Big Creek Near Alpharetta flow report
As of July 16, 2026, Big Creek Near Alpharetta is flowing at 61 cfs with a gage height of 2.24 ft, receding 71% over the past 24 hours. Source: USGS gauge #02335700, refreshed throughout the day.
Historical Data
Big Creek Near Alpharetta at a glance
How Big Creek Near Alpharetta is running right now, where it sits on the map, and the key gauge stats.
Big Creek Near Alpharetta is flowing at 61 cfs, with the water sitting 2.24 ft at the gage. Flow is down 71% since yesterday as the gauge recedes.
This is USGS gauge #02335700 in Georgia. Over the past 10 days the average has been 79 cfs, peaking at 214 cfs.
For real-time updates and historical context, see the realtime view or the historical comparison. Browse other gauges in the Georgia flow report.
Engineering Data
Flow-duration statistics and observed peak-flow context computed from this gauge’s complete daily record (USGS #02335700).
Percentiles are flow-duration values computed from this gauge’s observed daily record as archived by Snoflo. Return periods are Weibull plotting-position estimates from observed annual maxima, provided as general reference context only. Always verify against official USGS NWIS records. Part of Snoflo for Engineering.
Streamflow Forecast
Over the next 5 days, Big Creek Near Alpharetta is expected to recede from today's 93 cfs, toward roughly 69 cfs by 2026-07-20 (likely range 31-158 cfs) -- drier than normal for the date.
Powered by PULSE — Snoflo’s forecast engine, trained on this gauge’s full record of storms, snowmelt, and dry spells.
| Date | Expected (p50) | Likely range (p25–p75) | vs normal | Projected stage |
|---|
How does this compare to past years?
Year-over-year overlay, annual peak discharge, the full distribution of daily flows on record, and the gauge's rating curve.
Weather Forecast
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day forecast
Daily temperatures, snow, and rain projected over the next two weeks.
Big Creek Near Alpharetta
It is a tributary of the Chattahoochee River and is regulated by the Lake Lanier reservoir. During the summer months, the flow is significantly lower due to the lack of precipitation, while the winter months see higher flow levels. There are no significant dams on Big Creek, but there are small dams on some of its tributaries. Interestingly, Big Creek is home to a variety of wildlife including beavers, otters, and turtles, and supports recreational activities such as kayaking and fishing.
Nearby streamflow levels
Cross-check Big Creek Near Alpharetta's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| Big Creek Near Alpharetta | 61 cfs |
| Chattahoochee River Above Roswell | 802 cfs |
| Chattahoochee River Near Norcross | 1,870 cfs |
| Crooked Creek Near Norcross | 14 cfs |
| Dick Creek At Old Atlanta Rd | 5 cfs |
| Chattahoochee River Below Morgan Falls Dam | 1,170 cfs |
River levels & flood safety
- Read the level before you go
- A river that's runnable at one flow can be deadly at another. Check current discharge and gage height — like the values shown above — against the flood-stage thresholds, and remember levels can spike fast after rain or a dam release.
- Respect cold water
- Snowmelt rivers run cold even in summer. Sudden immersion triggers cold-water shock and saps strength within minutes. Wear a PFD, dress for the water temperature (not the air), and never wade or paddle alone.
- Watch for swiftwater hazards
- Strainers (downed trees), undercut rocks, and low-head dams are the deadliest features on moving water. High, fast, muddy water hides them. If in doubt, scout from shore and portage.
- Mind flash floods & releases
- Narrow canyons can flood from a storm miles upstream, and dam-controlled reaches can rise without warning. Know the forecast, the release schedule, and your exit before you launch.
Track Big Creek Near Alpharetta in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when Big Creek Near Alpharetta crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About Big Creek Near Alpharetta
Where does the streamflow data for Big Creek Near Alpharetta come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 02335700. Snoflo refreshes the time series throughout the day. Forecasts come from the NOAA / yr.no feed Snoflo's iOS app uses.
How often is the report updated?
USGS gauges report continuously (typically every 15 minutes). Snoflo pulls fresh values throughout the day — look for the "as of" timestamp on the streamflow hero card.
What's the difference between discharge and gage height?
Discharge (cubic feet per second, or cfs) is the volume of water flowing past the gauge each second. Gage height is how high the water sits at the gauge (feet). They're related by a rating curve specific to each gauge — higher water means more flow, but the exact ratio depends on channel shape.
How is "percent of median" calculated?
Today's discharge is compared to the historical median discharge on this calendar day across the gauge's full record. 100% = right on median; 200% = a very high year; 30% = a drought-level low.
What are flood stages, and is this river safe right now?
Flood stages are NWS-defined gage-height thresholds — Action, Minor, Moderate, Major — marking when nearby roads or floodplains start to be affected. "Safe" depends on your activity and skill: a level that's a fun paddle for an expert can be lethal for a wader. Always check the current level against the thresholds above and the safety links, and when in doubt, stay off the water.
Can I get alerts when Big Creek Near Alpharetta rises?
Yes — flow alerts are managed in the Snoflo iOS app. Favorite this gauge, set a streamflow threshold (e.g. "alert me when discharge crosses 5,000 cfs"), and you'll get a push the moment USGS reports the crossing.
Access the free Big Creek Near Alpharetta report
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