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Story summary
- A cold front brings beneficial rainfall to the DC region tonight, with scattered showers and thunderstorms.
- Rain totals may reach about half an inch, helping drought relief.
- Wednesday starts with showers, then clears by midday for sunny skies and cooler temperatures.
- Snow Advance Index (SAI) suggests Siberian snow could yield a colder, snowier East Coast winter; meteorologists monitor DC-area patterns.
