Live flood monitor

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.

Last updated July 7, 2026 · 128 sensors live
Rivers above flood
36
Watersheds elevated
79
Active flood sensors
128
USGS gauges tracked
10K+
Layers
Flow vs. normal
< 50%
~ 100%
200%
500%+
Tiles © Mapbox · Data USGS, NOAA NWS, FEMA, NRCS · Click any feature for details · Multiple layers under your click aggregate into one popup.
Today's flood briefing

What's happening right now

An AI-generated daily summary stitched from active streamgauge readings, NWS warnings, and watershed status.

July
7
2026
Flood report
# CRITICAL FLOODING EMERGENCY: Record Streamflows Devastate Communities Across Multiple States

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.
Right now

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
By basin

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%
Background

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.

Safety

Flood preparedness checklist

Floodwaters rise faster than most people expect. The basics that save lives.

1
Never drive through floodwaterSix inches can stall a car; two feet floats most vehicles. Turn around — don't drown.
2
Monitor levels near youTrack the gauges upstream of your location. Snoflo's push alerts can ping you the moment a threshold is crossed.
3
Have an evacuation planKnow two routes out and where higher ground sits. If officials issue an evacuation order, leave — don't wait.
4
Move valuables upDocuments, electronics, and sentimentals to upper floors. Disconnect electrical at the main breaker if water enters the structure.
5
Trust official sourcesNWS warnings and local emergency management are the authoritative source. Snoflo data is informational; always cross-check.
6
After the water recedesDon't return until officials clear the area. Floodwater carries sewage, fuel, and downed power. Document damage before cleanup.
Frequently asked

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.