Texas Rain & Stream Gage Map
Latest rain, river stage, and streamflow readings from USGS and NWS gages across Texas.
Not a flood warning system. In an emergency, call 911. For flood warnings, go to weather.gov. Read the disclaimer.
Zipped shapefile (.shp, .shx, .dbf, and .prj), GeoJSON, or KML, up to 2,000 acres. Gages are listed by distance from the boundary’s center. Your file is read in your browser; HERO E&C does not receive or store it.
Click the map to add corners. Click the first corner or press Finish boundary to close. Backspace removes the last corner; Esc cancels.
Loading the latest readings…
Click a gage on the map to open it, or click anywhere else to list the gages nearby. Click the map, then scroll to zoom, or hold Ctrl and scroll; click outside the map to scroll the page. On a phone, use two fingers.
Latest readings across Texas
Loading the latest readings from USGS and NWS…
How to read the readings
- Gage height (stage)
- The water level at the gage in feet above the gage’s own zero, not an elevation. To compare it with ground or flood elevations you need the gage datum, which the USGS page for each gage gives (for example, “391.96 ft NAVD88”).
- Streamflow (discharge)
- The volume of water passing the gage, in cubic feet per second (ft³/s). USGS computes it from the gage height and a rating curve that is checked by field measurements; high and low flows are the least certain.
- NWS flood categories
- At gages where the National Weather Service sets flood stages, it reports whether the river is below action stage, at action stage, or in minor, moderate, or major flooding. The map colors only gages at action stage or above. Categories describe conditions at the gage; flooding can happen away from any gage.
- Provisional data
- Recent readings are provisional: the agencies have not reviewed them yet and can revise them. Equipment problems, ice, debris, or backwater can make a reading wrong. Each reading shows its own time.
- Rain gages and rain totals
- USGS rain gages report the rain that fell in each short interval (usually 5 or 15 minutes). For a rain gage, the tool adds those increments over 1, 3, 6, 24, and 72 hours and says how many intervals were reported; missing intervals are not filled. The rain total map is an NWS estimate from radar and rain gages for cells about 4 km across, so it is not the same as a gage reading.
- CoCoRaHS reports
- Volunteer observers read a standard rain gage once a day, usually around 7 a.m., and report the 24-hour total. “Trace” means less than 0.01 in.
- Downloads
- “Download latest readings” saves every reading on the map as a CSV file. A gage’s “Download CSV” saves its readings for the period shown (up to 30 days). Each file lists the exact agency request it came from; for longer records, use the USGS download.
Texas gage networks
Many river authorities, counties, and cities run their own rain and stream gages. This map shows readings from USGS and NWS (which carries many local gages) and the locations of some local networks; the rest are listed here with links to their own maps and data.
Federal
| Network | Covers | Data | On this map | Open |
|---|---|---|---|---|
| USGS Water Data for the NationU.S. Geological Survey | Statewide | streamflow, stage, rain | Readings on this map | Map · Data |
| National Water Prediction ServiceNOAA National Weather Service | Statewide | stage, streamflow | Readings on this map | Map |
| USGS National Water DashboardU.S. Geological Survey | Nationwide | streamflow, stage, rain | At the source | Map |
State
| Network | Covers | Data | On this map | Open |
|---|---|---|---|---|
| TexMesonetTexas Water Development Board | Statewide weather stations | rain | Locations on this map | Map · Data |
| TexasFlood.org flood viewerTexas Water Development Board (TxGIO) | Statewide | stage, lake levels | At the source | Map |
| Water Data for Texas — reservoirsTexas Water Development Board | Statewide reservoirs | lake levels | At the source | Map · Data |
River authorities and regional
| Network | Covers | Data | On this map | Open |
|---|---|---|---|---|
| LCRA HydrometLower Colorado River Authority | Lower Colorado River basin, including City of Austin gages | rain, stage, streamflow, lake levels | At the source | Map · Data |
| UGRA RiverHubUpper Guadalupe River Authority | Upper Guadalupe River, Kerr County | rain, stage, streamflow | At the source | Map |
| GBRA river conditions mapGuadalupe-Blanco River Authority | Guadalupe and San Marcos River basins | streamflow, stage, lake levels | At the source | Map |
| BRA river and reservoir informationBrazos River Authority | Brazos River basin | streamflow, stage, rain, lake levels | At the source | Map |
| SJRA flood early warning gagesSan Jacinto River Authority | Lake Conroe and Lake Creek | rain, stage, lake levels | At the source | Map |
| TRA lake and river dataTrinity River Authority | Lake Livingston and the lower Trinity River | lake levels, stage, rain | At the source | Map |
| TRWD flood and rain gagesTarrant Regional Water District | Tarrant County and TRWD reservoirs | rain, stage, lake levels | At the source | Map |
| SE Texas R.A.I.N.Lower Neches Valley Authority and partners | Southeast Texas | rain, stage, streamflow | At the source | Map |
| Edwards Aquifer Authority rain gagesEdwards Aquifer Authority | Edwards Aquifer region | rain | At the source | Map |
County
| Network | Covers | Data | On this map | Open |
|---|---|---|---|---|
| Harris County Flood Warning SystemHarris County Flood Control District and 9 partner agencies | Harris County and neighboring partners | rain, stage | Locations on this map | Map |
| Fort Bend County river levels, rainfall and releasesFort Bend County Drainage District | Fort Bend County | rain, stage | At the source | Map |
| BexarFlood.orgBexar County and San Antonio River Authority | Bexar County | stage, rain | At the source | Map |
City
| Network | Covers | Data | On this map | Open |
|---|---|---|---|---|
| ATXfloodsCity of Austin and partner cities and counties | Austin area low-water crossings; Austin creek gages appear on LCRA Hydromet | low-water crossings | At the source | Map |
| Fort Worth high water warning systemCity of Fort Worth | Fort Worth low-water crossings and rain gages | rain, low-water crossings | At the source | Map |
Volunteer and university
| Network | Covers | Data | On this map | Open |
|---|---|---|---|---|
| CoCoRaHS daily rain reportsCommunity Collaborative Rain, Hail & Snow Network | Statewide volunteer observers | rain | Readings on this map | Map · Data |
| West Texas MesonetTexas Tech University | West Texas and South Plains | rain | At the source | Map |
Listed networks checked 2026-10-24. Each agency’s own terms and disclaimers apply to its data.
Known gaps
- Readings can be minutes to hours old, and some gages report only every few hours. Each reading shows its time; gages without a reading in the last 7 days are left off the map.
- Most gages measure a river or creek at one spot. Small streams, street flooding, and ponding are not measured.
- Many county and city gages, and most river authority gages, are not on this map unless NWS carries them; use the links in Texas gage networks.
- NWS flood stages exist only at gages NWS chooses to rate. The NWS stage and the USGS gage height at the same gage can use different datums; the tool draws NWS flood stages on a chart only when the two readings agree.
- Gages on border rivers on the Oklahoma, Louisiana, and New Mexico side are not included.
- Times are shown in Central time; El Paso and Hudspeth counties use Mountain time.
- The rain total map is an estimate. Radar can miss or overstate rain, especially far from a radar and in the mountains of West Texas.
- When a service does not respond, the tool says so and does not show its readings; it does not mean there are none.
- KMZ files are not supported yet; save the boundary as KML or GeoJSON.
- Opportunity pins mark the city or county named in the notice, not the project site; listings without a city or county have no pin.
Disclaimer
Not a flood warning system. In an emergency, call 911. For flood watches and warnings, follow the National Weather Service at weather.gov and your local emergency management office. Never drive into flooded roads.
This tool displays readings that USGS, the National Weather Service, CoCoRaHS volunteers, and other public agencies publish, requested by your browser from each agency at the time shown. HERO E&C does not collect, check, or change the readings. They are provisional, can be late, missing, or wrong, and can be revised. Do not use them for design, construction, bidding, permitting, or safety decisions without checking the agency’s own records.
Using this tool does not create an engineer–client relationship. While the page is open and visible, your browser asks USGS and NWS for new readings about every 15 minutes (you can turn this off). Only the address you enter goes to the Census address search, and only the point you search goes to USGS (gages along the stream), NOAA (rain totals), and the Census Bureau (its county). HERO E&C does not receive or store your searches or files. HERO E&C · TBPELS Firm F-27793.
Data sources
| Data | Source | Currency |
|---|---|---|
| Stream discharge, gage height, rain at USGS gages | USGS Water Data for the Nation (Water Data API, public domain) | Queried live; most gages report every 5–15 minutes and send data hourly or faster |
| River stages and flood categories at NWS gages | NOAA NWS National Water Prediction Service (public domain), including gages run by local agencies | Queried live; NWS updates its map service every 30 minutes |
| Rain total map | NOAA NWS River Forecast Center multisensor precipitation estimates (radar and rain gages, public domain) | Hourly totals usually 1–3 hours behind; daily totals end at 7 a.m. CDT (6 a.m. CST) |
| Daily rain reports | CoCoRaHS volunteer network (CC BY 4.0) | Queried live; reports for today’s morning reading |
| Other gage locations | Harris County Flood Control District regional flood warning gages (queried live); TWDB TexMesonet stations (copied monthly) | Locations only; readings at the source |
| Station names, drainage areas, gage links | USGS Water Data API and NWS (copied monthly) | Refreshed monthly |
| Gages upstream and downstream | USGS Network-Linked Data Index (NHDPlus) | Queried when you ask |
| Basemaps, streams | USGS The National Map (public domain) | As served by USGS |
| Address search, counties | U.S. Census Bureau Geocoder and TIGERweb | Current |
| Teaming opportunities | HERO E&C Teaming & Opportunities (/teaming/) and Construction Teaming (/construction/) listings | Updated with each listing review; pins at the city or county named in the notice |
Map software: ArcGIS Maps SDK for JavaScript. Powered by Esri. Check any reading on the agency’s page for that gage.
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