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Severe weather can occur under a variety of situations, but three characteristics are generally needed: a temperature or moisture boundary, moisture, and (in the event of severe, precipitation-based events) instability in the atmosphere.
Severe weather is one type of extreme weather, which includes unexpected, unusual, severe, or unseasonal weather and is by definition rare for that location or time of the year. [5] Due to the effects of climate change , the frequency and intensity of some of the extreme weather events are increasing, for example, heatwaves and droughts .
The categorical forecast in the Day 1-3 Convective Outlooks—which estimates a severe weather event occurring within 25 miles (40 km) of a point and derives the attendant risk areas from probability forecasts of tornadoes, damaging winds, and large hail on Days 1 and 2, and a combined severe weather risk on Day 3—specifies the level of ...
Areas of the South recently ravaged by a deadly tornado outbreak are again facing the threat of severe weather this weekend as part of a major winter storm threatening impacts to over 60 million ...
The severe weather prompted forecasters to issue a rare "particularly dangerous situation" alert, reserved for when long-lived, strong and violent tornadoes are possible.
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 for the type of event. It is used in ...
11 Tips to Protect Your Business for Cold Weather Safety NEXT helps keep 1,300+ types of small businesses nationwide safe from a wide range of events that can threaten a business, including winter ...
Safety is the central factor in deciding whether to cancel or delay. Officials may close schools to prevent accidents and other problems caused by inclement weather. Minor storms, when safety is of less concern, may cause few or no cancellations or delays. In severe inclement weather, however, only the most essential operations remain functional.