See the factsheets below for a full breakdown of Warning tags by hazard:
Tornado Warning
Tag: Radar Indicated
Evidence on radar and near storm environments is supportive of a tornado, but not confirmed.
 |
 |
Tag: Catastrophic
Used when a severe threat to human life and catastrophic damage from a tornado is occurring; only used when reliable sources confirm a violent tornado.
 |
 |
Severe Thunderstorm Warning
Tag: Destructive
Used for thunderstorms with hail at least 2.75 inches in diameter (baseball-sized) and/or thunderstorm winds of at least 80 miles per hour.
 |
 |
Flash Flood Warning
Tag: [Dam or Levee] Failure
Used to provide additional information about the status of the failing dam or levee, whether it is “imminent” or “occurring”.
 |
 |
Snow Squall Warning
Tag: Significant
Used only when snow squalls pose a substantial threat to safe travel.
 |
 |
