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 The system will push another cold front into the upper Mississippi River
Valley, producing widespread scattered showers. Heavier rain showers will persist along the downwind shores as flow from the northwest picks up moisture from the Great Lakes and creates bouts of heavier rain. This system will head south into the Ohio River
Valley and Midwest through Friday afternoon and evening.
In the South, the tail end of a cold front will weaken over Florida, amid diminishing thunderstorm activity in the state. A few showers may persist, but heavy rains and strong storms are not likely.
Out West, high pressure over the Western states will bring another warm and dry day with dangerous fire weather conditions. Areas of smoke and poor visibility will continue for the Pacific Northwest and
Intermountain West as active wildfires create poor air quality for the region.
The northern Rockies will see highs in the 70s again on Friday, about 10 degrees above seasonable for the region.
Temperatures in the Lower 48 states ranged Thursday from a morning low of 24 degrees at West Yellowstone, Mont., to a high of 104 degrees at El Centro, Calif.
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