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QLCS

• Rotation spins from ground up
• Spikes in low level Delta V / shear at time of touchdown
• Rotation ~12 minutes prior to touchdown

Notes:

Previous local research for our region has indicated that QLCS tornadoes typically occur with rotation that develops first at low-levels, then spins upward into mid-levels of the storm. Rotation develops just prior to tornado touchdown, making it difficult to issue warnings with much lead time.