Lightning Activity Level (LAL)

Lightning Activity Level (LAL)

Level   LAL Indicators
LAL1 · No thunderstorms
LAL2 · Isolated thunderstorms.
  · Light rain occasionally reaches the ground.
  · Lightning very infrequent.
  · 1-5 strikes in 5 minutes.
LAL3 · Widely scattered thunderstorms.
  · Light to moderate rain will reach the ground.
  · Lightning is infrequent.
  · 6-10 strikes in 5 minutes.
LAL4 · Scattered thunderstorms.
  · Moderate rain is commonly produced.
  · Lightning is frequent.
  · 11-15 strikes in 5 minutes.
LAL5 · Numerous thunderstorms.
  · Rainfall is moderate to heavy.
  · Lightning is frequent and intense.
  · More than 15 strikes in 5 minutes.
LAL6 · Widely scattered dry thunderstorms.
  · No rain reaches the ground.
  · Lightning is infrequent.
  · May constitute the issuance of a Red Flag Warning.

Weather Watch/Weather Warning
A Watch is used when the risk of a hazardous weather or hydrologic event has increased significantly, but its occurrence, location, and/or timing is still uncertain.

A Warning is issued when a hazardous weather or hydrologic event is occurring, is imminent, or has a very high probability of occurring. A warning is used for conditions posing a threat to life or property.