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The Midwest, including portions of Iowa, was under a “particularly dangerous situation tornado watch” on May 21. The PDS watch is a special label applied to watches by the National Weather ...
A PDS tornado watch issued on December 14, 2022. In weather forecasting in the United States, "particularly dangerous situation" (PDS) is the wording used by the National Weather Service to convey special urgency in watch or warning messages for unusually extreme and life-threatening severe weather. It is used in the format "This is a ...
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 ...
The “particularly dangerous situation” (PDS) language is added by the NWS to extreme weather watch alerts or warnings in rare cases to convey heightened urgency and risk. It has traditionally ...
The outlook included a 45% significant tornado area that was introduced at 1630Z (the first instance of a 45% area being added prior to the 20Z outlook), which is above the minimum threshold for a high risk. It also produced the first known watch (PDS tornado watch 235) with a >95% probability for all severe and significant severe hazards. [274]
Particularly dangerous situation flash flood watch FFA – Conditions are favorable for an extremely elevated level of severe and life-threatening flash flooding beyond the level of a normal flash flood watch in and close to the watch area. These watches are usually issued for a smaller area by the local WFOs than typical flash flood watches ...
A tornado watch was issued by the SPC for areas near and along the Nebraska–Iowa border region at 11:10 a.m. CDT in anticipation of these changes. [38] At 1:10 p.m. CDT, the SPC issued a tornado watch flagged as a particularly dangerous situation for much of Iowa and parts of surrounding states, including an 80% likelihood of a significant ...
The NWS has the option of adding intensified wording to tornado warning products and update statements issued as a Severe Weather Statement (SVS)—"particularly dangerous situation" (PDS) or "tornado emergency"—when a severe threat to human life and considerable or catastrophic property damage from a visually observed or radar-detected large ...