(EXTRACTED FROM FXUS61 KILN 201950) 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.