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Service Description: The map depicts the inundation extent of the National Water Model (NWM) streamflow forecast for Alaska where the NWM is signaling high water. Shown are sections of river with flow at or above a predetermined high water threshold as depicted in the High Flow Magnitude - Alaska service. 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. Also depicted is the magnitude of the National Water Model (NWM) streamflow forecast where the NWM is signaling high water. This service is derived from the analysis and assimilation configuration of the NWM for Alaska. Shown are reaches with flow at or above high water thresholds. Reaches are colored by the annual exceedance probability (AEP) of their current flow. High water thresholds (regionally varied) and AEPs were derived using the 43-year NWM v3 reanalysis simulation. Updated hourly. For feedback or questions please email nwps.webmaster@noaa.gov
Map Name: NWM FIM Extent Analysis - Alaska
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Description: The map depicts the inundation extent of the National Water Model (NWM) streamflow forecast for Alaska where the NWM is signaling high water. Shown are sections of river with flow at or above a predetermined high water threshold as depicted in the High Flow Magnitude - Alaska service. 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. Also depicted is the magnitude of the National Water Model (NWM) streamflow forecast where the NWM is signaling high water. This service is derived from the analysis and assimilation configuration of the NWM for Alaska. Shown are reaches with flow at or above high water thresholds. Reaches are colored by the annual exceedance probability (AEP) of their current flow. High water thresholds (regionally varied) and AEPs were derived using the 43-year NWM v3 reanalysis simulation. Updated hourly. For feedback or questions please email nwps.webmaster@noaa.gov
Service Item Id: c4d46446e6d64583859111b7b1aa4a57
Copyright Text: National Water Model, NOAA/NWS National Water Center
Spatial Reference:
102100
(3857)
LatestVCSWkid(0)
Single Fused Map Cache: false
Initial Extent:
XMin: -1.8249902241102573E7
YMin: 7657922.42028567
XMax: -1.5368583978466045E7
YMax: 9693895.242231315
Spatial Reference: 102100
(3857)
LatestVCSWkid(0)
Full Extent:
XMin: -2.0037507842788246E7
YMin: -3.024097145838615E7
XMax: 2.0037507842788246E7
YMax: 3.024097145838615E7
Spatial Reference: 102100
(3857)
LatestVCSWkid(0)
Units: esriMeters
Supported Image Format Types: PNG32,PNG24,PNG,JPG,DIB,TIFF,EMF,PS,PDF,GIF,SVG,SVGZ,BMP
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Title: Map
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Keywords: national water model,nwm,ana,alaska,fim,inundation,extent,high flow,magnitude
AntialiasingMode: None
TextAntialiasingMode: Force
Supports Dynamic Layers: true
MaxRecordCount: 2000
MaxSelectionCount: 2000
MaxImageHeight: 4096
MaxImageWidth: 4096
Supported Query Formats: JSON, geoJSON, PBF
Supports Query Data Elements: true
Min Scale: 0
Max Scale: 0
Supports Datum Transformation: true
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