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Severe weather is any dangerous meteorological phenomenon with the potential to cause damage, serious social disruption, or loss of human life. [1] [2] [3] These vary depending on the latitude, altitude, topography, and atmospheric conditions.
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.
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 ...
The nation’s next major storm system is set to sweep across the U.S. this week and bring the potential for a wide range of threats, including heavy snow, flash flooding and severe weather.
The warm and humid conditions relative to late December will help to fuel severe weather. The overall extent of severe weather on Sunday may be most impressive-perhaps reaching a dozen or more ...
Severe thunderstorms and flooding rainfall are pounding a large portion of the central and southern United States Monday, including areas still recovering from destructive storms over the weekend.
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.
The same conditions that fueled last week's storms — an area of low pressure combined with strong southerly winds — will make conditions ideal for another round of severe weather Tuesday into ...