Severe Center
Live SPC mesoscale discussions, watches, and storm-based warnings — with a room for real-time discussion.
Active watches
0
SPC outline + NWS counties (deduped)
Active MCDs
0
Mesoscale discussions
TOR / SV warnings
0
Storm-based polygons (polygon-valid now)
NWS watch headlines
0
api.weather.gov active
Live map
Mesoscale discussions (cyan), watches (amber / orange), tornado & severe t-storm warnings (red) · click a polygon for details
No ongoing SPC watches or recent mesoscale discussions in the current window.
SBW and headlines still appear when convection is warning-level elsewhere.
SPC mesoscale discussions
Iowa Environmental Mesonet API v1 · expired discussions are hidden
- No active mesoscale discussions right now.
Active watches
SPC outlines (valid=now) plus NWS convective watch polygons · duplicate county lists from multiple offices collapsed
- No active watch outlines or county polygons at this time.
Tornado & severe thunderstorm warnings (TOR · SV)
IEM /api/1/vtec/sbw_interval.geojson · significance W · polygon-valid now
- No tornado / severe thunderstorm SBW polygons right now.
NWS watch headlines
api.weather.gov alerts/active (filtered)
- No tornado / severe t-storm watches in the national feed.
Mesoscale discussions and SPC watch outlines: IEM API v1. Alerts: NWS API. Not a substitute for official products.