RiverWatch

Near real-time NOAA river stage levels, streamflow rates, and 3-day hydrograph trends.

Stay updated on local river conditions instantly without searching complex web pages. RiverWatch brings near real-time NOAA river stage levels, discharge streamflow rates, and 3-day trend charts directly to your Chrome toolbar. Whether you are planning a kayaking trip, checking fishing conditions, or keeping an eye on rising flood waters near your home, RiverWatch gives you the critical water data you need in a single click. KEY FEATURES • Live Toolbar Icon Badge: View the current river stage height directly on your browser icon. The badge color updates automatically based on official NOAA flood severity (Normal, Action, Minor, Moderate, or Major Flood). • Interactive 3-Day Hydrograph: Hover over the high-resolution trend chart to inspect precise stage measurements and exact observation timestamps over the past 72 hours. • Stage & Streamflow Metrics: Get instant access to current gauge height (ft) and discharge streamflow rates (kcfs). • Official NOAA Flood Thresholds: Displays station-specific Action, Minor, Moderate, and Major flood stage levels at a glance. • Custom Station Selection: Monitor any 5-character NOAA/NWSLI river gauge in the United States (e.g., WLGW2, PITP1). • Dark & Light Themes: Clean visual design that seamlessly adapts to Dark Mode, Light Mode, or your System Default settings. • Lightweight & Fast: Built on Manifest V3 with smart 15-minute local caching to deliver instantaneous popup load times without slowing down your browser or draining battery. HOW TO USE 1. Click ⚙ Settings to enter your local 5-character NWSLI gauge code (e.g., WLGW2). 2. Click the RiverWatch icon anytime to check current water conditions and 3-day trends. 3. Click ↗ NOAA to open the official full webpage for your selected station.