MD 1509 CONCERNING SEVERE THUNDERSTORM WATCH 453… FOR PORTIONS OF SOUTHEAST KANSAS…WESTERN MISSOURI…AND NORTHERN OKLAHOMA
Mesoscale Discussion 1509 NWS Storm Prediction Center Norman OK 0447 PM CDT Wed Aug 16 2017 Areas affected...Portions of southeast Kansas...western Missouri...and northern Oklahoma Concerning...Severe Thunderstorm Watch 453... Valid 162147Z - 162315Z The severe weather threat for Severe Thunderstorm Watch 453 continues. SUMMARY...Thunderstorms, at times severe, will continue to develop across WW 453 this evening. Through late evening, storms will likely merge into eastward-moving lines/clusters, with the severe threat transitioning primarily to damaging winds. DISCUSSION...Regional radar mosaic data depict several clusters of strong/severe storms have developed along both a cold front and remnant outflow boundary over southern Kansas. Cells have exhibited a somewhat disorganized evolution so far, characterized by splits and mergers. This evolution is likely the result of continued front-parallel deep-layer flow and only modest west/southwesterly winds around 700mb. Despite this, steep mid-level lapse rates and 500mb flow around 50 kt (based on recent KVNX VWP data) suggest large hail remains a threat with any semi-discrete cells. However, the overall severe threat should further transition to damaging winds this evening, as storms congeal into small forward-propagating segments and push towards western Missouri. ..Picca.. 08/16/2017 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...SGF...EAX...TSA...TOP...ICT...OUN...DDC... LAT...LON 37199865 38379595 38759460 38709357 38429327 37189344 36769390 36559601 36699813 36859860 37199865
from SPC Mesoscale Discussions http://bit.ly/2fMXXAQ
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