lightening_probability: lightening_levels

In AllisonBaileyR14/nature_package:

Description

This function reports the numerical lightening level random probabilities and the categorization for each lightening level.

Usage

lightening_probability(lightening_sample = 100)

Arguments

lightening_sample

Number of samples taken of thunder and lightening Lightning Activity Level is rated on a scale of 1 to 6 as described below: LAL 1— No thunderstorm or building cumulus clouds observed. LAL 2— A single or few building cumulus clouds with only an occasional one reaching thunderstorm intensity observed. Thunderstorms or lightning need not be observed for this activity level to be assigned; however at least one large cumulus cloud must be present. LAL 3— Occasional lightning (an average of 1 to 2 cloud -to-ground strikes per minute) is observed. Building cumulus clouds are common; thunderstorms are widely scattered. LAL 4— Frequent lighting (an average of 2 to 3 cloud-to-ground strikes per minute) is observed. Thunderstorms are common and cover 10 to 30 percent of the sky. Lightning is primarily of the cloud-to-cloud type but cloud-to-ground lightning may be observed. LAL 5— Frequent and intense lightning (cloud-to-ground strikes greater than 3 per minute) is observed. Thunderstorms are common, occasionally obscuring the sky. Moderate to heavy rain usually precede and follow the lightning activity. Lightning of all kinds (cloud-to-cloud, in-cloud and cloud-to-ground) is characteristically persistent during the storm period. LAL 6— A dry lightning situation. Low lightning flash rate observed (less than one to three cloud-to-ground strikes per 5-minute period per storm cell passage). Scattered towering clouds with a few thunderstorms; bases of the clouds are high. Virga is the predominate form of precipitation.

Value

Frequency of each lightening level occurrence.

Author(s)

Allison Bailey

Source

National Park Service - https://www.nps.gov/articles/understanding-fire-danger.htm

AllisonBaileyR14/nature_package documentation built on March 22, 2021, 11:02 p.m.