Lightning activity level (LAL) is a scale that describes degrees and types of lightning activity. Values are labeled 1–6.[1]
| Level | Description |
|---|---|
| 1 | No thunderstorms |
| 2 | Isolated thunderstorms. Lightning is very infrequent, 1–5 cloud-to-ground strikes in a five-minute period. |
| 3 | Widely scattered thunderstorms. Lightning is infrequent, 6–10 cloud-to-ground strikes in a five-minute period. |
| 4 | Scattered thunderstorms. Lightning is frequent, 11–15 cloud-to-ground strikes in a 5-minute period. |
| 5 | Numerous thunderstorms. Lightning is frequent and intense, greater than 15 cloud-to-ground strikes in a five-minute period. |
| 6 | Dry lightning (same as LAL 3 but without rain). This type of lightning has the potential for starting fires, and is normally highlighted in fire weather forecasts with a red flag warning. |
References
- ↑ "Lightning Activity Level (LAL)". NOAA / NWS. Retrieved 18 March 2014.
| General | |||||
|---|---|---|---|---|---|
| Electromagnetism |
| ||||
| Sources | |||||
| Applications | |||||
| People | |||||
| |||||
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.