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The 2020–2023 La Niña event was a rare three-year, triple-dip La Niña. [1] The impact of the event led to numerous natural disasters that were either sparked or fueled by La Niña. La Niña refers to the reduction in the temperature of the ocean surface across the central and eastern equatorial Pacific, accompanied by notable changes in the ...
The La Nina is also blamed for the record tornado activity across the Southern U.S during Spring 2011, especially the Super Outbreak, which is the largest and costliest tornado outbreak in recorded history, as well as being one of the most violent and one of the deadliest.
The 1974 Super Outbreak was the second-largest tornado outbreak on record for a single 24-hour period, just behind the 2011 Super Outbreak. It was also the most violent tornado outbreak ever recorded, with 30 violent (F4 or F5 rated) tornadoes confirmed.
In contrast, La Niña conditions are more likely to produce severe weather outbreaks, including higher tornado counts. The proof of the status of the ENSO lies in the data, so to speak, with year ...
The weak La Niña is forecast to stick around through April before yielding once again to so-called neutral — not La Niña or El Niño — conditions, according to the Climate Prediction Center.
A weak La Niña is favored to develop. NOAA says there is a 59% chance the criteria for La Niña conditions will be met by the end of January 2025.
In late 2023, American meteorologist and tornado expert Thomas P. Grazulis created the Outbreak Intensity Score (OIS) as a way to rank tornado outbreaks. [1] [2] For the score, only significant tornadoes are counted: F2/EF2 tornadoes receive 2 points each, F3/EF3 tornadoes receive 5 points each, F4/EF4 tornadoes receive 10 points each, and F5/EF5 tornadoes receive 15 points each. [1]
Clinging La Nina ushers in spring temperature divide after last hurrah of winter, NOAA's outlook shows. Chris Oberholtz. February 20, 2025 at 10:33 AM.