Real-time river flooding
across America.
Live USGS streamgauge readings, FEMA flood zones, NWS flood watches and warnings, and historical context — one map, refreshed throughout the day. Built for flood researchers, emergency managers, and outdoor recreationists.
What's happening right now
An AI-generated daily summary stitched from active streamgauge readings, NWS warnings, and watershed status.
**IMMEDIATE THREAT:** Multiple states across the Midwest and Ohio Valley are facing a life-threatening flooding crisis as relentless severe storms have pushed river levels to catastrophic heights, leaving at least two dead, over one million without power, and triggering widespread evacuations. Communities from Ohio to Illinois are experiencing some of the most extreme flooding in decades, with streamflows reaching up to 27,000% of normal levels in some watersheds. Emergency officials warn that dangerous conditions will persist through the weekend as additional storm systems continue to pummel already-saturated regions.
Ohio is experiencing unprecedented devastation, with Columbus and surrounding areas facing the worst impacts. The Scioto River basin, serving Columbus and Portsmouth, has exploded to nearly 3,000% of normal flow, submerging roads and neighborhoods. The situation is even more dire along the Little Muskingum River near Marietta, where flows have reached an incomprehensible 9,111% of normal—transforming normally placid streams into raging torrents. In Newark, the Licking River watershed is at 7,832% of normal, while the Shade River near Chester has surged to 16,763% of normal capacity. Cincinnati faces critical flooding along the Little Miami River (1,412% of normal) and Great Miami River systems, where Dayton is experiencing flows at 2,376% of normal. Governor DeWine has issued urgent warnings about continued flooding threats as storms keep emergency responders overwhelmed across the state.
The crisis extends dramatically beyond Ohio's borders. In Illinois, Chicago is confronting catastrophic urban flooding with the Chicago River at an astounding 2,999% of normal flow, overwhelming drainage systems and flooding basements across the metro area. The Des Plaines River serving suburban communities has reached 1,110% of normal. Indiana faces severe flooding around Lafayette (Tippecanoe River at 1,203% of normal) and along the Whitewater River near Richmond (986% of normal), with water rescues reported in multiple counties. Pennsylvania communities along the Youghiogheny River near Confluence are experiencing 2,060% of normal flows, stranding campers and flooding roads in Somerset County. West Virginia's Gauley River near Summersville has surged to 1,194% of normal, threatening mountain communities. The National Weather Service has issued flash flood emergencies across multiple states, with forecasters warning that the slow-moving storm systems—consistent with research showing hurricanes are now dumping far more rain—will continue producing dangerous flooding conditions through the coming days.
Rivers currently flooding or rising
Live USGS streamgauge readings aggregated by river. Percent-of-normal compares current flow to the seasonal average.
| River | Observed (cfs) | Seasonal avg (cfs) | vs. Normal |
|---|---|---|---|
| Clarion River | 2,180 | 254 | ↑ 858% of normal |
| Black Warrior River | 2,390 | 3,620 | 66% of normal |
| Kanawha River | 60,600 | 5,920 | ↑ 1024% of normal |
| Shade River | 2,330 | 14 | ↑ 16763% of normal |
| Olentangy River | 1,470 | 127 | ↑ 1157% of normal |
| Delaware River | 1,790 | 189 | ↑ 950% of normal |
| Santa Cruz River | 270 | 1 | ↑ 27551% of normal |
| Wichita River | 538 | 50 | ↑ 1078% of normal |
| Little Pigeon River | 7,930 | 321 | ↑ 2470% of normal |
| Pecos River | 234 | 38 | ↑ 624% of normal |
| Hocking River | 6,550 | 142 | ↑ 4613% of normal |
| Blackwater River | 363 | 49 | ↑ 739% of normal |
| Guyandotte River | 1,810 | 112 | ↑ 1616% of normal |
| Rapid River | 283 | 29 | ↑ 963% of normal |
| Cedar River | 134 | 218 | 61% of normal |
| Thief River | 547 | 84 | ↑ 651% of normal |
| Tombigbee River | 17,930 | 17,875 | 100% of normal |
| Blue Earth River | 3,100 | 442 | ↑ 701% of normal |
| Little Calumet River | 505 | 46 | ↑ 1110% of normal |
| Little River | 866 | 142 | ↑ 610% of normal |
| Tuscarawas River | 331 | 36 | ↑ 914% of normal |
| Guadalupe River | 171 | 24 | ↑ 710% of normal |
| Muskingum River | 47,000 | 3,110 | ↑ 1511% of normal |
| Blanchard River | 561 | 43 | ↑ 1305% of normal |
| Green River | 258 | 295 | 87% of normal |
| Buckhannon River | 2,260 | 177 | ↑ 1277% of normal |
| Samish River | 20 | 30 | 67% of normal |
| Ottawa River | 737 | 9 | ↑ 8011% of normal |
| Gauley River | 3,870 | 324 | ↑ 1194% of normal |
| Virgin River | 383 | 50 | ↑ 763% of normal |
| Stillwater River | 438 | 71 | ↑ 618% of normal |
| Scioto River | 37,630 | 2,927 | ↑ 1286% of normal |
| Williams River | 846 | 70 | ↑ 1209% of normal |
| Cranberry River | 653 | 59 | ↑ 1107% of normal |
| Galien River | 259 | 29 | ↑ 890% of normal |
| Casselman River | 2,901 | 148 | ↑ 1956% of normal |
| Tippecanoe River | 6,990 | 581 | ↑ 1203% of normal |
| Middle Fork River | 1,750 | 61 | ↑ 2862% of normal |
38 rivers are running elevated right now. Create a free account to see the full list, follow your rivers, and get alerts.
Create Free AccountWatersheds running elevated
Aggregated by HUC8 watershed code. Useful for catchment-level flood-risk assessment.
| HUC8 code | Watershed | Observed (cfs) | vs. Normal |
|---|---|---|---|
| h03160106 | Middle Tombigbee-Lubbub | 4,180 | 95% |
| h04140201 | Seneca | 174 | ↑ 780% |
| h07120004 | Des Plaines | 4,422 | ↑ 1110% |
| h05080001 | Upper Great Miami | 1,359 | ↑ 907% |
| h05080002 | Lower Great Miami | 499 | ↑ 2376% |
| h05080003 | Whitewater | 412 | ↑ 986% |
| h05120203 | Eel | 358 | ↑ 1772% |
| h07120003 | Chicago | 4,642 | ↑ 2999% |
| h05100202 | Middle Fork Kentucky | 192 | ↑ 616% |
| h07120006 | Upper Fox | 155 | ↑ 1384% |
| h09020304 | Thief | 547 | ↑ 651% |
| h04100007 | Auglaize | 737 | ↑ 8011% |
| h06020001 | Middle Tennessee-Chickamauga | 522 | ↑ 1246% |
| h05040006 | Licking | 2,265 | ↑ 7832% |
| h05120106 | Tippecanoe | 6,990 | ↑ 1203% |
| h05010005 | Clarion | 2,180 | ↑ 858% |
| h11140302 | Lower Sulphur | 1,270 | ↑ 3273% |
| h05010006 | Middle Allegheny-Redbank | 1,979 | ↑ 953% |
| h04100008 | Blanchard | 1,110 | ↑ 2382% |
| h05090202 | Little Miami | 533 | ↑ 1412% |
| h04040001 | Little Calumet-Galien | 2,700 | ↑ 1120% |
| h05130101 | Upper Cumberland | 292 | ↑ 1825% |
| h18100200 | Salton Sea | 326 | ↑ 1516% |
| h09030007 | Rapid | 283 | ↑ 963% |
| h04110001 | Black-Rocky | 804 | ↑ 1414% |
| h05030201 | Little Muskingum-Middle Island | 728 | ↑ 9111% |
| h05060002 | Lower Scioto | 12,953 | ↑ 660% |
| h17110002 | Strait Of Georgia | 20 | 67% |
| h15010010 | Lower Virgin | 383 | ↑ 763% |
| h05060001 | Upper Scioto | 43,245 | ↑ 2948% |
| h05030106 | Upper Ohio-Wheeling | 765 | ↑ 1260% |
| h06010107 | Lower French Broad | 7,930 | ↑ 2470% |
| h05070101 | Upper Guyandotte | 3,680 | ↑ 2359% |
| h02050201 | Upper West Branch Susquehanna | 926 | ↑ 747% |
| h06010108 | Nolichucky | 287 | ↑ 886% |
| h05030101 | Upper Ohio | 6,714 | ↑ 3038% |
| h03080103 | Lower St. Johns | 198,796 | ↑ 139% |
| h07020012 | Lower Minnesota | 389 | ↑ 846% |
| h17110012 | Lake Washington | 19 | 78% |
| h17110013 | Duwamish | 258 | 87% |
| h03160201 | Middle Tombigbee-Chickasaw | 13,750 | 102% |
| h10270103 | Delaware | 1,790 | ↑ 950% |
| h07020009 | Blue Earth | 3,100 | ↑ 701% |
| h11130206 | Wichita | 538 | ↑ 1078% |
| h03050103 | Lower Catawba | 1,976 | ↑ 1647% |
| h03160113 | Lower Black Warrior | 2,390 | 66% |
| h03050101 | Upper Catawba | 286 | ↑ 3531% |
| h05020006 | Youghiogheny | 4,474 | ↑ 2060% |
| h05020004 | Cheat | 363 | ↑ 739% |
| h05020005 | Lower Monongahela | 290 | ↑ 699% |
| h05020001 | Tygart Valley | 4,215 | ↑ 1582% |
| h05050009 | Coal | 3,981 | ↑ 2394% |
| h05050008 | Lower Kanawha | 60,600 | ↑ 1024% |
| h17040201 | Idaho Falls | 626 | ↑ 887% |
| h12100201 | Upper Guadalupe | 171 | ↑ 710% |
| h13060011 | Upper Pecos-Black | 234 | ↑ 624% |
| h15050301 | Upper Santa Cruz | 270 | ↑ 27551% |
| h05050005 | Gauley | 5,726 | ↑ 1214% |
| h12030108 | Richland | 466 | ↑ 5210% |
| h02020005 | Schoharie | 429 | ↑ 3636% |
| h03040105 | Rocky, North Carolina, | 220 | ↑ 1833% |
| h03180002 | Middle Pearl-Strong | 435 | ↑ 7909% |
| h12040104 | Buffalo-San Jacinto | 204 | ↑ 2914% |
| h07120007 | Lower Fox | 352 | ↑ 805% |
| h05030204 | Hocking | 9,490 | ↑ 5486% |
| h05110001 | Upper Green | 2,150 | ↑ 3245% |
| h05040004 | Muskingum | 48,050 | ↑ 1540% |
| h05040005 | Wills | 159 | ↑ 2028% |
| h05030203 | Little Kanawha | 2,796 | ↑ 4715% |
| h05030202 | Upper Ohio-Shade | 2,330 | ↑ 16763% |
| h02030101 | Lower Hudson | 417 | ↑ 874% |
| h15050202 | Upper San Pedro | 1,030 | ↑ 3759% |
| h05140102 | Salt | 736 | ↑ 1863% |
| h06010201 | Watts Bar Lake | 866 | ↑ 610% |
| h05040001 | Tuscarawas | 533 | ↑ 1205% |
| h05130202 | Lower Cumberland-Sycamore | 4,860 | ↑ 607% |
| h05130203 | Stones | 869 | ↑ 953% |
| h10290101 | Upper Marais Des Cygnes | 256 | ↑ 1016% |
78 watersheds are running elevated. Create a free account to see every basin.
Create Free AccountMonitoring & response toolkit
Everything on this page links into Snoflo’s gauge-level data — drill from a national view down to the readings on a single river.
Gauge-level flow reports
Every USGS streamgauge by state — live discharge, gage height, NWS flood stages, and the complete observation history.
Browse gauges →15-day flow forecasts
PULSE probabilistic outlooks on every gauge — median, likely range, and projected stage, refreshed daily.
How PULSE works →Engineering data & reports
Flow-duration statistics, observed peak context, CSV exports, and printable conditions reports for any gauge and date range.
Snoflo for Engineering →Interactive national map
Layer gauges, warnings, watersheds, rain, and recreation across the country on one map.
Open the map →What causes river flooding
Flooding is rarely a single-cause event — multiple factors usually compound. The most common drivers across the U.S.
Heavy rainfall
Persistent rain saturates soils and overwhelms drainage networks. Tropical systems and atmospheric rivers are the worst culprits.
Rapid snowmelt
Spring melt pulses can deliver months of accumulated water in days — especially when warm rain falls on existing snowpack.
Ice jams
Breakup ice can block channels, forcing water to back up and inundate upstream banks. Common on northern rivers in early spring.
Storm surge
Coastal hurricanes push seawater inland. Surge combined with rainfall is the deadliest flood scenario in U.S. history.
Reservoir releases
Controlled dam releases can dramatically increase downstream flow. USACE and USBR publish release schedules, but conditions change fast.
Burn scars
Wildfire-stripped slopes can't absorb rainfall — even modest storms produce dangerous flash floods on burned watersheds for years afterward.
Flood preparedness checklist
Floodwaters rise faster than most people expect. The basics that save lives.
Flood map & river monitoring FAQ
What does "percent of normal" mean?
The current flow at a gauge compared to its seasonal average for this date. 100% means flow is right at the historical norm. 200%+ means twice the typical flow — a strong indicator of flood conditions on small-to-medium rivers. Every gauge-level flow report shows its live percent-of-normal.
What's the difference between a flood watch and a flood warning?
Watch: conditions are favorable for flooding within the next 12–48 hours. Warning: flooding is happening or imminent. Both come from the National Weather Service. Snoflo overlays both as toggleable layers on the map above.
How often does Snoflo's data refresh?
USGS streamgauge readings update every 15 minutes; we re-pull every hour. NWS warning polygons update as the NWS issues them — usually within 5 minutes. FEMA flood zones are static (the National Flood Hazard Layer is updated quarterly).
What is the FEMA flood zone layer?
FEMA's National Flood Hazard Layer (NFHL) shows the 1%-annual-chance ("100-year") and 0.2%-annual-chance ("500-year") floodplains. These are based on long-term hydrologic modeling, not current conditions. Useful for property risk; not a real-time signal.
Can I get an alert when my local river floods?
Yes. Save any USGS gauge as a favorite in the Snoflo iOS app, set a threshold (e.g. "alert me at 20 ft stage"), and you'll get a push the moment it crosses. Free with a Snoflo account.
Is Snoflo a substitute for official warnings?
No. Snoflo is informational. For life-safety decisions always follow guidance from local emergency management, the NWS, and law enforcement.
Track river flooding in real time
Create your free account to monitor flood conditions across America — and watch the rivers you care about.