A tropical wave would begin to affect the islands tonight into Monday, triggering some scattered moderate showers and possible thunderstorms. The chances of showers decreases on Monday afternoon due to dry air interaction. Early Tuesday however, instability trailing the wave would allow for some scattered showers. The Grenadines could experience these conditions during nightfall as a shearline affects the islands. Instability associated with a disturbance could trigger a few showers across the mainland late Wednesday afternoon.