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outlooks/spc_mesoscale_discussion (MapServer)

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View Footprint In:   ArcGIS Online Map Viewer

Service Description:

The Storm Prediction Center (SPC) Mesoscale Discussions (MDs or MCDS) Web Service consist of polygon layers that displays SPC issued Mesoscale Discussions (MDs or MCDs) that focus on severe thunderstorm potential over the continental U.S. for the next 6 hours with an emphasis on the first 1-3 hours. SPC also issues MDs for mesoscale aspects of hazardous winter weather events including heavy snow, blizzards, and freezing rain. All MDs contain an area, affected line, concerning line, valid time, a paragraph for a summary, and a paragraph for a technical discussion, along with a graphical depiction of the highlighted area.

Update Frequency: Within 15 minutes a MD or MCD is issued

Link to graphical web page:

Link to data download (shapefile):

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

Time Information:

This service is not time enabled

Map Name: SPC Mesoscale Discussion


All Layers and Tables

Dynamic Legend

Dynamic All Layers

Layers: Description:

Copyright Text: National Oceanic and Atmospheric Administration, NOAA, National Weather Service, NWS, Storm Prediction Center, SPC

Spatial Reference: 4326  (4326)  VCSWkid(5773)  LatestVCSWkid(5773)

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