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A watch or warning bearing the phrase is referred to as a PDS watch or PDS warning as shorthand jargon. It was first used by the Storm Prediction Center (SPC), a national guidance center of the National Weather Service , for tornado watches and eventually expanded to use for other severe weather watches and warnings by the agency's regional ...
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 flash flood watch (SAME code: FFA; also referred as a "green box" by meteorologists) is severe weather watch product of the National Weather Service that is issued when conditions are favorable for flash flooding in flood-prone areas, usually when grounds are already saturated from recent rains, or when upcoming rains will have the potential ...
In situations where atmospheric conditions will support the production of very destructive straight-line winds and hail from the convective activity, the intensified wording "particularly dangerous situation" (PDS) can be added into the watch product. PDS severe thunderstorm watches usually suggest conditions over the approximate area present a ...
On Monday afternoon, the National Weather Service issued a "potentially dangerous situation (PDS)" watch area because of the seriousness of the event. A tornado near Interstate 80 in Lincoln ...
The NWS has the option of adding enhanced wording to severe thunderstorm warnings and update statements issued as a Severe Weather Statement (SVS)—"particularly dangerous situation" (PDS), "severe thunderstorm emergency", or, as used by some Central and Southern Region offices as indicative PDS wording, "this is a very dangerous storm"—when ...
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. [273]
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