(EXTRACTED FROM FXUS63 KARX 281109)


    (For the 12Z TAFS through 12Z Thursday morning)
    Issued at 605 AM CDT Wed Jul 28 2021
    
    Variety of impacts to aviation between early morning fog and rounds
    of convection today. And a lot will depend on trends in upstream
    convection through the day.
    
    Between convective systems this morning watching patchy valley fog
    and occasional related low stratus but that should burn off or
    dissipate a few hours after sunrise. Meantime some patchy LIFR to
    IFR conditions related to that.
    
    Upstream convection is riding ridge of instability and should
    continue to dive into area next few hours. Earlier system laid
    outflow or boundary that might push bulk of this next round more
    south but still could have some temporary impacts to TAF sites,
    including round of MVFR if storms track close. This should be
    temporary though with this system moving off allowing for rebuilding
    later in day.
    
    Main focus on evening convection appears to be more in Wisconsin and
    may miss TAF sites entirely, but honored risk at KLSE. If cap holds,
    storms could remain off to the east.