Severe Storm Outlook Narrative (AC)
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Issued by NWS
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483 ACUS11 KWNS 110352 SWOMCD SPC MCD 110351 IAZ000-MOZ000-NEZ000-110545- Mesoscale Discussion 1638 NWS Storm Prediction Center Norman OK 1051 PM CDT Thu Jul 10 2025 Areas affected...Eastern Nebraska...Southwest/Central Iowa Concerning...Severe Thunderstorm Watch 503... Valid 110351Z - 110545Z The severe weather threat for Severe Thunderstorm Watch 503 continues. SUMMARY...Strong-severe thunderstorms are expected to spread across much of southwestern/central Iowa in association with a larger complex of storms. DISCUSSION...South Dakota/Nebraska short-wave trough is progressing steadily east late this evening. In response to this feature, 1km VAD winds are increasing across eastern KS into northwestern MO. This appears to be aiding some upscale growth to a larger complex of storms that extends across eastern NE into western IA. Over the last hour or so, a notable increase in updraft intensity is ongoing across Shelby/Pottawattamie County IA, and an expanding precip shield is becoming a bit more conducive for surging outflow with this activity. Given the large-scale support, and focused warm advection, this MCS should continue propagating across the remainder of ww503 over the next several hours. ..Darrow.. 07/11/2025 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...DMX...EAX...OAX... LAT...LON 41629734 42329348 40739348 40049732 41629734 MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 95 MPH MOST PROBABLE PEAK WIND GUST...65-80 MPH MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN