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MODULE 02 // HYDROLOGY // AUTO-GENERATED 2026-06-17

🌊 Green Flood United States: Prolonged Inundation Across South-Central Texas Watersheds

30-day flood event near Austin, Texas (May 19–June 17, 2026) driven by sustained rainfall over Edwards Plateau, impacting Colorado River discharge and downstream floodplain communities.

SOURCE USGS · NASA · NOAA
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// MODULE 02 // HYDROLOGY — AUTO-PUBLISHED June 17, 2026

A prolonged flood event struck south-central United States beginning May 19, 2026, centered near Austin, Texas (30.271°N, 97.744°W), persisting through mid-June with significant inundation risk across the Colorado River watershed and surrounding lowlands. The extended duration—nearly four weeks—indicates sustained heavy precipitation or upstream dam releases compounding riverine overflow, creating cascading flood hazards across populated areas and agricultural lands in Travis County and downstream regions.

THE SCIENCE

Flooding in the Austin region results from intense rainfall over the Edwards Plateau and upstream watersheds, where the Colorado River's narrow gorges funnel runoff toward the city. The May–June timeframe corresponds to late spring severe weather patterns when warm, moist air from the Gulf of Mexico collides with upper-level disturbances, generating repetitive thunderstorms or sustained low-pressure systems that saturate soils and overwhelm channel capacity.

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Hydrological Driver
Cumulative rainfall over Edwards Plateau and Balcones Escarpment driving Colorado River discharge above flood stage.
WATERSHED
📊
Duration & Scale
30-day flood event; prolonged inundation indicates sustained meteorological forcing or reservoir management response.
SEVERITY
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Regional Context
Austin's karst geology and rapid urban runoff amplify flood risk; Colorado River serves municipal water supply for 2+ million people.
INFRASTRUCTURE

HOW PANDITA DATA TRACKS THIS

Real-time satellite precipitation data from NOAA and USGS stream gauges on the Colorado River provide continuous flood monitoring. Pandita's 3D flood simulation integrates rainfall rates, channel geometry, and upstream discharge to visualize water extent, flow velocity, and inundation depth across the Austin metropolitan area and downstream floodplains.

FLOOD HAZARD FACTS — SOUTH-CENTRAL UNITED STATES

Flash flooding in Texas karst regions can occur within minutes; riverine flooding develops over hours to days. The Colorado River at Austin has a history of 100-year floods exceeding 40,000 cubic feet per second. Urban development in floodplains increases exposure; evacuation zones depend on real-time gauge readings and dam releases.

EMERGENCY PREPAREDNESS

1
Never Enter Floodwater
Six inches of fast-moving water can knock you off your feet; two feet can sweep away vehicles. Move to higher ground immediately and await official all-clear from Travis County Emergency Services.

Monitor live water levels and flood forecasts on Pandita Data's 3D Colorado River simulation—updated hourly with USGS gauge data—to track flood progression and plan safe evacuation routes.

FREQUENTLY ASKED QUESTIONS

What caused this flooding event?
Sustained heavy rainfall over the Edwards Plateau and upstream Colorado River watershed from May–June 2026 spring weather systems, generating cumulative runoff that exceeded channel capacity.
Which areas face the highest flood risk?
Austin, Travis County, and downstream Colorado River floodplains; karst terrain accelerates runoff; urban areas with limited drainage face rapid flash flooding risk.
What should people in affected areas do right now?
Evacuate low-lying areas and floodplain zones immediately; monitor USGS Colorado River gauges and Travis County Emergency alerts; never drive or walk through floodwater.
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