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| 11.1 |
At 11.1 ft. extreme flooding will occur in the headwaters of the North Fork of the Virgin River in Zion National Park through the towns of Springdale and Rockville. Any slot canyon, stream or river in this watershed will experience extremely hazardous conditions. |
| 10.1 |
At 10.1 ft. extreme flooding of the slot canyons and small streams of Zion National Park will occur. These areas are extremely hazardous to any hikers in the area. |
| 9.3 |
At 9.3 ft. flooding will occur in the slot canyons and small streams of Zion National Park. Hikers in these areas may be subject to very dangerous flows. |
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Latitude: 37.209700° N,
Longitude: 112.977000° W,
Horizontal Datum:
NAD83
River Stage Reference Frame |
Gauge Height |
Flood Stage |
Uses |
| NWS stage |
0 ft |
9.3 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 |
N/A |
N/A |
Older USGS topographic maps, NGVD29 benchmarks |
| MSL |
N/A |
N/A |
Older USGS topographic maps, MSL benchmarks |
| Other |
3970 ft |
3979.3 ft |
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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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