A supercell thunderstorm developed north of San Angelo TX at about 2030Z, and became severe as it moved east. After the storm made a hard right turn and began moving southeast, it grew to an extreme level of intensity, especially with regard to hail potential.

About a half hour later, t he storm continued to strengthen, now showing a TBSS with > 30 dBZ and a 70 dbZ core that extended to over 25k feet.

The HC product showed giant hail at numerous slices throughout this period of very high storm intensity. Here are examples from the 2210Z volume scan.

At the time of these images, we received reports of baseball size hail, and numerous reports of golf ball size hail.

Here is a look at a plethora of MRMS products at 2210Z.

MRMS at 2210Z (part 1).

MESH showed a maximum hail size of over 2.75″ in this image (and actually peaked at over 3″ near the same time). This is in the top left of the first MRMS image.

POSH (which is directly proportional to MESH) reached values of 100% when MESH indicated about 2.5″ or greater. This is in the top left of the second MRMS image.

Reflectivity at -20 degrees C (top right in the second MRMS image) is over 70 dBZ. The 60 dBZ echo reached over 20k feet above the freezing level (bottom left in the second MRMS image). Vertically Integrated Ice (bottom right of the second MRMS image) is over 50 kg/m2, too high for the default color scale.

This data helped provide forecaster confidence in the fact that hail was extremely large in this particular supercell.

–Hatzos