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  2. List of severe weather phenomena - Wikipedia

    en.wikipedia.org/wiki/List_of_severe_weather...

    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.

  3. Severe weather - Wikipedia

    en.wikipedia.org/wiki/Severe_weather

    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 .

  4. Extreme weather - Wikipedia

    en.wikipedia.org/wiki/Extreme_weather

    A tornado is an example of an extreme weather event. This tornado struck Anadarko, Oklahoma during a tornado outbreak in 1999. Extreme weather includes unexpected, unusual, severe, or unseasonal weather; weather at the extremes of the historical distribution—the range that has been seen in the past.

  5. Southern states declare emergencies ahead of potentially ...

    www.aol.com/coldest-wind-chills-years-threaten...

    A National Weather Service forecast warned, “this should be considered a generational winter storm event and its impacts should be taken seriously.” Travel could be snarled for days

  6. Severe weather, flooding dangers to span nearly 20 states - AOL

    www.aol.com/weather/severe-weather-flooding...

    AccuWeather forecasters warn that severe weather dangers may press eastward across the Southern states through Friday night. Residents are encouraged to have a way to receive severe weather alerts ...

  7. Conditions that fueled L.A. fires were 35% more likely ... - AOL

    www.aol.com/conditions-fueled-l-fires-were...

    The hot, dry, windy conditions that led to the recent Southern California fires were about 35% more likely because of climate change, a new report says. The findings come from the World Weather ...

  8. List of Storm Prediction Center high risk days - Wikipedia

    en.wikipedia.org/wiki/List_of_Storm_Prediction...

    A high risk severe weather event is the greatest threat level issued by the Storm Prediction Center (SPC) for convective weather events in the United States. On the scale from one to five, a high risk is a level five; thus, high risks are issued only when forecasters at the SPC are confident of a major severe weather outbreak.

  9. Weather-related cancellation - Wikipedia

    en.wikipedia.org/wiki/Weather-related_cancellation

    For example, schools may open school on some federal holidays, shorten spring break, or sometimes make the school year end later. However, some schools are more forgiving, and do not mandate make-up days. In the event of heavy snow, tools have arisen to help students calculate the chance of a weather-related cancellation, most commonly snow days.