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Service Description:
Map Name: NWM Short-Range High Water Probability Forecast
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Description: Depicts the probability of forecast high water over the next 12 hours using a time-lagged ensemble from the short-range forecast of the National Water Model (NWM) over the contiguous U.S. Shown are reaches that are forecast to have flow at or above high water within the next 12 hours of at least one of the last 7 forecasts. Reaches are colored by the probability that they will meet or exceed the high water threshold across the last 7 forecasts. Probabilities are derived by counting the number of forecasts that meet the high water condition within the next 12 hours, equally weighted. Also shown are USGS HUC8 polygons for basins with greater than 50% of NWM features with flow expected to be at or above high water over the next 12 hours, symbolized by the average probability. High water thresholds (regionally varied) were derived using the 40-year NWM v3.0 reanalysis simulation.
Updated hourly.
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
Service Item Id: 673cf11b26f84f4f9d4782a9b3ee14b3
Copyright Text: National Water Model, NOAA/NWS National Water Center
Spatial Reference:
102100
(3857)
LatestVCSWkid(0)
Single Fused Map Cache: false
Initial Extent:
XMin: -1.3433032896733047E7
YMin: 2635192.7794304653
XMax: -7937954.500973536
YMax: 6503970.399974385
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
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: short,range,forecast,high,water,national,water,model,nwm,probability
AntialiasingMode: None
TextAntialiasingMode: Force
Supports Dynamic Layers: true
Resampling: false
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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