Aviation Forecast Discussions Data
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(EXTRACTED FROM FXUS65 KPSR 311957)


    Updated at 1733Z.
    
    South-Central Arizona including KPHX, KIWA, KSDL, KDVT:
    
    An upper low centered over far northern Baja, MX will slowly track
    south-southeastward along the peninsula through Wednesday morning
    before beginning to track eastward across northwest Mexico.
    Showers are expected to primarily affect western Maricopa County
    and western portions of Greater Phoenix (including GEU and GYR).
    But, anticipate showers in the vicinity at the rest of the TAF
    sites through at least 20Z. Showers expected to taper off during
    the latter half of the afternoon. Given the persistent location of
    the showers, a westerly component will be favored for the surface
    wind but east/northeast in the lower levels above the surface due
    to the gradient. Given the push and pull of those counter-acting
    factors, variability in wind directions will be common through at
    least 20Z before westerly component takes hold later in the
    afternoon. As for sky cover, anticipate ceilings of BKN-OVC050
    (possibly as low as BKN-OVC040) but otherwise BKN-OVC060-080.
    Ceilings gradually increase during the afternoon and evening.
    Couldn't rule out a stray shower overnight but expect those, if
    any, to stay over Pinal County.
    
    Southeast California/Southwest Arizona including KIPL and KBLH:
    
    An upper low centered over far northern Baja, MX will slowly track
    south-southeastward along the peninsula through Wednesday morning
    before beginning to track eastward across northwest Mexico.
    Northerly surface winds will predominate this afternoon with some
    gustiness of 20-25 kts. Northerly winds linger this evening
    before trending to westerly at KIPL late tonight (continuing
    N/NWly at KBLH overnight). At KIPL, ceilings of BKN- OVC070-090
    will slowly increase this afternoon and evening before scattering
    out later tonight (ceilings already AOA BKN120 at KBLH).
    
    AJ
    FIRE WEATHER...18