Weather for Lavaca, AR - Lavaca, AR Weather, Current Weather in Lavaca, AR. Local weather report for Lavaca, AR, Local Lavaca, AR weather. Forecast for Lavaca, Arkansas, Lavaca, AR weather forecast. Find your local Lavaca weather forecast. Lavaca, AR weather conditions. Weather outlook for Lavaca, AR. Weather report for Lavaca, AR. Weather Maps and Driving Directions Maps. Lavaca Weather - Weather Lavaca.