Red Flag Warning

* AFFECTED AREA...Middle Yukon Valley, Lower Yukon and Innoko Valleys, North Slopes of the Western Alaska Range and Upper Kuskokwim Valley.

* TIMING...Until 10 PM AKDT Sunday.

* THUNDERSTORM COVERAGE INDEX...Scattered.

* WINDS...Near thunderstorms, gusts could reach as high as 40 mph.

* HUMIDITY...As low as 25 percent.

* TEMPERATURES...Highs in the mid 80s. Lows in the upper 40s.

* IMPACTS...Critical fire weather conditions are expected this weekend due to a combination of thunderstorm activity, temperatures reaching into the upper 70s to low 80s, relative humidities near 25 percent, and gusty winds.