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PDS watches and warnings alike are quite uncommon; less than 3% of watches issued by the SPC from 1996 to 2005 were PDS watches, or an average of 24 each year. [3] When a PDS watch is issued, there are often more PDS watches issued for the same weather system, even on the same day during major outbreaks, so the number of days per year that a ...
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 ...
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 ...
The tornado then turned due east, snapping and uprooting more trees north of Princeton before briefly strengthening to high-end EF2 intensity, along KY 293. A mobile home was destroyed, a home was completely unroofed, and trees were snapped. Another home suffered minor roof damage as well. [82] [97]
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 ...
Environmental conditions supportive of strong tornadoes, which is usually the case when a Particularly Dangerous Situation Tornado Watch is in effect. The National Weather Service office in Nashville, Tennessee, also created criteria to declare a tornado emergency within a tornado warning statement effective January 1, 2011. It states, "Tornado ...
Even if nations meeting in Paris curtail carbon emissions, a growing number of communities will be exposed to threats caused by climate change. Vulnerable populations that live near water or in arid places will face massive disruptions to their way of life: Flooding and severe drought are on course to become much more common. +2 degrees +4 degrees
A second PDS Tornado Watch (watch #199) was issued at 2:45 p.m. CDT for much of Oklahoma and western portions of north Texas, indicating >95% probabilities for all severe hazards (including probabilities of at least two tornadoes and one or more strong tornadoes [rated EF2 or higher], ten or more cases of straight-line thunderstorm winds of at ...