Aviation Forecasts Discussions (AFD) INFO

(EXTRACTED FROM FXUS63 KLSX 180553)


    (For the 06z TAFs through 06z Saturday Night)
    Issued at 1141 PM CST Fri Nov 17 2017
    
    Current indications are that most of the are will stay VFR through
    most of the night with the exception of parts of northeast
    Missouri and west central Illinois. Ceilings will lower to MVFR
    and then IFR by 12Z. Isolated showers will increase in coverage
    over the area toward daybreak as well, and scattered thunderstorms
    will also develop as warm most air continues to move into the
    region ahead of a strong cold front. Flight conditions will
    deteriorate area-wide during the morning but widespread IFR only
    looks likely north of the I-70 corridor. Some patches of IFR CIGS
    are possible further south, but should be transient and short-
    lived. MVFR CIGS/VSBYS will likely prevail after FROPA in the
    afternoon with precipitation ending from west to east by 00Z. Some
    of the precipitation may end as a rain/snow mix over northern
    portions of the forecast area during the early afternoon. Strong
    northwest wind behind the front will likely gust to 35-40kts.
    Clouds should rapidly exit the area in the late afternoon/early
    evening from west to east and wind is expected to diminish early
    Saturday evening. VFR flight conditions are expected thereafter.
    
    SPECIFICS FOR KSTL:
    
    VFR flight conditions are expected to prevail at Lambert for the
    rest of the night. Isolated showers will be possible...and there
    may be a stray patch of MVFR that moves over the terminal before
    12Z. Expect increasing coverage in showers and a few thunderstorms
    Saturday morning ahead of a strong cold front. FROPA is expected
    between 15Z and 16Z which should bring the chance for
    thunderstorms to an end. MVFR ceilings are likely behind the
    front...possibly lower...with continuing light rain through the
    early to mid afternoon. Expect rain to end before 00Z with clouds
    scattering out during the early evening. Strong northwest wind
    behind the front will likely gust to between 35-40kts. The wind
    should diminish during the early evening.
    
    
    Carney