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| 29.0 |
MAJOR FLOODING COVERS THE FLOOD PLAIN INSIDE THE LEVEES - FLOW APPROACHES LOWEST HOMES UPSTREAM IN BROWNSVILLE - LOW ROADS AND BRIDGES NEAR THE RIVER ARE FLOODED AND DANGEROUS - FLOOD PRONE RESIDENTS SHOULD MONITOR NOAA WEATHER RADIO FOR DEVELOPING HEAVY RAIN AND FLOODING |
| 27.0 |
MODERATE LOWLAND FLOODING COVERS MUCH OF THE FLOOD PLAIN INSIDE THE LEVEES - LOWEST SECONDARY ROADS AND LOW BRIDGES ARE FLOODED NEAR THE RIVER - PROPERTY INCLUDING IRRIGATION PUMPS, FARM EQUIPMENT, AND LIVESTOCK SHOULD BE MOVED OUT OF THE FLOOD PLAIN. LOWEST HOMES ARE THREATENED. |
| 26.0 |
FLOW IS INTO LOWEST AREAS OF THE FLOOD PLAIN INSIDE OF THE LEVEES- NO SIGNIFICANT DAMAGE OCCURS AT THIS LEVEL BUT FLOOD PRONE RESIDENTS OR PROPERTY OWNERS SHOULD MONITOR NOAA WEATHER RADIO FOR DEVELOPING HEAVY RAIN AND FLOODING |
| 24.0 |
FLOW EXCEEDS LOWEST SECTIONS OF THE BANKS INSIDE THE LEVEES |
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Latitude: 25.876300° N,
Longitude: 97.455500° W,
Horizontal Datum:
NAD83
River Stage
Reference Frame |
Gauge Height |
Flood Stage |
Uses |
| NWS stage |
0 ft |
27 ft |
Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps |
| Vertical Datum |
Elevation
(gauge height = 0) |
Elevation
(gauge height = flood stage) |
Elevation information source |
| NAVD88 |
N/A |
N/A |
Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps |
| NGVD 29 |
0 ft |
27 ft |
Older USGS topographic maps, NGVD29 benchmarks |
| MSL |
N/A |
N/A |
Older USGS topographic maps, MSL benchmarks |
| Other |
N/A |
N/A |
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Hydrologic Resources
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Additional Resources
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The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here. |
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NWS Information |
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weather.gov 
