Flow Alert!

4.3
52 reviews
10K+
Downloads
Content rating
Everyone
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About this app

Flow Alert provides quick access to flow , stage, temperature, and turbidity data made available by the United States Geologic Survey (USGS) via USGS Water Services https://waterservices.usgs.gov/.

Download USGS gauges and add favorites to a separate list. Create nicknames for your favorite gauges.

Add a widget on your home screen that shows your selected parameter for your favorite gauges. Currently, widgets update automatically approximately every 15 minutes.

Add alerts to notify yourself when your gauge meets your defined criteria. Multiple alerts may be set for each favorite gauge. Manage your alerts for all gauges in one screen.

Select a gauge from the list to see an interactive graph of the past 7 days of available data.

Data provided by:
-United State Geological Survey (USGS)

Disclaimer:
Flow Alert provides quick access to flow , stage, temperature, and turbidity data made available by the United States Geologic Survey (USGS) via USGS Water Services. All data shown in Flow Alert are downloaded from the USGS Water Services API.

Flow Alert is not affiliated with, endorsed by, or representative of any government entity including USGS. Flow Alert does not take credit, responsibility, or ownership for any data downloaded from USGS's Water Services API. It is simply a tool that you can use to view the data made available by USGS.

Data Source Link https://waterservices.usgs.gov/.

If you have feedback, suggestions, or feature requests, please e-mail me at flowalertapp@gmail.com...I'd appreciate it! You may also submit feedback through the in-app feedback page.
Updated on
Dec 22, 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection

Ratings and reviews

4.3
52 reviews
Kristen Trevey
June 8, 2020
Really nice. I use it to monitor local sites for kayaking conditions. I see you're working on increasing viewable history, which will be nice, so I can compare flood to base levels. It would also be cool if we could see where flood stages are, or be able to add that to the axis ourselves. For example, major flooding on Waccamaw near Conway is stage 14'+. Moderate is 12–14' and so on. It would be cool if I could add that to my faves' y-axes. Great app, thank you!
10 people found this review helpful
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Shaina
June 9, 2020
Thank-you! I appreciate the suggestion - and I agree - having an option to turn on flood stages would be useful and I want to add that as well in a future update.
Mark Shrewsbury
April 10, 2021
Good app! As the NCOIC of a state Swift Water Rescue Team I use this app to keep track of the river gauges where we train and during flood conditions for response. I would like to see an update where the widget shows both the flow and stage at the same time. Also, it would be great to see the USGS water temperature data, where they have it, as well. Thanks and keep up the great work!
6 people found this review helpful
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Shaina
December 15, 2025
Hello - I'm glad you find the app useful! Thank you for the suggestions - the latest update has temperature data. Widget can't show multiple parameters for a gauge, but you can now set multiple alerts for a gauge. Enjoy!
A Google user
February 24, 2020
Somewhat easy to use. Would like to see flow from more than several days ago, before a particularly rainy time began. It can also be a bit convoluted to go back to the start to check other rivers, when today isn't so appealing a time to fish. But all in all, I don't even think about leaving home without checking this (and my weather app) first.
4 people found this review helpful
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Shaina
February 25, 2020
Hello! Thank-you for your feedback - I really appreciate it! I am working on making the app easier to use. I'm glad you are finding it useful in the meantime.

What’s new

-Fixes bug that was causing favorites to disappear

-Dark Mode in app and home screen widget
-Gauges now show flow, stage, temperature, and turbidity if available
-Interactive graphs you can tap and drag to view data
-Add multiple alerts per gauge
-New Gauge Manager where you can edit, delete, or pause individual alerts
-Filter gauges to quickly find the ones you want
-Submit feedback in-app