Local Rainfall Map & Gauge Data

The map below shows rainfall amounts for selected watersheds draining into TVA-managed reservoirs during the past 24-hour period.

Click a city marker to see the last 24-hours of rainfall data, or right-click anywhere on the map to retrieve the data from the nearest weather station to the location you right-clicked.

Rainfall Gauge Data

Tennessee Valley Authority — Daily Precipitation Records

Getting started

Use the controls below to query daily precipitation data from TVA rain gauges across the Valley region.

Searching for gauges

Type in the search field to filter the 240+ gauge locations by name, state, or ID. Click a result to add it to your selection. You can select multiple gauges to compare side by side.

Favorites

Click the ★ star next to any gauge in the dropdown or in your selection tags to save it as a favorite. Favorites persist between visits and appear at the top of the search results. Use "Load all" to quickly select all your favorites at once.

Viewing results

Choose a time period and click "Get data." Switch between Table, Chart, and Summary views using the tabs. Use "Export CSV" to download the data.

Query parameters

Favorites

State

Gauge location(s) — Search and select multiple

Time period

Output format

Select a state, gauge location(s), and time period, then click Get data.

Results

Rainfall and Reservoir Elevations

If the level of your reservoir seems lower than one nearby, it may be because your area has received less rain. Rainfall can be different even in places that are close together. This difference affects how much rain flows into each reservoir.

A watershed is the area of land that drains to the same place. Water always flows downhill. A drop of water falling outside the highest surrounding elevation will drain to another watershed.

Other factors affecting reservoir levels include:
Why the reservoir was built, such as flood control or navigation
This size and shape of the reservoir
The type of plants and ground cover in the area
The type of soil in the watershed
Water released from reservoirs farther upstream

About Rainfall Gauge Data

TVA receives data from

283 rain gauges on the Tennessee River system
62 rain gauges on the Cumberland River System
29 rain gauges in watersheds throughout the TVA region

Data comes from TVA, the U.S. Army Corps of Engineers and U.S. Geological Survey. TVA uses this information along with stream gauges and Doppler radar to make water management decisions. For example, TVA may store water during heavy rain to reduce flooding or release water to make room for more rain

The National Weather Service, municipalities and other government agencies use information from TVA’s rain gauges – and now you can, too.