A weather system will mix with moisture out of the Pacific to make shower and thunderstorm activity likely statewide today.  Western and northern portions of the state have the best chance for widespread shower and thunderstorm activity, while the rest of the state will see spotty showers and thunderstorms.  However, heavy rain and flash flooding will be possible at times throughout the state today and overnight.  Slightly reduced visibility is expected at times if traveling along I-90 and portions of I-80 from Arlington to the Utah state line due to heavy rainfall.  Expect cloudy to mostly cloudy skies with cooler than normal temperatures statewide today.  Daytime highs will remain in the 70's.  Cool temperatures with showers and thunderstorms continue to be likely on Saturday as a cold front passes through the area.