NWS Storm Prediction Center Norman OK
0413 AM CDT Tue Aug 11 2026
AREAS AFFECTED...much of northern and central Iowa
CONCERNING...Severe potential...Watch possible
VALID 110913Z - 111115Z
PROBABILITY OF WATCH ISSUANCE...40 percent
SUMMARY...Developing thunderstorms may continue to evolve into a
better organized cluster through 6-8 AM CDT. Eventually, this
probably will become accompanied by increasing potential for strong
to severe surface gusts, though how soon remains uncertain.
DISCUSSION...Convection continues to increase and intensify within a
zone of stronger warm advection, along a tightening
lower/mid-tropospheric baroclinic ....... more