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 ...

PDS tornado (TOR) watches are issued when the forecaster has high confidence that multiple strong (F2-F3 on the Fujita Scale) or violent tornadoes (F4-F5 on the Fujita Scale) will occur in the watch area, while PDS severe thunderstorm (SEV) watches are issued when there is a threat of a high end “derecho” (e.g. Johns and Hirt 1987, Coniglio et ...

14 小时之前 · A tornado watch will be in effect for a large part of Alabama until 8 p.m. Saturday. It is a PDS watch, a rarely-issued watch that signifies a "particularly dangerous situation."

2001年1月1日 · REMEMBER...A Tornado Watch means conditions are favorable for tornadoes and severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and …

PDS Watch The Particularly Dangerous Situation (PDS) wording is used in rare situations when long-lived, strong and violent tornadoes are possible. This enhanced wording may also accompany severe thunderstorm watches for intense convective wind storms.

1 天前 · By Jim Stefkovich, Meteorologist, Alabama Emergency Management Agency CLANTON – Saturday, 3:15 pm March 14, 2025 A Particularly Dangerous Situation (PDS) Tornado Watch is in effect until 8 pm for much of the state. I have no doubt this watch will either be expanded eastward and/or in time to eventually cover the entire state. In…

Note: The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended. Note: Click for Watch Status Reports. SEL6 URGENT - IMMEDIATE BROADCAST REQUESTED Tornado Watch Number 36 NWS Storm Prediction Center Norman OK 730 PM CDT Fri Mar 14 2025 The NWS Storm Prediction Center has issued a * Tornado Watch for portions of Northeast Arkansas Southern Illinois Far ...

2021年3月17日 · PDS severe thunderstorm watches likely mean there is a threat of a high end derecho with widespread wind damage. Just how unusual is the PDS watch? According to the Cooperative Institute for Meteorological Studies at the University of Oklahoma, of 3058 tornado watches issued from 1996-2005, just 7% were labeled “PDS”.

2020年4月12日 · Here’s a look at PDS tornado watches issued from 1996-2005 and shows the total number of watches at a location for the 10-year period. The Southeast has gotten its fair share of enhanced tornado...

2024年4月27日 · The National Weather Service defined a PDS watch as wording used in "rare situations when long-lived, strong and violent tornadoes are possible. This enhanced wording may also accompany severe thunderstorm watches for intense convective wind storms."