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The Storm Prediction Center issues convective outlooks (AC), consisting of categorical and probabilistic forecasts describing the general threat of severe convective storms over the contiguous United States for the next six to 192 hours (Day 1 through Day 8). These outlooks are labeled and issued by day, and are issued up to five times per day.
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 Storm Prediction Center issues daily outlooks denoting the risk for severe weather and wildfires for specific regions in the United States. For severe weather, which includes the risk for thunderstorms, tornadoes, hail, and straight-line winds, there are five risk levels indicating the probability for these hazards: marginal, slight, enhanced, moderate, and high.
AccuWeather predicts 1,055 to 1,200 twisters will touch down across the United States throughout 2023, slightly below the historical average of 1,225. Even with a fast and furious start to March ...
This chart explains the various threat levels when it comes to severe thunderstorm outlook categories. Another round of severe weather in forecast Tuesday’s weather will kick off a stormy period ...
Prognostic chart. A prognostic chart is a map displaying the likely weather forecast for a future time. Such charts generated by atmospheric models as output from numerical weather prediction and contain a variety of information such as temperature, wind, precipitation and weather fronts. They can also indicate derived atmospheric fields such ...
The weather service office of Chicago also warned of the outbreak of storms and threats possible through the evening. In Chicago, the highest severe weather risk will be from 7 p.m. to 1 a.m ...
Hazardous weather outlook. In National Weather Service (NWS) terminology, a Hazardous Weather Outlook is a weather statement issued to provide information of potential severe weather events within the next seven days. The outlook may include information about potential severe thunderstorms, heavy rain or flooding, winter weather, extremes ...