Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Gauge Information
Flood Categories (in feet)
Major Flood Stage:
24
Moderate Flood Stage:
20
Flood Stage:
17
Action Stage:
15
Historical Crests (1) 38.00 ft on 07/03/1869 (2) 38.00 ft on 09/09/1921 (3) 36.50 ft on 11/16/2001 (4) 32.00 ft on 10/17/1998 (5) 30.50 ft on 12/21/1991 Show More Historical Crests
Low Water Records
Graphical representation of flood inundation for NWS flood categories are based on steady state hydraulic modeling of water surface elevations for incremented discharges. Map shows approximate inundation areas for given water surface elevations and should not be used for navigation or permitting or other legal purposes, but strictly as a planning reference tool.
Extended rating:
Rating Curve Extension - The Rating Curve Extension is calculated by using either a linear, logarithmic, or hydraulic technique to extend the rating curve above the currently established relationship between stage and flow.
Flood Impacts
54
HEIGHT OF INSTRUMENTS INSIDE GAUGE HOUSE
49
FLOOR OF BRIDGE NEAR CENTERLINE OF CREEK
40
FLOODS SHEDS AT COUNTY MAINTENANCE FACILITY RIGHT UPSTREAM FLOODS
30
LOWEST HOMES FLOOD ON THE LOWER END OF ONION CREEK AND NEAR THE COLORADO RIVER CONFLUENCE. MANY ROADS AND LOW BRIDGES NEAR THE RIVER ARE EXTREMELY DANGEROUS TO MOTORISTS AND TRAVEL NEAR THE CREEK SHOULD BE AVOIDED. MANY BLOCKS OF A MOBILE HOME PARK ABOVE WILLIAM CANNON DRIVE ARE FLOODED WITH WATER IN LOWEST HOMES
28
MAJOR FLOODING REACHES ABOUT TEN SQUARE BLOCKS OF A MOBILE HOME PARK ABOVE WILLIAM CANNON DRIVE. MANY ROADS AND LOW BRIDGES ARE FLOODED AND VERY DANGEROUS INCLUDING WILLIAM CANNON DRIVE
26
MAJOR FLOODING THREATENS A MOBILE HOME PARK ABOVE WILLIAM CANNON DRIVE. MANY ROADS AND BRIDGES ARE FLOODED AND VERY DANGEROUS. FLOW IS WELL INTO THE FLOOD PLAIN
24
MAJOR FLOODING THREATENS TEN SQUARE BLOCKS OF A MOBILE HOME PARK JUST ABOVE WILLIAM CANNON DRIVE. RESIDENTS SHOULD PREPARE TO EVACUATE AS EMERGENCY OFFICIALS ASSESS THE THREAT. MANY ROADS AND LOW BRIDGES ARE FLOODED AND VERY DANGEROUS
22
MODERATE LOWLAND FLOODING IS WELL INTO THE FLOOD PLAIN IMPACTING LOW ROADS AND BRIDGES. RESIDENTS OF A MOBILE HOME PARK ABOVE WILLIAM CANNON DRIVE SHOULD MONITOR NOAA WEATHER RADIO FOR DEVELOPING FLOOD WARNINGS
20
MODERATE LOWLAND FLOODING REACHES SECONDARY ROADS...LOW BRIDGES AND CROSSINGS IN AUSTIN MAKING THEM VERY DANGEROUS TO MOTORISTS - RESIDENTS OF A MOBILE HOME PARK ABOVE WILLIAM CANNON DRIVE SHOULD MONITOR HEAVY RAIN AND FLOOD REPORTS AND MOVE PROPERTY TO HIGHER GROUND
19
MINOR LOWLAND FLOODING COVERS LOWEST AREAS OF THE FLOOD PLAIN WITH NO DAMAGE. LOW ROADS AND BRIDGES FLOOD
17
MINOR LOWLAND FLOODING COVERS LOW AREAS OF THE FLOOD PLAIN AND LOW STREETS AND BRIDGES.
15
FLOW EXCEEDS LOWEST SECTIONS OF THE BANKS. LOW STREET CROSSINGS AND BRIDGES ARE THREATENED
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Graphical representation of flood inundation for NWS flood categories are based on steady state hydraulic modeling of water surface elevations for incremented discharges. Map shows approximate inundation areas for given water surface elevations and should not be used for navigation or permitting or other legal purposes, but strictly as a planning reference tool.
