Frequently Asked Questions

LakeRadar (Know Your Lake Before You Go) is an inland water conditions intelligence platform. We bring together official National Weather Service forecasts, USGS hydrological gauges, and managing agency park data into one unified screen per lake. It is designed for anglers, recreational boaters, small-craft sailors, kayakers, paddleboarders, and swimmers planning trips to inland lakes and reservoirs across the United States.

Yes, LakeRadar is 100% free and open to everyone. There are no paid tiers, no sign-up forms, and no account creation. You do not need to share an email address or register a profile to access live conditions, forecasts, or directory searches.

General weather apps provide land-based forecasts for municipal centroids and rarely account for water surface conditions. LakeRadar integrates point-specific marine and inland water observations: real-time water temperature, surface elevation relative to full pool, wind gust factor, fetch, solunar feeding intervals, and activity-specific scoring tailored to small watercraft and angling dynamics.

Each lake activity score is a mathematical heuristic combining meteorological, hydrological, and temporal inputs:

• Fishing: Evaluates barometric pressure trend, solunar alignment, water temperature, cloud cover, and wind velocity.
• Boating & Sailing: Evaluates sustained wind speeds, gust factor, lightning risk (CAPE), precipitation intensity, and water elevation.
• Paddling (Kayaking/SUP): Prioritizes calm waters, low wind chop (<10 knots), absence of squalls, and comfortable ambient temperatures.
• Swimming: Focuses on water temperature comfort bands, ambient heat index, clear weather, and water level stability.

Full mathematical weights and formulas are published openly in our Methodology.

Confidence (from 0.00 to 1.00) reflects the freshness and sensor coverage available for that specific lake. A lake with a real-time USGS gauge reporting elevation and water temp within the hour combined with a fresh NWS forecast will display high confidence (0.85–1.00). If a lake relies on modeled estimates or if a sensor is undergoing maintenance, confidence adjusts downward to signal that recreators should exercise greater vigilance.

Official alerts always take precedence. If the National Weather Service issues a Severe Thunderstorm Warning, Tornado Watch, Flash Flood Warning, or Gale Warning covering the lake, our scoring engine applies an immediate safety cap, pulling the activity score down and placing the authoritative NWS warning banner at the very top of the page.

Weather, radar alerts, and atmospheric forecasts are ingested directly from the National Oceanic and Atmospheric Administration (NOAA) National Weather Service. Hydrological measurements (water elevation, gauge height, water temperature, and discharge) originate from the U.S. Geological Survey (USGS) National Water Information System, supplemented by managing agencies including the U.S. Army Corps of Engineers (USACE), Tennessee Valley Authority (TVA), and Bureau of Reclamation (USBR).

Thousands of natural lakes and impoundments do not have an active in-situ USGS telemetry gauge stationed on them. LakeRadar maintains a strict data gate: we display verified measurements where an official sensor exists, and display an honest “no data” state rather than inventing synthetic water depths or unverified temperatures.

Full Pool (or conservation pool) is the engineered target water-surface elevation a reservoir is managed to hold during standard recreational operations. Our “Estimated Storage” percentage models approximate storage volume using published elevation-capacity curves. For deep explanations, see our Glossary.

We expand our catalog regularly. If you would like a public lake added, visit our Request a Lake page or email us with the lake name, state, and any known USGS gauge or managing park link.

If you notice an outdated park specification or ramp status, please contact us via our contact page with a reference link to the official state DNR or agency bulletin. We verify all updates before committing them to the database.