OUN-WRF 18 May 2011

2355Z Update: Although OUN-WRF continues to generate well defined supercells east of dryline across central Oklahoma, confidence very low due to cooling boundary layer. Dryline is just beginning a shift westward so will need to watch it for just a little while longer. 19/0100Z.

OUN-WRF, since 18z run, has consistently shown signal for convective development just west of OKC metro. Embedded supercells, with southern flank 2-5km updraft helicities 200+ m2/s2 and deviant motions. 20-21z runs want to bring supercell through Norman 23-2330z with southern flank of this storm shifting south and turning right toward Ada. Model has been too eager to develop convection, but depiction of central Oklahoma impacts continues.

Brief convective element over western Major county and weak echoes across southwest Oklahoma from wildfire. Will continue to monitor CI products and trends of ounwrf.  kbrown 2215z

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