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Severe Storm Outlook Narrative (AC)
Issued by NWS
Issued by NWS
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787 ACUS01 KWNS 220053 SWODY1 SPC AC 220052 Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0752 PM CDT Fri Jun 21 2024 Valid 220100Z - 221200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS EVENING ACROSS PARTS OF CENTRAL MONTANA...EASTERN WYOMING...NORTHEASTERN COLORADO...SOUTHERN SOUTH DAKOTA...NEBRASKA...SOUTHERN MINNESOTA...NORTHWESTERN IOWA... ...SUMMARY... Widely scattered strong to severe thunderstorm development remains possible this evening across the Rockies, adjacent portions of the Southwest, and parts of the central Great Plains into the Upper Midwest. ...01Z Update... Downstream of broad, weak mid/upper troughing, widely scattered strong to severe thunderstorm activity persists across the Rockies, adjacent portions of the Southwest and Great Plains, with additional widely scattered activity focused near the northern periphery of prominent mid-level ridging centered over the Mid South. While convection across most areas already appears in the process of slowly waning, an evolving cluster of storms across parts of central into northeastern Nebraska could still strengthen and organize further this evening into the overnight hours, accompanied by increasing risk for potentially damaging wind gusts. The environment across the Missouri Valley, ahead of it, remains potentially unstable, with CAPE on the order of 1500-2000+ J/kg, as a belt of 30-40+ kt south-southwesterly to westerly flow in the 850-500 mb layer noses northeast of the Kansas/Nebraska border toward the Upper Midwest. ..Kerr.. 06/22/2024 $$