Lightning

Description

Source: Environment Canada, 2017

Lightning is the occurrence of a natural electric discharge of very short duration and high voltage between a cloud and the ground or within a cloud, accompanied by a bright flash and typically also thunder.

This section includes:

Background information on Lightning; and
Sample Lightning Preparedness Guide

Recent Resources

Dec. 07, 2025

Index Scale and Weather Information

Dec. 07, 2025

Physical Activities of Higher Risk – Requirements for Day and Overnight Trips

Sep. 18, 2025

Concussion Protocols

Sep. 16, 2023

MPASS Revisions – September 2023

Jul. 07, 2023

Waivers and Informed Consent

Have questions? Ask MPASS

Please let us know what your questions are. You can submit inquiries regarding existing safety plans, feedback on website functionality, and suggestions / requests for new activity safety plans.

Ask MPASS