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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 do produce tornadoes without warning. [2] While not all severe thunderstorms produce tornadoes, they can ...
Since its initial usage in May 1999, the National Weather Service (NWS) in the United States has used the tornado emergency bulletin, an unofficial, high-end classification of tornado warning—sent through either the issuance of a warning or via a "severe weather statement" that provides updated information on an ongoing warning—that is issued when a violent tornado (confirmed by radar or ...
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.
When severe weather looms, storm alerts are important tools for keeping people informed. The National Weather Service shares alerts as it warns of potential risks from thunderstorms, flooding ...
Watches usually cover a large area where severe weather conditions could develop. Kidding aside, a watch means conditions are favorable for severe weather/flooding to develop while a warning means ...
Stroke symptoms may seem to come on suddenly, but there may be warning signs in some situations. A severe headache, or any unusual type of headache, is one potential warning sign of a stroke ...
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 ...
increased shortness of breath. swelling in the ankles, legs, abdomen, or other parts of your body. fatigue. chest discomfort. sudden weight gain. reduced exercise tolerance. persistent cough or ...