Severe Storm Outlook Narrative (AC)
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Issued by NWS
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594 ACUS11 KWNS 102345 SWOMCD SPC MCD 102345 IAZ000-NEZ000-SDZ000-110145- Mesoscale Discussion 1635 NWS Storm Prediction Center Norman OK 0645 PM CDT Thu Jul 10 2025 Areas affected...Eastern Nebraska...Western Iowa Concerning...Tornado Watch 501... Valid 102345Z - 110145Z The severe weather threat for Tornado Watch 501 continues. SUMMARY...Severe threat continues across eastern Nebraska into western Iowa. DISCUSSION...Short-wave ridging that has been observed over the lower MO Valley is shifting east as a secondary, notable short-wave trough is advancing across central SD/western NE. Low-level warm advection is focused into this region, just north of a boundary that is draped from south of Grand Island-Omaha-north of Des Moines. This warm-advection regime favors rotation, and a few slow-moving supercells can be expected in advance of the short wave this evening. While some supercell structures are possible, with time convection may evolve into larger clusters, and possibly an MCS. LLJ is forecast to strengthen across northeast KS into southwest IA later this evening, and this should encourage more robust convection to propagate into this portion of the MO Valley with time. ..Darrow.. 07/10/2025 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...DMX...FSD...OAX...GID...LBF... LAT...LON 40409966 42579967 43069519 40889519 40409966 MOST PROBABLE PEAK TORNADO INTENSITY...85-115 MPH MOST PROBABLE PEAK WIND GUST...55-70 MPH MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN