Aviation Forecast Discussions Data
Select Site:


    A warm and humid airmass will remain in place through tonight as
    a mid level ridge moves off to the east and a weather system
    approaches the Great Lakes from the west. Winds will diminish
    this evening, then as the pressure gradient increases, winds
    will pick up a tad toward morning. There could be some patchy
    river fog near KLUK, but the increasing gradient may prevent it
    from getting any lower than MVFR visibilities.
    On Friday, upper level energy will move across the Great Lakes
    as low pressure moves into southeast Canada. A trailing cold
    front will push southeast into the region, affecting the
    terminals late in the day and into the evening. As the airmass
    destabilizes, showers and thunderstorms will develop, scattered
    ahead of the front, and more numerous along the front. Have
    placed a VCTS at the 30 hour KCVG terminal to indicate the
    approach of the front there, otherwise, best chance of storms
    will be after 18Z for the remainder terminals. The pressure
    gradient will increase, and with stronger winds aloft, gusty
    winds will mix down to the surface. Wind gusts will range in the
    20 to 30 knot range during the afternoon, or after 16Z.
    OUTLOOK...Thunderstorms likely Friday night. Thunderstorms
    possible Monday and Tuesday.