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PDS tornado warnings are currently issued on an experimental basis by the 38 National Weather Service Weather Forecast Offices within the Central Region. [16] The criteria for a PDS warning are when a tornado on the ground has been spotted or confirmed, or a significant tornado is expected based on radar signatures.
PDS is a label used in situations when “there’s an expectation of particularly violent tornadoes possible,” said Andy Ervin with the National Weather Service's office in the Quad Cities.
An example of a tornado warning polygon issued by the National Weather Service. A tornado warning (SAME code: TOR) is a public warning that is issued by weather forecasting agencies to an area in the direct path of a tornado, or a severe thunderstorm capable of producing one, and advises individuals in that area to take cover.
The PDS wording can be incorporated into the text of a tornado warning, either upon its initial issuance or in a "severe weather statement" providing updated information on the storm, when a considerable tornado debris signature is detected on radar or a large tornado is visually observed.
A tornado warning means "take action now" as a tornado has been sighted or is indicated by weather radar. There is imminent danger to life and property. ... Tornado watch vs. warning: The meaning ...
The NWS states, “a warning is used for conditions posing a threat to life or property.” If a severe weather warning has been issued for your area, you should seek shelter in a strong building ...
The warning is then disseminated to the public through terrestrial television and radio stations, online media, mobile app and SMS messaging through Emergency Mobile Alert (EMA); if a tornado has been sighted or indicated by radar within the warned area during the severe thunderstorm warning's duration, civil defense sirens, if present, are ...
A tornado warning means a tornado has been sighted or is indicated by weather radar. According to the National Weather Service, a tornado warning means there’s imminent danger to life and ...