Severe Storm Outlook Narrative (AC)
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ACUS11 KWNS 260009
SWOMCD
SPC MCD 260009
ILZ000-IAZ000-NEZ000-260115-
Mesoscale Discussion 1416
NWS Storm Prediction Center Norman OK
0709 PM CDT Tue Jun 25 2024
Areas affected...Eastern Nebraska...southern Iowa...and northwestern
Illinois
Concerning...Severe Thunderstorm Watch 459...
Valid 260009Z - 260115Z
The severe weather threat for Severe Thunderstorm Watch 459
continues.
SUMMARY...Scattered severe thunderstorms capable of producing hail
up to 1.5-2.5" in diameter, localized damaging wind gusts, and a few
landsput tornadoes will continue across severe thunderstorm watch
459.
DISCUSSION...Several discrete supercells are ongoing along a cold
front from eastern NE, to southern IA, and far northwestern IL. Both
large hail and landspout tornadoes have already been reported with
several of these thunderstorms. The latest surface mesoscale
analysis and forecast soundings from around the region indicate
enhanced stretching (0-3 km CAPE exceeding 150 J/kg) is occurring in
conjunction with localized increased low level vorticity in close
proximity to the cold front. Slow storm motions are resulting in
long residence times within this favored area for landspout
formation, especially from south-central IA westward into eastern
NE. Upscale growth is not anticipated until late this evening. Until
then, while daylight remains, the chance for landspout tornadoes and
large hail will continue with the more discrete supercells that
manage to avoid storm interactions/mergers.
..Barnes.. 06/26/2024
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...LOT...ILX...DVN...DMX...FSD...OAX...GID...LBF...
LAT...LON 42429727 42459763 42229848 41859849 41189824 40589582
40599335 40629140 41668938 42198934 42179039 41869138
41879563 42269639 42429727