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EF4. 97 mph (156 km/h) 6. Tornado outbreak of April 13–16, 2012 – This was day 2 of aforementioned outbreak; it was only the second high risk to be issued on Day 2 (the day before the event; first Day 2 high risk was for April 7, 2006) and the first/only to date ever issued on the initial (0600Z) Day 2 outlook. [277]
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.
English: SPC's Day 1 convective outlook issued at 06:00Z (12:00 AM CDT) on `March` `25`, `2021`, indicating a High and enhanced risk over the southwestern US. Date 24 March 2021 05:59:15.
On May 30, two days before the outbreak, the Storm Prediction Center (SPC) noted the possibility of a severe weather event in the Northeastern United States in their outlook. A storm system was forecast to draw warm, moist air (with dew points over 60 °F (16 °C)) from the south, ahead of a driving cold front.
English: The National Weather Service (NWS) Storm Prediction Center (SPC) based in Norman, Oklahoma, issued this Day 1 Convective Outlook on May 24, 2011, at 1630Z UTC, forecasting a high risk of severe weather in parts of the Great Plains. This image is the Categorical Outlook Graphic.
The Storm Prediction Center's Day 1 convective outlook for May 21, 2024, issued at 1300Z, indicating a moderate risk for severe weather over much of Iowa and nearby parts of Wisconsin, Illinois, Missouri, and southeastern Minnesota.
SPC's Day 1 convective outlook for May 16, 2024, issued at 2000Z, indicating an enhanced risk for severe weather from southeast Texas into southwest Louisiana. On May 14, the Storm Prediction Center (SPC) outlined a level 2/Slight risk for severe weather across portions of central and northern Texas. [11]
The Storm Prediction Center's Day 1 convective outlook for May 21, 2024, issued at 1300Z, indicating a moderate risk for severe weather over much of Iowa and nearby parts of Wisconsin, Illinois, Missouri, and southeastern Minnesota.