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A watch is not required for a thunderstorm- or other hydrological-based weather warning to be issued; severe thunderstorm warnings are often issued when a severe thunderstorm watch is not active (i.e., when a tornado watch is active or, less frequently, if severe convective storms are not expected to be of broad enough coverage to require a watch).
A severe thunderstorm warning indicates the warned area is in impending danger from hail or wind speeds meeting warning criteria as well as from lightning and hydrological impacts associated with the storm cell. Severe thunderstorms can and occasionally do produce tornadoes without warning. [2] While not all severe thunderstorms produce ...
Here's what to know about the differences between a severe weather watch or warning from the National Weather Service.
Severe thunderstorm warning (SVR) – A severe thunderstorm is indicated by Doppler weather radar or sighted by Skywarn spotters or other persons, such as local law enforcement. A severe thunderstorm contains large damaging hail of 1 inch (2.5 cm) in diameter or larger, and/or damaging winds of 58 mph (93 km/h) or greater.
Severe thunderstorm watch vs. severe thunderstorm warning. Severe thunderstorms — which are defined by the National Weather Service as storms with “winds of 58 mph or higher and/or hail 1 inch ...
Generally, a warning covers a smaller geographic area and comes when the threat is more “imminent,” McClatchy News reported. For example, the weather service puts out a tornado watch “when ...
Particularly dangerous situation. In weather forecasting in the United States, " particularly dangerous situation " ( PDS) is enhanced wording used by the National Weather Service to convey special urgency in some watch or warning messages for unusually extreme and life-threatening severe weather events, above and beyond the average severity ...
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