Transcript
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Identification of hail cases in the HBT area using Vaisala's
HydroClass ™ -product
Reino Keränen
Jari Tuovinen
Tuomo Bergman
Janne Ylläsjärvi
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Motivation
• Test HydroClass™-product in two different hail/graupel-cases.
• Learn to use HTB-data
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Research methods
• Case selection from eye-witness reports.
• Comparision of HydroClass™ data with other Vaisala/HY dual-pol. radar data.
• Resolving Synoptic situation (NCEP-reanalysis, SYNOP/testbed-surface mesourements).
• Effort to find hail observations on WXT510-station data.
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Sample data15.05.2006
5 cm layer of graupel in Paippinen
HydroClass
Reflectivity
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Sample data
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What we hope to learn?
• HydroClass ™ capabilities to detect hail/graupel in varying conditions.
• WXT510-station possibilities to detect hail/graupel.