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ArcGIS Online Map Viewer
Service Description: *****THIS IS AN EXPERIMENTAL SERVICE*****
This experimental map represents the National Weather Service's best approximation of inundation extent based upon modeled river discharge.
The map depicts the maximum inundation extent over the next 5 days derived from the official River Forecast Center (RFC) forecast routed downstream through the National Water Model (NWM) stream network. Forecast inundation extents are available for an area that includes 30% of the U.S. population but will be expanded later as described in the Story Map below.
https://storymaps.arcgis.com/stories/c7ae8422207241b5873fff38a22cf66b
Boundary of 30% Area: https://maps.water.noaa.gov/server/rest/services/reference/static_public_fim_domain/MapServer RFC-Based 5-Day Max Streamflow Forecast depicts the maximum forecast streamflow over the next 5 days derived from the official RFC forecast routed downstream through the NWM stream network. Maximum streamflows are available downstream of RFC forecast points whose forecast reaches action status or greater. Updated Hourly.
Also shown is the RFC Max Value Forecast which depicts Advanced Hydrologic Prediction Service (AHPS) RFC forecast points with forecasts at or above action stage. Circles represent forecast points where stages are changing by less than +/- 5% over the entire forecast period. Upward-pointing triangles represent forecast points where a greater than 5% increase in stage is expected sometime during the forecast. If stage increases greater than 5% are not expected, downward-pointing triangles represent forecast points where a greater than 5% decrease in stage is expected sometime during the forecast. Forecast points are colored by their maximum forecast flood category. Updated every 5 minutes.
High water thresholds (regionally varied) and Annual Exceedance Probabilities (AEPs) are derived using the 40-year NWM reanalysis simulation which is available via the NOAA Open Data Dissemination Program (NODD). Forecast inundation extents do not fully capture coastal processes. The service below depicts the boundary of this coastal area.
https://maps.water.noaa.gov/server/rest/services/reference/static_nwm_coastal_domain_noaa/MapServer
Updated every 15 minutes based on RFC Forecast availability
Link to graphical web page: https://www.weather.gov/owp/operations
Link to documentation: https://www.weather.gov/media/owp/operations/Public_Handbook_V2.3_%20NWC_Visualization_Services.pdf
For feedback or questions please email nwps.webmaster@noaa.gov
For more information on the expansion of National Weather Service (NWS) flood inundation mapping capabilities, please visit https://www.weather.gov/owp/operations. For information about the NWM, please visit https://water.noaa.gov.
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Description: *****THIS IS AN EXPERIMENTAL SERVICE*****
This experimental map represents the National Weather Service's best approximation of inundation extent based upon modeled river discharge.
The map depicts the maximum inundation extent over the next 5 days derived from the official River Forecast Center (RFC) forecast routed downstream through the National Water Model (NWM) stream network. Forecast inundation extents are available for an area that includes 30% of the U.S. population but will be expanded later as described in the Story Map below.
https://storymaps.arcgis.com/stories/c7ae8422207241b5873fff38a22cf66b
Boundary of 30% Area: https://maps.water.noaa.gov/server/rest/services/reference/static_public_fim_domain/MapServer RFC-Based 5-Day Max Streamflow Forecast depicts the maximum forecast streamflow over the next 5 days derived from the official RFC forecast routed downstream through the NWM stream network. Maximum streamflows are available downstream of RFC forecast points whose forecast reaches action status or greater. Updated Hourly.
Also shown is the RFC Max Value Forecast which depicts Advanced Hydrologic Prediction Service (AHPS) RFC forecast points with forecasts at or above action stage. Circles represent forecast points where stages are changing by less than +/- 5% over the entire forecast period. Upward-pointing triangles represent forecast points where a greater than 5% increase in stage is expected sometime during the forecast. If stage increases greater than 5% are not expected, downward-pointing triangles represent forecast points where a greater than 5% decrease in stage is expected sometime during the forecast. Forecast points are colored by their maximum forecast flood category. Updated every 5 minutes.
High water thresholds (regionally varied) and Annual Exceedance Probabilities (AEPs) are derived using the 40-year NWM reanalysis simulation which is available via the NOAA Open Data Dissemination Program (NODD). Forecast inundation extents do not fully capture coastal processes. The service below depicts the boundary of this coastal area.
https://maps.water.noaa.gov/server/rest/services/reference/static_nwm_coastal_domain_noaa/MapServer
Updated every 15 minutes based on RFC Forecast availability
Link to graphical web page: https://www.weather.gov/owp/operations
Link to documentation: https://www.weather.gov/media/owp/operations/Public_Handbook_V2.3_%20NWC_Visualization_Services.pdf
For feedback or questions please email nwps.webmaster@noaa.gov
For more information on the expansion of National Weather Service (NWS) flood inundation mapping capabilities, please visit https://www.weather.gov/owp/operations. For information about the NWM, please visit https://water.noaa.gov.
Service Item Id: d6b47da203d9477e83143d042d22003e
Copyright Text: National Water Model, NOAA/NWS National Water Center
Spatial Reference:
102100
(3857)
LatestVCSWkid(0)
Initial Extent:
XMin: -1.679165121461737E7
YMin: 1474107.3897974826
XMax: -4310232.918508362
YMax: 8534243.619137926
Spatial Reference: 102100
(3857)
LatestVCSWkid(0)
Full Extent:
XMin: -1.5224159214216806E7
YMin: 2159597.880736096
XMax: -6228307.888008264
YMax: 7211496.010788572
Spatial Reference: 102100
(3857)
LatestVCSWkid(0)
Units: esriMeters
Document Info:
Title: Map
Author:
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Subject:
Category:
Keywords: national water model,nwm,rfc,conus,fim,inundation,extent
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TextAntialiasingMode: null
Enable Z Defaults: false
Supports ApplyEdits With Global Ids: false
Support True Curves : true
Only Allow TrueCurve Updates By TrueCurveClients : true
Supports Return Service Edits Option : false
Supports Dynamic Layers: false
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