHF channel and chamber size • USACE-reported closures and stoppages — the only source that says a lock is actually shut • Mississippi…
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