What is a Severe Thunderstorm?

Definition

A severe thunderstorm is a thunderstorm that produces at least one of the following: hail 1 inch or larger, wind gusts of 58 mph or higher, or a tornado.

Causes

Severe thunderstorms are caused by the rising and cooling of moist air in an unstable atmosphere. As the air rises, it cools and condenses, releasing heat. This heat causes the air to rise even faster, and the cycle continues.

Common Elements of Severe Thunderstorms:

• Strong updrafts and downdrafts
• Lightning and thunder
• Heavy rain and sometimes hail
• Potential for tornados

Types of Severe Thunderstorms

There are three main types of severe thunderstorms:

1. Supercell Thunderstorms

Supercell thunderstorms are the most powerful and long-lived type of severe thunderstorm. They are characterized by a single, rotating updraft that can last for several hours.

2. Multicell Thunderstorms

Multicell thunderstorms are made up of several individual cells that merge together. They are typically less powerful than supercell thunderstorms, but they can still produce severe weather.

3. Squall Line Thunderstorms

Squall line thunderstorms are long, narrow lines of thunderstorms that can stretch for hundreds of miles. They are typically less severe than supercell and multicell thunderstorms, but they can still produce strong winds and heavy rain.

Preparing for a Severe Thunderstorm

There are several things you can do to prepare for a severe thunderstorm:

Before the Storm

• Have a plan for what to do if a severe thunderstorm warning is issued.
• Identify a safe place to shelter in your home, such as a basement or interior room.
• Gather supplies such as food, water, a first-aid kit, and a battery-powered radio.
• Secure loose objects around your home, such as patio furniture and trash cans.

During the Storm

• If you are outside, seek shelter immediately in a sturdy building or vehicle.
• If you are inside, stay away from windows and doors.
• Listen to the radio or television for updates on the storm.
• Do not go outside unless it is absolutely necessary.

After the Storm

• Check for injuries and damage.
• Report any damage to your insurance company.
• Stay informed about the latest weather conditions.

Conclusion

Severe thunderstorms can be dangerous, but by taking precautions, you can help to stay safe.