Patrick K
EF0
NE mesonet showing the warm front has made it well into southeastern Nebraska. Currently there's a PDS tornado warning for the isolated supercell north of Lincoln, although recent radar scans seem to indicate weakening.
You can almost here the faint echos of people asking why there was no moderate or high risk today.
I've seen this discussed before, but here's another example of a day that is unarguably a tornado outbreak with a relative dearth of hail reports (especially significant hail).
I do not know the reason for this - whether it is a reporting issue/bias or true atmospheric character.
View attachment 25022
Seen some chasers/researchers (notably Trey Greenwood [Convective Chronicles] and Cameron Nixon) posit that strong low-level shear, favorable for tornadoes, is not favorable for large hail production.
Keep in mind that the spatial smoothing radius used on that site does not match the one used by SPC for its official forecast verification. The above overly smooths things and thus produces higher practically perfect probabilities than SPC's verification system does.Even without the additional tornadoes that will be found by surveys, the correct forecast yesterday was "high risk" on the SPC scale.
The above overly smooths things and thus produces higher practically perfect probabilities than SPC's verification system does.