Johannesburg - Residents in Gauteng and Mpumalanga were urged to prepare for massive thunderstorms and possible hail over the weekend, the Tshwane emergency services said on Friday.*Has your area been affected by hail or downpours? E-mail or upload your photos and be feature on News24!The national weather services sent a warning that they expect huge thunderstorms from Friday night onwards, with possible hail and strong winds," spokesperson Johan Pieterse said."This will continue on the weekend as well."Pieterse said people should make plans to ensure their children were safe and that they stayed away from low-lying bridges.