Severe Storm Outlook Narrative (AC)
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Issued by NWS
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663 ACUS11 KWNS 280250 SWOMCD SPC MCD 280250 NDZ000-SDZ000-280445- Mesoscale Discussion 1458 NWS Storm Prediction Center Norman OK 0950 PM CDT Thu Jun 27 2024 Areas affected...southern North Dakota into central South Dakota Concerning...Severe Thunderstorm Watch 478... Valid 280250Z - 280445Z The severe weather threat for Severe Thunderstorm Watch 478 continues. SUMMARY...The severe threat continues across Severe Thunderstorm Watch 478. Severe gusts are the main threat with an ongoing MCS, particularly over SD. DISCUSSION...A well-organized MCS continues to progress eastward across central portions of central ND into central SD. This MCS has a history of many severe gusts. However, the severe-gust frequency has recently been trending downward. This weakening trend coincides with nocturnal stabilization, where boundary-layer decoupling and increasing MLCINH has been noted via 02Z mesoanalysis. Still, 2000+ J/kg MLCAPE resides ahead of the southernmost portion of the MCS in central SD, where strong wind gusts (perhaps exceeding 60 mph) are still possible over the next few hours. Nonetheless, an overall weakening trend should continue into the evening hours. ..Squitieri.. 06/28/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...ABR...BIS...UNR... LAT...LON 44210099 45460128 46760114 47160078 47009979 46549916 45509878 44419883 44089948 44010032 44210099