Severe Weather Awareness - Severe Thunderstorms (2024)


Thunderstorms are a common occurrence in Alabama, Mississippi, and Florida at any time of the day, month, or year. There are about 2,000 thunderstorms in progress around the world at any given moment. However, less than 1% of these thunderstorms are classified as "severe".Severe thunderstorms are defined as thunderstorms that produce 1-inch hail or larger and/or strong wind gusts of 58mph or greater. Severe hail that is 1 inch in diameter is roughly the size of a quarter.

All thunderstorms generate potentially deadly lightning.However, lightning in a thunderstorm does NOT mean that the thunderstorm is severe. A small percentage ofsevere thunderstorms produce tornadoes with little or no lightning at all.

Across the region, severe thunderstorms typically occur during the late afternoon and evening hours but can develop at any time. While severe thunderstorms can occur any month of the year,the peak Severe Weather Season is during the spring months of March, April, and May. Alabama, Mississippi, and northwest Florida also have a secondary Severe Weather Season in the fall that typically runs from November through December.

Severe Weather Awareness - Severe Thunderstorms (1)

Severe Thunderstorm WATCH
means conditions are favorable for the development of severe thunderstorms in and close to the watch area.People located in and around the WATCH area should keep an eyeon the sky and listen to theirNOAA All Hazards Weather Radio or tune in to the local broadcast media for further weather information. Typically, a WATCH lasts around 6 hours and covers a relatively large area. Simply put, it meansBE ALERT!

Severe Thunderstorm WARNING
means either a severe thunderstorm is occurring, is detected by National Weather Service Doppler Radar, or a reliable report has been received. People in the WARNING area should take immediate action to protect their lives, the lives of others, and their property. Tornadoes canand occasionally do accompany severe thunderstorms.Treat this WARNING the same as you would for a Tornado Warning by taking theproper safety precautions. A WARNING isissued for smaller, more specific locations and generally last for less than one hour. Simply put, it meansTAKE ACTION!

Severe Weather Awareness - Severe Thunderstorms (2)

Severe Thunderstorm Safety Rules:

Thunderstorms typically do not last very long and will most often pass by your location in less than one hour.

The best defense against thunderstorms is to stay inside a sturdy,substantial building that can protect you from lightning, hail, damaging wind, heavy rain, and tornadoes.

If caught outside, try to find shelter immediately.

Once in a shelter, stay away from windows and avoid electrical equipment.

Be sure to secure loose objects outside as these objects often become dangerous flying debris in high winds.

Severe Weather Awareness - Severe Thunderstorms (3)Severe Weather Awareness - Severe Thunderstorms (4)

Additional InformationSevere Weather Awareness - Severe Thunderstorms (5)

NWS Storm Prediction Center

National Severe Storms Lab

Severe Weather Safety

StormReady Program

YouTube - Severe Thunderstorm Safety (ASL/CC)
YouTube - NWS Memphis: Severe Weather Preparedness
YouTube - Preparedness Videos
YouTube - Severe Weather Videos

mPing App

Brochure - Thunderstorms, Tornadoes, Lightning...Nature's Most Violent Storms

Severe Weather Awareness - Severe Thunderstorms (2024)

FAQs

Severe Weather Awareness - Severe Thunderstorms? ›

Severe Thunderstorm Safety Rules:

What does severe thunderstorm mean in weather? ›

A thunderstorm is classified as “severe” when it contains one or more of the following: hail one inch or greater, winds gusting in excess of 50 knots (57.5 mph), or a tornado. How many thunderstorms are there?

What are the four types of severe weather? ›

Severe Weather 101
  • Thunderstorms. There can be as many as 40,000 thunderstorms each day around the world. ...
  • Tornadoes. Much about tornadoes remains a mystery. ...
  • Floods. Except for heat-related fatalities, more deaths occur from flooding than any other weather-related hazard. ...
  • Lightning. ...
  • Hail. ...
  • Damaging Winds. ...
  • Winter Weather.

What are the 2 types of severe thunderstorms? ›

Multicell storms may produce hail, strong winds, brief tornadoes, and/or flooding. A squall line is a group of storms arranged in a line, often accompanied by “squalls” of high wind and heavy rain.

How rare are severe thunderstorms? ›

Approximately 16 million thunderstorms occur each year around the world and 100,000 occur in the U.S. Of those 100,000 storms, only about 10% are severe. The National Weather Service defines a severe thunderstorm as one which produces winds of 58 mph or greater, 3/4 inch hail or larger or tornadoes.

Is a 5% tornado risk high? ›

The National Weather Service's Storm Prediction Center puts Sacramento, Stockton, Modesto, Roseville and Elk Grove at the highest risk — 5% — of getting hit by a tornado Monday, with Concord, Vallejo, Antioch, Fairfield, Vacaville and Livermore at a 2% risk.

Should you shower during a thunderstorm? ›

It is not safe to shower during a thunderstorm. If lightning strikes a building, it may travel through water pipes and increase the risk of electrocution. To lower this risk, people should avoid all water-based activities during a thunderstorm, including bathing and washing the dishes.

What is the most deadliest severe weather? ›

Violent winds from a hurricane or tornado, lightning from thunderstorms, and rising floodwaters come to mind. But the weather event that actually produces the greatest number of fatalities is heat.

What do you see first in a thunderstorm? ›

A person on the ground sees the lightning flash before hearing the thunder because light at a speed of around 300,000,000 meters per second travels much faster than sound which moves at 340 meters per second.

What is derecho? ›

A derecho (pronounced similar to "deh-REY-cho") is a widespread, long-lived wind storm that is associated with a band of rapidly moving showers or thunderstorms.

Where is the most stormy place in the world? ›

Lake Maracaibo is the region with the most lightning in the world, with 233 lightning strikes per km2 per year.

Can a severe thunderstorm turn into a tornado? ›

Severe thunderstorms can produce tornadoes with little or no advance warning. Lightning frequency is not a criteria for issuing a severe thunderstorm warning. They are usually issued for a duration of one hour. They can be issued without a Severe Thunderstorm Watch being already in effect.

What is the most violent stage of a thunderstorm? ›

The mature stage is the is the most dangerous stage and the most likely time for hail, heavy rain, frequent lightning, strong winds, and tornadoes.

What state has the most severe thunderstorms? ›

So, the regular presence of air parcels that can become positively buoyant and a plethora of boundaries and low-level convergence to give parcels a push upward makes Florida the thunderstorm (and lightning) capital of the U.S.!

What was the worst thunderstorm in history? ›

Flexi Says: The largest observed thunderstorm as measured by voltage occurred in India on December 1, 2014. Sunil Gupta, a scientist at the Tata Institute of Fundamental Research in Mumbai, and his colleagues used a muon telescope to measure the electric potential of this thunderstorm at 1.3 billion volts!

What is the #1 cause of deaths associated with thunderstorms? ›

Flooding is responsible for more fatalities—more than 75 annually—than any other thunderstorm-associated hazard.

What happens during a severe thunderstorm? ›

Some severe thunderstorms can produce hail larger than softballs or winds over 100 mph, so please pay attention to the weather so you know when severe storms are possible. Thunderstorms also produce tornadoes and dangerous lightning; heavy rain can cause flash flooding.

Should I be worried about severe thunderstorms? ›

If the warning includes your neighborhood or work place, you should take immediate action to protect your life and the lives of others. Severe thunderstorms can produce large hail and damaging winds. Tornadoes can and occasionally do accompany severe thunderstorms.

Is a severe thunderstorm warning worse than a watch? ›

Watch - Conditions are favorable for the severe weather event in or near the watch area. When a watch is announced, stay alert and be ready to take action. Warning - Severe weather event is imminent or occurring in the warned area. Take action based on the emergency at hand.

Is it safe to drive in a severe thunderstorm? ›

Surprisingly, it is your car's metal body that could offer a level of protection. If you're caught in a storm while driving, you are safest in an enclosed, metal vehicle. (This means hard-topped cars with all of the windows shut.)

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