TWISTER Act

The TWISTER Act amends the Weather Research and Forecasting Innovation Act of 2017 to expand the goals of the tornado warning improvement program. It directs the Under Secretary to develop innovative tornado forecasts and warnings with specific new focuses: fast-developing storms (like derechos), areas historically without tornadoes, and evening/nighttime tornadoes. The bill does not create new funding or change existing regulations but updates the program's requirements for research priorities. It directly affects the National Weather Service’s research program under the Department of Commerce. This is a procedural update to existing federal weather research goals.