Radar Assistance Web Site
Hail Forecasting
Element | Useage |
Environment |
SPC -10C to -30C CAPE |
Hail Lapse Rate in AWIPS (0C to -20C) of -6.5C or stronger | |
Radar | Storm Top Divergence: Earliest Signal - Best Correlation |
50dbz > -20C Height: Hail Probable | |
50dbz > Donavon 1" Hail Height: Severe Hail Likely | |
Three Body Scatter Spike (TBSS): Severe Hail | |
50 dbz > 30kft: Significant Severe Hail Probable | |
60dbz > -20C Height: Significant Severe Hail Probable | |
Melting | Keep in mind that if the storm lacks tilt, the hail will fall through the updraft, causing significant melting to occur. So, mid-level shear (pre-storm)/user identified meso/tilted updraft (storm) = favorable significant hail |
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Meso Nomograms
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Radar VCP and Scan Strategies
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