Monocacy River At Monocacy Blvd At Frederick flow report
As of July 13, 2026, Monocacy River At Monocacy Blvd At Frederick is flowing at 381 cfs with a gage height of 2.51 ft, receding 41% over the past 24 hours. Source: USGS gauge #01642190, refreshed throughout the day.
Historical Data
Monocacy River At Monocacy Blvd At Frederick at a glance
How Monocacy River At Monocacy Blvd At Frederick is running right now, where it sits on the map, and the key gauge stats.
Monocacy River At Monocacy Blvd At Frederick is flowing at 381 cfs, with the water sitting 2.51 ft at the gage. Flow is down 41% since yesterday as the gauge recedes.
This is USGS gauge #01642190 in Maryland. Over the past 10 days the average has been 294 cfs, peaking at 653 cfs.
Over the next 5 days, Monocacy River At Monocacy Blvd At Frederick is expected to recede from today's 653 cfs, toward roughly 420 cfs by 2026-07-17 (likely range 196-899 cfs) -- about normal for the date.
For real-time updates and historical context, see the realtime view or the historical comparison. Browse other gauges in the Maryland flow report.
Streamflow Forecast
Powered by PULSE — Snoflo’s Predictive Unified Learning & Simulation Engine, which learns from how this river has answered every past storm, snowmelt, and dry spell to forecast where it’s headed with a precision generic models can’t match.
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.
Monocacy River At Monocacy Blvd At Frederick
The river is fed by several tributaries, including Fishing Creek and Double Pipe Creek. There are no major dams on the main stem of the river, but there are several small dams on tributaries. The flow of the river varies seasonally, with higher flows typically occurring in the spring and after heavy rain events. Interestingly, the Monocacy River played a significant role in the Civil War, as it was the site of a battle in 1864. Today, the river provides important habitat for fish and wildlife in the region.
Nearby streamflow levels
Cross-check Monocacy River At Monocacy Blvd At Frederick's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| Monocacy River At Monocacy Blvd At Frederick | 381 cfs |
| Monocacy River At Jug Bridge Near Frederick | 492 cfs |
| Catoctin Creek Near Middletown | 15 cfs |
| Bennett Creek At Park Mills | 26 cfs |
| Big Pipe Creek At Bruceville | 22 cfs |
| Potomac River At Point Of Rocks | 4,030 cfs |
Nearby snowpack data
Snowpack at SNOTEL stations near Monocacy River At Monocacy Blvd At Frederick. Spring snowmelt is the dominant driver of streamflow in mountain basins -- a deep snowpack upstream means more runoff later in the season.
| SNOTEL station | Snowpack |
|---|---|
| Damascus 3 Ssw Coop | 0 in |
| Emmitsburg 2 Se Coop | 0 in |
| Montgomery Village 1.1 Ene | 0 in |
| Hagerstown 1e Coop | 0 in |
| Hagerstown 1.0 Ene | 0 in |
| Eldersburg 0.9 E | 0 in |
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 Monocacy River At Monocacy Blvd At Frederick in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when Monocacy River At Monocacy Blvd At Frederick crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About Monocacy River At Monocacy Blvd At Frederick
Where does the streamflow data for Monocacy River At Monocacy Blvd At Frederick come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 01642190. 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 Monocacy River At Monocacy Blvd At Frederick 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 Monocacy River At Monocacy Blvd At Frederick report
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