Multiple severe thunderstorms in the Hastings CWA. The algorithm lines up very well with where overshooting tops are observed on the visible and with our current SVR Warnings.
-Shasta
General Information and News
We held off on issuing a warning for a cell moving into our CWA from Dawson County to the south where it produced 3″ diameter hail at 2305 UTC. For 3 reasons we held off.
1. the near storm environment had already been worked over by previous storms and radar showed stratiform rain falling in our area.
2. Prob Severe dropped from 96% at 2316 UTC to 41% at 2326 to 5% at 2330.
3. Lightning was not very impressive and diminished to near zero in the time series plot.
A rapidly growing storm developed over Putnam county IL and is slowly shifting eastward into La Salle county IL. The lightning jump algorithm has indicated as much as a 5 sigma increase with this storm. The CIMSS Prob Severe Model has indicated a high probability of severe storms over Putman and La Salle County. See images of below, including the the severe thunderstorm warning issued for La Salle County.
-Wacha