Atascosa River Flow
As of 2026-07-29, the Atascosa River is flowing at a combined 2 cfs across 2 USGS streamgauges — 106% of normal for this time of year, versus a seasonal average of 2 cfs.
Total streamflow across the Atascosa River was last observed at 2 cfs, and is expected to yield approximately 4 acre-ft of water today; about 106% of normal. Average streamflow for this time of year is 2 cfs, with recent peaks last observed on 2023-04-08 when daily discharge volume was observed at 2,920 cfs.
Maximum discharge along the river is currently at the Atascosa Rv At Whitsett reporting a streamflow rate of 0.51 cfs. However, the streamgauge with the highest stage along the river is the Atascosa Rv Nr Mccoy with a gauge stage of 5.03 ft. This river is monitored from 2 different streamgauging stations along the Atascosa River, the highest being situated at an altitude of 265 ft, the Atascosa Rv Nr Mccoy.
River streamflow levels
Daily aggregate streamflow across every monitored gauge along the Atascosa River. Use the range buttons to zoom in on a specific period.
Total streamflow
Sum of all monitored streamgauges · daily
Every streamgauge along the Atascosa River
All 2 USGS gauges Snoflo tracks for this river, with current flow, stage, recent change, percent of normal, and the gauge's all-time min / max. Click any header to sort. Cells are heatmapped relative to the column min/max -- darker blue = higher.
| Streamgauge▾ | Streamflow (cfs)▾ | Gauge stage (ft)▾ | 24h Δ (%)▾ | % Normal▾ | Min (cfs)▾ | Max (cfs)▾ | Elevation (ft)▾ |
|---|---|---|---|---|---|---|---|
|
Atascosa Rv Nr Mccoy
TX
USGS 08207500
|
· | 5.03 | · | 0% | 0 | 6,330 | 265 |
|
Atascosa Rv At Whitsett
TX
USGS 08208000
|
1 | 1.65 | 168.4 | 43% | 0 | 13,700 | 183 |
Maximum streamflow discharge by year
The single highest aggregate discharge recorded each year. Spotting the multi-year trend reveals droughts vs. wet cycles long before the headline daily flow does.
Annual peak discharge
From the river's full record · one point per water year
Streamflow elevation profile
Each bubble is one gauge along the river, plotted by current streamflow (x-axis) vs elevation (y-axis), sized by gauge stage. Reading top-to-bottom traces the river from headwaters down to its mouth -- you can see flow accumulate as elevation drops.
Elevation vs streamflow
One point per monitored gauge · bubble size = gauge stage
Atascosa River
The Atascosa River is a river located in southern Texas that runs for approximately 135 miles through Atascosa, Bexar, Karnes, Live Oak, and McMullen counties. The river begins near the town of Poteet in Atascosa County and flows southeast into the Gulf of Mexico. Historically, the Atascosa River was a crucial water source for early Spanish explorers, and later for ranchers and farmers in the region. Today, it supports a variety of agricultural activities, including cattle ranching and irrigated farming. The river also has several reservoirs, including the Choke Canyon Reservoir and the Calaveras Lake, which provide drinking water and recreational opportunities for nearby communities. Despite ongoing conservation efforts, the Atascosa River faces challenges including pollution, overuse, and habitat loss.
Recreation along the Atascosa River
Fishing access and paddle runs Snoflo tracks within the watershed.
Track the Atascosa River in the Snoflo app
Set per-gauge push alerts (e.g. "alert me when flow at the Russian R Nr Healdsburg crosses 5,000 cfs"), and Snoflo's iOS app pushes the moment USGS reports the crossing.
About the Atascosa River
How is the Atascosa River flowing right now?
As of 2026-07-29, the Atascosa River is flowing at a combined 2 cfs across its USGS streamgauges, about 106% of normal for this date. The live per-gauge breakdown and 24-hour trend are shown above.
Is the Atascosa River running high or low right now?
Check the percent-of-normal figure on this page: above 100% means the river is running higher than its seasonal average for the date, below 100% means lower. The per-gauge table shows which reaches are highest and lowest.
Where does the data for the Atascosa River come from?
Streamflow and gauge stage data are sourced from the U.S. Geological Survey (USGS) National Water Information System. The aggregate flow shown at the top of the page is computed by Snoflo as the sum of all monitored gauges along the river.
How is "percent of normal" calculated?
Today's aggregate streamflow is compared to the historical average aggregate streamflow on this calendar day across the river's full record. 100% means right on average; values above 100% indicate above-normal flow (wet year); values below indicate below-normal (dry year or drought).
Why are some gauges showing very different flows?
Gauges along a river measure flow at different points: headwater gauges read what's coming off the snowpack or mountain runoff; downstream gauges integrate everything upstream, including tributary inputs. Wide spreads usually mean a tributary is contributing significantly between gauges.
What's the elevation profile chart showing?
Each bubble is one gauge along the river, plotted by streamflow (x-axis) and elevation (y-axis), sized by gauge stage. Reading top-down traces the river from headwaters to mouth -- you can see flow build as elevation drops.
Can I get alerts when a specific gauge crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app on a per-gauge basis. Open any individual streamgauge from the table above and favorite it to set a discharge threshold.