Issued 1st SVR for Boulder, CO.  CI did not show any indication that this cell would develop. Have a feeling that it may have been identified earlier as weaker pulse cells tried earlier in the day to form but did not re-identify it (Algorithm possibly thought convection already occurred?)

Basis for warning was made solely from traditional radar interrogation (mid-level meso, TBSS (fig 1), 55dbz above 30kft, supercell shape). ProbSevere only showed impressive values after the warning decision was made. (ProbSevere=82%, MESH=1.0, Lightning Jump 2.0 sigma (fig 2)). We were not using ENI at this workstation. Overall, only 5 CG strike were shown on NLDN during the intensification. In this case, the experimental products served as a confidence builder.  The pGLM data was not working at this time. Did receive a report of half-dollar size hail at 2135z. –Cattywampus

Fig 1: 2120z TBSS visible w/ super-cell shape developing.

Fig 2: 2122z Sigma 2 jump occuring