# Coastal HTF Forecast — High tide flooding forecasts

> High tide flooding forecasts (iPhone/iPad app by Ehsan Kahrizi.)

- Source: https://appshunter.io/ios/app/coastal-htf-forecast/id6794996476 (this page in markdown: same URL + `.md`)
- Developer: [Ehsan Kahrizi](https://appshunter.io/developer/6794996479)
- Category: Weather, Navigation
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 8 MB
- Languages: American English
- Released: 2026-08-13
- Data updated: 2026-08-18
- User reviews in markdown: https://appshunter.io/ios/app/coastal-htf-forecast/id6794996476/reviews.md

## What is Coastal HTF Forecast?

Coastal HTF Forecast visualizes short-range Total Water Level (TWL) 
forecasts and High Tide Flooding (HTF) thresholds for gauge locations 
along the U.S. Atlantic, Gulf, and Pacific coastlines.

FEATURES

• Nationwide map — Browse 1,400+ high-tide-flooding threshold locations 
  and 460+ water level stations across the continental United States.

• At-a-glance status — Locations are color coded so you can immediately 
  see where forecast water levels are expected to exceed flooding 
  thresholds.

• Detailed forecasts — Tap any location to view an interactive chart of 
  forecast water level against its flooding threshold, including the 
  specific time windows when the threshold is exceeded.

• Adjustable search radius — Choose a 5 km or 10 km radius for matching 
  nearby water level stations to each flooding threshold location.

• Datum details — Water levels are presented relative to Mean Higher High 
  Water (MHHW), converted from NAVD88.

• Favorites — Save the locations you monitor most for quick access.

• Automatic updates — Forecast data refreshes several times daily.

WHO IT'S FOR

Coastal researchers, floodplain and emergency managers, mariners, and 
anyone living along the coast who wants to understand upcoming water 
level conditions.

DATA SOURCE

Forecast data is derived from the NOAA National Water Model. This app is 
an independent research tool and is not affiliated with, endorsed by, or 
sponsored by NOAA or any government agency.

Developed at the Coastal Hydrology Lab, University of Alabama.


## Version history (last 2 releases)

### 1.4.1 — 2026-08-17

Adds an in-app notice when a new version is available, so you always know when newer forecast features are ready to install.

### 1.4.0 — 2026-08-06

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-18.*