Now the pre GCK storm is the western end of a squall line moving southeast with a dominant cold pool.

Craig’s considering removing the current hail threat area for the western cell. Maybe they’ll consider dropping probabilities.

Craig would issue a severe warning for the entire line for the wind threat but would consider keeping hail threat more cellular based.

Greg suggests at 0056 UTC to create new threat area for the cell to the east so that they can practice polygon threat areas.

Overview: The warning valid times are still equivalent to legacy polygon warnings. There’s considerable uncertainty about when to think multicell-based threat area vs. individual cell. When to transition is a big question.

Jim LaDue (EWP Weekly Coordinator, 5-9 May)