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These are the first warnings issued with PDS wording, and like PDS flash flood watches, are issued by local forecast offices. [19] [20] Below is an example of a PDS Tornado Warning, issued for the 2021 Naperville–Woodridge tornado on June 20, 2021.
Tornado emergency – Enhanced wording used by the U.S. National Weather Service in a tornado warning or severe weather statement when a large, intense tornado is expected to impact a highly populated area (traverse a large city or dense suburbs).
This template supports two scales: the Fujita scale (priority) and the TORRO scale. These can be provided using the |fujita-scale= and |torro-scale= parameters, respectively. The version of the Fujita scale changes depending on the value. For example, supplying |fujita-scale=EF5 will make the template automatically use the Enhanced Fujita scale.
A severe thunderstorm watch has been issued over the Southwest Ohio region until 4 p.m., and a tornado warning has been issued in parts of Kentucky.
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Reference for the TORRO rating of this tornado. Content: suggested: Intensity reference: intensity-ref: Reference for the Fujita/TORRO rating of this tornado. Use this in case the reference is the same between both ratings. Content: optional: Header text 2: header2: Text for the second header of this tornado. Supplies the TORRO scale rating by ...
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.
The "particularly dangerous situation" wording is used in "rare situations when long-lived, strong and violent tornadoes are possible," the weather service said. "Numerous" tornadoes are expected ...