What is "severe thunderstorm watch"?

Detailed explanation, definition and information about severe thunderstorm watch

Detailed Explanation

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A severe thunderstorm watch is a weather alert issued by the National Weather Service (NWS) to inform people that conditions are favorable for the development of severe thunderstorms in a particular area. This watch is typically issued several hours in advance of the potential severe weather event to give residents and authorities time to prepare and stay informed. It is important to understand the difference between a watch and a warning when it comes to severe weather events. A watch means that conditions are favorable for the development of severe weather, while a warning means that severe weather is imminent or already occurring in the area.

Severe thunderstorms are characterized by intense thunder and lightning, heavy rain, hail, strong winds, and sometimes tornadoes. These storms can cause significant damage to property, disrupt transportation and communication systems, and pose a threat to human life. By issuing a severe thunderstorm watch, the NWS aims to alert the public to the potential dangers and help them take necessary precautions to stay safe.



There are several criteria that must be met for a severe thunderstorm watch to be issued. These criteria include the potential for hail one inch in diameter or larger, wind gusts of 58 miles per hour or stronger, and the possibility of tornadoes. When these conditions are forecasted to occur, the NWS will issue a watch for the affected area. It is important for residents to pay close attention to weather updates and be prepared to take action if necessary.

During a severe thunderstorm watch, it is recommended to stay indoors and away from windows, doors, and electrical appliances. It is also advisable to secure outdoor furniture, vehicles, and other loose objects that could be blown away by strong winds. If you are driving when a severe thunderstorm watch is issued, it is best to pull over to a safe location and wait until the storm passes before continuing your journey.



In addition to the NWS, there are other sources of information available to help people stay informed during a severe thunderstorm watch. Local news stations, radio stations, and weather websites often provide updates on severe weather events and offer safety tips to help residents stay safe. It is important to have multiple sources of information to ensure that you are well-informed and prepared for any potential risks.

As climate change continues to impact weather patterns around the world, severe thunderstorms are becoming more frequent and intense. Warmer temperatures can lead to an increase in atmospheric instability, which in turn can fuel the development of severe thunderstorms. In recent years, there have been several high-profile severe thunderstorm events that have caused significant damage and loss of life, highlighting the importance of being prepared and staying informed during severe weather events.



One example of a severe thunderstorm event that had a major impact was the derecho that struck the Midwest United States in August 2020. A derecho is a widespread, long-lived wind storm that is associated with a fast-moving line of severe thunderstorms. The August 2020 derecho traveled over 700 miles, causing widespread damage and power outages in Iowa, Illinois, Indiana, and other states. The storm produced wind gusts of over 100 miles per hour, equivalent to a Category 2 hurricane, and resulted in several fatalities and billions of dollars in damage.

In conclusion, a severe thunderstorm watch is a weather alert issued by the National Weather Service to inform people that conditions are favorable for the development of severe thunderstorms in a particular area. It is important to take these watches seriously and be prepared to take action if necessary. By staying informed and following safety guidelines, you can protect yourself and your loved ones during severe weather events. Remember, it is always better to be safe than sorry when it comes to severe weather. Stay informed, stay safe.