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.
Catastrophic flooding is currently ravaging communities across the United States, with streamflow measurements showing apocalyptic water levels reaching up to 146 times normal capacity in some regions. Multiple watersheds from the Northeast to the Midwest are experiencing life-threatening conditions as heavy rainfall continues to pummel already saturated areas. Flash flood warnings remain in effect for millions of residents along the I-95 corridor and throughout the Great Lakes region, with emergency services conducting water rescues and authorities urging immediate evacuations in the hardest-hit areas.
The situation is particularly dire in the Midwest and Ohio Valley, where communities near Aurora, Indiana are facing unprecedented danger with the Middle Ohio-Laughery watershed recording flows at an astronomical 14,656% of normal levels. Nearby areas including Lawrenceburg and Rising Sun face imminent threats of catastrophic inundation. In southwestern Indiana, communities around Patoka—including Jasper and Huntingburg—are experiencing flows 14 times above normal at 11,370 cubic feet per second, overwhelming storm drains and threatening homes. Pennsylvania's Allegheny region, encompassing communities like Brookville and Clarion, is seeing flows exceeding 9,580 cfs—25 times normal—creating treacherous conditions along riverbanks. Arkansas communities near the Illinois River, including Siloam Springs and Watts, Oklahoma, face extreme danger with flows reaching 7,464 cfs, more than 51 times typical levels, while the Lower Arkansas-Maumelle area near Little Rock records flows 45 times above normal.
The crisis extends throughout the Northeast, where flash flood warnings have triggered numerous water rescues near the Jersey Shore and across Long Island. Communities along Connecticut's Saugatuck River, including Westport and Weston, are experiencing flows exceeding 2,100% of normal at 1,513 cfs, while nearby Housatonic River towns like Derby and Shelton face similar devastation with flows reaching 2,820% of normal. In New York's Lower Hudson Valley, including Ossining and Peekskill, streamflows have surged to nearly 20 times normal levels at 4,509 cfs. Illinois is particularly hard-hit, with communities near Joliet and Morris along the Lower Illinois River seeing flows of 54,200 cfs—threatening major infrastructure and residential areas—while Chicago-area communities face flows 18 times above normal. This flooding emergency comes as authorities warn that more severe weather is approaching, with Gov. Hochul declaring a flash flood threat for Long Island and emergency management agencies conducting damage assessments in Camden County, New Jersey, where vehicles have been completely submerged.
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 |
|---|---|---|---|
| Neosho River | 77,106 | 3,217 | ↑ 2397% of normal |
| Black Warrior River | 5,330 | 5,000 | 107% of normal |
| Hawlings River | 951 | 13 | ↑ 7315% of normal |
| Cowanesque River | 1,566 | 82 | ↑ 1907% of normal |
| Wapsipinicon River | 6,970 | 3,610 | ↑ 193% of normal |
| Still River | 1,360 | 49 | ↑ 2753% of normal |
| Lampasas River | 172 | 8 | ↑ 2072% of normal |
| Kickapoo River | 2,460 | 639 | ↑ 385% of normal |
| Delaware River | 1,790 | 189 | ↑ 950% of normal |
| Pootatuck River | 468 | 14 | ↑ 3319% of normal |
| Wichita River | 677 | 109 | ↑ 621% of normal |
| Tioga River | 1,540 | 72 | ↑ 2151% of normal |
| Cross River | 231 | 16 | ↑ 1435% of normal |
| Wild Rice River | 48 | 140 | 35% of normal |
| Verdigris River | 11,177 | 661 | ↑ 1690% of normal |
| Saline River | 260 | 30 | ↑ 862% of normal |
| Norwalk River | 322 | 15 | ↑ 2147% of normal |
| Croton River | 2,960 | 162 | ↑ 1827% of normal |
| Cedar River | 30 | 110 | 27% of normal |
| Tombigbee River | 16,185 | 27,685 | 58% of normal |
| Mill River | 448 | 31 | ↑ 1434% of normal |
| Lehigh River | 757 | 92 | ↑ 825% of normal |
| Titicus River | 482 | 12 | ↑ 4017% of normal |
| Blanchard River | 406 | 47 | ↑ 868% of normal |
| Muscoot River | 314 | 4 | ↑ 7104% of normal |
| Weekeepeemee River | 234 | 10 | ↑ 2438% of normal |
| Alapaha River | 180 | 24 | ↑ 763% of normal |
| Samish River | 35 | 37 | 96% of normal |
| South Skunk River | 7,930 | 523 | ↑ 1516% of normal |
| Patoka River | 11,370 | 785 | ↑ 1448% of normal |
| Salmon River | 287 | 39 | ↑ 736% of normal |
| Saugatuck River | 950 | 40 | ↑ 2405% of normal |
| Raquette River | 828 | 98 | ↑ 845% of normal |
| Illinois River | 110,980 | 56,959 | ↑ 195% of normal |
| Casselman River | 195 | 22 | ↑ 886% of normal |
| Genesee River | 3,990 | 390 | ↑ 1023% of normal |
Watersheds 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 | 1,255 | 22% |
| h07140101 | Cahokia-Joachim | 4,340 | ↑ 687% |
| h05120209 | Patoka | 11,370 | ↑ 1448% |
| h07120004 | Des Plaines | 5,135 | ↑ 1117% |
| h05090203 | Middle Ohio-Laughery | 831 | ↑ 14656% |
| h17110002 | Strait Of Georgia | 35 | 96% |
| h01100006 | Saugatuck | 1,513 | ↑ 2124% |
| h03110202 | Alapaha | 180 | ↑ 763% |
| h07130011 | Lower Illinois | 54,200 | ↑ 133% |
| h02050104 | Tioga | 3,597 | ↑ 2142% |
| h11070101 | Upper Verdigris | 177 | ↑ 651% |
| h01100005 | Housatonic | 2,062 | ↑ 2821% |
| h02080207 | Appomattox | 529 | ↑ 1542% |
| h12040104 | Buffalo-San Jacinto | 204 | ↑ 2914% |
| h01100004 | Quinnipiac | 207 | ↑ 1428% |
| h04100002 | Raisin | 260 | ↑ 862% |
| h12070203 | Lampasas | 172 | ↑ 2072% |
| h01080205 | Lower Connecticut | 287 | ↑ 736% |
| h05010005 | Clarion | 371 | ↑ 951% |
| h03160111 | Locust | 209 | ↑ 3074% |
| h05010007 | Conemaugh | 445 | ↑ 793% |
| h05010006 | Middle Allegheny-Redbank | 9,580 | ↑ 2509% |
| h04100008 | Blanchard | 406 | ↑ 868% |
| h03170001 | Chunky-Okatibbee | 1,190 | ↑ 657% |
| h10290101 | Upper Marais Des Cygnes | 1,692 | ↑ 2806% |
| h15010015 | Las Vegas Wash | 212 | ↑ 636% |
| h04110001 | Black-Rocky | 310 | ↑ 794% |
| h02040106 | Lehigh | 757 | ↑ 825% |
| h02040105 | Middle Delaware-Musconetcong | 153 | ↑ 695% |
| h05140201 | Lower Ohio-Little Pigeon | 374 | ↑ 4133% |
| h11110104 | Robert S. Kerr Reservoir | 462 | ↑ 993% |
| h05130105 | Obey | 167 | ↑ 623% |
| h02050201 | Upper West Branch Susquehanna | 8,710 | ↑ 904% |
| h02030101 | Lower Hudson | 4,509 | ↑ 1948% |
| h03080103 | Lower St. Johns | 38,274 | 30% |
| h11140302 | Lower Sulphur | 1,270 | ↑ 3273% |
| h07080105 | South Skunk | 9,700 | ↑ 1422% |
| h03160201 | Middle Tombigbee-Chickasaw | 14,930 | 68% |
| h10270103 | Delaware | 1,790 | ↑ 950% |
| h02050302 | Upper Juniata | 996 | ↑ 3758% |
| h11110207 | Lower Arkansas-Maumelle | 155 | ↑ 4506% |
| h12030108 | Richland | 466 | ↑ 5210% |
| h11130206 | Wichita | 677 | ↑ 621% |
| h02040201 | Crosswicks-Neshaminy | 626 | ↑ 1159% |
| h03050103 | Lower Catawba | 10,424 | ↑ 8816% |
| h03160113 | Lower Black Warrior | 5,330 | 107% |
| h09020201 | Devils Lake | 2,722 | ↑ 3003% |
| h05020006 | Youghiogheny | 370 | ↑ 757% |
| h03020201 | Upper Neuse | 680 | ↑ 2810% |
| h03150202 | Cahaba | 234 | ↑ 657% |
| h04150305 | Raquette | 828 | ↑ 845% |
| h07070006 | Kickapoo | 2,460 | ↑ 385% |
| h02060006 | Patuxent | 1,134 | ↑ 3658% |
| h04100011 | Sandusky | 183 | ↑ 640% |
| h11070103 | Middle Verdigris | 11,000 | ↑ 1735% |
| h04100012 | Huron-Vermilion | 155 | ↑ 5741% |
| h11110103 | Illinois | 7,464 | ↑ 5130% |
| h05120113 | Lower Wabash | 897 | ↑ 8794% |
| h08080102 | Bayou Teche | 1,920 | ↑ 2085% |
| h09020105 | Western Wild Rice | 48 | 35% |
| h11070209 | Lower Neosho | 76,600 | ↑ 2401% |
| h04100003 | St. Joseph | 453 | ↑ 1171% |
| h07090006 | Kishwaukee | 325 | ↑ 717% |
| h03040105 | Rocky, North Carolina, | 1,380 | ↑ 14375% |
| h03180002 | Middle Pearl-Strong | 435 | ↑ 7909% |
| h04130002 | Upper Genesee | 4,444 | ↑ 1079% |
| h07120007 | Lower Fox | 1,384 | ↑ 2288% |
| h07080103 | Lower Wapsipinicon | 6,970 | ↑ 193% |
| h03030002 | Haw | 158 | ↑ 1053% |
| h07120003 | Chicago | 169 | ↑ 1819% |
| h05040005 | Wills | 686 | ↑ 10402% |
| h07100008 | Lake Red Rock | 439 | ↑ 1568% |
| h04050001 | St. Joseph | 283 | ↑ 1236% |
| h04050002 | Black-Macatawa | 314 | ↑ 613% |
| h05140102 | Salt | 1,515 | ↑ 981% |
| h07120006 | Upper Fox | 392 | ↑ 1534% |
| h11070201 | Neosho Headwaters | 506 | ↑ 1888% |
| h17110012 | Lake Washington | 25 | 62% |
| h07130001 | Lower Illinois-Senachwine Lake | 50,874 | ↑ 315% |
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.
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.
- Flood alerts — get pinged the moment a river near you crosses flood stage
- Save your rivers — watch any gauge or watershed in one place
- Full history & forecasts — plus the free iPhone app