249
ACUS11 KWNS 240855
SWOMCD
SPC MCD 240854
IAZ000-MOZ000-NEZ000-241100-

Mesoscale Discussion 0925
NWS Storm Prediction Center Norman OK
0354 AM CDT Fri May 24 2024

Areas affected...Iowa/northern Missouri and vicinity

Concerning...Severe Thunderstorm Watch 299...300...

Valid 240854Z - 241100Z

The severe weather threat for Severe Thunderstorm Watch 299, 300
continues.

SUMMARY...Risk for damaging winds and a couple of brief tornadoes
continues across western and into central Iowa, and vicinity.

DISCUSSION...A well-organized line of storms with embedded LEWPs and
occasional misocyclones continues moving eastward at around 40 kt --
though at near 50 kt within the surging portion of the line crossing
west-central Iowa at this time.  Several gusts to near/in excess of
severe levels have been received over the past hour or so, and
expect risk to continue eastward as the line moves through an amply
unstable environment into central parts of Iowa.

Separately, more isolated/cellular storms continue to increase in
coverage across Iowa ahead of the main convective line, in a zone of
warm advection.  This convection is elevated atop a rather deep
(1.5km) but weakly stable surface-based layer, suggesting that
primary severe potential should remain large hail with this
activity, until the main line of storms and associated cold pool
arrives from the west.  One exception may be with a cluster of cells
moving quickly northeastward across Keokuk and Jefferson Counties in
southeastern Iowa, which seems to be evolving into a more
organized/bowing cluster (suggesting potential for strong gusts that
may reach the surface).

..Goss.. 05/24/2024

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...DVN...DMX...EAX...FSD...OAX...

LAT...LON   40099565 40379582 41299502 42049504 42769557 43079484
            42779335 42079209 40839163 40439257 40019554 40099565