National Weather Service forecasts indicate a frontal system and associated low pressure will drive widespread rain across the eastern U.S. and parts of the Midwest on October 11, with 70-100% precipitation probabilities and totals of 0.5-1.5 inches in many locations through the overnight period. By October 12, the system shifts northeastward, yielding clearing skies and sharply lower rain chances after early morning in the Northeast and Mid-Atlantic, while the South, Plains, and West remain mostly dry under high pressure. NOAA point forecasts and model guidance show this transition tied to rising surface pressures and veering winds, consistent with typical autumn frontal passages. Traders should monitor updated NWS short-range guidance and radar trends through resolution for any lingering coastal showers or model shifts.