Est. Annual Exceedance Probability

What is the purpose of the National Water Model Analysis and Assimilation Flood Inundation Mapping [NWM ANA FIM]?Using real-time gauge data, FIM are created to reflect what’s currently occurring. This experimental map represents the National Weather Service's best approximation of inundation extent based upon modeled river discharge. The map depicts the inundation extent of the National Water Model (NWM) streamflow forecast where the NWM is signaling high water. When does it update?HourlyWhat areas does it cover?This service is derived from the analysis and assimilation configuration of the NWM for an area that includes a limited area of the US but will be expanded later as described in this Story Map. Additional Details: https://maps.water.noaa.gov/server/rest/services/nwm/ana_inundation_extent/FeatureServer

Data and Resources

Field Value
dcat_issued 2024-05-30T19:11:50.000Z
dcat_modified 2024-05-30T20:41:57.000Z
dcat_publisher_name FEMA AGOL
guid https://www.arcgis.com/home/item.html?id=97932846d7474d458c14518c26467fa3&sublayer=2
Tags
  • 467fa3
  • Flood
  • ana
  • conus
  • extent
  • fim
  • inundation
  • model
  • national
  • nwm
  • water
isopen False
metadata_created 2025-09-19T01:28:13.149616
metadata_modified 2025-09-20T12:53:42.133400
notes <div><div><b>What is the purpose of the National Water Model Analysis and Assimilation Flood Inundation Mapping [NWM ANA FIM]?</b></div><div>Using real-time gauge data, FIM are created to reflect what’s currently occurring. </div><div><br /></div><div>This experimental map represents the National Weather Service's best approximation of inundation extent based upon modeled river discharge. The map depicts the inundation extent of the National Water Model (NWM) streamflow forecast where the NWM is signaling high water. </div><div><br /></div><div><b>When does it update?</b></div><div>Hourly</div><div><br /></div><div><b>What areas does it cover?<br /></b>This service is derived from the analysis and assimilation configuration of the NWM for an area that includes a limited area of the US but will be expanded later as described in this <a href='https://storymaps.arcgis.com/stories/c7ae8422207241b5873fff38a22cf66b' target='_blank' rel='nofollow ugc noopener noreferrer'>Story Map</a>. </div><div><br /></div><div><b>Additional Details:</b> <a href='https://maps.water.noaa.gov/server/rest/services/nwm/ana_inundation_extent/FeatureServer' target='_blank' rel='nofollow ugc noopener noreferrer'>https://maps.water.noaa.gov/server/rest/services/nwm/ana_inundation_extent/FeatureServer</a></div></div>
num_resources 6
num_tags 11
title Est. Annual Exceedance Probability
url https://prep-response-portal.napsgfoundation.org/datasets/FEMA::est-annual-exceedance-probability