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outlooks/wpc_wssi (MapServer)

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Service Description:

The Winter Storm Severity Index (WSSI) is created by screening the National Digital Forecast Database (NDFD) for winter weather elements and combining those data with non-meteorological or static information datasets (e.g., climatology, land-use, urban areas). It creates a graphical depiction of anticipated overall impacts to society due to winter weather.

The WSSI provides a classification of the overall expected severity of winter weather using the following terminology: “none,” “limited,” “minor,” “moderate,” “major,” and “extreme.”The WSSI is updated every 2 hours at 0100 UTC, 0300 UTC, etc… and provides forecasts for 24-hour periods covering Day 1, 2, and 3, as well as a 72-hour forecast encompassing the full Day 1-3 period.

There are six subcomponents of the WSSI, with the overall impact being the maximum value of any subcomponent. The specific subcomponents are Snow Load, Snow Amount, Ice Accumulation, Blowing Snow, Flash Freeze, and Ground Blizzard. For the overall impact and subcomponents, the layers contain separate Day 1, 2, and 3 24-hour forecasts and a 72-hour forecast encompassing the full 3-day period.

Link to graphical webpage:

Link to data download:

Link to metadata

Questions/Concerns about the service, please contact the DISS GIS team.

Time Information: This service is not time enabled.

Map Name: Winter Storm Severity Index


All Layers and Tables

Dynamic Legend

Dynamic All Layers

Layers: Description: Experimental forecasts of anticipated impacts to society due to winter weather

Copyright Text: NOAA/NWS/WPC

Spatial Reference: 4326  (4326)

Single Fused Map Cache: false

Initial Extent: Full Extent: Units: esriDecimalDegrees


Document Info: Supports Dynamic Layers: true

Resampling: false

MaxRecordCount: 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

Child Resources:   Info   Dynamic Layer

Supported Operations:   Export Map   Identify   QueryLegends   QueryDomains   Find   Return Updates   Generate KML