Tornado: National Weather Service issues watch

The National Weather Service has issued a tornado watch for this area until 10 p.m. tonight. The Watch includes two counties in southern Connecticut, Fairfield and New Haven counties.

It has also been issued for five counties in northeast New Jersey and 10 counties in southeast New York.

The National Weather Service also said there is a chance for severe thunderstorms this afternoon and evening. The main threat will be damaging winds with a small chance for large hail.

A tornado “watch” (as opposed to the more serious “warning”) is issued by the National Weather Service when conditions are favorable for the development of tornadoes in and close to the watch area. Their size can vary depending on the weather situation. They are usually issued for a duration of four to eight hours. They normally are issued well in advance of the actual occurrence of severe weather. During the watch, people should review tornado safety rules and be prepared to move a place of safety if threatening weather approaches, the service said.

A “watch” is issued by the Storm Prediction Center (SPC) in Norman, Oklahoma. Prior to the issuance of a Tornado Watch, SPC will usually contact the affected local National Weather Forecast Office (NWFO) and they will discuss what their current thinking is on the weather situation. Afterwards, SPC will issue a preliminary Tornado Watch and then the affected NWFO will then adjust the watch (adding or eliminating counties/parishes) and then issue it to the public. After adjusting the watch, the NWFO will let the public know which counties are included by way of a Watch Redefining Statement. During the watch, the NWFO will keep the public informed on what is happening in the watch area and also let the public know when the watch has expired or been cancelled.

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