Advertise Here

View All Articles

Criteria For a Tornado Warning

The National Weather Service (NWS) is the official U.S. government agency charged with issuing severe weather watches, warnings, and advisories and is the source used by iAlert.com. When the NWS issues a “Tornado Warning” their decision is based on based on the following criteria….

Tornado Warning is Issued When:

  • A tornado is reported on the ground or is indicated by weather radar
  • A waterspout is headed for landfall
  • A rotating wall cloud, usually one that has strong low-level rotation, is reported.
  • A funnel cloud is reported.

Sample Radar Image Highlighting Tornado Location

 

Regardless of the criteria for which a tornado warning is issued under, a tornado warning means there is immediate danger for the warned area and those in the storm path should take cover immediately. Although it is well known that tornados are most common in the mid-west United States, called tornado ally, tornados can and do occur in all 50 states. U.S. tornado warnings are generated through the NWS Advanced Weather Interactive Processing System (AWIPS) and disseminated through various communication channels including

iAlert.com, the news media, NOAA Weather Radio, and where present Civil defense sirens are activated. A warning should not be confused with a tornado watch which indicates that conditions are favorable for the formation of tornadoes.

Related Articles:

This entry was posted in Weather Glossary and tagged , , , . Bookmark the permalink.

Leave a Reply

Read More

Hurricane Delta 11:00 am October 9, 2020 Advisory 20 Update, Landfall Forecast

Advisory 20 for Hurricane Delta updated at 11:00 am EDT Friday October 9, 2020: As of 11:00 am EDT Hurricane Delta remains a major category 3 hurricane with sustained winds of 115 MPH (185 KMH) and…

Read More

Hurricane Delta 5:00 pm October 8, 2020 Advisory 17 Update

Advisory 17 for Hurricane Delta updated at 5:00 pm EDT Thursday October 8, 2020: As of 5:00 pm EDT Hurricane Delta was a major category 3 hurricane with sustained winds of 115 MPH (185 KMH) and…

Read More

Hurricane Delta 11:00 am October 7, 2020 Advisory 12 Update

Advisory 12 for Hurricane Delta updated at 11:00 am EDT Wednesday October 7, 2020: As of 11:00 am EDT Hurricane Delta was strong category 2 hurricane with sustained winds of 105 MPH and was located 65…

Read More

Leave a Reply