Preparing for VORTEX2 using TWOLF with phased array radar
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Preparing for VORTEX2 using TWOLF with phased array radar
D. Emmitt and H. BluesteinWG-SBLW Meeting
February 3, 2010
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VORTEX2
• 2010 NSF/NOAA field program (1 May – 15 June) with participation by other agencies and institutions.
• VORTEX2 is fully nomadic with no home base. Scientists will roam from state to state following severe weather outbreaks through the Plains.
• NPS (CIRPAS) is participating by providing a vehicle with a radar and Doppler wind lidar
• P3DWL goal is to investigate the PBL circulations prior to and during tornado development.
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Science Questions
• How, when, and why do tornadoes form? Why some are violent and long lasting while others are weak and short lived?
• What is the structure of tornadoes? How strong are the winds near the ground? How exactly do they do damage?
• How can we learn to forecast tornadoes better?
Current warnings have an only 13 minute average lead time and a 70% false alarm rate.
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TWOLF
• Truck (or Tornado) Wind Observing Lidar Facility
• Using much of the TODWL system with exceptions:– Hemispherical scanner borrowed from ARL (Dave
Ligon)– Modified software for +- 125m/s wind
measurements
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CIRPAS Mobile Weather Radar- X-band phased array
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TWOLF
X band Phased-array
Bob Bluth
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