Severe Thunderstorm Warning: What You Need to Know

A severe thunderstorm warning is issued by the National Weather Service (NWS) when a thunderstorm is producing, or is forecast to produce, damaging conditions. These conditions specifically include:

• Hail of 1 inch in diameter or larger: Hail of this size can cause significant damage to vehicles, homes, and crops.
• Wind gusts of 58 mph or greater: These winds are strong enough to break tree limbs, down power lines, and cause structural damage to buildings.

It’s important to understand the difference between a thunderstorm watch and a warning. A watch means that conditions are favorable for severe thunderstorms to develop in the watch area. A warning, on the other hand, means that a severe thunderstorm has been spotted by a trained spotter or indicated by weather radar, and is an immediate threat to life and property.

What to Do During a Severe Thunderstorm Warning

If a severe thunderstorm warning is issued for your area, take immediate action to protect yourself and your family. Here are some important safety tips:

• Seek shelter indoors: The safest place to be is inside a sturdy building. Avoid sheds, barns, or other small structures that could be easily damaged by wind or hail.
• Stay away from windows: Windows can shatter during strong winds or hail, causing injury. Move to an interior room or hallway.
• Avoid electrical appliances and plumbing: Lightning can travel through electrical and plumbing systems. Unplug appliances and avoid using telephones or plumbing fixtures.
• Listen to weather updates: Stay informed about the storm’s progress by monitoring local news, weather radio, or the NWS website or app.
• If you are driving: Pull over to the side of the road, away from trees and power lines. Stay in your vehicle with your seatbelt fastened. Avoid touching metal parts of the car.
• If you are outdoors: Seek shelter in a sturdy building immediately. If no shelter is available, crouch low to the ground in a ditch or other low-lying area. Avoid tall trees or other isolated objects.

Understanding the Warning

Severe thunderstorm warnings typically include details such as the location of the storm, its direction of movement, and the expected hazards. Pay close attention to these details to determine if you are in the path of the storm. The warning will also provide an expiration time, but the storm could intensify or shift, leading to an extension or reissuance of the warning.

After the Storm

After the storm has passed, be aware of potential hazards such as downed power lines, flooding, and debris. Report any damage to your insurance company and local authorities. Stay informed about the potential for additional severe weather.

Taking severe thunderstorm warnings seriously can save lives and prevent injuries. Preparedness and quick action are key to staying safe during these dangerous weather events.